'C' / 'S' scroll sgrôl 'C' / 'S' 'C' / 'S' scrolls sgrôl 'C' / 'S' 'E' alloy aloi 'E' 'F' hole seindwll 'F' holes seindwll 'blue' notes nodau 'blue' 2,4-dichlorophenoxyacetic acid asid 2,4-dicloroffenocsiasetig 2,4-dichlorophenoxyacetic acids asid 2,4-dicloroffenocsiasetig 3 plywood pren tair haen 3 plywoods pren tair haen A level Safon Uwch A levels Safon Uwch A line skirt sgert linell A A line skirts sgert linell A A major A fwyaf A majors A fwyaf A minor A leiaf A minors A leiaf AB produced AB wedi ei estyn AB produceds AB wedi ei estyn AB styrene styren AB AB styrenes styren AB AD OC (Anno Domini) AF AFF (across the flats of hexagonal nut) ALGOL ALGOL AS level Safon Uwch Atodol AS levels Safon Uwch Atodol ASCII code cod ASCII ASCII codes cod ASCII Aaronic Blessing Bendith Aaron Abelian group grŵp Abel Abelian groups grŵp Abel Abendlied Abendlied Abjuration Oath Llw Ymwadiad Abolition of Slavery Act Deddf Dileu Caethwasiaeth Abra file ffeil Abra Abra files ffeil Abra Abra frame ffrâm Abra Abra frames ffrâm Abra Access to Justice Act Deddf Mynediad i Gyfiawnder Accredited Training Organization Cyfundrefn Hyfforddi Gydnabyddedig (ATO) Accumulated Information Field Maes Gwybodaeth Gronedig (AIF) Acquired Immune Deficiency Syndrome Syndrom Diffyg Imiwnedd Caffaeledig (AIDS) Acrilan Acrilan Act Against Pluralities Deddf yn Erbyn Amlblwyfiaeth Act for the Propagation of the Gospel Deddf Taenu'r Efengyl Act in Absolute Restraint of Annates Deddf i Lwyr Atal Anodau Act in Conditional Restraint of Annates Deddf Amodol Atal Anodau Act of Annates Deddf Anodau Act of Appeals Deddf Apeliadau Act of Attainder Deddf Adendro Act of Dispensations Deddf Trwyddedau Act of Revocation Deddf Dirymiad Act of Settlement Deddf Ardrefnu Act of Six Articles Deddf y Chwe Erthygl Act of Submission of the Clergy Deddf Ymostyngiad y Clerigwyr Act of Supremacy Deddf Goruchafiaeth Act of Treasons Deddf Brad Act of Uniformity Deddf Unffurfiaeth Act of Union Deddf Uno Adam Adda Adam of Usk Adda o Frynbuga Addled Parliament Senedd Glwc (1614) Adi Granth Adi Granth Admiralty Morlys Admiralty brass pres Morlys Admiralty gunmetal gwnfetel Morlys Admiralty gunmetals gwnfetel Morlys Admonition to the Parliament Cerydd i'r Senedd Adoption Act Deddf Mabwysiadu Adullamites Adulamiaid Advertising Standards Authority Awdurdod Safonau Hysbysebu Advisory Committee for Wales Pwyllgor Ymgynghorol Cymru Aeolian mode modd Aeolaidd Aeolian modes modd Aeolaidd African drumming music cerddoriaeth ddrymio Affricanaidd African drumming musics cerddoriaeth ddrymio Affricanaidd African empire ymerodraeth Affrica African empires ymerodraeth Affrica Age Concern Cyngor yr Henoed Age of Austerity Oes y Llymder Age of Enlightenment Oes y Goleuo Age of Faith Oes Ffydd Age of Improvement Oes Cynnydd Age of Reason Oes Rheswm Age of the Saints Oes y Saint Agreement of the People Cydsyniad y Bobl Agricultural Adjustments Act Deddf Cymhwyso Amaethyddiaeth Agricultural Revolution Chwyldro Amaethyddol Alberti bass bas Alberti Albigensian Albigensaidd Albigensian Albigensiad Albigensian Crusade Croesgad yn erbyn yr Albigensiaid Albumblatt Albumblatt Aldine Press Gwasg Aldus Manutius Alexander the Great Alecsander Fawr Alexandrine Alecsandraidd Alfred the Great Alffred Fawr Aliens Act Deddf Estroniaid All Wales Strategy Strategaeth Cymru Gyfan (AWS) Allah Allah Allen key allwedd Allen Allen screw sgriw Allen Allen screws sgriw Allen Alliance Control Commission Comisiwn Rheoli'r Gynghrair Alliance for Progress Cynghrair er Cynnydd Alps Alpau Ambrose Emrys Ambrosian chant siant Ambrosaidd Ambrosian chants siant Ambrosaidd American Revolution Chwyldro Americanaidd American organ organ Americanaidd American organs organ Americanaidd Amnesty International Amnest Rhyngwladol Amrit-dhari Amrit-dhari Amrit-dharis Amrit-dhari Amrit-sanskar Amrit-sanskar Amrit-sanskars Amrit-sanskar Anabaptist Ailfedyddiwr Anarchist Party Plaid Anarchaidd Ancient Britons Hen Frythoniaid Ancient Egypt Hen Aifft Ancient Greece Hen Roeg Ancient of Days Hen Ddihenydd Angevin Angefin Anglican Anglican Anglican Anglicanaidd Anglican chant siant Anglicanaidd Anglican chants siant Anglicanaidd Anglicanism Anglicaniaeth Anglicization Seisnigo (of language, society) Anglicized Seisnigaidd Anglo-Irish Treaty Cytundeb Eingl-Wyddelig Anglo-Norman Eingl-Norman Anglo-Norman Eingl-Normanaidd Anglo-Norman Law Cyfraith Eingl-Normanaidd Anglo-Saxon Eingl-Sacsonaidd Anglo-Saxon Eingl-Sacsoneg (language) Anglo-Saxon Chronicles Croniclau'r Eingl-Sacsoniaid Anglo-Saxon Law Cyfraith Eingl-Sacsonaidd Anno Domini Oed Crist (AD) Ansoff Matrix Matrics Ansoff Antarctic Antartig Anti-Corn Law League Cynghrair er Diddymu'r Deddfau Ŷd Anti-Marcionite Prologues Prologau Gwrth-Farcionaidd Antichrist Anghrist Antiochene Antiochaidd Apostolic Fathers Tadau Apostolaidd Apostolic Succession Olyniaeth Apostolaidd Appelate Jurisdiction Act Deddf Awdurdod Apeliadol Appellant Lords Arglwyddi Apelyddol Arab League Cynghrair Arabaidd Arabic gum gwm Arabig Arabic gums gwm Arabig Aramaic Aramaeg (of language) Aramaic Arameaidd Aramaism Aramaegeb Archimedean drill dril Archimedes Archimedean drills dril Archimedes Archimedean spiral sbiral Archimedes Archimedean spirals sbiral Archimedes Arctic Arctig Argand diagram diagram Argand Argand diagrams diagram Argand Argentine Archentaidd Argentine Archentwr Arkansas oilstone carreg hogi Arkansas Arkansas oilstones carreg hogi Arkansas Arminian Arminaidd Arminian Arminiad Arminianism Arminiaeth Army High Command Pen Reolaeth y Fyddin Arnulph Arnwlff Art Nouveau Art Nouveau Arthurian legend chwedl Arthuraidd Arthurian legends chwedl Arthuraidd Artisans' Dwelling Act Deddf Anheddau'r Gweithwyr Aryan Ariad Aryan Ariaidd Aryan Race Hil Ariaidd Ascension Thursday Dydd Iau Dyrchafael Ascetic Theology Diwinyddiaeth Asgetig Ash Wednesday Dydd Mercher Lludw Asharite Asharitiad Assisi embroidery brodwaith Assisi Atlantic Charter Siarter yr Iwerydd Atlantic coast arfordir yr Iwerydd Atlantic coasts arfordir yr Iwerydd Atlantic roller gwaneg Iwerydd Atlantic rollers gwaneg Iwerydd Attorney-General Twrnai Cyffredinol Audience Court Cwrt Gwrandawiad Augmentations Court Cwrt yr Ychwanegiadau Augustinian Awstinaidd Augustinian Awstiniad Augustinian Canons Canoniaid Awstinaidd Augustinian Friars Brodyr Sant Awstin Augustinian Order Urdd Sant Awstin Augustinian theodicy theodiciaeth Awstin Augustinianism Awstiniaeth Auld Alliance Hen Gynghrair Aurora Australis Goleuni'r De Aurora Borealis Goleuni'r Gogledd Austria Awstria Austro-Piedmontese war rhyfel Awstria a Piedmont Austro-Piedmontese wars rhyfel Awstria a Piedmont Austro-Prussian war rhyfel Awstria a Phrwsia Austro-Prussian wars rhyfel Awstria a Phrwsia Avignon Papacy Pabaeth Avignon Axis Powers Pwerau'r Axis Azores high gwasgedd uchel Azores Azores highs gwasgedd uchel Azores Aztec Astec Aztec Astecaidd B major B fwyaf B majors B fwyaf B minor B leiaf B minors B leiaf B.S. recommendation argymhelliad B.S. B.S. recommendations argymhelliad B.S. BASIC BASIC BC CC (Before Christ) Backus-Naur form ffurf Backus-Naur Backus-Naur forms ffurf Backus-Naur Baisakhi / Vaisakhi Baisakhi / Vaisakhi Bakelite Bakelite Baker's fluid hylif Baker Baker's fluids hylif Baker Bakewell tart tarten Bakewell Bakewell tarts tarten Bakewell Balkan countries gwledydd y Balcan Balkans Balcanau, y Bank Charter Act Deddf Siarter y Banc Bank of England Banc Lloegr Bank of Scotland Banc yr Alban Baptist Bedyddiwr Barrowist dilynwr Barrow Bartholomew Bartholomeus Basal Metabolic Rate Cyfradd Metabolaeth Waelodol (BMR) Batesian mimicry dynwarediad Batesaidd Battle of Britain Brwydr Prydain Battle of the Somme Brwydr y Somme Bauhaus designer dylunydd Bauhaus Bauhaus designers dylunydd Bauhaus Bavarian Bafaraidd Bavarian Bafariad Bayeux Tapestry Tapestri Bayeux Beaufort Scale Graddfa Beaufort Bebung Bebung Bedivere Bedwyr Bedouin Bedwin Before Christ Cyn Crist (BC) Before Present Cyn y Presennol (BP) Beguine Lleian Le Begue Belgium Gwlad Belg Benedict reagent adweithydd Benedict Benedict reagents adweithydd Benedict Benedictine Benedictiad Benedictine San Bened Berlin Congress Cyngres Berlin Berlin airlift awyrgludiad Berlin Berlin airlifts awyrgludiad Berlin Bessemer converter trawsnewidydd Bessemer Bessemer converter furnace ffwrnais drawsnewidydd Bessemer Bessemer converter furnaces ffwrnais drawsnewidydd Bessemer Bessemer converters trawsnewidydd Bessemer Bezier curve cromlin Bezier Bezier curves cromlin Bezier Bhagavad Gita Bhagavad Gita Bible Beibl Biblical Beiblaidd Bill of Rights Mesur Iawnderau Bishop William Morgan Esgob William Morgan Bishop of Bangor's jig dawns Esgob Bangor Bismarckian system cyfundrefn Fismarcaidd Bismarckian systems cyfundrefn Fismarcaidd Black Acts Deddfau Duon Black Book of the Household Llyfr Du Cyfrifon y Llys Black Code Cod y Caethion Du (Code Noir) Black Country Gwlad Ddu Black Death Pla Du Black Friar Brawd Du Black Friday Dydd Gwener Du Black Hand Llaw Ddu Black Power Pŵer Du Black Prince Tywysog Du Blanketeers Blancedwyr Blessed Gwynfydedig Blessed Virgin Mary Morwyn Fair Fendigaid Blood Bath of Stockholm Galanas Stockholm Bloody Assizes Brawdlys Gwaedlyd Bloody Mary Mari Waedlyd Bloody Sunday Sul y Gwaed Boadicea Buddug Board School Ysgol Bwrdd Board of Admiralty Bwrdd y Morlys Board of Education Bwrdd Addysg Board of Guardians Bwrdd Gwarcheidwaid Board of Health Bwrdd Iechyd Bodhisattva Bodhisattva Bodleian Library Llyfrgell Bodley Boer Boer Boer War Rhyfel y Boer Bohemian Brethren Brodyr Bohemia Bokhara couching cowtsio Bokhara Bolshevik Bolsiefig Bolshevik Bolsiefigaidd Bonapartism Bonapartiaeth Bond of Association Cwlwm Cydweithred Book of Advertisements Llyfr yr Hysbysebion Book of Discipline Llyfr Disgyblaeth Book of Hours Llyfr Oriau Book of Martyrs Llyfr Merthyron Book of Orders Llyfr Gorchmynion Book of Sports Llyfr Chwaraeon Boolean Boole Boolean algebra algebra Boole Boolean algebras algebra Boole Boolean expression mynegiad Boole Boolean expressions mynegiad Boole Boolean logic rhesymeg Boole Boolean logics rhesymeg Boole Boolean operation gweithrediad Boole Boolean operations gweithrediad Boole Boolean operator gweithredydd Boole Boolean operators gweithredydd Boole Boolean type math Boole Boolean types math Boole Boolean value gwerth Boole Boolean values gwerth Boole Boolean variable newidyn Boole Boolean variables newidyn Boole Bourbon restoration adferiad y Bourboniaid Bourbon restorations adferiad y Bourboniaid Bourbons Bourboniaid Bow Street Runner Ceidwad Bow Street Bow's notation nodiant Bow Bow's notations nodiant Bow Bowman's capsule cwpan Bowman Bowman's capsules cwpan Bowman Boxer Rising Gwrthryfel y Bocswyr Boyar Boiar Brahman Brahman Brahmin Brahmin (Sanskrit) Brave West Winds Gwyntoedd Grymus y Gorllewin Brethren of the Common Life Brodyr y Bywyd Cyffredin Brigadier Brigadydd Bristol board bwrdd Bryste Bristol boards bwrdd Bryste Britannia metal metel Britannia Britannia metals metel Britannia British Crime Survey Arolwg Trosedd Prydain British Electrical Approvals Board Bwrdd Cymeradwyo Trydan Prydain (BEAB) British Savings Bonds Bondiau Cynilo Prydeinig British School Ysgol Brydeinig British Standard Safon Brydeinig British Standard specification manyleb Safonau Prydeinig British Standard specifications manyleb Safonau Prydeinig British Standards Institution Sefydliad Safonau Prydeinig British film industry diwydiant ffilm Prydain Briton Brython (Ancient) Briton Prydeiniwr (Modern) Broadcasting Standards Commission Comisiwn Safonau Darlledu Bronze Age Oes Efydd Brother Preacher Brawd-Bregethwr Brownian movement symudiad Brown (motion) Brownian movements symudiad Brown (motion) Brussels sprouts ysgewyll Brythonic Brythonaidd Buddha Bwdha Buddhahood Bwdhadod Buddhism Bwdhaeth Buddhist Bwdhaidd Buddhist Bwdhydd Bunsen burner llosgydd Bunsen Bunsen burners llosgydd Bunsen Burgundian Bwrgwynaidd Burgundian Bwrgwyniad Byzantine Bysantaidd Byzantine chant siant Fysantaidd Byzantine chants siant Fysantaidd Byzantine music cerddoriaeth Fysantaidd Byzantine musics cerddoriaeth Fysantaidd C clef cleff C C clefs cleff C C major C fwyaf C majors C fwyaf C minor C leiaf C minors C leiaf C.R.C.A. sheet siten ddur meddal gloyw wedi'i rholio'n oer a'i hanelio'n oer C.R.C.A. sheets siten ddur meddal gloyw wedi'i rholio'n oer a'i hanelio'n oer CAI computer aided instruction CAI hyfforddiant drwy gymorth cyfrifiadur CAI computer aided instructions CAI hyfforddiant drwy gymorth cyfrifiadur CATE Committee for the Accreditation of Teachers Education Pwyllgor Achredu Addysg Athrawon CATS Consortium for Assessment and Testing in Schools CAPY Consortiwm Asesu a Phrofi mewn Ysgolion CATS Credit Accumulation and Transfer Scheme Cynllun Casglu a Throsglwyddo Credydau CESIL CESIL CFCs CFCau CNAA Cyngor Dyfarniadau Academaidd Cenedlaethol COBOL COBOL CODASYL CODASYL Caerffili cheese caws Caerffili Caerffili cheeses caws Caerffili Caesar Cesar Caesarean birth genedigaeth Gesaraidd Caesarean births genedigaeth Gesaraidd Caesarean section toriad Cesaraidd Caesarean sections toriad Cesaraidd Caledonian Caledonaidd Calvin Calfin Calvin cycle cylchred Calvin Calvin cycles cylchred Calvin Calvinism Calfiniaeth Calvinistic Methodism Methodistiaeth Galfinaidd Cambrian Cambriaidd Canadian Shield Tariandir Canada Candlemas Gŵyl Fair y Canhwyllau Canon Law Cyfraith Ganonaidd (Roman Catholic) Cape Horn Horn, Yr Cape of Good Hope Penrhyn Gobaith Da Capetian Capetaidd Capital Transfer Tax Treth Trosglwyddo Cyfalaf Capuchin Friar Brawd Cycyllog Capuchin Order Urdd y Brodyr Cycyllog Caractacus Caradog Carbonari Carbonariaid Carlsbad decrees archddyfarniadau Carlsbad Carmelite Friar Brawd Carmelaidd Carmelite Order Urdd y Carmeliaid Carolingian Carolingaidd Carolingian art celfyddyd Garolingaidd Carolingian arts celfyddyd Garolingaidd Carragheen moss mwsogl Carragheen Cartesian Cartesaidd Cartesian coordinates cyfesurynnau Cartesaidd Cartesian dualism deuoliaeth Gartesaidd Cartesian dualisms deuoliaeth Gartesaidd Cartesian equation hafaliad Cartesaidd Cartesian equations hafaliad Cartesaidd Carthusian Carthwsiad Carthusian Order Urdd y Carthwsiaid Casket Letters Llythyrau'r Blwch Casparian strip stribed Caspari Casparian strips stribed Caspari Castilian Castilaidd Castilian Castiliad Cathar Cathariad Cathay Company Cwmni Cathay Catherine Catrin Catherine the Great Catrin Fawr Catholic Pabydd (of Roman Catholic) Catholic Emancipation Rhyddfreinio'r Pabyddion Catholic Emancipation Act Deddf Rhyddfreinio'r Pabyddion Catholic Majesties Eu Mawrhydi Catholig Catholic Martyrs Merthyron Pabyddol Catholic association cymdeithas Gatholig Catholic associations cymdeithas Gatholig Catholic church eglwys Gatholig Catholic churches eglwys Gatholig Catholic leadership arweinwyr Catholig Catholicism Pabyddiaeth Celsius Celsius Celtic Celtaidd Celtic Celteg (language) Celtic art celfyddyd Geltaidd Celtic arts celfyddyd Geltaidd Celtic cross croes Geltaidd Celtic form ffurf Geltaidd Celtic forms ffurf Geltaidd Celtic harp telyn Geltaidd Celtic harps telyn Geltaidd Celtic society cymdeithas Geltaidd Central Criminal Court Llys Troseddol Canolog Central Office of Information Swyddfa Hysbysrwydd Ganolog Central Place Theory Damcaniaeth Man Canol Central Welsh Board Bwrdd Canol Cymreig Centre for Policy Studies Canolfan Astudiaethau Polisi Centronics interface rhyngwyneb Centronics Centronics interfaces rhyngwyneb Centronics Certificate of Education Tystysgrif Addysg (CoE) Certificate of Extended Education Tystysgrif Addysg Estynedig (CEE) Certificate of Pre-Vocational Education Tystysgrif Addysg Gyn-Alwedigaethol (CPVE) Chambers of Reunion Siambrau Ailuniad Chancellor of the Exchequer Canghellor y Trysorlys Chancery Siawnsri Charlemagne Siarlymaen Charles the Bald Siarl Foel Charles the Bold Siarl Ddewr Charles the Good Siarl Dda Charles the Great Siarl Fawr Charter Roll Rhôl Siarter Chartist movement mudiad y Siartwyr Chartist movements mudiad y Siartwyr Cheddar cheese caws Cheddar Cheddar cheeses caws Cheddar Chelsea bun byns Chelsea Chelsea buns byns Chelsea Cheshire cheese caws Caer Cheshire cheeses caws Caer Chief Justice Prif Ustus Child Care Act Deddf Gofal Plant Children's Crusade Croesgad y Plant Chinese block bloc Tsieineaidd Chinese blocks bloc Tsieineaidd Chinese white gwyn Tsieina Chinese whites gwyn Tsieina Christ Crist Christendom Gwledydd Cred Christian Cristion Christian Cristnogol Christian Church Eglwys Gristnogol, yr Christian Court Cwrt Eglwysig Christian Democrat Party Plaid Ddemocrataidd Gristnogol Christian belief cred Gristnogol Christian beliefs cred Gristnogol Christian church eglwys Gristnogol Christian churches eglwys Gristnogol Christian faith ffydd Gristnogol Christian faiths ffydd Gristnogol Christian family teulu Cristnogol Christian heritage etifeddiaeth Gristnogol Christian heritages etifeddiaeth Gristnogol Christian teaching dysgeidiaeth Gristnogol Christian teachings dysgeidiaeth Gristnogol Christianity Cristnogaeth Christmas Nadolig Church in Wales Eglwys yng Nghymru, yr Church of England Eglwys Loegr Cinque Ports Pum Porthladd Cisalpine Republic Gweriniaeth Isalpaidd Cistercian Sistersaidd Cistercian Sistersiad Citizens Advice Bureau Canolfan Gynghori City Technology College Coleg Technegol Dinas (CTC) Civil Code Cod Sifil Civil Law Cyfraith Sifil Close Roll Rhôl Clos Closure Rule Rheol Gaefa Cluniac Order Urdd Cluny Coercion Act Deddf Gorfodaeth Colonial Secretary Ysgrifennydd y Trefedigaethau Combination Act Deddf Cyfuno Cominform Cominfform Commercial Code Cod Masnach Commissions for Sequestration Comisiynwyr yr Atafaeliad Committee for Plundered Ministers Pwyllgor y Gweinidogion Ysbeiliedig Committee for the Propagation of the Gospel Pwyllgor er Taenu'r Efengyl Committee of Accounts Pwyllgor Cyfrifon Committee of Delinquency Pwyllgor Troseddau Committee of Public Safety Pwyllgor Diogelwch y Cyhoedd Common Weal Lles Cyffredin Commonwealth Games Gemau'r Gymanwlad Commonwealth of Independent States Cymanwlad y Gwladwriaethau Annibynnol Communist Party Plaid Gomiwnyddol Community Health Council Cyngor Iechyd Cymdeithas Competition Commission Comisiwn Cystadleuaeth Computer Integrated Manufacture Gweithgynhyrchu drwy Integreiddio Cyfrifiaduron Concert of Europe Cytgord Ewrop Conciliar Movement Mudiad y Cynghorau Confederacy taleithiau Cydffederal (US) Confederation of the Rhine Cydffederasiwn y Rhein Confession of Augsburgh Cyffes Augsburg Confraternity of Christian Doctrine Brawdoliaeth Dysgeidiaeth Gristnogol Confucian Conffiwsaidd Confucian Conffiwsiad Congested Local Board Bwrdd Lleol Gorboblogaeth Congregationalist Annibynnol Congregationalist Annibynnwr Congregations of Christ Cynulleidfaoedd Crist Congregations of Congress Cyfarfodydd Cyngres Congress Party Plaid y Gyngres Congress System Cyfundrefn Gyngresol Congress of Berlin Cyngres Berlin Conservative Party Plaid Geidwadol Conspiracy & Protection of Property Act Deddf Cynllwyn a Diogelu Eiddo Conspiracy of Equals Cynllwyn y Cydraddolion Constantine the Great Cystennin Fawr Consumer Advice Service Gwasanaeth Cynghori Defnyddwyr Consumer Credit Act Deddf Credyd Defnyddwyr Consumer Protection Act 1987 Deddf Gwarchod Defnyddwyr 1987 Consumer Protection Act 1987s Deddf Gwarchod Defnyddwyr 1987 Consumer Protection Department Adran Gwarchod Defnyddwyr Consumer Protection Department Act Deddf Adran Gwarchod Defnyddwyr Continental System System Gyfandirol (1806-12) Control of Substances Hazardous to Health Rheoli Sylweddau sy'n Beryglus i Iechyd Conventigles Act Deddf y Confentiglau Conway Races Campau Conwy Coriolis force grym Coriolis Coriolis forces grym Coriolis Corn Hog Belt Ardal Corn a Moch Corn Law Deddf Ŷd Cornish pasty pastai Gernyw Corporation Act Deddf Corfforaeth Corporations & Municipalities Act Deddf Trefi a Chorfforaethau Corrupt Practices Act Deddf Gweithrediadau Llwgr Cossack Cosac Council for Educational Technology Cyngor Addysg a Thechnoleg Council of Blood Cyngor Gwaedlyd Council of Regency Cyngor y Rhaglywiaeth Council of the North Cyngor y Gogledd Counsel Learned in the Law Cwnsler Dysgedig yn y Gyfraith Count Palatine Cownt Palatin Counter-Remonstrants Gwrth-Haerwyr Coupon Election Etholiad y Cwpon Court of Admiralty Llys y Morlys Court of Appeal Llys Apêl Court of Arches Cwrt y Bwâu Court of Chancery Cwrt Siawnsri Court of Common Pleas Cwrt Pledion Cyffredin Court of Criminal Appeal Llys Apêl Troseddol Court of Exchequer Cwrt y Siecr Court of First Fruits and Tenths Cwrt Anodau a Degawdau Court of General Surveyors Cwrt Archwilwyr Cyffredinol Court of Great Sessions Llys y Sesiwn Fawr Court of High Commission Cwrt yr Uchel Gomisiwn Court of King's Bench Cwrt Mainc y Brenin Court of Petty Sessions Llys Bach Court of Quarter Sessions Llys Chwarter Court of Requests Cwrt y Deisyfion Court of Star Chamber Llys Siambr y Seren Court of Wards & Liveries Cwrt Gward a Lifrai Courts and Legal Services Act Deddf Llysoedd a Gwasanaethau Cyfreithiol Courts of Assize Brawdlys Cowper’s gland chwarren Cowper Cowper’s glands chwarren Cowper Craft Design Technology Crefft Dylunio a Thechnoleg (CDT) Creole Creol (of person) Crete Creta Crimean War Rhyfel y Crimea Criminal Code Cod Troseddol Criminal Law Act Deddf Cyfraith Trosedd Criminal Law Amendment Act Deddf Newid y Gyfraith Trosedd Crimplene Crimplene Crown Court Llys y Goron Crown Prosecution Service Gwasanaeth Erlyn y Goron Crutched Friar Brawd y Groes Cubist Ciwbaidd Cubist Ciwbydd Curia Llys y Pab (papal) Curia Regis Roll Rhôl Llys y Brenin Customary Law Cyfraith Defod Cyrillic alphabet gwyddor Gyrilig Cyrillic alphabets gwyddor Gyrilig Czech crisis argyfwng Tsiecoslofacia D major D fwyaf D majors D fwyaf D minor D leiaf D minors D leiaf D-Day landings glaniadau D-Day Dada Dada Dadaism Dadaiaeth Dainty Davy dance Dawns Dafydd Gain Dainty Davy dances Dawns Dafydd Gain Dalai Lama Dalai Lama Dalit Dalit Dane Daniad Danegeld Treth y Daniaid Danelaw Rhanbarth y Daniaid Danish Danaidd Danish Daneg (language) Dark Ages Oesoedd Tywyll Darwin finch pinc Darwin Darwin finches pinc Darwin Darwinism Darwiniaeth Data Protection Act Deddf Gwarchod Data Day of Atonement Dydd y Cymod Day of Barricades Dydd y Baricedau Day of Dupes Dydd y Twyllo Days of Gladness Dyddiau Llawenydd Debtor's Prison Carchar Dyledwyr Decembrists' Revolt Gwrthryfel y Rhagfyrwyr Declaration of Independence Datganiad Annibyniaeth Declaration of Indulgence Datganiad Pardwn Declaration of Rights Datganiad Iawnderau Declaratory Act Deddf Datganiad Deep South De Eithaf (US) Defence Bonds Bondiau Amddiffyn Defender of the Faith Amddiffynnydd y Ffydd Delegates Court Llys Anfonogion Delft ware crochenwaith Delft Delft wares crochenwaith Delft Democratic Party Plaid Ddemocrataidd Department for Education and Employment Adran Addysg a Chyflogaeth Department of Trade and Industry Adran Diwydiant a Masnach Dewey Decimal System System Ddegol Dewey Dhootie cloth brethyn Dhootie Dhootie cloths brethyn Dhootie Dichloro Diphenyl Trichloroethane DDT Deucloro Deuffenyl Tricloroethan DDT Diet of Worms Diet Worms Diggers Cloddwyr Director of Public Prosecutions Cyfarwyddwr Erlyniadau Cyhoeddus Directory Directoire Disarmament Commission Comisiwn Diarfogi District Health Authority Awdurdod Iechyd Dosbarth (DHA) Divine Right of Kings Dwyfol Hawl Brenhinoedd Divisional Court of the QBD Llys Adrannol Mainc y Frenhines Divisionist Rhaniadwr Diwali Diwali Doctrine of Atonement Athrawiaeth yr Iawn Doctrine of Non-recognition Athrawiaeth Gwrthod Cydnabod Doctrine of Papal Infallibility Athrawiaeth Anffaeledigrwydd y Pab Domesday Book Llyfr Domesday Dominican Dominicaidd Dominican Dominiciad Dominican Order Urdd Sant Dominic Donation of Constantine Rhodd Cystennin Dorian mode modd Doriaidd Dorian modes modd Doriaidd Down's syndrome syndrom Down Down's syndromes syndrom Down Dreikaiserbund Cynghrair y Tri Brenin Dreyfus affair helynt Dreyfus Dreyfus affairs helynt Dreyfus Dual Monarchy Brenhiniaeth Ddeuol Duke of Lancaster Dug Lancaster Duke of York Dug Efrog Dundee cake teisen Dundee Dundee cakes teisen Dundee Durga Durga Durga Puja Durga Puja Dutch Iseldiraidd Dutch Iseldireg (language) Dutch elm disease clefyd llwyfen yr Iseldiroedd Dutch elm diseases clefyd llwyfen yr Iseldiroedd Dutch metal aloi'r Iseldiroedd Dutch metals aloi'r Iseldiroedd Dutchman Iseldirwr E major E fwyaf E majors E fwyaf E minor E leiaf E minors E leiaf EBCDIC code cod EBCDIC EBCDIC codes cod EBCDIC EBP Education Business Partnership PAB Partneriaeth Addysg Busnes Earl Marshall Iarll Farsial Early Bronze Age Oes Efydd Gynnar Early Christian art Celfyddyd Cristnogaeth Gynnar Early Christian arts Celfyddyd Cristnogaeth Gynnar Earth Daear (of planet) East India Company Cwmni India'r Dwyrain Easter Pasg Easter day Sul y Pasg Eastern Europe Dwyrain Ewrop Eastern Question Cwestiwn y Dwyrain Eastern grip gafael y flaen-llaw Eastern grips gafael y flaen-llaw Eastern religions crefyddau’r Dwyrain Ecclesiastical Ordinances Ordinhadau Eglwysig Economic & Social Council Cyngor Economaidd a Chymdeithasol Edict of Emancipation Cyhoeddeb Rhyddfreiniad Edict of Fraternity Cyhoeddeb Brawdgarwch Edict of Restitution Cyhoeddeb Adferiad (1629) Education Act Deddf Addysg Education Reform Act Deddf Diwygio Addysg Education Secretary Ysgrifennydd Addysg Edward the Confessor Edward Gyffeswr Edward the Elder Edward yr Hynaf Edwardian Edwardaidd Edwardian Conquest Goresgyniad Edward Edwardian Settlement Ardrefniant Edward Edwardian era oes Edwardaidd Edwardian eras oes Edwardaidd Egyptian hieroglyphics hieroglyffigau'r Eifftwyr Egyptology Eifftoleg Eightfold Path Llwybr Wythblyg (in Buddhism) Ejection of Scandalous Ministers Act Deddf Diarddel Gweinidogion Gwarthus El Niño El Niño Elector Etholydd (Germany) Elector Archbishop Etholydd Archesgob Elector Palatine Etholydd Palatin Eleven Years Tyranny Gormes yr Un Mlwydd ar Ddeg Elizabeth I Elizabeth I Elizabethan Elisabethaidd Elizabethan Church Settlement Ardrefniant Eglwysig Elizabeth Elizabethan history hanes oes Elizabeth Elohim Elohim Emancipation Act Deddf Rhyddfreinio Emmanuel the Fortunate Emaniwel Ffodus Employers' and Workmen's Act Deddf Cyflogwyr a Gweithwyr Enclosure Acts Deddfau Cau Tiroedd Enclosure of Common Land Act Deddf Cau Tir Comin England regions rhanbarthau Lloegr English Common Law Cyfraith Gwlad Lloegr English Law Cyfraith Loegr English bond bondin Seisnig English bonds bondin Seisnig English garden wall bonding bondin Seisnig wal gardd English garden wall bondings bondin Seisnig wal gardd English horn cor anglais English horns cor anglais English quilting cwiltio Seisnig English suite cyfres Seisnig English suites cyfres Seisnig Enlightenment Goleuo Environmental Health Department Adran Iechyd yr Amgylchedd Environmental Protection Act Deddf Amddiffyn yr Amgylchedd Eocene Ëosen Epiphany Ystwyll Episcopal authority awdurdod Esgobaethol Equity Court Cwrt Ecwiti Equity Law Cyfraith Ecwiti Erasmianism Erasmiaeth Erastianism Erastiaeth Erfurt union undeb Erfurt Erfurt unions undeb Erfurt Espagnole sauce saws Espagnole Espagnole sauces saws Espagnole Estates General Stadau Cyffredinol Ethelred the Unready Ethelred y Digyngor Etruscan art celfyddyd Etrwsgaidd Etruscan arts celfyddyd Etrwsgaidd Eucharist Ewcharist Euclid's algorithm algorithm Ewclid Euclid's algorithms algorithm Ewclid Euclidean Ewclidaidd European Coal & Steel Community Cymuned Glo a Dur Ewrop European Convention on Human Rights Confensiwn Ewropeaidd ar Hawliau Dynol European Free Trade Area Ardal Fasnach Rydd Ewropeaidd European Law Convention on Human Rights Cytundeb Iawnderau Dynol Ewrop European Union Undeb Ewropeaidd European classical tradition traddodiad clasurol Ewropeaidd European classical traditions traddodiad clasurol Ewropeaidd European context cyd-destun Ewropeaidd European contexts cyd-destun Ewropeaidd European dimension dimensiwn Ewropeaidd European dimensions dimensiwn Ewropeaidd European exploration fforio Ewropeaidd European law cyfraith Ewrop European laws cyfraith Ewrop Europeanization Ewropeiddio Eurosize Ewrofaint (cartons) Eurozone Ewrodir Eustachian tube tiwb Eustachio Eustachian tubes tiwb Eustachio Evans' Jig Dawns Ifan Exchequer Court Llys y Siecr Exclusion Act Deddf Gwahardd Exclusion Crisis Argyfwng y Gwahardd Exeter pattern hammer morthwyl patrwm Exeter Exeter pattern hammers morthwyl patrwm Exeter Exile Caethglud (of Jews in Old Testament) Exodus Exodus (book in the Bible) F attachment ymlyniad F (trombone) F attachments ymlyniad F (trombone) F clef cleff F F clefs cleff F F major F fwyaf F majors F fwyaf F minor F leiaf F minors F leiaf Fabian Society Cymdeithas y Ffabiaid Fabianism Ffabiaeth Fablon Fablon Factory Acts Deddfau Ffatri Fair Trading Office Act Deddf Swyddfa Masnachu Teg Fallopian tube tiwb Fallopio Fallopian tubes tiwb Fallopio Family Expenditure Survey Arolwg Gwariant Teulu Family Health Services Authority Awdurdod Gwasanaethau Iechyd Teulu (FHSA) Family Income Supplement Atodiad Incwm Teulu Far East Dwyrain Pell Fascist Italy Yr Eidal Ffasgaidd Fashoda crisis argyfwng Fashoda Feast of Andrew the Apostle Gŵyl Sant Andreas Feast of James the Apostle Gŵyl Iago'r Apostol Feast of John the Apostle Gŵyl Ioan yr Apostol Feast of John the Baptist Gŵyl Ifan Feast of Lucy Gŵyl Lleuan Wyryf Feast of Matthew the Apostle Gŵyl Fathew yr Apostol Feast of Peter and Paul Gŵyl Bedr a Phawl Feast of Pope Calixtus Gŵyl y Pab Calixtus Feast of St Benedict Gŵyl Sant Benedict Feast of St Cecilia Gŵyl Cecilia Wyryf Feast of St David Gŵyl Ddewi Feast of St Denis Gŵyl Sant Denis Feast of St Hilary Gŵyl Sant Hyllar Feast of St Luke the Evangelist Gŵyl Luc Efengylwr Feast of St Martin Gŵyl Sant Martin Feast of St Michael Gŵyl Sant Mihangel Feast of St Patrick Gŵyl Badrig Feast of St Paul Gŵyl Bawl Feast of Stephen the Martyr Gŵyl San Steffan Feast of Thomas the Apostle Gŵyl Tomos yr Apostol Fehlings solution hydoddiant Fehling Fehlings solutions hydoddiant Fehling Fenian Ffeniad Fenian Brotherhood Brawdoliaeth y Ffeniaid Fenian Movement Mudiad y Ffeniaid Ferdinand Fferdinand Fertile Crescent Cilgant Ffrwythlon Field of the Cloth of Gold Maes y Brethyn Euraid Fifth Monarchist Pumed Frenhinwr Fifth Monarchy Pumed Frenhiniaeth Fifth Republic Pumed Weriniaeth Final Solution Ateb Terfynol Fine Roll Rhôl Tâl am Fraint First Fruits and Tenths Act Deddf Blaenffrwyth a Degadau First International Cymdeithas Ryngwladol Gyntaf (Working-Men's Association) First Republic Gweriniaeth Gyntaf First World War Rhyfel Byd Cyntaf Fisher Exact Probability Test Prawf Tebygolrwydd Union Fisher Five Classics Pum Clasur (in Confucianism) Five Mile Act Deddf Pum Milltir Five Pillars of Islam Pum Piler Islam Five Ways Pum Ffordd Flemish bond bondin Ffleminaidd Flemish bonds bondin Ffleminaidd Flemish garden wal bonding bondin Ffleminaidd wal gardd Flemish garden wal bondings bondin Ffleminaidd wal gardd Florentine art celfyddyd Fflorens Florentine arts celfyddyd Fflorens Food & Agriculture Organization Cyfundrefn Fwyd ac Amaeth (FAO) Food and Drugs Act Deddf Bwyd a Chyffuriau Forestry Commission Comisiwn Coedwigaeth Forstner bit ebill Forstner Forstner bits ebill Forstner Forty Two Articles Dwy Erthygl a Deugain Four Freedoms Pedwar Rhyddid Francis Ffransis Franciscan Ffransisgaidd Franciscan Ffransisiad Franciscan Order Urdd Sant Ffransis Franco-Prussian War Rhyfel Ffrainc a Phrwsia Frankish Ffrancaidd Franks Ffranciaid Frederick Ffredric Frederick the Great Ffredric Fawr Free French Ffrancwyr Rhydd Free Will Defence Amddiffyniad Ewyllys Rydd French Revolution Chwyldro Ffrengig French beans ffa Ffrengig French bread bara Ffrengig French breads bara Ffrengig French bun picen Ffrengig French buns picen Ffrengig French chalk sialc Ffrengig French chalks sialc Ffrengig French curve templed tro French curves templed tro French dressing blaslyn Ffrengig French dressings blaslyn Ffrengig French harp organ geg French harps organ geg French horn corn Ffrengig French horn player canwr corn Ffrengig French horn players canwr corn Ffrengig French horns corn Ffrengig French knot cwlwm Ffrengig French knots cwlwm Ffrengig French nail hoelen gron French nails hoelen gron French overture agorawd Ffrengig French overtures agorawd Ffrengig French pitch traw safonol French pitches traw safonol French polish llathrydd Ffrengig French polish finish gorffeniad llathrydd Ffrengig French polish finishs gorffeniad llathrydd Ffrengig French polishs llathrydd Ffrengig French seam sêm Ffrengig French seams sêm Ffrengig French sixth chweched Ffrengig French sixth chord cord y chweched Ffrengig French sixth chords cord y chweched Ffrengig French sixths chweched Ffrengig French suite cyfres Ffrengig French suites cyfres Ffrengig French window ffenestr Ffrengig French windows ffenestr Ffrengig Friendly Society Cymdeithas Gyfeillgar Friends of the Earth Cyfeillion y Ddaear Further Education Unit Uned Addysg Bellach (FEU) Futurists Dyfodolwyr G clef cleff G G clefs cleff G G cramp cramp G G cramps cramp G G major G fwyaf G majors G fwyaf G minor G leiaf G minors G leiaf GCSE Extended Welsh TGAU Cymraeg Estynedig GCSE Extended Welsh Second Language TGAU Cymraeg Ail Iaith Estynedig GEST Grantiau Cefnogi a Hyfforddi Addysg (Grants for Education Support and Training) Gag Acts Deddfau Ffrwyno Galapagos Islands Ynysoedd y Galapagos Galilee Galilea (porch) Gallican Galicanaidd Gallican Galicaniad Gallicanism Galicaniaeth Ganesh / Ganesha / Ganapati Ganesh / Ganesha / Ganapati Gannt chart siart Gannt Gannt charts siart Gannt Gascon Gascon Gemara Gemara General Agreement on Tariffs and Trade Cytundeb Cyffredinol ar Dollau a Masnach (GATT) General Assembly Cynulliad Cyffredinol General Certificate of Secondary Education Tystysgrif Gyffredinol Addysg Uwchradd (GCSE) General National Vocational Qualification Cymhwyster Galwedigaethol Cenedlaethol Cyffredinol (GNVQ) Gentleman at Arms Bonheddwr y Gwarchodlu Gentleman of the Bedchamber Bonheddwr y Siambr Wely Geoffrey of Monmouth Sieffre o Fynwy Georgian Sioraidd Gerald of Wales Gerallt Cymro Geraldines Geraldiaid German Confederation Cydffederasiwn Almaenig German Democratic Republic Gweriniaeth Dwyrain yr Almaen German Empire Ymerodraeth yr Almaen German Federal Republic Gweriniaeth Ffederal yr Almaen German Reformation Diwygiad Protestannaidd yn yr Almaen German ladder ysgol Almaenig German ladders ysgol Almaenig German measles brech Almaenig German offensive ymosodiad yr Almaenwyr German offensives ymosodiad yr Almaenwyr German sixth chweched Almaenig German sixth chord cord y chweched Almaenig German sixth chords cord y chweched Almaenig German sixths chweched Almaenig German suite cyfres Almaenig German suites cyfres Almaenig German unification uno'r Almaen Gestapo Gestapo Ghibelline Gibeliniad Giffen goods nwyddau Giffen Gladstonian liberalism rhyddfrydiaeth Gladstone Gladstonian liberalisms rhyddfrydiaeth Gladstone Glisson's capsule cwpan Glisson Glisson's capsules cwpan Glisson Glorious Revolution Chwyldro Gogoneddus God Duw Gold Standard Safon Aur Golden Age Oes Aur Golden Bull Bwla Aur Golden Fleece Cnu Aur Golden Horde Llu Euraidd Golden Mean Cymedr Euraid Golden Temple Teml Aur Golgi apparatur organigyn Golgi Golgi apparaturs organigyn Golgi Good Friday Dydd Gwener y Groglith Good Parliament Senedd Dda Goodhart's law deddf Goodhart Goodhart's laws deddf Goodhart Gothic Gothig Gothic architecture pensaernïaeth Gothig Gothic architectures pensaernïaeth Gothig Gothic art celfyddyd Gothig Gothic arts celfyddyd Gothig Gothic sculpture cerflunwaith Gothig Gothic sculptures cerflunwaith Gothig Graafian follicle ffoligl Graaf Graafian follicles ffoligl Graaf Grace of Alais Pardwn Alais Gracious Aid Cymhorthdreth Wirfoddol Graeco-Roman Groeg-Rufeinig Grand Alliance Cynghrair Fawr Grand National Consolidated Union Undeb Llafur Unedig Cenedlaethol Grand Pensionary Prif Swyddwr (Netherlands) Grand Remonstrance Gwrthdystiad Mawr Grandees Mawrion, y Great Circle Route Llwybr Cylch Mawr Great Contract Cytundeb Mawr Great Council Cyngor Mawr Great Depression Dirwasgiad Mawr Great Elector Etholydd Mawr Great Exhibition Arddangosfa Fawr Great Fire of London Tân Mawr Llundain Great Leap Forward Naid Fawr Ymlaen (in China) Great Northern War Rhyfel Mawr y Gogledd Great Plague Pla Mawr Great Powers Pwerau Mawrion Great Purges Carthu Mawr Great Schism Sgism Mawr Great Seal Sêl Fawr Great Sessions Sesiwn Fawr Great Society Cymdeithas Fawrfrydig Great Trek Mudo Mawr Grecian harp telyn Roegaidd Grecian harps telyn Roegaidd Greek Groegaidd Greek Orthodox Church Eglwys Uniongred Roegaidd Greek art celfyddyd Groeg Greek arts celfyddyd Groeg Greek cadence diweddeb amen Greek cadences diweddeb amen Greenwich Mean Time Amser Safonol Greenwich Gregorian Gregoraidd Gregorian Calendar Calendr Gregori Gregory Gregori Grey Friar Brawd Llwyd Gross Domestic Product Cynnyrch Mewnwladol Crynswth Gross National Product Cynnyrch Gwladol Crynswth Guild for the Promotion of Welsh Music Urdd er Hyrwyddo Cerddoriaeth yng Nghymru Guinevere Gwenhwyfar Gulf Stream Llif y Gwlff Gunpowder Plot Cynllwyn y Powdwr Gwn Gurdwara Gurdwara Guru Guru (in Sikhism) Guru Granth Sahib Guru Granth Sahib Guy Fawkes Guto Ffowc H-shaped stretcher estynnwr ffurf H H-shaped stretchers estynnwr ffurf H Haber process proses Haber Hadith Hadith Hajj Hajj Hall effect proximity switch switsh agosrwydd effaith Hall Hall effect proximity switches switsh agosrwydd effaith Hall Hall probe chwiliwr Hall Hall probes chwiliwr Hall Hall voltage foltedd Hall Hall voltages foltedd Hall Hamming code cod Hamming Hamming codes cod Hamming Hanoverian succession olyniaeth Hanoferaidd Hanoverian successions olyniaeth Hanoferaidd Hanseatic League Cynghrair Hansa Hansiatic cities dinasoedd Hansa Hapsburg Hapsbwrg Hapsburg Hapsbwrgaidd Hapsburg empire ymerodraeth Hapsbwrgaidd Hapsburg empires ymerodraeth Hapsbwrgaidd Harijan Harijan Harimandir Sahib Harimandir Sahib Haversian canal sianel Havers Haversian canals sianel Havers Haversian space gwagle Havers Haversian spaces gwagle Havers Heads of Proposals Pennau'r Awgrymiadau Health & Morals of Apprentices Act Deddf Iechyd a Moesau Prentisiaid Health And Safety at Work Act Deddf Iechyd a Diogelwch yn y Gwaith Health Education Council Cyngor Addysg Iechyd Health Improvement Programmes Rhaglenni Gwella Iechyd Hebrew Hebraeg (language) Hellenic Helenaidd Helvetic Helfetig Henle's loop dolen Henle Henle's loops dolen Henle Henry Tudor Harri Tudur Henry VII Harri VII Henry VIII Harri VIII Henry the Lion Harri'r Llew Henry the Navigator Harri'r Mordwywr Her Majesty's Inspectorate Arolygiaeth ei Mawrhydi (HMI) Heresy Act Deddf Heresi Hereward the Wake Hereward Effro Hierarchies of Throne Hierarchaethau Gorseddau High Church Uchel Eglwysig High Commission Uchel Gomisiwn High Constable Uchel Gwnstabl High Court Uchel Lys High Sheriff Uchel Siryf Highest Order Urdd Uchaf Highland Clearances Cliriadau'r Ucheldiroedd Highway Code Rheolau'r Ffordd Fawr Hijra Hijra Hindu Hindŵ Hindu Hindŵaidd Hinduism Hindŵaeth His bundle sypyn His His bundles sypyn His Holi Holi Holy Alliance Cynghrair Sanctaidd Holy Office Gwasanaeth Sanctaidd Holy Orders Urddau Eglwysig Holy Places Mannau Cysegredig Holy Roman Emperor Ymerawdwr Rhufeinig Sanctaidd Holy See Pabaeth Holy Sepulchre Beddrod Sanctaidd Holy Spirit Ysbryd Glân Holy Week Wythnos y Pasg Home Guard Gwarchodlu Cartref Hooke's law deddf Hooke Hooke's laws deddf Hooke Host Hostia House of Commons Tŷ'r Cyffredin House of Lancaster Teulu Lancaster House of Lords Tŷ'r Arglwyddi House of Orange Teulu Orange House of Representatives Tŷ'r Cynrychiolwyr House of York Teulu Iorc Hugh the Fat Huw Fras Huguenot Hiwgenot Huguenot Hiwgenotaidd Human Rights Act Deddf Hawliau Dynol Humble Petition and Advice Deiseb a Chyngor Gostyngedig Hundred Years War Rhyfel Can Mlynedd Hungry Forties Pedwardegau Newynog Hussite Husaidd Hussite Husiad HyperCard HyperCard Hypoaeolian mode modd Hypoaeloiaidd Hypoaeolian modes modd Hypoaeloiaidd Hypodorian mode modd Hypodoriaidd Hypodorian modes modd Hypodoriaidd Hypoionian mode modd Hypoioniaidd Hypoionian modes modd Hypoioniaidd Hypolocrian mode modd Hypolocriaidd Hypolocrian modes modd Hypolocriaidd Hypomixolydian mode modd Hypomicsolydiaidd Hypomixolydian modes modd Hypomicsolydiaidd Hypophrygian mode modd Hypophrygiaidd Hypophrygian modes modd Hypophrygiaidd ICT Resources and Software adnoddau a meddalwedd technoleg gwybodaeth a chyfathrebu ICT system system technoleg gwybodaeth a chyfathrebu ICT systems system technoleg gwybodaeth a chyfathrebu ID card cerdyn adnabod ID cards cerdyn adnabod IEEE interface rhyngwyneb IEEE IEEE interfaces rhyngwyneb IEEE INIST initial and in-service training HCMS hyfforddiant cychwynnol ac mewn swydd INIST initial and in-service trainings HCMS hyfforddiant cychwynnol ac mewn swydd INSET in-service training HMS hyfforddiant mewn swydd INSET in-service trainings HMS hyfforddiant mewn swydd IQ testing profi IQ Ice Age Oes Iâ Iceland spar grisial Gwlad yr Iâ Iceland spars grisial Gwlad yr Iâ Icelandic 'low' gwasgedd isel Gwlad yr Iâ Icelandic 'low's gwasgedd isel Gwlad yr Iâ Idea of Progress Syniad o Gynnydd Ik Onkar Ik Onkar Imperial Chamber Siambr Ymerodraeth Imperial Knight Marchog yr Ymerodraeth Imperial Preference Blaenoriaeth i'r Ymerodraeth Imperial unit uned Imperial Imperial units uned Imperial Improvement Commissioners Comisiynwyr Gwelliannau Independent Labour Party Plaid Lafur Annibynnol (ILP) Independent Television Commission Comisiwn Teledu Annibynnol Index Indecs, Yr (Librorum Prohibitorum) India-corn India corn India-corns India corn Indian Empire Ymerodraeth India Indian art celfyddyd India Indian arts celfyddyd India Indian ink inc India Indian inks inc India Indian oilstone carreg hogi India Indian oilstones carreg hogi India Indian raga raga Indiaidd Indian ragas raga Indiaidd Indian red coch India Indian reds coch India Indian summer Haf Bach Mihangel Indian summers Haf Bach Mihangel Indo-Sumerian Indo-Swmeraidd Industrial Revolution Chwyldro Diwydiannol Inland Revenue Cyllid y Wlad Inner London Council Cyngor Llundain Fewnol Inner Temple Ysbyty'r Inner Temple Inns of Court Ysbytai'r Brawdlys Input / Output Mewnbwn / Allbwn (I/O) Inquisitor General Arch-chwilyswr Institute of International Economics Sefydliad Economeg Ryngwladol Instrument of Government Offeryn Llywodraeth International Undeb Rhyngwladol (=L'internationale) International Atomic Energy Agency Asiantaeth Ryngwladol Egni Niwclear International Brigade Brigâd Ryngwladol International Court of Justice Llys Barn Rhyngwladol International Date Line Dyddlinell International Labour Organization Mudiad Llafur Rhyngwladol International Monetary Fund Cronfa Ariannol Ryngwladol International Red Cross Mudiad y Groes Goch Ryngwladol International Refugee Organization Cyfundrefn Ryngwladol y Ffoaduriaid International Standards Organization Cyfundrefn Safonau Rhyngwladol International Trade Commission Comisiwn Masnach Ryngwladol Interpretation Act 1978 Deddf Dehongliad 1978 Interpretation Act 1978s Deddf Dehongliad 1978 Investiture Contest Ymryson yr Arwisgo Investors in People Buddsoddwyr mewn Pobl Investors in People award gwobr Buddsoddwyr mewn Pobl Ionian mode modd Ionaidd Ionian modes modd Ionaidd Irenaean theodicy theodiciaeth Irenaeus Irish Gwyddel (person) Irish Question Pwnc Iwerddon Irish Sea Môr Iwerddon Irish harp telyn Wyddelig Irish harps telyn Wyddelig Iron Age Oes Haearn Iron Curtain Llen Haearn Irwin twist bit ebill tro Irwin Irwin twist bits ebill tro Irwin Islam Islam Islamic Islamaidd Islamic calligraphy caligraffeg Islamaidd Islamic law cyfraith Islamaidd Islamic laws cyfraith Islamaidd Islamic state gwladwriaeth Islamaidd Islamic states gwladwriaeth Islamaidd Israelite Israeliad Italian overture agorawd Eidalaidd Italian overtures agorawd Eidalaidd Italian painting paentiad Eidalaidd (of painted picture) Italian painting peintio Eidalaidd (of process or art) Italian paintings paentiad Eidalaidd (of painted picture) Italian quilting cwiltio Eidalaidd Italian serenade serenâd Eidalaidd Italian serenades serenâd Eidalaidd Italian sixth chweched Eidalaidd Italian sixth chord cord y chweched Eidalaidd Italian sixth chords cord y chweched Eidalaidd Italian sixths chweched Eidalaidd Italian unification uno'r Eidal Ivan the Great Ifan Fawr Ivan the Terrible Ifan Arswydus J curve effect effaith cromlin J J curve effects effaith cromlin J Jacob chuck crafanc Jacob Jacob chucks crafanc Jacob Jacobean Jacobeaidd Jacobean couching cowtsio Jacobeaidd Jacobin Jacobin Jacobin Jacobinaidd Jacobinism Jacobiniaeth Jacquard weave gwehyddiad Jacquard Jacquard weaves gwehyddiad Jacquard James Iago (king) Janam Sakhis Janam Sakhis Jansenism Janseniaeth Jansenist Jansenydd Japanese Japaneaidd Japanese print print Japaneaidd Japanese prints print Japaneaidd Japanese school ysgol Japaneaidd Japanese schools ysgol Japaneaidd Japji Japji Jarrow Crusade Crwsâd Jarrow Jennings twist bit ebill tro Jennings Jennings twist bits ebill tro Jennings Jerusalem artichoke artisiog Jerwsalem Jerusalem artichokes artisiog Jerwsalem Jesuit Jeswit Jesuit Jeswitaidd Jesuit Order Urdd y Jeswitiaid Jesuitism Jeswitiaeth Jesus Christ Iesu Grist Jewish Easter Pasg yr Iddewon Joan Siwan (wife of Llywelyn the Great) Joan of Arc Jeanne d'Arc Job Centre Canolfan Gwaith Job Control Language Iaith Rheoli Gorchwylion (JCL) Johansson's block bloc Johansson Johansson's blocks bloc Johansson John Ioan (pope) John John (king) Josephson junction cyswllt Josephson Josephson junctions cyswllt Josephson Judaism Iddewiaeth Judgement Day Dydd y Farn Judicature Acts Deddfau Barnweiniad Judicial Committee of the Privy Council Pwyllgor Barnwrol y Cyfrin Gyngor Julian Calendar Calendr Julius Julius Caesar Iŵl Cesar July Monarchy Brenhiniaeth Gorffennaf July Plot Cynllwyn Gorffennaf June days dyddiau Mehefin Junker Junker Jupiter Iau Justice of the Peace Ynad Heddwch (J.P.) Jutes Jiwtiaid Kali Kali Kamares ware crochenwaith Kamares Kamares wares crochenwaith Kamares Kangha Kangha Karah Prashad / Prasad Karah Prashad / Prasad Kathina Kathina Keeper of the Rolls Ceidwad y Rholiau Keeper of the Seals Ceidwad y Seliau Kett rebellion gwrthryfel Kett Kett rebellions gwrthryfel Kett Keynesian Keynesiad (of person) Khalsa Khalsa Kharijite views syniadau'r Kharijitiaid Kids' Club Clwb Plant Kids' Club Leader Arweinydd Clybiau Plant King Consort Brenin Cydweddog King's Evil Haint y Brenin King's Peace Heddwch y Brenin Kingdom of the Two Sicilies Teyrnas y Ddwy Sisilia Kirchoff's first law deddf gyntaf Kirchoff Kirchoff's first laws deddf gyntaf Kirchoff Kirpan Kirpan Kitemark Nod Barcut Klangforme seinwedd Knight Hospitaller Marchog Ysbytaidd Knight Templar Marchog Temlaidd Knight Teutonic Marchog Tiwtonig Knight of the Shire Marchog Sir Knights' War Rhyfel y Marchogion Krebs cycle cylchred fetabolaidd Krebs Krebs cycles cylchred fetabolaidd Krebs Krishna / Krsna Krishna / Krsna Kruger telegram telegram Kruger Kruger telegrams telegram Kruger Kshatriya / Ksatriya Kshatriya / Ksatriya Kupffer cell cell Kupffer Kupffer cells cell Kupffer LEA local education authority AALL awdurdod addysg lleol Labour Party Plaid Lafur Lady chapel capel y Forwyn Lady chapels capel y Forwyn Lady of the Bedchamber Boneddiges y Siambr Wely Laffer curve cromlin Laffer Laffer curves cromlin Laffer Lake District Ardal y Llynnoedd Lakshmi / Laxmi Lakshmi / Laxmi Lancashire cheese caws Swydd Gaerhirfryn Lancashire cheeses caws Swydd Gaerhirfryn Lancastrian Lancastraidd Lancastrian Lancastrydd Lancelot Lawnslot Land Use Survey Arolwg Defnydd Tir (LUS) Late Bronze Age Oes Efydd Ddiweddar Lateran Council Cyngor Lateran Lateran Pacts Cytundebau Lateran Latin Lladin Latin Christendom Gwledydd Cred Rhufeinig Latin quarter rhan Ladinaidd Latin quarters rhan Ladinaidd League of Armed Neutrality Cynghrair Niwtral Arfog League of Nations Cynghrair y Cenhedloedd Lease-Lend Act Deddf Les-Fenthyg Leasehold Reform Act Deddf Diwygio Cyfraith Prydlesi Legion of Honour Lleng Anrhydedd Lent Grawys Lenz's law deddf Lenz Lenz's laws deddf Lenz Levant Company Cwmni'r Lefant Leveller Lefelwr Liberal Democrat Party Plaid y Democratiaid Rhyddfrydol Liberal Party Plaid Ryddfrydol Liberal Unionist Rhyddfrydwr Unoliaethol Liberate Roll Rhôl Pensiwn a Lwfans Licensing Acts Deddfau Trwyddedu Little Hans Hans Fychan Llandaff Reel Dawns Llandaf Llanover Reel Dawns Llanofer Locrian mode modd Locriaidd Locrian modes modd Locriaidd Lollard Lolard Lollard Lolardaidd Lollardy Lolardiaeth London Corresponding Society Cymdeithas Ohebu Llundain London pattern hammer morthwyl patrwm Llundain London pattern hammers morthwyl patrwm Llundain Londoner Llundeiniwr Long March Ymdaith Faith Lord Advocate Arglwydd Adfocad Lord Chancellor Arglwydd Ganghellor Lord Chief Justice Arglwydd Brif Ustus Lord High Admiral Arglwydd Uchel Lyngesydd Lord High Treasurer Arglwydd Uchel Drysorydd Lord Keeper Arglwydd Geidwad Lord Keeper of the Great Seal Arglwydd Geidwad y Sêl Fawr Lord Lieutenant Arglwydd Raglaw Lord Mayor Arglwydd Faer Lord Penrhyn Arglwydd Penrhyn, Yr Lord President Arglwydd Lywydd Lord Protector Arglwydd Amddiffynnydd Lord Shiva Arglwydd Shiva, Yr Lord's Supper Swper yr Arglwydd Lords Marcher Arglwyddi'r Gororau Lords Ordainers Arglwyddi Ordeinwyr Lords Temporal and Spiritual Arglwyddi Lleyg ac Eglwysig Lords of the Congregation Arglwyddi'r Gynulleidfa Lorenzo the Magnificent Lorenzo Ysblennydd Lotus Sutra Lotus Sutra Louis the Pious Louis Dduwiol Low Church Isel Eglwysig Luddite Ludaidd Luddite Ludiad Luminarists Goleueddwyr Lurex Lurex Lutheran Lutheraidd Lutheran Lutheriad Lutheranism Lutheriaeth Ländler Ländler Ländlers Ländler Madinah Madinah Maginot Line Llinell Maginot Magna Carta Magna Carta Magnus Maximus Macsen Wledig Mahabharata Mahabharata Mahayana Mahayana Mahayana Buddhism Bwdhaeth Mahayana Maid of Kent Morwyn Caint Makkah Makkah Malpighian body corffyn Malpighi Malpighian corpuscle corffilyn Malpighi Malpighian corpuscles corffilyn Malpighi Malpighian layer haen Malpighi Malpighian layers haen Malpighi Malpighian tubule tiwbyn Malpighi Malpighian tubules tiwbyn Malpighi Malthusianism Malthwsiaeth Manpower Services Commission Comisiwn Gwasanaethau'r Gweithlu March on Rome Ymdaith i Rufain Marches Mers Marian Marïaidd Marian exiles alltudion Mari Marian martyrs merthyron Mari Marian persecution erledigaeth Mari Marian persecutions erledigaeth Mari Maritime Code Cod y Môr Mars Mawrth Marshall-Lerner condition amod Marshall-Lerner Marshall-Lerner conditions amod Marshall-Lerner Marxism Marcsaeth Marxist Marcsaidd Marxist Marcsydd Mary Stuart Mari Stiwart Mashiach Meseia Maslow’s hierarchy of needs hierarchaeth anghenion Maslow Massacre of St Bartholomew Cyflafan Gwylnos Bartholomeus Massacre of the Sicilian Vespers Cyflafan y Gosberau Sisilaidd Mastersinger Meistersinger Maundy Thursday Dydd Iau Cablyd Mayor of the Palace Maer y Llys McCarthyism McCarthiaeth Mean Information Field Maes Gwybodaeth Gymedrig (MIF) Medical Officer of Health Prif Swyddog Iechyd Mediterranean Mediteranaidd Mediterranean scrub prysgwydd rhanbarth Môr y Canoldir Mediterranean woodland coetir Môr y Canoldir Mediterranean woodlands coetir Môr y Canoldir Megillah Megillah Melanesian Melanesaidd Melanesian art celfyddyd Felanesaidd Melanesian arts celfyddyd Felanesaidd Member of Parliament Aelod Seneddol (MP) Mendelian Mendelaidd Mendelian inheritance etifeddiad Mendelaidd Mendelian inheritances etifeddiad Mendelaidd Menshevik Mensiefig Menshevik Mensiefigaidd Mental Health Act Deddf Iechyd Meddwl Merchant Adventurers Mentrwyr Masnachol Merchant Shipping Act Deddf Llongau Masnach Merciless Parliament Senedd Ddidostur Mercury Mercher Merlin Myrddin Merovingian Merofingaidd Merseyside Glannau Merswy Merthyr rising terfysg Merthyr Merthyr risings terfysg Merthyr Messiah Meseia Metasoa Metasoa Methodism Methodistiaeth Methodist Methodist Methodist Methodistaidd Metropolitan Police Act Deddf Heddlu Metropolitan Microelectronic Education Programme Rhaglen Addysg Microelectroneg (MEP) Microtex llestri Microtex Middle Ages Oesoedd Canol Middle East Dwyrain Canol Midlands Canolbarth Lloegr Midrash Midrash Milk Marketing Board Bwrdd Marchnata Llaeth Milky Way Llwybr Llaethog Millenary Petition Deiseb y Fil Millon's Reagent Adweithydd Millon Mines Act Deddf Mwyngloddiau Minister for Education Gweinidog Addysg Minister of State Gweinidog Gwladol Minister of State for Wales Gweinidog Gwladol dros Gymru Ministry of Defence range maes tanio'r Weinyddiaeth Amddiffyn Minoan Minoaidd Minoan art celfyddyd Finoaidd Minoan arts celfyddyd Finoaidd Mishnah Mishnah Misuse of Drugs Act Deddf Camddefnydd Cyffuriau Mithraism Mithraeth Monel Monel Monetary Policy Committee Pwyllgor Polisi Ariannol Monroe Doctrine Athrawiaeth Monroe Montessori school ysgol Montessori Montessori schools ysgol Montessori Mool / Mul Mantar Mool / Mul Mantar Moor Mŵr Moorish Mwraidd Mormon Mormon Mormon Mormonaidd Moroccan crisis argyfwng Moroco Morse drill dril Morse Morse drills dril Morse Morse taper tapr Morse Morse tapers tapr Morse Mother of God Mam Duw Mu'tazilite views syniadau'r Mu'tazilitiaid Muhammad Muhammad Municipal Corporations Act Deddf Corfforaethau Trefol Munro's foramen fforamen Munro Munro's foramens fforamen Munro Muntz metal metel Muntz Muntz metals metel Muntz Muscovite Moscofaidd Muscovite Moscofwr Muslim Mwslim Muslim Mwslimaidd Muslim theology diwinyddiaeth Fwslimaidd Muster Roll Rhôl Fwstro Mutiny Act Deddf Miwtini Mu’tazili Mu’tazilitiad Mu’tazilis Mu’tazilitiad Müllerian duct dwythell Müller Müllerian ducts dwythell Müller N-stage N-cam N-stages N-cam N-terminal analysis dadansoddiad N-terfynol NAB National Advisory Body for Higher Education in the Public Sector CYC Corff Ymgynghorol Cenedlaethol ar gyfer Addysg Uwch yn y Sector Cyhoeddus NAND NIAC NAND gate adwy NIAC NAND gates adwy NIAC NLQ ansawdd llythyr (near letter quality) NROVA National Record of Vocational Achievement Cofnod Cenedlaethol Cyrhaeddiad Galwedigaethol NVQ National Vocational Qualification CGC Cymhwyster Galwedigaethol Cenedlaethol NVQ framework fframwaith CGC NVQ frameworks fframwaith CGC Nam Simaran Nam Simaran Naples yellow melyn Napoli Naples yellows melyn Napoli Napoleonic Code Cod Napoleon Nashim Nashim National Assembly Cynulliad Cenedlaethol National Assistance Cymorth Gwladol National Curriculum Council Cyngor y Cwricwlwm Cenedlaethol (NCC) National Foundation for Education Research Sefydliad Cenedlaethol ar gyfer Ymchwil mewn Addysg (NFER) National Government Llywodraeth Genedlaethol National Guard Gwarchodlu Cenedlaethol (US) National Health Insurance Act Deddf Yswiriant Iechyd Gwladol National Health Service Gwasanaeth Iechyd Gwladol (NHS) National Insurance Yswiriant Gwladol National Insurance Act Deddf Yswiriant Gwladol National Political Union Undeb Gwleidyddol Cenedlaethol National Savings Cynilion Gwladol National School Ysgol Genedlaethol National Trust Ymddiriedolaeth Genedlaethol National Unemployment Insurance Act Deddf Yswiriant y Di-waith National Union of Students Undeb Cenedlaethol y Myfyrwyr Nationalist Party Plaid Genedlaethol Natural Theology Diwinyddiaeth Natur Nature Conservancy Council Cyngor Gwarchod Natur Navigation Act Deddf Mordwyo Nazi Natsi Nazi Natsïaidd Nazi Germany Almaen Natsïaidd Nazi Party Plaid Natsïaidd Nazi political system cyfundrefn wleidyddol y Natsïaid Nazi political systems cyfundrefn wleidyddol y Natsïaid Nazify Natsïeiddio Near East Dwyrain Agos Neptune Neifion New Deal Bargen Newydd New Deal Policy Polisi'r Fargen Newydd New Economic Policy Polisi Economaidd Newydd New Learning Dysg Newydd New Model Army Byddin Model Newydd New Stone Age Oes Neolithig New Testament Testament Newydd New World Byd Newydd New Year Blwyddyn Newydd Newall limits terfannau Newall Newton's laws of motion deddfau mudiant Newton Newton-Raphson formula fformiwla Newton-Raphson Newton-Raphson formulas fformiwla Newton-Raphson Nezikin Nezikin Nichiren Buddhism Bwdhaeth Nichiren Ninety Five Theses Naw Deg a Phum Pwnc (of Luther) Nissl granules gronynnau Nissl Nordic Llychlynnaidd Norfolk Crop Rotation Cylchdro Cnydau Norfolk Norman Norman (of person) Norman Normanaidd Norman castle castell Normanaidd Norman castles castell Normanaidd Norman conquest concwest Normanaidd Norman conquests concwest Normanaidd Norman-French Ffrangeg Normanaidd (language) Norman-French Ffrengig Normanaidd Normanisation Normaneiddio Norse Llychlynnaidd Norse Norseg (language) Norseman Llychlynnwr North Atlantic Drift Drifft Gogledd Iwerydd North Atlantic Treaty Organization Cyfundrefn Cytundeb Gogledd Iwerydd (NATO) North German Confederation Cydffederasiwn Gogledd yr Almaen North-East Passage Tramwyfa'r Gogledd-Ddwyrain North-West Passage Tramwyfa'r Gogledd-Orllewin Norway spruce pyrwydden Norwy Norway spruces pyrwydden Norwy Nuclear Test Ban Treaty Cytundeb Atal Profion Niwclear OMR form ffurflen DMG OMR forms ffurflen DMG OMR optical mark reader DMG darllenydd marciau gweladwy OMR optical mark readers DMG darllenydd marciau gweladwy OOPS OOPS (Object Orientated Programming System) Obligations Court Cwrt Ymrwymiadau Observant Cadwrydd Occasional Conformity Act Deddf Cydymffurfio Achlysurol Of Noble Race was Shenkin O Uchel Dras oedd Siencyn Ofcom Ofcom (Office of Communications) Offa's Dyke Clawdd Offa Offences Against the Person Act Deddf Troseddau yn Erbyn Person Office for Standards in Education Swyddfa Safonau mewn Addysg (OFSTED) Office of Fair Trading Swyddfa Masnachu Teg Office of Her Majesty's Chief Inspector Swyddfa Prif Arolygydd ei Mawrhydi (OHMCI) Officer of the Royal Court Swyddog Llys y Brenin Official Secrets Act Deddf Cyfrinachau Swyddogol Ohm's law deddf Ohm Ohm's laws deddf Ohm Old Age Pensions Act Deddf Pensiwn yr Henoed Old Norse Hen Norseg Old Stone Age Hen Oes y Cerrig Old Testament Hen Destament Old Testament prophetic literature llenyddiaeth broffwydol yr Hen Destament Old Testament prophetic literatures llenyddiaeth broffwydol yr Hen Destament Old World Yr Hen Fyd Olympic Games Gemau Olympaidd Open College Coleg Agored Open University Prifysgol Agored Option Mortgage Scheme Cynllun Morgais Dewisol Orange Order Urdd Oren Orangeman Orenwr Oratory of Divine Love Oratori'r Cariad Dwyfol Order of the Day Trefn y Dydd Order of the Garter Urdd y Gardys Orders in Council Gorchmynion y Cyfrin Gyngor Ordnance Bench Mark Meincnod Ordnans (OBM) Ordnance Survey Arolwg Ordnans Ordnance Survey map map Ordnans Ordnance Survey maps map Ordnans Ordovician Ordoficaidd Organization of Africa Unity Cyfundrefn Undod Affrica Organization of American States Cyfundrefn Gwledydd America Orthodox Jew Iddew Uniongred Ostwald theory theori Ostwald Oswestry Croesoswallt Oswestry Wake Dawns Croesoswallt Ottoman Otoman Ottoman Otomanaidd Ottoman Empire Ymerodraeth Otomanaidd Ottoman Turk Twrciad Otomanaidd Owenism Oweniaeth Owenite Owenaidd Owenite Owenydd P.B. silimanite silimanit P.B. P.B. silimanites silimanit P.B. P.C.R. radiws pitsh cylch (pitch circle radius) P.C.R.s radiws pitsh cylch (pitch circle radius) PAYE Talu wrth Ennill PP number publications cyhoeddiadau rhif PP PVA PVA PVC PVC (polyvinyl chloride) Pacinian corpuscle corffilyn Pacini Pacinian corpuscles corffilyn Pacini Pact of Steel Cytundeb Dur Palatine Earl Iarll Palatin Palatine of the Rhine Etholaeth Balatin y Rhein Pale Rhanbarth Seisnig (Ireland) Paleocene cyfnod Paleosen Palestine Liberation Organization Mudiad Rhyddid Palesteina Pali Canon Canon Pali Palm Sunday Sul y Blodau Panj Kakka Panj Kakka Panth Panth Papal Schism Sgism y Babaeth Papal States Tiroedd y Babaeth Pareto efficiency effeithlonrwydd Pareto Paris Peace Conference Cynhadledd Heddwch Paris Paris binding rhwymyn Paris Paris bindings rhwymyn Paris Parliament Act Deddf y Senedd Parliamentary Reform Act Deddf Diwygio'r Senedd Parvati Parvati Passion Dioddefaint (of Christ) Passion music cerddoriaeth y Dioddefaint Passion musics cerddoriaeth y Dioddefaint Passover Pasg Iddewig Pasteur effect effaith Pasteur Pasteur effects effaith Pasteur Patent Roll Rhôl Patent Patient's Charter Siarter y Claf Patimokkha Patimokkha Patriarchal Narratives Hanesion Patriarchaidd Pauli exclusion principle egwyddor wahardd Pauli Pauli exclusion principles egwyddor wahardd Pauli Paulinus Pawl Hen Pay As You Earn Talu Wrth Ennill Payne's blue glas Payne Payne's blues glas Payne Payne's grey llwyd Payne Peasants' Revolt Gwrthryfel y Werin Peasants' War Rhyfel y Werin Pekingese stitch pwyth Pekin Pekingese stitches pwyth Pekin Penal Code Cod Penyd Penny Black stamp du ceiniog Penrhyn lockouts argyfyngau cau allan y Penrhyn Pentecost Pentecost Pentecostal Pentecostal Pentecostal Pentecostalaidd People's Charter Siarter y Bobl Permian Permaidd Peruvian coast arfordir Periw Peruvian coasts arfordir Periw Peter Pan collar coler Peter Pan Peter Pan collars coler Peter Pan Peter Scot Ceiniogau'r Pab Peter the Great Pedr Fawr Peter the Hermit Pedr Feudwy Peter's Pence Ceiniogau Pedr Petition of Right Deiseb Iawnderau Petri dish dysgl Petri Petri dishs dysgl Petri Petty Constable Is-Gwnstabl Philip Augustus Philip Awgwstws Philip the Fair Philip Deg Philip the Handsome Philip Olygus Phillips curve cromlin Phillips Phillips curves cromlin Phillips Phillips screwdriver tyrnsgriw Phillips Phillips screwdrivers tyrnsgriw Phillips Phoney War Rhyfel Ffug Phrygian Phrygiaidd Piepowder Court Cwrt Marchnad Pilgrim Fathers Tadau Pererin Pilgrim Festivals Gwyliau'r Pererinion Pipe Roll Rhôl Siecr Plaid Cymru Plaid Cymru Pleistocene Pleistosen Pluto Plwton PoS programme of study RhA rhaglen astudio Poet Laureate Bardd y Brenin Poisson distribution dosraniad Poisson Poisson distributions dosraniad Poisson Police and Criminal Evidence Act Deddf Heddlu a Thystiolaeth Droseddol Polish Corridor Coridor Pwylaidd Poor Law Amendment Act Deddf Newydd y Tlodion Popish Plot Cynllwyn Pabaidd Portland cement sment Portland Portland cements sment Portland Portuguese Portiwgaleg (language) Portuguese Portiwgalydd (person) Post Graduate Certificate of Education Tystysgrif Addysg i Raddedigion (PGCE) Post Office box blwch Swyddfa'r Post Post Office boxes blwch Swyddfa'r Post Pozidrive screw sgriw Pozidrive Pozidrive screwdriver tyrnsgriw Pozidrive Pozidrive screwdrivers tyrnsgriw Pozidrive Pozidrive screws sgriw Pozidrive Pragmatic Sanction Datganiad Pragmatig Pre-Raphaelite Cyn-Raffaelaidd Pre-Raphaelite Cyn-Raffaeliad Pre-Raphaelite Brotherhood Brawdoliaeth y Cyn-Raffaeliaid Premium Bond Bond Premiwm Premonstratensians Canoniaid Premonstratensiaidd Prerogative Court Llys Uchelfraint Presbyterian Presbyteraidd Presbyterian Presbyteriad Press Complaints Commission Comisiwn Cwynion y Wasg Prices Act Deddf Prisiau Primitive Methodism Methodistiaeth Gyntefig Prince Consort Tywysog Cydweddog Prince Elector Etholydd Tywysogol Prince Regent Rhaglyw Dywysog Princess Elizabeth's Fancy Ffansi Lisa Principal Component Analysis Dadansoddiad Prif Gydrannau Privy Chamber Siambr Gyfrin Privy Council Cyfrin Gyngor Privy Purse Pwrs Cyfrin Privy Seal Sêl Gyfrin Probate Court Llys Profiant Process Theology Diwinyddiaeth Proses Programme Evaluation and Review Technique Techneg Gwerthuso ac Adolygu Rhaglen (PERT) Propagation of the Gospel Taenu'r Efengyl Protection of Sea Life Act Deddf Gwarchod Bywyd y Môr Protestant Protestannaidd Protestant Protestant Protestant Ascendancy Goruchafiaeth Brotestannaidd Protestant Reformation Diwygiad Protestannaidd Protestant Succession Olyniaeth Brotestannaidd Protestant denomination enwad Protestannaidd Protestant denominations enwad Protestannaidd Protestant establishment sefydliad Protestannaidd Protestant establishments sefydliad Protestannaidd Protestant settlement ardrefniant Protestannaidd Protestant settlements ardrefniant Protestannaidd Protestantism Protestaniaeth Provençal Profensaidd Provençal Profensaleg (language) Provençal Profenswr (person) Provençals Profensaleg (language) Provençals Profenswr (person) Provisions of Clarendon Gosodiadau Clarendon Provisions of Oxford Gosodiadau Rhydychen Provisions of Westminster Gosodiadau San Steffan Provisors Act Deddf Atal Enwebu Prussian Prwsiad Prussian Prwsiaidd Prussian blue glas Prwsia Prussian blues glas Prwsia Public Health Act Deddf Iechyd Cyhoeddus Public Record Office Archifdy Gwladol Pure Land Tir Pur Puritan Choir Carfan Biwritanaidd Puritan Revolution Chwyldro Piwritanaidd Pyrex ware llestri Pyrex Pyroceram llestri Pyroceram Pyrocil llestri Pyrocil Pythagoras Pythagoras Pythagoras theorem theorem Pythagoras Pythagoras theorems theorem Pythagoras QWERTY keyboard bysellfwrdd QWERTY QWERTY keyboards bysellfwrdd QWERTY Quaker Crynwr Quakerism Crynwriaeth Quarter Sessions Llys Chwarter Queen Consort Brenhines Gydweddog Queen's Bench Division Adran Mainc y Frenhines Qur'an Qur'an Qur'ans Qur'an R.P.M. cylchdroeon y funud (revolutions per minute) Rabbinical Judaism Iddewiaeth Rabbinaidd Race Relations Act Deddf Cysylltiadau Hiliol Radha Radha Rama Rama Ramadan Ramadan Ramayana Ramayana Rastafarian Rastaffariad Rastafarianism Rastaffariaeth Rational Dissenter anghydffurfiwr rhesymol Rebecca riots terfysgoedd Beca Receiver General Rhysyfwr Cyffredinol Reciprocity of Duties Act Deddf Cydbwyso Tollau Reform Act Deddf Ddiwygio Reform Bill Mesur Diwygio Reform Bill Crisis Argyfwng y Mesur Diwygio Reform Jew Iddew Diwygiedig Reformation Diwygiad Protestannaidd Registry Office Swyddfa Gofrestru Reich Concordat Concordat y Reich Reichstag Fire Tân y Reichstag Reinsurance Treaty Cytundeb Ailyswirio Remembrance Day Dydd y Cofio Renaissance Dadeni Rent Act Deddf Rhenti Representation of the People Act Deddf Cynrychiolaeth y Bobl Republican Party Plaid Weriniaethol Resistance Byddin Gêl (in France, World War II) Reverse Polish Notation Nodiant Cil-Bwyl Revolt of the Camisards Gwrthryfel y Camisardiaid Richard the Lionheart Rhisiart Lewgalon Right Ascension Esgyniad Cywir (RA) Ringers solution hydoddiant Ringer Ringers solutions hydoddiant Ringer Riot Act Deddf Terfysg Roman Rhufeinig Roman Rhufeinwr Roman Catholic Church Eglwys Babyddol Roman Church Eglwys Rufain Roman Empire Ymerodraeth Rufeinig Roman Inquisition Chwilys Rhufain Roman Law Cyfraith Rufain Roman alphabet gwyddor Rufeinig Roman alphabets gwyddor Rufeinig Roman town house tŷ tref Rhufeinig Roman town houses tŷ tref Rhufeinig Romanism Pabyddiaeth Romanization Rhufeinio Romanize Rhufeinio Romantic period cyfnod Rhamantaidd Romantic periods cyfnod Rhamantaidd Rome Scot Ceiniogau'r Pab Root & Branch Petition Deiseb Wreiddyn a Changen Roundhead Pengrynwr Royal Academy of Arts,The Academi Frenhinol y Celfyddydau Royal Cambrian Academy of Arts Academi Gelf Frenhinol Cymru Royal Society of Mines Cymdeithas Frenhinol y Mwyngloddiau Rump Parliament Senedd y Gweddill Russification Rwsianeiddio SACRE Standing Advisory Council for Religious Education CYSAG Cyngor Ymgynghorol Sefydlog Addysg Grefyddol SCAA School Curriculum and Assessment Authority ACAY Awdurdod Cwricwlwm ac Asesu Ysgolion SDP-Liberal Alliance Cynghrair y Rhyddfrydwyr a'r Democratiaid Cymdeithasol SEAC School Examinations and Assessment Council CAAY Cyngor Arholiadau ac Asesu Ysgolion SI unit uned SI SI units uned SI Sabath Shabbat (in technical Jewish usage) Sabbatarianism Sabathyddiaeth Sabbath Sabath (Jewish) Sack of Rome Anrhaith Rhufain Saint Augustine Awstin Sant Saint David's Day Dydd Gŵyl Dewi Saint George's Channel Sianel San Siôr Saint James Sant Iago Saint John Sant Ioan Saint Patrick Sant Padrig Salab Salab Sale of Goods Act Deddf Gwerthu Nwyddau Salic Law Cyfraith Salig Salvation Army Byddin yr Iachawdwriaeth Salvationist aelod o Fyddin yr Iachawdwriaeth Sangha Sangha Saracen Sarasen Sat Nam Sat Nam Saturn Sadwrn Sawm Sawm Saxon Sacson Saxon Sacsonaidd Saxon place name enw lle Sacsonaidd Saxon place names enw lle Sacsonaidd Scandinavian Union Undeb Llychlyn Schism Act Deddf Sgism Schlieffen Plan Cynllun Schlieffen Schmalkaldic League Cynghrair Schmalkalden Schmitt Trigger Triger Schmitt Schmitt inverter gwrthdröydd Schmitt Schmitt inverters gwrthdröydd Schmitt Schumpeter's theory of creative destruction damcaniaeth distryw creadigol Schumpeter Schwann cell cell Schwann Schwann cells cell Schwann Scientific Revolution Chwyldro Gwyddonol Scotch Baptist Bedyddiwr Albanaidd Scotch Cattle Teirw Scotch Scotch glue glud Scotch Scotch glues glud Scotch Scotch snap clec Sgotaidd Scotch snaps clec Sgotaidd Scramble for Africa Ymgiprys am Affrica Sea Beggars Cardotwyr y Môr Second Socialist International Working-Men's Association Ail Gymdeithas Sosialaidd Ryngwladol y Gweithwyr Second World War Ail Ryfel Byd Secret Ballot Act Deddf y Bleidlais Gudd Secretary of State for Education Ysgrifennydd Gwladol dros Addysg Secretary of State for Wales Ysgrifennydd Gwladol Cymru Security Council Cyngor Diogelwch Seditious Meetings Act Deddf Cyfarfodydd Terfysglyd Seditious Publications Act Deddf Cyhoeddiadau Terfysglyd Seger cone côn Seger Seger cones côn Seger Selective Employment Tax Treth Gyflogi Dethol (SET) Self-Denying Ordinance Deddf Hunanymwadiad Semitism Semitiaeth Septennial Act Deddf Seithmlwydd Severn bore eger Hafren Severn bores eger Hafren Sex Discrimination Act Deddf Gwahaniaethu ar Sail Rhyw Sex Disqualification Removal Act 1919 Deddf Dileu Anghymwysterau Rhyw 1919 Sex Disqualification Removal Act 1919s Deddf Dileu Anghymwysterau Rhyw 1919 Shahadah Shahadah Shaivism / Śaivism Shaiviaeth / Śaiviaeth Shaivism / Śaivisms Shaiviaeth / Śaiviaeth Shaker Siglwr Shari'ah Shari'ah Shari'ahs Shari'ah Shavuot Shavuot Sheffield plate arian Sheffield Sheriff's Tourn Llys y Siryf Shi'ah Shi'ah Shi'ahs Shi'ah Shimbel Index Indecs Shimbel Ship Money Treth Longau Shiva / Śiva Shiva / Śiva Shiva / Śivas Shiva / Śiva Shiva Nataraja Shiva Nataraja Shudra / Śudra Shudra / Śudra Shudra / Śudras Shudra / Śudra Sicilian circle cylch Sisili Sicilian circles cylch Sisili Sikh Sikh Sikh sikhaidd Sikh identity hunaniaeth y Sikhiaid Sikhism Sikhiaeth Silurian Silwraidd Simmonds nut nyten Simmonds Simmonds nuts nyten Simmonds Simpson's rule dull Simpson Simpson's rules dull Simpson Single Award Dyfarniad Sengl Singspiel Singspiel Sir Syr (title of nobleman) Sistine Chapel Capel Sistin Sita Sita Sitka spruce pyrwydden Sitca Sitka spruces pyrwydden Sitca Social Democrat Sosialydd Democrataidd Social Democratic Party Plaid y Democratiaid Cymdeithasol (SDP) Socialist Party Plaid Sosialaidd Society of Christ Cymdeithas yr Iesu Society of Friends Cymdeithas y Cyfeillion Solemn League & Covenant Cynghrair Sanctaidd a Chyfamod Solicitor General Cyfreithiwr Cyffredinol Solicitors Act 1971 Deddf y Twrneiod 1971 Solicitors Act 1971s Deddf y Twrneiod 1971 Solidarity Mudiad Solidarność (movement) South Sea Bubble Swigen Môr y De South Wales Miner's Federation Ffederasiwn Glowyr De Cymru Spanish Fury Cynddaredd y Sbaenwyr Spanish Inquisition Chwilys Sbaen Spanish Main Môr Sbaenaidd Spanish ulcer aflwydd Sbaenaidd, yr Spanish ulcers aflwydd Sbaenaidd, yr Spartacist revolt gwrthryfel y Spartaciaid Spartacist revolts gwrthryfel y Spartaciaid Spearman rank correlation coefficient cyfernod cydberthyniad rhestrol Spearman Spearman rank correlation coefficients cyfernod cydberthyniad rhestrol Spearman Special Areas Act Deddf yr Ardaloedd Arbennig Sports Council Cyngor Chwaraeon Square Dance Dawns Sgwâr St John Ambulance Ambiwlans Sant Ioan St Louis Louis Sant Stalinist Stalinydd Stamp Act Deddf Stamp Standard Assessment Task Tasg Asesu Safonol (SAT) Standard Temperature and Pressure Tymheredd a Gwasgedd Safonol (STP) Standard Tests and Assessment Implementation Research Ymchwil Gweithredu Profion ac Asesu Safonol (STAIR) Star Chamber Siambr y Seren Star of David Seren Dafydd State Department Adran Wladol Stations of the Cross Ffordd y Groes (of service) Stations of the Cross Gorsafoedd y Groes (of places) Statute of Proclamations Statud Proclamasiwn Statute of Retainers Statud Gwŷr ar Gadw Statute of Rhuddlan Statud Rhuddlan Statute of Uses Statud Defnyddiau Statute of Wales Statud Cymru Statute of Westminster Statud Westminster Steiner philosophy athroniaeth Steiner Stevenson screen sgrin Stevenson Stevenson screens sgrin Stevenson Stone Age Oes y Cerrig Stonehenge Côr y Cewri Straits Convention Cytundeb y Culfor Strategic Intent for Health Services in Wales Bwriad Strategol Gwasanaethau Iechyd Cymru Strathspey step step Strathspey Strathspey steps step Strathspey Stuarts Stiwartiaid Submission of the Clergy Ymostyngiad y Glerigaeth Subsidy Roll Rhôl Cymorth Succession States Gwladwriaethau'r Olyniaeth Sufi Sufi Sukkot Sukkot Suleiman the Magnificent Swleiman Ysblennydd Sultan Swltan Sunday school ysgol Sul Sunday schools ysgol Sul Sunni Sunni Superwash wool gwlân 'Superwash' Superwash wools gwlân 'Superwash' Supplication against the Ordinaries Ymbil yn erbyn yr Ordinariaid Supply of Goods Act Deddf Cyflenwi Nwyddau Supreme Court Llys Goruchaf Supreme Court of Judicature Goruchaf Lys y Farnwriaeth Supreme Governor Uchaf-Lywodraethwr Supreme Head Goruchaf Ben Supreme Soviet Sofiet Goruchaf Surform blade llafn Surform Surform blades llafn Surform Swede Swediad Swedish Swedaidd Swedish Swedeg (language) Swedish iron haearn Sweden Swedish irons haearn Sweden Swiss darn craith Swisaidd Swiss darns craith Swisaidd T test prawf T T tests prawf T T-halving joint uniad haneru T T-halving joints uniad haneru T T-hinge colfach T T-hinges colfach T T-shaped stretcher estynnwr ffurf T T-shaped stretchers estynnwr ffurf T T-shirt crys T T-shirts crys T T-slot agen T T-slots agen T T.P.I. dannedd i'r fodfedd (teeth per inch) TEC Training and Enterprise Councils Cynghorau Hyfforddi a Menter TGAT Task Group on Assessment and Testing GAP Gweithgor ar Asesu a Phrofi TRIST TVEI Related In-Service Training HMS-ADAG Hyfforddiant Mewn Swydd yn gysylltiedig ag ADAG TV listings amserlenni teledu TVEI Technical Vocational Education Initiative ADAG Addysg Dechnegol a Galwedigaethol Taborites Taboriaid Taff Vale Case Achos Dyffryn Taf Talmud Talmud Taoist Taoaidd Taoist Taoydd Tartar Tartar Tartar Tartaraidd Temporary Bench Mark Meincnod Dros Dro (TBM) Tenakh Tenakh Tenth Penny Y Ddegfed Geiniog Terylene Terylene Test Act Deddf Brawf Test and Corporation Acts Deddfau Prawf a Chorfforaeth Theatine Theatiad Theravada Theravada Thevenin's theorem theorem Thevenin Thevenin's theorems theorem Thevenin Third Estate y Drydedd Stad Third Reich Trydedd Reich Third Republic Trydedd Weriniaeth Thirteen Articles Tair Erthygl ar Ddeg Thirty Nine Articles Deugain Erthygl Namyn Un Thirty Years War Rhyfel Deng Mlynedd ar Hugain Thomas the Tank Engine Tomos y Tanc Thomism Tomistiaeth Thomistic Tomistig Three Resolutions Tri Phenderfyniad (1629) Time of Troubles Cyfnod y Cynnwrf Tinbergen's rule rheol Tinbergen Tinbergen's rules rheol Tinbergen Tironian Tironiad Tithe Commutation Act Deddf Cyfnewid y Degwm Tithe War Rhyfel y Degwm Toleration Act Deddf Goddefiad Tolpuddle Martyrs Merthyron Tolpuddle Tonk strip stribed Tonk (shelf) Tonk strips stribed Tonk (shelf) Tonk's fitting ffitiad Tonk Tonk's fittings ffitiad Tonk Torah Torah Tory Party Plaid Dorïaidd Tory reform diwygiad y Torïaid Tory reforms diwygiad y Torïaid Total Station Gweithfan Gyfansawdd Town and Country Planning Act Deddf Cynllunio Gwlad a Thref Tractarianism Tractariaeth Trade Descriptions Act Deddf Disgrifiadau Masnach Trade Disputes Act Deddf Anghydfodau Undebol Trade Union Congress Cyngres yr Undebau Llafur Trades Union Amendment Act Deddf Newid yr Undebau Llafur Trading Standards Department Adran Safonau Masnachu Transistor-Transistor logic rhesymeg Transistor-Transistor Transistor-Transistor logics rhesymeg Transistor-Transistor Treachery of the Blue Books Brad y Llyfrau Gleision Treason of the Blue Books Brad y Llyfrau Gleision Treasury Bill Bil Trysorlys Triassic Triasig Tribunals and Inquiries Act Deddf Tribiwnlysoedd ac Ymchwiliadau Tridentine Tridentaidd Triennial Act Deddf Deirblwydd Trinity Trindod Tripartite Indenture Cytundeb Tridarn Triple Alliance Cynghrair Driphlyg Tripoli compound sebon Tripoli Tripoli compounds sebon Tripoli Tropic of Cancer Trofan Cancr Tropic of Capricorn Trofan Capricorn Trotskyism Trotscïaeth Trotskyist Trotscïad Trust Territory Tiriogaeth Ymddiriedig Trustee Savings Bank Banc Cynilo Ymddiriedol Tsar of all the Russians Tsar yr holl Rwsiaid Tsardom Tsaraeth Tudor dynasty llinach y Tuduriaid Tudor rebellions gwrthryfeloedd cyfnod y Tuduriaid Tudor settlement ardrefniant Tuduraidd Tudor settlements ardrefniant Tuduraidd Tudors Tuduriaid Turk Twrc Turkish Twrcaidd Turkish Empire Ymerodraeth Twrci Turkish stitch pwyth Twrcaidd Turkish stitches pwyth Twrcaidd Twelve Articles Deuddeg Erthygl U shaped valley dyffryn ffurf U U-bend pibell U U-bends pibell U U-boat llong danfor Almaenig U-boats llong danfor Almaenig U-section trychiad U U-sections trychiad U U-shaped ar ffurf U U-shaped kitchen cegin ar ffurf U U-shaped kitchens cegin ar ffurf U U-tool erfyn U U-tools erfyn U U.S.S.R. Undeb Sofietaidd, yr U.S.S.R.s Undeb Sofietaidd, yr UCCA Cyngor Canolog ar gyfer Mynediad i'r Prifysgolion UK energy policy polisi egni'r Deyrnas Unedig UN convention on the rights of the child confensiwn yr UN ar hawliau plant Ukrainian Wcrainaidd Ukrainian Wcrainiad Ulster Loyalist Teyrngarwr Ulster Ulster Unionist Unoliaethwr Ulster Ulster Volunteer Gwirfoddolwr Ulster Ulster plantations trefedigaethau Ulster Ultra-Royalist Uchel Frenhinwr Unfair Contract Terms Act Deddf Telerau Contract Annheg Uniate Church Eglwys Uniadol Unilateral Declaration of Independence Datganiad Annibyniaeth Unochrog Union Jack Jac yr Undeb Unionist Party Plaid yr Unoliaethwyr United Brotherhood Brawdoliaeth Unedig United Irishmen Cymdeithas y Gwyddelod Unedig United Kingdom Teyrnas Unedig, y Deyrnas Unedig (as defined in law) United Nations Cenhedloedd Unedig United Nations International Children's Fund Cronfa Ryngwladol Plant y Cenhedloedd Unedig (UNICEF) United Reformed Church Eglwys Ddiwygiedig Unedig University Tests Acts Deddfau Prawf y Prifysgolion Unlawful Oaths Act Deddf Llwon Anghyfreithlon Unsolicited Goods & Services Act Deddf Nwyddau a Gwasanaethau nas Archebwyd Uranus Wranws Utopia Iwtopia Utraquism Wtraciaeth Utraquist Wtracwr (of person) V base gwaelod V V bases gwaelod V V blocks and clamps blociau V a chlampiau V pulley pwli V V-cut toriad V V-cuts toriad V V-joint uniad V V-joints uniad V V-section toriad V V-sections toriad V V-shape ffurf V V-shaped ar ffurf V V-shapes ffurf V V-tool erfyn V V-tools erfyn V V-weapons arfau V Vaishnavism / Vaisnavism Vaishnaviaeth / Vaisnaviaeth Vaishya / Vaisya Vaishya / Vaisya Vandyke brown brown Vandyke Vandyke browns brown Vandyke Vandyke crystals grisialau Vandyke Vandyke smocking smocwaith Vandyke Vandyke smockings smocwaith Vandyke Vaseline Vaseline Vassa Vassa Vatican Fatican Vauclusian spring tarddell Vaucluse Vauclusian springs tarddell Vaucluse Veblen goods nwyddau Veblen Venetian Fenisaidd Venetian red coch Fenis Venetian reds coch Fenis Venn diagram diagram Venn Venn diagrams diagram Venn Venturi meter mesurydd Venturi Venturi meters mesurydd Venturi Venus Gwener Versailles settlement ardrefniant Versailles Versailles settlements ardrefniant Versailles Vestiarian Controversy Ymryson yr Urddwisgoedd Victorian Fictoraidd Victorian middle-class family teulu dosbarth canol Fictoraidd Victorian terraced house tŷ teras Fictoraidd Victorian terraced houses tŷ teras Fictoraidd Vietnam Fietnam Viking Llychlynnaidd Viking Llychlynnwr Vinaya Vinaya Vishnu / Visnu Vishnu / Visnu Viyella Viyella Vulgate Fwlgat Vulgate Bible Beibl Fwlgat Vygotskian tutorial tiwtorial Vygotskian Vygotskian tutorials tiwtorial Vygotskian WISE Women in Science and Engineering Merched mewn Gwyddoniaeth a Pheirianneg WJEC Welsh Joint Education Committee CBAC Cyd-bwyllgor Addysg Cymru WOED Welsh Office Department of Education Adran Addysg y Swyddfa Gymreig Waheguru / Vahiguru Waheguru / Vahiguru Wailing Wall Mur Wylofain Waldenses Waldensiaid Waldensian Waldensaidd Wales Herald of Arms Extraordinary Herodr Arbenigol Cymru Wales regions rhanbarthau Cymru Wallace's Line Llinell Wallace Wallerian degeneration ymddatod Walleraidd War of Austrian Succession Rhyfel Olyniaeth Awstria War of League of Augsburg Rhyfel Cynghrair Augsburg War of Polish Succession Rhyfel Olyniaeth Pwyl War of Spanish Succession Rhyfel Olyniaeth Sbaen Warrington pattern hammer morthwyl patrwm Warrington Warrington pattern hammers morthwyl patrwm Warrington Wars of the Roses Rhyfeloedd y Rhosynnod Washita oilstone carreg hogi Washita Washita oilstones carreg hogi Washita Water of Ayr stone carreg Ayr Weights & Measures Act Deddf Pwysau a Mesurau Welch Whim Chwiw Gymreig Welsh Bible Beibl Cymraeg Welsh Church Temporalities Act Deddf Eiddo Bydol Eglwys Cymru Welsh Folk Dance Society Cymdeithas Ddawns Werin Cymru Welsh League of Youth Urdd Gobaith Cymru Welsh National Board Bwrdd Cenedlaethol Cymru (WNB) Welsh Nationalist Party Plaid Genedlaethol Cymru Welsh Office Swyddfa Gymreig Welsh Trust Ymddiriedolaeth Gymreig Welsh folk dancing dawnsio gwerin Cymreig Welsh gentry bonedd Cymreig Welsh harp telyn Gymreig Welsh harps telyn Gymreig Welsh language policy polisi Cymraeg Welsh law Cyfraith Hywel Welsh laws Cyfraith Hywel Welsh quilting cwiltio Cymreig Welsh wool gwlân Cymru Welsh wools gwlân Cymru Welsh-medium cyfrwng Cymraeg Welsh-medium education addysg cyfrwng Cymraeg Welsh-medium educations addysg cyfrwng Cymraeg Welshness Cymreictod Wendicote loom gwŷdd Wendicote Wendicote looms gwŷdd Wendicote Wendy loom gwŷdd Wendy Wendy looms gwŷdd Wendy Wesleyan Weslead Wesleyan Methodism Methodistiaeth Wesleaidd Wesleyanism Wesleaeth West Bank Glan Orllewinol Western religions crefyddau’r Gorllewin Western roll rhôl y Gorllewin (in gymnastics) Western rolls rhôl y Gorllewin (in gymnastics) Western values gwerthoedd y Gorllewin Wharton's jelly jeli Wharton Wheatstone's bridge circuit cylched pont Wheatstone Wheatstone's bridge circuits cylched pont Wheatstone Whig Chwig Whig Chwigaidd Whig Party Plaid y Chwigiaid White House Tŷ Gwyn Whitsun Sulgwyn Whitworth thread edau Whitworth Whitworth threads edau Whitworth Wild West Gorllewin Gwyllt William of Orange Gwilym o Orange William the Conqueror Gwilym Goncwerwr William the Silent Gwilym Dawedog Winchester disk disg Winchester Winchester disks disg Winchester Winifred Gwenffrewi Witton high frequency furnace ffwrnais amledd uchel Witton Witton high frequency furnaces ffwrnais amledd uchel Witton Women's Institute Sefydliad y Merched Women's Social and Political Union Undeb Cymdeithasol a Gwleidyddol y Merched Woodruff key allwedd Woodruff Woolmark Nod Gwlân Workers' Education Association Cymdeithas Addysg y Gweithwyr (WEA) Working Families' Tax Credit Credyd Treth Teuluoedd sy'n Gweithio World Cup Cwpan y Byd World Health Organization Mudiad Iechyd y Byd (WHO) World Trade Organisation WTO Cyfundrefn Masnach y Byd WTO World Wide Web We Fyd-eang, y X-efficiency effeithlonrwydd-X Yahweh Yahweh Yarrel blenny llyfrothen Yarrel Young Italy Eidal Ifanc (movement) Zakat Zakat Zener diode deuod Zener Zener diodes deuod Zener Zone of Proximal Development Parth Datblygu Procsimol a cappella a cappella a posteriori a posteriori a priori a priori a.c. generator generadur cerrynt eiledol a.c. generators generadur cerrynt eiledol abacus abacws abandon gadael abandoned meander ystumllyn abandoned meanders ystumllyn abasement darostyngiad abasements darostyngiad abaxial allechelinol abbacy abadaeth abbess abades abbey abaty abbot abad abbots abad abbreviate talfyrru abbreviation byrfodd (in typography) abbreviation talfyriad (=abbreviated form) abbreviations byrfodd (in typography) abbreviations talfyriad (=abbreviated form) abc behaviour ymddygiad abc abc behaviours ymddygiad abc abc procedure dull gweithredu abc abc procedures dull gweithredu abc abdicate ildio'r goron (the crown) abdication ymddiorseddiad abdication crisis argyfwng yr ymddiorseddiad abdications ymddiorseddiad abdomen abdomen abdomens abdomen abdominal abdomenol abdominal cavity ceudod abdomenol abdominal exercise ymarfer abdomen abdominal exercises ymarfer abdomen abducent nerve nerf abdwcent abducent nerves nerf abdwcent aberrant gwyrol aberrant species rhywogaeth wyrol aberration egwyriant aberrations egwyriant abhorrer ffieiddiwr abhorrers ffieiddiwr ability gallu ability group grŵp gallu ability grouping grwpio yn ôl gallu ability groups grŵp gallu ability range ystod gallu ability ranges ystod gallu ability test prawf gallu ability tests prawf gallu abiotic anfiotig abjuration ymwadiad ar lw abjurations ymwadiad ar lw abjure ymwadu ar lw ablate abladu ablation abladiad ablation till til abladu ablation tills til abladu ablations abladiad able galluog ablution golchiad ablutions golchiad abnormal annormal abnormal data data annormal abnormality annormaledd abolish dileu abolition dilead abolition of slavery dileu caethwasiaeth abolitions dilead abomasum abomaswm abomasums abomaswm aboriginal cynfrodorol aboriginal art celfyddyd gynfrodorol aboriginal arts celfyddyd gynfrodorol aborigine cynfrodor aborigines cynfrodor abort erthylu (a fetus) abortifacient cyffur erthylu abortifacients cyffur erthylu abortion erthyliad abortions erthyliad abozzo abozzo (sketch) abrade sgrafellu abraded sgrafellog abrasion crafiad (on skin) abrasion sgrafelliad (on land) abrasion sgraffiniad (on metal etc) abrasions crafiad (on skin) abrasions sgrafelliad (on land) abrasions sgraffiniad (on metal etc) abrasive sgraffiniol abrasive sgraffinydd abrasive action arwaith sgraffinio abrasive actions arwaith sgraffinio abrasive faults beiau sgraffinio abrasive grades graddau sgraffinio abrasive paper papur sgraffinio abrasive papers papur sgraffinio abrasive sheet dalen sgraffinio abrasive sheets dalen sgraffinio abrasives sgraffinydd abrogate diddymu abrupt cadence diweddeb swta abrupt cadences diweddeb swta abscess crawniad abscisic acid asid absgisig abscisic acids asid absgisig abscissa absgisa abscissas absgisa abscission absgisedd abscission layer haenen absgisaidd abscission layers haenen absgisaidd abscissions absgisedd abseil abseil abseil abseilio abseils abseil absence absenoldeb absence of light diffyg golau absences absenoldeb absent absennol absentee absenolwr absenteeism absenoliaeth absenteeisms absenoliaeth absentees absenolwr absolute absoliwt absolute Oneness of God Undod absoliwt Duw absolute address cyfeiriad absoliwt absolute advantage mantais lwyr absolute advantages mantais lwyr absolute alcohol alcohol pur absolute alcohols alcohol pur absolute humidity lleithder absoliwt absolute monarchy brenhiniaeth absoliwt absolute music cerddoriaeth absoliwt absolute musics cerddoriaeth absoliwt absolute pitch traw cynhenid absolute pitches traw cynhenid absolute ruler rheolwr absoliwt absolute rulers rheolwr absoliwt absolute scale of temperature graddfa tymheredd absoliwt absolute spectrum sbectrwm absoliwt absolute spectrums sbectrwm absoliwt absolute value gwerth absoliwt absolute values gwerth absoliwt absolute zero sero absoliwt absolution maddeuant absolutions maddeuant absolutism absoliwtiaeth absolutisms absoliwtiaeth absolved soul enaid rhydd absolved souls enaid rhydd absorb amsugno absorbance amsugnedd absorbances amsugnedd absorbed stain staen wedi'i amsugno absorbed stains staen wedi'i amsugno absorbency amsugnedd absorbent amsugnol absorbent amsugnydd absorbent fabric ffabrig amsugnol absorbent fabrics ffabrig amsugnol absorbent material defnydd amsugnol absorbent materials defnydd amsugnol absorbent pad pad amsugnol absorbent pads pad amsugnol absorbent paper papur amsugnol absorbent papers papur amsugnol absorbents amsugnydd absorber amsugnydd absorbers amsugnydd absorption amsugniad absorption band band amsugno absorption bands band amsugno absorption coefficient cyfernod amsugno absorption coefficients cyfernod amsugno absorption costing costio amsugno absorption spectrum sbectrwm amsugno absorption spectrums sbectrwm amsugno absorptions amsugniad absorptive cell cell amsugno absorptive cells cell amsugno abstinence ymataliad abstinences ymataliad abstract alldynnu (=take from) abstract crynhoi (=summarize) abstract crynodeb (=summary) abstract haniaeth (=intangible thing) abstract haniaethol abstract haniaethu (=consider abstractly) abstract art celfyddyd haniaethol abstract arts celfyddyd haniaethol abstract concept cysyniad haniaethol abstract concepts cysyniad haniaethol abstract design cynllun haniaethol (of plan) abstract design dyluniad haniaethol (of drawing) abstract designs cynllun haniaethol (of plan) abstract designs dyluniad haniaethol (of drawing) abstract expressionism mynegiadaeth haniaethol abstract expressionisms mynegiadaeth haniaethol abstract music cerddoriaeth haniaethol abstract musics cerddoriaeth haniaethol abstract painting paentiad haniaethol (of picture) abstract painting peintio haniaethol (of process or art) abstract paintings paentiad haniaethol (of picture) abstract pattern patrwm haniaethol abstract patterns patrwm haniaethol abstraction haniaeth abstractions haniaeth abstracts crynodeb (=summary) abstracts haniaeth (=intangible thing) absurd afresymol abundance cyflenwad (percentage or fraction) abundance digonedd (=plenty) abundances cyflenwad (percentage or fraction) abundances digonedd (=plenty) abuse cam-drin (=ill-treat) abuse camddefnydd (=misuse) abuse camddefnyddio (=misuse) abuse camdriniaeth (=ill-treatment) abuses camddefnydd (=misuse) abuses camdriniaeth (=ill-treatment) abut ffinio â (of lands, premises) abut ymylu ar (in general) abutment ateg (in general) abutment ategwaith (architectural) abutments ateg (in general) abutments ategwaith (architectural) abysmal affwysol abyss affwys abyssal deposits dyddodion affwys (of the ocean) academic academaidd academic counselling cynghori academaidd academic dress gwisg academaidd academic historian hanesydd academaidd academic historians hanesydd academaidd academic infrastructure isadeiledd academaidd academic infrastructures isadeiledd academaidd academic registrar cofrestrydd academaidd academic registrars cofrestrydd academaidd academic standard safon academaidd academic standards safon academaidd academic success llwyddiant academaidd academic year blwyddyn academaidd academic years blwyddyn academaidd academician academydd academicians academydd academicism academiaeth academicisms academiaeth academy academi academy board bwrdd academi academy boards bwrdd academi academy figure ffigur academi academy figures ffigur academi acanthus carving cerfiad acanthws acanthus carvings cerfiad acanthws accelerate cyflymu accelerated cyflymedig accelerated course cwrs carlam accelerated courses cwrs carlam accelerated freeze dried sychrewedig cyflym accelerated freeze drying sychrewi cyflym accelerated programme rhaglen garlam accelerated programmes rhaglen garlam accelerating cavity ceudod cyflymu accelerating field maes cyflymu accelerating fields maes cyflymu accelerating potential difference gwahaniaeth potensial cyflymu accelerating potential differences gwahaniaeth potensial cyflymu acceleration cyflymiad acceleration / time diagram diagram cyflymiad / amser acceleration / time diagrams diagram cyflymiad / amser acceleration due to gravity cyflymiad disgyrchiant acceleration graph graff cyflymiad acceleration graphs graff cyflymiad accelerations cyflymiad accelerator cyflymydd accelerator nerve nerf cyflymu accelerator nerves nerf cyflymu accelerator theory damcaniaeth cyflymu accelerators cyflymydd accent acen accent acennu accented acennog accented passing note nodyn camu acennog accented passing notes nodyn camu acennog accents acen accept derbyn acceptance derbyniad acceptance testing profi derbyniad acceptances derbyniad acceptor derbynnydd acceptor atom atom derbyn acceptor atoms atom derbyn acceptor circuit cylched dderbyn acceptor circuits cylched dderbyn acceptors derbynnydd access cael at (=get to) access cyrchiad (=the action of gaining access to a file, data etc) access cyrchu (a file, data etc) access hawl gweld (=the right to reach or see) access mynediad (=a way of approaching) access course cwrs mynediad access courses cwrs mynediad access information cyrchu'r wybodaeth access privilege cyrchfraint access privileges cyrchfraint access road ffordd fynediad access roads ffordd fynediad access staircase grisiau mynediad access time amser cyrchu (in computing) access times amser cyrchu (in computing) accessibility hygyrchedd accessibility index mynegai hygyrchedd accessibility indexes mynegai hygyrchedd accessibility of task hygyrchedd tasg accessible hygyrch accessory ategol accessory ategolyn (of tools etc) accessory cyfwisg (of dress) accessory bone asgwrn atodol accessory bones asgwrn atodol accessory bud blaguryn atodol accessory buds blaguryn atodol accessory course cwrs atodol accessory courses cwrs atodol accessory nerve nerf atodol accessory nerves nerf atodol acciaccatura acciaccatura acciaccaturas acciaccatura accident damwain accident and emergency damwain ac argyfwng accident and emergency department adran ddamweiniau ac achosion brys accident and emergency departments adran ddamweiniau ac achosion brys accidental hapnod (=musical sign) accidentals hapnod (=musical sign) accidents anhanfodion (in theology) accidents damwain acclimatization ymaddasiad acclimatizations ymaddasiad acclimatize ymaddasu accommodate cymhwyso (=adapt) accommodate lletya (=provide lodging for) accommodate ymgymhwyso (=adapt) accommodation cymhwysiad (=adaptation) accommodation llety (=place to live) accommodation ymgymhwysiad (of lens, of oneself) accommodations cymhwysiad (=adaptation) accommodations llety (=place to live) accommodations ymgymhwysiad (of lens, of oneself) accompanied canon canon â chyfeiliant accompanied canons canon â chyfeiliant accompanied fugue ffiwg â chyfeiliant accompanied fugues ffiwg â chyfeiliant accompaniment cyfeiliant (with music) accompaniment cyfwyd (to food) accompaniments cyfeiliant (with music) accompaniments cyfwyd (to food) accompanist cyfeilydd (with music) accompanists cyfeilydd (with music) accompany cyfeilio (with music) accompany mynd gyda (=go with) accomplishment cyflawniad (=fulfilment of task) accomplishment llwyddiant (=thing done) accomplishments cyflawniad (=fulfilment of task) accomplishments llwyddiant (=thing done) accordance of summit levels cyfuchedd copaon accordant cyfuwch according to yn unol â (=in a manner corresponding to) according to yn ôl (=as stated by) according to weighting yn ôl y pwysoli accordingly felly (=therefore) accordingly yn unol â hynny (=as required) accordion acordion accordion pleating pletio acordion accordions acordion account adroddiad (=report) account cyfrif (in bank etc) account disgrifiad (=description) account for rhoi cyfrif am account name enw'r cyfrif account names enw'r cyfrif accountability atebolrwydd accountable atebol (to) accountancy cyfrifeg accountant cyfrifydd accountants cyfrifydd accounting cost cost gyfrifyddol accounting costs cost gyfrifyddol accounting system system gyfrifydda accounting systems system gyfrifydda accounts adroddiad (=report) accounts cyfrif (in bank etc) accounts disgrifiad (=description) accounts clerk clerc cyfrifon accounts clerks clerc cyfrifon accredit achredu accreditation achrediad accreditation of prior learning achredu dysgu blaenorol accreditation procedure trefn achredu accreditation procedures trefn achredu accreditations achrediad accretion croniant accretions croniant accrued interest llog cronedig accrued interests llog cronedig acculturation goddiwylliannu accumulate cronni accumulated temperature tymheredd cronedig accumulated temperatures tymheredd cronedig accumulation croniad accumulations croniad accumulative cronnol accumulator croniadur accumulators croniadur accuracy cywirdeb (=correctness) accuracy manwl gywirdeb (=exact precision) accuracy of the performance cywirdeb y perfformiad accurate cywir (=correct) accurate manwl gywir (=exactly precise) accurate record cofnod cywir accurate records cofnod cywir accurate shape siâp cywir accurate shapes siâp cywir accurate size maint cywir accurate sizes maint cywir acellular anghellog acetabular asetabwlaidd acetabulum asetabwlwm acetabulums asetabwlwm acetal asetal acetal resin resin asetal acetal resins resin asetal acetals asetal acetate asetad acetate cellulose cellwlos asetad acetate celluloses cellwlos asetad acetate sheet asetyn acetate sheets asetyn acetates asetad acetic asetig acetic acid asid asetig acetic acids asid asetig acetone aseton acetones aseton acetyl asetyl acetyl CoA asetyl CoA acetylation asetyleiddio acetylcholine asetylcolin acetylcholines asetylcolin acetylcholinesterase asetylcolinesteras acetylcholinesterases asetylcolinesteras acetylene asetylen acetylene welding weldio asetylen acetylenes asetylen acetyls asetyl achene achen achenes achen achieve cyflawni (=accomplish or carry out) achieve ennill (=reach or attain by effort) achieve llwyddo (=be successful) achieve an objective cyflawni amcan achievement camp (=exploit) achievement cyflawniad (in National Curriculum) achievement age oed cyrhaeddiad achievement ages oed cyrhaeddiad achievement test prawf cyrhaeddiad achievement tests prawf cyrhaeddiad achievements camp (=exploit) achievements cyflawniad (in National Curriculum) achiral anghirol achromatic acromatig achromatic vision golwg acromatig achromatic visions golwg acromatig acid asid acid Bessemer process proses asid Bessemer acid base balance cydbwysedd asid bas acid base balances cydbwysedd asid bas acid bath baddon asid acid baths baddon asid acid dissociation constant cysonyn daduniad asid acid dissociation constants cysonyn daduniad asid acid dye llifyn asid acid dyes llifyn asid acid mordant mordant asid (etching) acid mordants mordant asid (etching) acid open hearth process proses asid tân agored acid pickle picl asid acid pickles picl asid acid rain glaw asid acid rains glaw asid acid resisting gwrthasid acid resisting varnish farnais gwrthasid acid resisting varnishs farnais gwrthasid acid strength cryfder asid acid strengths cryfder asid acid test prawf asid acid test ratio cymhareb prawf asid acid tests prawf asid acid-base asid-bas acid-base titration titradu asid-bas acidic asidig acidified asidiedig acidify asidio acidity asidedd acidosis asidosis acids asid acidulated asidiedig acknowledge cydnabod acme acme acme thread edau acme acme threads edau acme acmes acme acolyte acolit acolytes acolit acoustic acwstig acoustic bass bas acwstig acoustic board bwrdd acwstig acoustic boards bwrdd acwstig acoustic coupler cyplydd acwstig acoustic couplers cyplydd acwstig acoustic guitar gitâr acwstig acoustic guitars gitâr acwstig acoustic plaster plastr acwstig acoustic plasters plastr acwstig acoustics acwsteg acquire caffael acquired caffaeledig acquired dyslexia dyslecsia caffaeledig acquired dyslexias dyslecsia caffaeledig acquired feature nodwedd gaffaeledig acquired features nodwedd gaffaeledig acquired immunity imiwnedd caffaeledig acquired language iaith gaffaeledig acquired languages iaith gaffaeledig acquired word blindness dallineb geiriau caffaeledig acquiring authority awdurdod caffaelol acquisition caffaeliad (of language, skills) acquisition number rhif derbyn acquisition numbers rhif derbyn acquisitions caffaeliad (of language, skills) acquisitive society cymdeithas feddiangar acquittal rhyddfarn acquittals rhyddfarn acre erw acres erw acrobat acrobat acrobats acrobat acrocentric acrosentrig acronym acronym acronyms acronym acrosome acrosom acrosomes acrosom across the grain ar draws y graen acrostic acrostig acrylic acrylig acrylic canvas cynfas acrylig acrylic colour lliw acrylig acrylic colours lliw acrylig acrylic medium cyfrwng acrylig acrylic mediums cyfrwng acrylig acrylic paint paent acrylig acrylic paints paent acrylig acrylic resin resin acrylig acrylic resins resin acrylig acrylics acrylig acryloid acryloid acryloids acryloid act deddf (=law) act gweithred (=deed, action) act gweithredu act of God gweithred Duw act of parliament deddf seneddol act tune entr'acte act tunes entr'acte act utilitarianism iwtilitariaeth gweithredoedd act utilitarianisms iwtilitariaeth gweithredoedd actinium actiniwm (Ac) actiniums actiniwm (Ac) actinomorphic actinomorffig action arwaith (=exertion of energy or influence) action drama (in opera) action effaith (=effect) action gweithred (=thing done) action symudiad (in dance) action and reaction arwaith ac adwaith action of acid on copper effaith asid ar gopr action painting paentiad gweithredol (of painted picture) action painting peintio gweithredol (of process or art) action paintings paentiad gweithredol (of painted picture) action plan cynllun gweithredu action plans cynllun gweithredu action point pwynt gweithredu action points pwynt gweithredu action potential potensial gweithredu action potentials potensial gweithredu action research ymchwil gweithredol action researches ymchwil gweithredol action song cân actol action songs cân actol action spectrum sbectrwm gweithredu action spectrums sbectrwm gweithredu action-space gofod gweithredu action-spaces gofod gweithredu actionable per se cyfreithadwy per se actions arwaith (=exertion of energy or influence) actions drama (in opera) actions effaith (=effect) actions gweithred (=thing done) actions symudiad (in dance) actions on the floor gweithrediadau ar y llawr activate actifadu (in chemistry) activate ysgogi (in general) activated actifedig (in chemistry) activation actifiant activation energy egni actifadu activations actifiant activator actifadydd activators actifadydd active actif (in science) active bywiog (=lively) active effro (of mind) active gweithgar (of person, life) active gweithredol (=operative) active audience cynulleidfa weithredol active audiences cynulleidfa weithredol active centre canolfan actif active centres canolfan actif active flux fflwcs gweithredol active fluxes fflwcs gweithredol active immunity imiwnedd gweithredol active lifestyle dull o fyw bywiog active lifestyles dull o fyw bywiog active listening gwrando gweithredol active planning cynllunio gweithredol active population poblogaeth o oed gwaith active populations poblogaeth o oed gwaith active reading darllen gweithredol active transport cludiant actif (in biology) active transports cludiant actif (in biology) activity actifedd (of chemical function) activity gweithgaredd (in general sense) activity coefficient cyfernod actifedd activity coefficients cyfernod actifedd activity flow llif gweithgaredd activity flows llif gweithgaredd activity learning dysgu drwy weithgaredd activity method dull dysgu drwy weithgaredd activity methods dull dysgu drwy weithgaredd activity specific gweithgaredd benodol activity teaching addysgu drwy weithgaredd actual cost cost wirioneddol actual costs cost wirioneddol actual instruction cyfarwyddyd gwirioneddol (that blows) actual instructions cyfarwyddyd gwirioneddol (that blows) actual investment buddsoddiad cyflawnedig (cord, rope etc) actual investments buddsoddiad cyflawnedig (cord, rope etc) actual parameter paramedr gwirioneddol actual parameters paramedr gwirioneddol actual sin pechod gweithredol actual sins pechod gweithredol actual size maint iawn actual sizes maint iawn actuality digwyddiadau ar y pryd actuate ysgogi actuating plate plât ysgogi actuating plates plât ysgogi acuity craffter acupuncture aciwbigo acute llem (with feminine nouns) acute llym (with masculine and plural nouns) acute angle ongl lem acute angled triangle triongl ongl lem acute angled triangles triongl ongl lem acute angles ongl lem acute confusional state cyflwr dryslyd llym acute confusional states cyflwr dryslyd llym acute illness afiechyd llym acute pain poen llym acute pains poen llym acyl asyl acyl halide asyl halid acyl halides asyl halid acylate asyleiddio acylation asyleiddiad acylations asyleiddiad ad lib ad lib ad lib ad libio ad libs ad lib ad valorem subsidy cymhorthdal ad valorem ad valorem tax treth ad valorem ad valorem taxes treth ad valorem adapt addasu adapt ymaddasu adapt to a specialized environment ymaddasu i amgylchfyd arbennig adaptability hyblygrwydd adaptable addasadwy (in general) adaptable hyblyg (of person) adaptation addasiad (in general) adaptation ymaddasiad (of self) adaptation of pattern addasiad patrwm adaptations addasiad (in general) adaptations ymaddasiad (of self) adaptive addasol (in general) adaptive ymaddasol (of self) adaptive behaviour ymddygiad ymaddasol adaptive behaviours ymddygiad ymaddasol adaptive development datblygiad ymaddasol adaptive developments datblygiad ymaddasol adaptive education addysg ymaddasol adaptive educations addysg ymaddasol adaptive programme rhaglen ymaddasol adaptive programmes rhaglen ymaddasol adaptive response ymateb ymaddasol adaptive responses ymateb ymaddasol adaptor addasydd adaptors addasydd adaxial adechelinol add adio (numbers) add-on ychwanegyn add-ons ychwanegyn added atodol (in music) added note nodyn atodol added notes nodyn atodol added sixth chweched atodol added sixth chord cord y chweched atodol added sixth chords cord y chweched atodol added sixths chweched atodol added value hyd atodol (of musical note) added value note nodyn hyd atodol added value notes nodyn hyd atodol added values hyd atodol (of musical note) addend adend addends adend addendum adendwm addendums adendwm adder adydd (related to addition) adders adydd (related to addition) addict adict addicted caeth (to drugs etc) addiction caethiwed addictions caethiwed addictive caethiwus addicts adict adding machine peiriant adio adding machines peiriant adio addition adiad (in counting numbers) addition ychwanegiad (=thing added) addition law deddf adio addition laws deddf adio addition polymerization polymeriad adio addition polymerizations polymeriad adio addition reaction adwaith adio addition reactions adwaith adio additional ychwanegol additional accompaniment cyfeiliant ychwanegol additional accompaniments cyfeiliant ychwanegol additional capital cyfalaf ychwanegol additional capitals cyfalaf ychwanegol additional component cydran ychwanegol additional components cydran ychwanegol additional force grym ychwanegol additional forces grym ychwanegol additional guidance canllaw pellach additional guidances canllaw pellach additional income incwm ychwanegol additional incomes incwm ychwanegol additional piece darn ychwanegol additional pieces darn ychwanegol additions adiad (in counting numbers) additions ychwanegiad (=thing added) additive adiol additive adiolyn (of numbers) additive ychwanegyn (of substance) additive bilingualism dwyieithrwydd cynyddol additive bilingualisms dwyieithrwydd cynyddol additive printing argraffu ychwanegol additives adiolyn (of numbers) additives ychwanegyn (of substance) address anerchiad (=speech) address annerch (a meeting) address cyfarch (a ball in sport) address cyfeiriad (on a letter etc) address cyfeirio (a letter) address mynd i'r afael (an issue) address a memory cyfeirio cof address generation cynhyrchu cyfeiriad address modification addasu cyfeiriad address register cofrestr cyfeiriadau address registers cofrestr cyfeiriadau addressing mode modd cyfeirio addressing modes modd cyfeirio adenosine diphosphate adenosin deuffosffad (ADP) adenosine diphosphates adenosin deuffosffad (ADP) adenosine monophosphate adenosin monoffosffad (AMP) adenosine monophosphates adenosin monoffosffad (AMP) adenosine triphosphate adenosin triffosffad (ATP) adenosine triphosphates adenosin triffosffad (ATP) adenyl cyclase adenyl cyclas adenyl cyclases adenyl cyclas adequate digonol adequate control rheolaeth ddigonol adequate controls rheolaeth ddigonol adequate movement symudiad digonol adequate movements symudiad digonol adequate size maint digonol adequate sizes maint digonol adhere adlynu (of substance) adhere cadw at (= keep to rules etc) adhere glynu (in general) adhere ymlynu (of person) adherence adlyniad (of substance) adherence ymlyniad (of person) adherences adlyniad (of substance) adherences ymlyniad (of person) adherent ymlynwr adherents ymlynwr adhesion adlyniad (of substance) adhesion ymlyniad (of person) adhesions adlyniad (of substance) adhesions ymlyniad (of person) adhesive adlyn (in technical usage) adhesive adlynol adhesive gludydd (=glue) adhesive cell cell adlynol adhesive cells cell adlynol adhesive dressing gorchudd adlynol adhesive dressings gorchudd adlynol adhesive power nerth adlynol adhesive powers nerth adlynol adhesive putty pwti adlynol adhesive strapping stribedyn adlynol adhesive strappings stribedyn adlynol adhesive tape tâp adlynol adhesive tapes tâp adlynol adhesives adlyn (in technical usage) adhesives gludydd (=glue) adiabatic adiabatig adipose blonegog adipose tissue meinwe bloneg adipose tissues meinwe bloneg adiposity blonegrwydd adjacent cyfagos adjacent angle ongl gyfagos adjacent angles ongl gyfagos adjacent face wyneb cyfagos adjacent faces wyneb cyfagos adjacent part darn cyfagos adjacent parts darn cyfagos adjacent side ochr gyfagos adjacent sides ochr gyfagos adjoined cydiedig adjoint atgyd adjoints atgyd adjourn gohirio adjournment gohiriad adjournments gohiriad adjudication beirniadaeth adjudications beirniadaeth adjudicator beirniad adjudicators beirniad adjugate atgydiol adjust addasu (=make suitable) adjust cymhwyso (=regulate) adjust intensity addasu dwysedd adjust the budget addasu'r gyllideb adjust the spectrometer cymhwyso'r sbectromedr adjustable cymwysadwy adjustable arm braich gymwysadwy adjustable arms braich gymwysadwy adjustable attachment atodyn cymwysadwy adjustable attachments atodyn cymwysadwy adjustable bevel befel cymwysadwy adjustable bevels befel cymwysadwy adjustable fence ffens gymwysadwy adjustable fences ffens gymwysadwy adjustable frame ffrâm gymwysadwy adjustable frames ffrâm gymwysadwy adjustable reamer agorell gymwysadwy adjustable reamers agorell gymwysadwy adjustable shelf silff gymwysadwy adjustable shelf support cynheiliad silffoedd cymwysadwy adjustable shelf supports cynheiliad silffoedd cymwysadwy adjustable shelfs silff gymwysadwy adjustable spanner sbaner cymwysadwy adjustable spanners sbaner cymwysadwy adjustable table bwrdd cymwysadwy adjustable tables bwrdd cymwysadwy adjustable wrench tyndro cymwysadwy adjustable wrenches tyndro cymwysadwy adjusted wedi'i chymhwyso (with feminine nouns) adjusted wedi'i gymhwyso (with masculine nouns) adjuster cymhwysydd adjusters cymhwysydd adjusting device dyfais gymhwyso adjusting devices dyfais gymhwyso adjusting mechanism peirianwaith cymhwyso adjusting mechanisms peirianwaith cymhwyso adjusting nut nyten gymhwyso adjusting nuts nyten gymhwyso adjusting rod rhoden gymhwyso adjusting rods rhoden gymhwyso adjusting screw sgriw gymhwyso adjusting screws sgriw gymhwyso adjusting strap strap gymhwyso adjusting straps strap gymhwyso adjustment cymhwysiad adjustments cymhwysiad administer gweini (=provide a remedy) administer gweinyddu (=manage) administrating system system weinyddu administrating systems system weinyddu administration gweiniad (=application of remedies) administration gweinyddiad (act of) administration gweinyddiaeth (=body or management) administration department adran weinyddu administration departments adran weinyddu administration system system weinyddu (in IT) administration systems system weinyddu (in IT) administrations gweiniad (=application of remedies) administrations gweinyddiad (act of) administrations gweinyddiaeth (=body or management) administrative gweinyddol administrative authority awdurdod gweinyddol administrative headquarters pencadlys gweinyddol administrative history hanes gweinyddol administrative procedure trefn weinyddol administrative procedures trefn weinyddol administrative region rhanbarth gweinyddol administrative regions rhanbarth gweinyddol administrative tribunal tribiwnlys gweinyddol administrative tribunals tribiwnlys gweinyddol administrative unit uned weinyddol administrative units uned weinyddol administrator gweinyddwr administrators gweinyddwr admiral llyngesydd admirals llyngesydd admiralty court llys morlys admiralty courts llys morlys admiration edmygedd admirations edmygedd admire edmygu admissible derbyniadwy admission cyfaddefiad (=acknowledgement) admission derbyniad (=person admitted) admissions cyfaddefiad (=acknowledgement) admissions derbyniad (=person admitted) admissions criteria meini prawf derbyn admissions policy polisi derbyn admissions procedure trefn dderbyn admissions procedures trefn dderbyn admittance mynediad (=process or right of entering) admittances mynediad (=process or right of entering) admixture cymysgiad admixtures cymysgiad admonish siarsio (clergy) admonition siars (to clergy) admonitions siars (to clergy) adolescence llencyndod adolescences llencyndod adolescent llencynnaidd adolescent person ifanc adolescents person ifanc adopt derbyn (a measure) adopt mabwysiadu (in general) adopted mabwysiedig adoption mabwysiad adoption agency asiantaeth fabwysiadu adoptionism mabwysiadaeth adoptionisms mabwysiadaeth adoptions mabwysiad adoptive parent rhiant mabwysiadol adoptive parents rhiant mabwysiadol adoration addoliad (in technical usage) adorations addoliad (in technical usage) adorn addurno adornment addurn adornments addurn adrenal cortex cortecs y chwarren adrenal adrenal cortex stimulating hormone HSCA hormon symbylu’r cortecs adrenal HSCA adrenal cortexes cortecs y chwarren adrenal adrenal gland chwarren adrenal adrenal glands chwarren adrenal adrenal medulla medwla y chwarren adrenal adrenal medullas medwla y chwarren adrenal adrenalin adrenalin adrenalins adrenalin adret llygad haul (=sonnenseite) adrets llygad haul (=sonnenseite) adsorb arsugno adsorbate arsugnyn adsorbates arsugnyn adsorbency arsugnedd adsorbent arsugnydd adsorbents arsugnydd adsorption arsugniad adsorptions arsugniad aduki beans ffa adwci adult oedolyn adult education addysg oedolion adult educations addysg oedolion adult expectations disgwyliadau oedolion adult form of the parasite oedolyn y parasit adult life bywyd oedolyn adult lifes bywyd oedolyn adult literacy and basic skills unit uned llythrennedd a sgiliau sylfaenol i oedolion adult literacy and basic skills units uned llythrennedd a sgiliau sylfaenol i oedolion adult stage ffurf oedolyn adult stages ffurf oedolyn adult training centre canolfan hyfforddi oedolion adult training centres canolfan hyfforddi oedolion adulterate difwyno adulteration difwyniad adulterations difwyniad adultery godineb adults oedolyn advance blaenswm (of money) advance blaenu (in fencing) advance cynnydd (in general) advance estyn (of ice-sheet etc) advance estyniad (of ice-sheet etc) advance symud ymlaen (=move forward) advance and retreat estyn ac encilio (of ice-sheet etc) advance factory ffatri barod advanced blaengar (of ideas, opinions) advanced datblygedig (=developed) advanced uwch (=higher) advanced disk filing system system ddisg-ffeilio uwch (ADFS) advanced disk filing systems system ddisg-ffeilio uwch (ADFS) advanced engineering peirianneg uwch advanced engineerings peirianneg uwch advanced further education addysg bellach uwch advanced further educations addysg bellach uwch advanced gas-cooler reactor adweithydd nwy-oeredig uwch advanced gas-cooler reactors adweithydd nwy-oeredig uwch advanced learner dysgwr uwch advanced learners dysgwr uwch advancement symudiad ymlaen (=movement forward) advancements symudiad ymlaen (=movement forward) advances blaenswm (of money) advances cynnydd (in general) advances estyniad (of ice-sheet etc) advantage mantais advantage law rheol fantais advantage laws rheol fantais advantageous promise addewid manteisiol advantageous promises addewid manteisiol advantages mantais advection llorfudiant advection fog niwl llorfudol advection fogs niwl llorfudol advections llorfudiant advenae estroniaid adventitious root adwreiddyn adventitious roots adwreiddyn adventive cone côn parasitig adventive cones côn parasitig adventure activity gweithgaredd antur adventure learning dysgu antur adventure play chwarae antur adventure playground maes chwarae antur adventure playgrounds maes chwarae antur adventure training hyfforddiant antur adventure trainings hyfforddiant antur adventurous activity gweithgaredd antur adversarial system system wrthwynebol adversarial systems system wrthwynebol adversely er gwaeth advertise hysbysebu advertisement hysbyseb advertisements hysbyseb advertising agency asiantaeth hysbysebu advertising agent asiant hysbysebu advertising agents asiant hysbysebu advertising campaign ymgyrch hysbysebu advertising campaigns ymgyrch hysbysebu advertising media cyfryngau hysbysebu advertising slogan slogan hysbysebu advertising slogans slogan hysbysebu advice cyngor advice and information service gwasanaeth cyngor a gwybodaeth advice and information services gwasanaeth cyngor a gwybodaeth advice slip slip hysbysu advice slips slip hysbysu advices cyngor adviser ymgynghorydd advisers ymgynghorydd advisory ymgynghorol advisory and peripatetic teacher athrawes ymgynghorol a chylchynol (female) advisory and peripatetic teacher athro ymgynghorol a chylchynol (male) advisory and peripatetic teachers athrawes ymgynghorol a chylchynol (female) advisory and peripatetic teachers athro ymgynghorol a chylchynol (male) advisory committee pwyllgor ymgynghorol advisory committee on education pwyllgor addysg ymgynghorol advisory committee on legal education and conduct pwyllgor ymgynghorol ar addysg ac ymddygiad cyfreithiol advisory committees pwyllgor ymgynghorol advisory council cyngor ymgynghorol advisory councils cyngor ymgynghorol advisory function swyddogaeth ymgynghorol advisory functions swyddogaeth ymgynghorol advisory officer swyddog cynghori advisory officers swyddog cynghori advisory service gwasanaeth cynghori advisory services gwasanaeth cynghori advocacy eiriolaeth advocate adfocad (=barrister in Scotland) advocate eiriolwr (=person who pleads for another) advocates adfocad (=barrister in Scotland) advocates eiriolwr (=person who pleads for another) advowry adfowri advowson adfowswn advowsons adfowswn adze neddyf adzes neddyf aeolian aeolaidd aeolian harp telyn awelon aeolian harps telyn awelon aeon aeon aeons aeon aerate awyru aerated awyrog aeration awyriad aeration stream llif awyru aeration streams llif awyru aerations awyriad aerator pump pwmp awyru aerator pumps pwmp awyru aerial awyrol aerial erial aerial photograph awyrlun aerial photographs awyrlun aerial ropeway rhaffordd awyr aerials erial aerobic aerobig aerobic respiration resbiradaeth aerobig aerobic respirations resbiradaeth aerobig aerobic running rhedeg aerobig aerobics aerobeg aerodynamics aerodynameg aerography aerograffiaeth aerology aeroleg aeronautics awyrennaeth aeronautics industry diwydiant awyrennau aerosol aerosol aerosol fixative sefydlyn aerosol aerosol fixatives sefydlyn aerosol aerosol inhaler anadlydd aerosol aerosol inhalers anadlydd aerosol aerosol spray chwistrell aerosol aerosols aerosol aerospace awyrofod aerospace industry diwydiant awyrofod aerospaces awyrofod aesthetic esthetig aesthetic quality priodoledd esthetig aestheticism esthetigaeth aestheticisms esthetigaeth aesthetics estheteg aetiological achosegol aetiological legend chwedl achosegol aetiological legends chwedl achosegol aetiology achoseg affair achos (=noteworthy thing) affair helynt (=notorious happening) affair mater (=public matter) affairs achos (=noteworthy thing) affairs helynt (=notorious happening) affairs mater (=public matter) affect affaith affect affeithio affection anwyldeb (=tenderness) affection serch (=fondness) affections anwyldeb (=tenderness) affections serch (=fondness) affective affeithiol affective disorder anhwylder affeithiol affective disorders anhwylder affeithiol affective domain maes affeithiol affective domains maes affeithiol affectivity affeithiolrwydd affects affaith afferent afferol afferent neuron niwron afferol afferent neurons niwron afferol affiliate cysylltu affiliated cyswllt affiliated member aelod cyswllt affiliated members aelod cyswllt affine affin affines affin affinity affinedd (in biochemistry) affirmation cadarnhad affirmations cadarnhad affix sicrhau afflation anadliad afflations anadliad affluent llednant (=tributary stream) affluent society cymdeithas gefnog affluents llednant (=tributary stream) afforestation coedwigo after-care ôl-ofal after-cares ôl-ofal after-effect ôl-effaith after-effects ôl-effaith after-image ôl-ddelwedd after-images ôl-ddelwedd after-sales service gwasanaeth ôl-werthu after-sales services gwasanaeth ôl-werthu after-school club clwb ar ôl ysgol after-school clubs clwb ar ôl ysgol after-school lesson gwers ar ôl ysgol after-school lessons gwers ar ôl ysgol afterbirth brych afterbirths brych afterglow ôl-dywyn afterglows ôl-dywyn aftermath canlyniad aftermaths canlyniad aftershock ôl-gryniad aftershocks ôl-gryniad against the grain yn erbyn y graen agape agape (=Christian fellowship) agapes agape (=Christian fellowship) agate agat agate ware crochenwaith agat agate wares crochenwaith agat agates agat age oed (of person) age oes (=period) age equivalent cyfatebiaeth oed age equivalents cyfatebiaeth oed age group grŵp oedran age groups grŵp oedran age hardening oed galedu age norm norm oed age norms norm oed age phase lefel age phase thesaurus thesawrws lefel age phases lefel age range ystod oedran age ranges ystod oedran age regression adlithro oed age structure adeiledd oedran age structures adeiledd oedran aged oedrannus (of person) ageing heneiddio ageing population poblogaeth sy'n heneiddio ageing populations poblogaeth sy'n heneiddio agency asiantaeth agenda agenda agendas agenda agent asiant (of person) agent cyfrwng (of force or effect) agents asiant (of person) agents cyfrwng (of force or effect) agglomerate athyrru (in geology) agglomerate llosg-garnedd (in geology) agglomerates llosg-garnedd (in geology) agglutinate cyfludo agglutinated cyfludedig agglutination cyfludiad agglutinations cyfludiad aggradation adraddiant aggradations adraddiant aggrade adraddu aggregate agreg (of stone) aggregate agregu (=combine into mass) aggregate cydgasglu (=collect together) aggregate cyfanred (in mathematics) aggregate cyfanredol (in mathematics) aggregate analysis dadansoddiad cyfanredol aggregate demand galw cyfanredol aggregate demands galw cyfanredol aggregate results canlyniadau cyfanredol aggregate schools budget cyllideb gyfanredol ysgolion aggregate schools budgets cyllideb gyfanredol ysgolion aggregate supply cyflenwad cyfanredol aggregates agreg (of stone) aggregates cyfanred (in mathematics) aggression ymddygiad ymosodol (of behaviour) aggression ymosodedd (in psychology) aggression ymosodiad (=attack) aggressions ymddygiad ymosodol (of behaviour) aggressions ymosodedd (in psychology) aggressions ymosodiad (=attack) aggressive ymosodol aggressor ymosodwr aggressors ymosodwr agile ystwyth agility ystwythder agitate cynhyrfu agitation cynnwrf agitations cynnwrf agitator cynhyrfwr agitators cynhyrfwr agnate agnawd agnostic agnostig agnosticism agnosticiaeth agnosticisms agnosticiaeth agony ing agranulocyte agranwlocyt agranulocytes agranwlocyt agrarian amaethyddol agrarian history hanes amaethyddiaeth agrarian reform diwygio amaethyddol agreed cytûn agreed policy polisi cytûn agreed syllabus maes llafur cytûn agreement cytundeb agreement trial treial cytuno agreement trials treial cytuno agreements cytundeb agricultural area ardal amaethyddol agricultural areas ardal amaethyddol agricultural deficiency area ardal o dangynhyrchu amaethyddol agricultural deficiency areas ardal o dangynhyrchu amaethyddol agricultural surplus area ardal o orgynhyrchu amaethyddol agricultural surplus areas ardal o orgynhyrchu amaethyddol agriculture amaethyddiaeth agricultures amaethyddiaeth agrostis maeswellt ague clefyd crynu agues clefyd crynu aid cymhorthdreth (tax) aid cymorth (in general) aid cynorthwyo aid and trade cymorth a masnach aide cymhorthiad (e.g. teacher's aide) aides cymhorthiad (e.g. teacher's aide) aiguille nodwydd aiguilles nodwydd ailment anhwylder ailments anhwylder aim aneliad (in sport) aim anelu (towards a target) aim nod (in education) aim a stroke anelu ergyd aim for the hurdle anelu at y glwyd aim the ball anelu'r bêl aim the volley anelu'r foli aiming error gwall anelu aiming errors gwall anelu aims and objectives nodau ac amcanion air aer (as a substance) air awyr (as a place) air cainc (in penillion singing) air crasu (clothes) air bladder chwysigen aer air bladders chwysigen aer air brush brwsh aer air brushs brwsh aer air column colofn aer air columns colofn aer air cool awyr-oeri air cored solenoid solenoid craidd aer air cored solenoids solenoid craidd aer air corridor coridor awyr air corridors coridor awyr air current cerrynt aer air currents cerrynt aer air extraction duct dwythell echdynnu aer air extraction ducts dwythell echdynnu aer air filter hidlydd aer air filters hidlydd aer air force llu awyr air forces llu awyr air grinder llifanydd aer air grinders llifanydd aer air hardening aergaledu air lock aerglo air locks aerglo air passage pibell aer air passages pibell aer air piracy awyr-ladrad air power grym awyrennol air powers grym awyrennol air pressure gwasgedd aer air pressures gwasgedd aer air raid cyrch awyr air raids cyrch awyr air resistance gwrthiant aer air resistances gwrthiant aer air route llwybr awyr air routes llwybr awyr air sac coden aer air sacs coden aer air survey arolwg awyr air with variations alaw ag amrywiadau air-borne troops awyrfilwyr air-condition aerdymheru air-conditioned aerdymherus air-conditioner aerdymherydd air-conditioners aerdymherydd air-cored coil coil craidd aer air-cored coils coil craidd aer air-cushion clustog aer air-cushions clustog aer air-mass aergorff air-raid shelter lloches cyrch awyr air-raid shelters lloches cyrch awyr air-track trac aer air-tracks trac aer aircraft carrier llong awyrennau aircraft carriers llong awyrennau aircraft industry diwydiant awyrennau airfield maes glanio airfields maes glanio airing cupboard cwpwrdd crasu dillad airing cupboards cwpwrdd crasu dillad airing rack rhesel grasu dillad airing racks rhesel grasu dillad airlift awyrgludiad airlifts awyrgludiad airline cwmni hedfan airlines cwmni hedfan airport maes awyr airports maes awyr airscrew aersgriw airscrews aersgriw airtight aerglos airway llwybr anadlu aisle eil aisled eiliog aisles eil akirah akirah al-Qad'r al-Qad'r al-Qad'rs al-Qad'r alabaster alabastr alabasters alabastr alalia alalia alalias alalia alanine alanin alanines alanin alarm larwm alarms larwm alb alb albatross albatros albedo albedo albinism albinedd albinisms albinedd albino albinaidd albino albino alborada alborada alboradas alborada album albwm albumen albwmen albumens albwmen albums albwm alchemist alcemydd alchemists alcemydd alchemy alcemeg alclad alclad alclads alclad alcohol alcohol alcoholic alcoholig alcoholic drink diod feddwol alcoholic drinks diod feddwol alcoholics alcoholig alcoholism alcoholiaeth alcoholisms alcoholiaeth alcohols alcohol alcove alcof alcoves alcof alder gwernen alderman henadur aldermans henadur alders gwernen aleatory aleatoraidd alellopathy alelopathi aleurone alewron aleurone layer haenen alewron aleurone layers haenen alewron aleurones alewron alfalfa maglys alfalfas maglys alga alga algas alga algebra algebra algebraic expression mynegiad algebraidd algebraic expressions mynegiad algebraidd algebraic number rhif algebraidd algebraic numbers rhif algebraidd algebraic skill sgìl algebraidd algebraic skills sgìl algebraidd algebras algebra algorithm algorithm algorithmic algorithmig algorithms algorithm alidade alidad alidades alidad alien estron alien priory allbriordy alienate arallu (property) alienate gelyniaethu (a person) alienation aralliad (of property etc) alienation gelyniaethiad (=cause to become hostile) alienation office swyddfa arallu alienation offices swyddfa arallu alienations aralliad (of property etc) alienations gelyniaethiad (=cause to become hostile) aliens estron align alinio align left alinio i'r chwith align right alinio i'r dde aligned aliniedig alignment aliniad alignments aliniad alimentary canal llwybr ymborth alimentary canals llwybr ymborth alimentation croniad eira (of snow) alimentations croniad eira (of snow) aliquot alicwot (in chemistry) aliquot cydrifol aliquot cyfnifer (in mathematics) aliquots alicwot (in chemistry) aliquots cyfnifer (in mathematics) alizarin brown brown alisarin alizarin browns brown alisarin alizarin crimson rhuddgoch alisarin alizarin crimsons rhuddgoch alisarin alizarin dye llifyn alisarin alizarin dyes llifyn alisarin alizarin green gwyrdd alisarin alizarin greens gwyrdd alisarin alizarin purple lake llif porffor alisarin alizarin purple lakes llif porffor alisarin alizarin violet fioled alisarin alizarin violets fioled alisarin alizarin yellow melyn alisarin alizarin yellows melyn alisarin alkali alcali alkali metal metel alcalïaidd alkali metals metel alcalïaidd alkaline alcalïaidd alkaline earth metal metel mwynol alcalïaidd alkaline earth metals metel mwynol alcalïaidd alkaline glaze gwydredd alcalïaidd alkaline glazes gwydredd alcalïaidd alkaline hydrolysis hydrolysis alcalïaidd alkalinity alcalinedd alkalis alcali alkane alcan alkanes alcan alkaptonuria alcaptonwria alkaptonurias alcaptonwria alkene alcen alkenes alcen alkybenzene alcybensen alkybenzenes alcybensen alkylate alcyleiddio alkylation alcyleiddiad alkylations alcyleiddiad alkyne alcyn alkynes alcyn all important hollbwysig all square sgwâr all squared i gyd wedi'u sgwario all squares sgwâr all-hard blade llafn cwbl-galed all-hard blades llafn cwbl-galed all-hard hacksaw blade llafn haclif cwbl-galed all-hard hacksaw blades llafn haclif cwbl-galed all-interval series cyfres pob cyfwng all-over pattern patrwm trosodd all-over patterns patrwm trosodd all-rounder chwaraewr amryddawn all-rounders chwaraewr amryddawn alla cappella alla cappella allantois alantois allegation honiad allegations honiad allege honni allegiance teyrngarwch allegiance homage gwrogaeth teyrngarwch allegiance homages gwrogaeth teyrngarwch allegiances teyrngarwch allegorical alegorïaidd allegory alegori allele alel allele frequency amlder alel alleles alel allelomorph alelomorff allelomorphs alelomorff allemande allemande allemandes allemande allergic alergaidd allergic reaction adwaith alergaidd allergic reactions adwaith alergaidd allergy alergedd alliance cynghrair alliances cynghrair allied cynghreiriol (in war) allied perthynol (=related) allied landing glaniad y cynghreiriaid allied landings glaniad y cynghreiriaid alligator jaw safn aligator alligator jaws safn aligator alliteration cyflythreniad allocate dosbarthu (students) allocate dyrannu (resources etc) allocation dosbarthiad (of students) allocation dyraniad (of resources etc) allocations dosbarthiad (of students) allocations dyraniad (of resources etc) allocative efficiency effeithlonrwydd dyrannol allogenic alogenig allometric growth twf alometrig allometric growths twf alometrig allopolyploid alopolyploid allopolyploidy alopolyploidi allot pennu allotetraploid alotetraploid allotment rhandir allotments rhandir allotrope alotrop allotropes alotrop allotropic alotropig allotropy alotropaeth allow caniatáu allowance lwfans allowances lwfans alloy aloi alloy steel dur aloi alloy steels dur aloi alloying elements elfennau aloi allspice pupur Jamaica allspices pupur Jamaica alluvial llifwaddodol alluvial deposit llifwaddod alluvial deposits llifwaddod alluvial fan bwa llifwaddod alluvial fans bwa llifwaddod alluvial plain gwastatir llifwaddod alluvial plains gwastatir llifwaddod alluvium llifwaddod alluviums llifwaddod ally cynghreiriad allylics alylicion almighty hollalluog almond cneuen almon almond essence rhinflas almon almond essences rhinflas almon almonds cneuen almon almoner elusennwr almoners elusennwr almonry elusenfa alms elusen almshouse elusendy almshouses elusendy alocryl alocryl alocryl medium cyfrwng alocryl alocryl mediums cyfrwng alocryl alocryls alocryl along the grain ar hyd y graen alp alp alpenhorn alpgorn alpenhorns alpgorn alpha particle gronyn alffa alpha particles gronyn alffa alphabet gwyddor alphabet agencies adrannau'r wyddor alphabetic method dull a, b, c alphabetic methods dull a, b, c alphabetical order trefn y wyddor alphabetical orders trefn y wyddor alphabets gwyddor alphameric alffamerig alphanumeric alffaniwmerig alpine alpaidd alpine butterfly cwlwm canolwr altar allor altar piece allorlun altar pieces allorlun altarage allordal altarages allordal altars allor altars once so privileged allorau mawr eu braint alter sensitivity newid sensitifrwydd alteration newid alteration line llinell newid alteration lines llinell newid alterations newid alternate aryneilio alternate bob yn ail (in general) alternate eiledol (in technical usage) alternate angle ongl eiledol alternate angles ongl eiledol alternate bud blaguryn eiledol alternate buds blaguryn eiledol alternate grasp gafael bob yn ail alternate layers haenau eiledol alternating eiledol alternating current cerrynt eiledol (A.C.) alternating currents cerrynt eiledol (A.C.) alternation of generations eilededd cenedlaethau alternative amgen (=preferable) alternative arall (=other) alternative dewis alternative forms of care mathau eraill o ofal alternative hypothesis rhagdybiaeth arall alternative medicine meddygaeth amgen alternative medicines meddygaeth amgen alternative narrative naratif arall alternative narratives naratif arall alternative society cymdeithas amgen alternative technology technoleg amgen alternative worship addoliad amgen alternative worships addoliad amgen alternatives dewis alternativo alternativo alternator eiliadur alternators eiliadur altimeter altimedr altimeters altimedr altiplanation uwchwastadiant altiplanations uwchwastadiant altitude uchder altitudes uchder altmode eilfodd altmodes eilfodd alto alto alto clarinet clarinét alto alto clarinets clarinét alto alto flute ffliwt alto alto flutes ffliwt alto alto-relievo cerfwedd uchel altocumulus altocumulus altostratus altostratus alum alwm alumina alwmina aluminas alwmina aluminium alwminiwm (Al) aluminium alloy aloi alwminiwm aluminium bronze efydd alwminiwm aluminium bronzes efydd alwminiwm aluminium chloride alwminiwm clorid aluminium chlorides alwminiwm clorid aluminium foil ffoil alwminiwm aluminium foils ffoil alwminiwm aluminium oxide alwminiwm ocsid aluminium oxide paper papur alwminiwm ocsid aluminium oxide papers papur alwminiwm ocsid aluminium oxides alwminiwm ocsid aluminium screw sgriw alwminiwm aluminium screws sgriw alwminiwm aluminium track trac alwminiwm aluminium tracks trac alwminiwm aluminiums alwminiwm (Al) alums alwm alveolar alfeolaidd (of lungs) alveolar gorfannol (of gums) alveolar bone asgwrn y gorfant alveolar bones asgwrn y gorfant alveolus alfeolws amalgam amalgam amalgamate cyfuno amalgamation cyfuniad amalgamations cyfuniad amalgams amalgam amanuensis ysgrifennydd amateur amatur amateurism amaturiaeth amateurisms amaturiaeth amateurs amatur ambassador llysgennad ambassadors llysgennad amber ambr (=fossilized resin) amber melyngoch (enamelling colour) amber brown melynfrown (enamelling colour) amber browns melynfrown (enamelling colour) ambers ambr (=fossilized resin) ambers melyngoch (enamelling colour) ambiguous amwys ambulance ambiwlans ambulance driver gyrrwr ambiwlans ambulance drivers gyrrwr ambiwlans ambulances ambiwlans ambulant yn gallu cerdded ambulatory cerddedfa ambush rhagod ambushs rhagod amen amen amen cadence diweddeb amen amen cadences diweddeb amen amend diwygio amendment gwelliant (to a resolution) amendment newid (to a text) amendments gwelliant (to a resolution) amendments newid (to a text) amenity mwynder amens amen amerce amersu amercement amersiad amercements amersiad americium americiwm (Am) americiums americiwm (Am) amicable grant grant gwirfoddol amicable grants grant gwirfoddol amicable loan benthyciad cyfeillgar amicable loans benthyciad cyfeillgar amice amis amices amis amide amid amides amid amination amineiddiad aminations amineiddiad amine amin amines amin amino acid asid amino amino acids asid amino amino plastics aminoblastigion amino resins resinau amino amitosis amitosis ammeter amedr ammeters amedr ammonia amonia ammoniac amoniac ammonias amonia ammonification amoneiddio ammonium chloride amoniwm clorid ammonium chlorides amoniwm clorid ammonium dichromate amoniwm deucromad ammonium dichromates amoniwm deucromad ammonium sulphide amoniwm sylffid ammonium sulphides amoniwm sylffid ammonolysis amonolysis amnesia amnesia amnesias amnesia amnesty amnest amnion amnion amnions amnion amniotic fluid hylif amniotig amniotic fluids hylif amniotig amniotic sac cwd amniotig amniotic sacs cwd amniotig amoeboid amoebaidd amorphous amorffaidd amorphous peat mawn amorffaidd amorphous peats mawn amorffaidd amount cyfanswm (=total) amount swm (=quantity) amount of substance swm y sylwedd (in chemistry) amount owing swm sy'n ddyledus amount owings swm sy'n ddyledus amounts cyfanswm (=total) amounts swm (=quantity) ampere amper amperes amper ampersand ampersand (&) ampersands ampersand (&) amphibian amffibiad amphibians amffibiad amphibious amffibiaidd amphibrach corfan amgyrch amphibraches corfan amgyrch amphictyony amffictyoni amphipathic amffipathig amphiprostyle amffiprostyl amphiprostyles amffiprostyl amphitheatre amffitheatr amphitheatres amffitheatr amphoteric amffoterig amphoteric character nodwedd amffoterig amphoteric characters nodwedd amffoterig amplification mwyhad amplifications mwyhad amplifier mwyhadur amplifiers mwyhadur amplify mwyhau amplitude arg (in mathematics) amplitude osgled (in physics) amplitude envelope chwydd-amlen amplitude envelopes chwydd-amlen amplitude modulated carrier wave ton gario wedi'i modylu'n osgledol amplitude modulated carrier waves ton gario wedi'i modylu'n osgledol amplitude modulation modyliad osgled amplitude modulations modyliad osgled amplitude swing osgiliad (electronics) amplitude swings osgiliad (electronics) amplitudes arg (in mathematics) amplitudes osgled (in physics) ampoule ampwl ampoules ampwl amputate trychu amputation trychiad amputations trychiad amyl acetate amyl asetad amyl acetates amyl asetad amylase amylas amylases amylas amyloplast amyloplast amyloplasts amyloplast anabatic anabatig anabolic anabolig anabolism anabolaeth anabolisms anabolaeth anacrusis anacrwsis anacrustic anacrwstig anaemia anaemia anaemias anaemia anaerobic anaerobig anaerobic respiration resbiradaeth anaerobig anaerobic respirations resbiradaeth anaerobig anaerobic running rhedeg anaerobig anaesthetic anaesthetig anaesthetics anaestheteg anaesthetics anaesthetig anaesthetist anaesthetegydd anaesthetists anaesthetegydd anal rhefrol analgesic poenleddfol analgesic poenleddfwr analgesics poenleddfwr analogical cydweddiadol analogous analogaidd (of computer or electronic process) analogous cydweddol (=partially similar) analogue analog analogue computer cyfrifiadur analog (ADC) analogue computers cyfrifiadur analog (ADC) analogue signal signal analog analogue signals signal analog analogues analog analogy cydweddiad analyse dadansoddi analyser dadansoddydd analysers dadansoddydd analysis dadansoddiad analysis of variance dadansoddiad amrywiant analyst dadansoddwr analysts dadansoddwr analytical dadansoddol analytical chemistry cemeg ddadansoddol analytical continuation parhad dadansoddol analytical continuations parhad dadansoddol analytical notes nodiadau dadansoddol analytical orientation gogwydd dadansoddol analytical orientations gogwydd dadansoddol analytical study astudiaeth ddadansoddol anapaest corfan cyrch dyrchafedig anapaests corfan cyrch dyrchafedig anaphase anaffas anaphases anaffas anaphylactic shock sioc anaffylactig anaphylactic shocks sioc anaffylactig anarchism anarchiaeth anarchisms anarchiaeth anarchist anarchaidd anarchist anarchydd anarchists anarchydd anarchy anarchiaeth anastomosis anastomosis anatomical anatomegol anatomical direction cyfeiriad anatomegol anatomical directions cyfeiriad anatomegol anatomy anatomeg (as science) anatomy anatomi (=body) anatta anatta (Pali = anatman Sanskrit) anattas anatta (Pali = anatman Sanskrit) ancestor hynafiad ancestor worship addoli cyndadau ancestors hynafiad ancestral hynafiadol ancestral traits nodweddion hynafiadol ancestry llinach anchor angor anchor bracket braced angor anchor brackets braced angor anchorage angorfa anchorages angorfa anchorite ancr anchorites ancr anchors angor anchovy brwyniad anchovy essence rhinflas brwyniaid anchovy essences rhinflas brwyniaid ancient hynafol ancient history hanes yr hen fyd ancient monument heneb ancient monuments heneb ancillary ategol ancillary industry diwydiant ategol ancillary staff staff ategol ancillary support cefnogaeth ategol ancillary supports cefnogaeth ategol androecium androeciwm androeciums androeciwm anecdotal art celfyddyd storïol anecdotal arts celfyddyd storïol anemometer anemomedr anemometers anemomedr anemophily anemoffiledd aneroid aneroid aneroid barometer baromedr aneroid aneroid barometers baromedr aneroid aneroids aneroid aneuploid anewploid aneuploids anewploid aneurine anewrin aneurines anewrin angel angel angelica angelica angelicas angelica angels angel anger management rheolaeth dicter anger managements rheolaeth dicter angiosperm angiosberm angiosperms angiosberm angle ongl angle ongli angle bead glain ongl angle beads glain ongl angle bracket braced ongl angle brackets braced ongl angle bridle bagl ongl angle bridles bagl ongl angle dovetail joint uniad cynffonnog onglog angle dovetail joints uniad cynffonnog onglog angle halving haneru ongl angle halving joint uniad haneru ongl angle halving joints uniad haneru ongl angle headstand pensafiad plyg angle headstands pensafiad plyg angle iron haearn ongl angle irons haearn ongl angle of contact ongl gyswllt angle of cutting tool ongl erfyn torri angle of depression ongl ostwng angle of deviation ongl wyriad angle of elevation ongl godiad angle of friction ongl ffrithiant angle of grazing incidence ongl prin drawiad angle of incidence ongl drawiad angle of inclination ongl oledd angle of intersection ongl groestoriad angle of obliquity ongl letrawsedd angle of projection ongl dafluniad angle of reflection ongl adlewyrchiad angle of refraction ongl blygiant angle of rotation ongl gylchdro angle of turning tool ongl erfyn turnio angle plate plât ongl angle plates plât ongl angle projection tafluniad ongl angle projections tafluniad ongl angle shot ergyd onglog angle shots ergyd onglog angled return dychweliad lletraws angled returns dychweliad lletraws angler fish cythraul môr angler fishs cythraul môr angles ongl angora angora angoras angora angular onglaidd (of velocity etc) angular onglog (having angles) angular deformation anffurfiad onglog angular deformations anffurfiad onglog angular face wyneb onglog angular faces wyneb onglog angular frequency amledd cylchdro angular magnification chwyddhad onglog angular magnifications chwyddhad onglog angular momentum momentwm onglaidd angular momentums momentwm onglaidd angular period cyfnod cylchdro angular periods cyfnod cylchdro angular perspective persbectif onglog angular perspectives persbectif onglog angular spread ymlediad onglog angular spreads ymlediad onglog angular thread edau onglog angular threads edau onglog angular velocity cyflymder onglaidd angularity onglogrwydd anharmonic anharmonig anharmonics anharmonig anhydrate anhydrad anhydrates anhydrad anhydride anhydrid anhydrides anhydrid anhydrous anhydrus anicca anicca (Pali = anitya Sanskrit) aniccas anicca (Pali = anitya Sanskrit) aniline anilin aniline colours lliwiau anilin aniline dyes llifion anilin anilines anilin animal anifail animal anifeilaidd animal fat braster anifail animal fats braster anifail animal fibre ffibr anifail animal fibres ffibr anifail animal form ffurf anifeiliaid animal forms ffurf anifeiliaid animal glue glud anifail animal glues glud anifail animal marionette marionét anifail animal marionettes marionét anifail animal suffering dioddefaint anifeiliaid animal sufferings dioddefaint anifeiliaid animals anifail animate animeiddio animation animeiddiad animations animeiddiad animator animeiddydd animators animeiddydd animism animistiaeth animisms animistiaeth animist animistiad animistic animistaidd animists animistiad anion anion anionic anionig anions anion ankle ffêr ankles ffêr anklewarmers socasau annal blwyddnod annals blwyddnod annates anodau (=first fruits) anneal anelio annelid anelid annelids anelid annex cyfeddiannu annexation cyfeddiant annexations cyfeddiant annexe atodiad (to document) annexe rhandy (to building) annexes atodiad (to document) annexes rhandy (to building) annihilate chwalu'n llwyr (in metaphorical sense) annihilate difodi (in literal sense) anniversary pen-blwydd annotate anodi annotated drawing lluniad anodedig annotated drawings lluniad anodedig annotated map map anodedig annotated maps map anodedig annotated sketch braslun anodedig annotated sketch map llinfap wedi’i labelu â nodiadau annotated sketch maps llinfap wedi’i labelu â nodiadau annotated sketches braslun anodedig annotated visual records cofnodion gweledol gyda nodiadau annotation anodiad annotations anodiad annual blodyn unflwydd (flower) annual blynyddol (=occurring every year) annual unflwydd (=lasting for one year) annual premium premiwm blynyddol annual premiums premiwm blynyddol annual rainfall glawiad blynyddol annual rainfalls glawiad blynyddol annual ring cylch blynyddol annual rings cylch blynyddol annual thickening tewychu unflwydd annual wage cyflog blynyddol annual wages cyflog blynyddol annuals blodyn unflwydd (flower) annuity blwydd-dal annul dirymu annular anwlar (in physics) annular modrwyol (=ring-shaped) annular lignification ligneiddiad modrwyol annular lignifications ligneiddiad modrwyol annulate modrwywedd annulment dirymiad annulments dirymiad annulus anwlws (in physics) annulus modrwy (in biology) annunciation cyfarchiad annunciations cyfarchiad anode anod anodes anod anodic anodig anodic oxidation ocsidiad anodig anodic oxidations ocsidiad anodig anodize anodeiddio anoint eneinio anointed eneiniog anointing eneiniad anointings eneiniad anomalous afreolaidd (in general) anomalous anomalus (in astronomy) anomalous anrheolaidd (in biology etc) anomaly achos anrheolaidd (in biology etc) anomaly anghysondeb (in general) anomaly anomaledd (in astronomy) anonymity anhysbysrwydd anorexia nervosa anorecsia nerfosa anorexia nervosas anorecsia nerfosa anorexic anorecsig anoxia anocsia anoxias anocsia answer ateb answers ateb antacid gwrthasid antacids gwrthasid antagonistic gwrthweithiol (of muscles) antagonistic muscle pairs parau gwrthweithiol o gyhyrau antecedent rhagalaw (in canon) antecedent rhagflaenydd (in general) antecedent rhagosod (e.g. drainage) antecedents rhagalaw (in canon) antecedents rhagflaenydd (in general) antechamber rhagsiambr antechambers rhagsiambr antenatal cyn-geni antenatal care gofal cyn-geni antenatal cares gofal cyn-geni antenatal clinic clinig cyn-geni antenatal clinics clinig cyn-geni antenatal parents rhieni sy'n disgwyl antenna antena (=aerial) antenna teimlydd (of anthropod) antennas antena (=aerial) antennas teimlydd (of anthropod) antennule antennyn antennules antennyn anterior pen blaen anterior root nerfwreiddyn blaen (of nerve) anterior roots nerfwreiddyn blaen (of nerve) anteriors pen blaen anthem anthem anthems anthem anther anther anthers anther anthocyanin anthocyanin anthocyanins anthocyanin anthoxanthin anthocsanthin anthoxanthins anthocsanthin anthracite glo carreg anthracites glo carreg anthranilic acid asid anthranilig anthranilic acids asid anthranilig anthropic principle egwyddor anthropig anthropic principles egwyddor anthropig anthropogenic anthropogenig anthropoid anthropoid anthropoids anthropoid anthropology anthropoleg anthropometric anthropometrig anthropometrics anthropometreg anthropomorphic anthropomorffaidd anthropomorphism anthropomorffaeth anthropomorphisms anthropomorffaeth anti bonding gwrthfondio (of orbitals) anti-Comintern pact pact gwrth-Gomintern anti-Comintern pacts pact gwrth-Gomintern anti-European gwrth-Ewropeaidd anti-Semitism gwrth-Semitiaeth anti-bacterial gwrthfacteria (of finish) anti-caking agent cyfrwng gwrthdalpio anti-caking agents cyfrwng gwrthdalpio anti-capillary groove rhigol wrthgapilari anti-capillary grooves rhigol wrthgapilari anti-catholic gwrth-Babyddol anti-clericalism gwrthglerigaeth anti-clericalisms gwrthglerigaeth anti-coagulant cyffur gwrthgeulo anti-coagulants cyffur gwrthgeulo anti-colonialist gwrthdrefedigaethol anti-corrosion agent cyfrwng gwrthgyrydu anti-corrosion agents cyfrwng gwrthgyrydu anti-discrimination gwrthwahaniaethol anti-dust chalk sialc di-lwch anti-dust chalks sialc di-lwch anti-fascist gwrth-ffasgaidd anti-flame gwrth-fflam anti-friction gwrth-ffrithiant anti-friction grease saim gwrth-ffrithiant anti-friction greases saim gwrth-ffrithiant anti-friction metal metel gwrth-ffrithiant anti-friction metals metel gwrth-ffrithiant anti-inflammatory gwrthlidiol (of drug) anti-inflationary gwrthchwyddiannol anti-moth gwrthwyfyn anti-racism gwrth-hiliaeth anti-racisms gwrth-hiliaeth anti-racist education addysg wrth-hiliol anti-racist educations addysg wrth-hiliol anti-slavery movement mudiad gwrthgaethwasiaeth anti-slavery movements mudiad gwrthgaethwasiaeth anti-slip gwrth-lithr anti-snake bar braich sadio anti-snake bars braich sadio anti-terrorism gwrthderfysgaeth anti-terrorisms gwrthderfysgaeth anti-terrorist gwrthderfysgwr anti-terrorist device dyfais wrthderfysgol anti-terrorist devices dyfais wrthderfysgol anti-terrorists gwrthderfysgwr anti-trades gwrthwyntoedd cyson antibiotic gwrthfiotig antibiotics gwrthfiotig antibody gwrthgorff anticipate rhagdaro (in music) anticipate rhagweld (in general) anticipate response rhagweld ymateb anticipation rhagdrawiad (of musical note) anticipations rhagdrawiad (of musical note) anticlerical gwrthglerigol anticlinal anticlinol anticline anticlin anticlines anticlin anticlinorium anticlinoriwm anticlinoriums anticlinoriwm anticlockwise gwrthglocwedd anticlockwise direction cyfeiriad gwrthglocwedd anticlockwise directions cyfeiriad gwrthglocwedd anticodon gwrthgodon anticodons gwrthgodon anticyclone antiseiclon anticyclones antiseiclon anticyclonic antiseiclonig antidepressant gwrthiselydd (drug) antidepressants gwrthiselydd (drug) antidiuretic gwrthddiwretig antidiuretic hormone hormon gwrthddiwretig antidiuretic hormones hormon gwrthddiwretig antidote gwrthwenwyn antidotes gwrthwenwyn antiemetic gwrthgyfogydd (drug) antiemetics gwrthgyfogydd (drug) antiepileptic cyffur atal epilepsi (drug) antiepileptics cyffur atal epilepsi (drug) antigen antigen antigens antigen antihypertensive gwrthorbwysol (of drug) antihypotensive gwrthisbwysol (of drug) antilogarithm gwrthlogarithm antilogarithms gwrthlogarithm antimony antimoni (Sb) antinodal antinodol antinode antinod antinodes antinod antinomian antinomaidd antinomian antinomiad antinomianism antinomiaeth antinomianisms antinomiaeth antinomians antinomiad antioxidant gwrthocsidydd antioxidants gwrthocsidydd antipapal gwrth-Babaidd antiparallel gwrthbaralel antiphase gwrthwedd (out of phase) antiphon antiffon antiphons antiffon antipope gwrthbab antipopes gwrthbab antiproton antiproton antiprotons antiproton antiquarian hynafiaethol antiquary hynafiaethydd antique hynafol antique hynafolyn antique cymbals symbalau Groeg antique paper papur bras antique papers papur bras antique shop siop hen bethau antique shops siop hen bethau antiques hynafolyn antiquity hen fyd (=ancient times) antiquity hynafiaeth (of objects or customs) antiseptic antiseptig antiseptics antiseptig antisocial behaviour ymddygiad gwrthgymdeithasol antisocial behaviours ymddygiad gwrthgymdeithasol antistatic gwrthstatig antisymmetric gwrthgymesur antisymmetry gwrthgymesuredd antithesis antithesis antivivisection gwrthfywddyraniad antivivisections gwrthfywddyraniad anuria anwria anurias anwria anus anws anvil eingion anvil horn scrolls heyrn sgrôl anvils eingion anxiety pryder (non-technical usage) aorta aorta aortas aorta aortic arch bwa aortig aortic arches bwa aortig aortic body corffyn aortig apart ar wahân apartheid apartheid apartheids apartheid apartment fflat apartments fflat apathy apathi aperient carthydd aperients carthydd aperiodic digyfnod aperture agorfa apertures agorfa apetalous dibetal apex apig apexes apig apgar score chart siart sgôr apgar apgar score charts siart sgôr apgar aphasia affasia aphasias affasia aphelion affelion aphelions affelion aphid pryf glas aphids pryf glas apical apigol apical bud blaguryn apigol apical buds blaguryn apigol apical dominance trechedd apigol apical dominances trechedd apigol apical meristem meristem apigol apical meristems meristem apigol apnoea apnoea apnoeas apnoea apocalypse datguddiad apocalypses datguddiad apocalyptic apocalyptaidd apocalyptic apocalypteg apocalyptic literature llenyddiaeth apocalyptaidd apocalyptic literatures llenyddiaeth apocalyptaidd apocalyptics apocalypteg apocarpous apocarpog apocrypha apocryffa apocryphal new testament testament newydd apocryffaidd apocryphal new testaments testament newydd apocryffaidd apocryphas apocryffa apogean tide llanw apogeaidd apogean tides llanw apogeaidd apogee apoge apogees apoge apologetic diffyniadol (of reasoned defence) apologetics diffyniadaeth apologetist diffynnydd apologetists diffynnydd apology diffyniad (=defence) apology of the Commons cyfiawnhad y Senedd apophthegm doethair apophthegms doethair apoplast apoplast apoplasts apoplast aposematic rhybuddiol apostasy gwrthgiliad apostate gwrthgiliol apostate gwrthgiliwr apostates gwrthgiliwr apostle apostol apostles apostol apostleship apostoliaeth apostleships apostoliaeth apostolic apostolaidd apostolicity apostoligrwydd apostrophe collnod apostrophes collnod apoyando apoyando apparatus cyfarpar apparent amlwg (=obvious) apparent ymddangosiadol (=seeming) apparent ymddangosol (in physics) apparent motion of the moon mudiant ymddangosol y lleuad apparent movement symudiad ymddangosol apparent movements symudiad ymddangosol apparent time amser haul apparent times amser haul appeal apelio appeal apêl appeal court llys apêl appeal courts llys apêl appeals apêl appear ymddangos appearance ymddangosiad appearances ymddangosiad appease dyhuddo appeasement dyhuddiad appeasement policy polisi dyhuddo appeasements dyhuddiad appellant apelydd appellants apelydd appendicitis llid y pendics appendicular skeleton sgerbwd atodol appendicular skeletons sgerbwd atodol appendix atodiad (to a document) appendixes atodiad (to a document) appetite archwaeth appetite centre canolfannyn ymborthi appetite centres canolfannyn ymborthi appetites archwaeth appetizer blasyn appetizers blasyn appetizing blasus apple Charlotte Charlotte afal apple core craidd afal apple corer digreiddiwr afal apple corers digreiddiwr afal apple cores craidd afal apple dumpling twmplen afal apple dumplings twmplen afal apple sauce saws afal apple sauces saws afal appliance offeryn appliances offeryn applicability cymhwysedd applicable cymwys application cais (=formal request) application cymhwysiad (=the use to which something can be put) application dyfalbarhad (=diligence) application form ffurflen gais application forms ffurflen gais application of science cymhwysiad o wyddoniaeth applications cais (=formal request) applications cymhwysiad (=the use to which something can be put) applications dyfalbarhad (=diligence) applications software meddalwedd rhaglenni applications softwares meddalwedd rhaglenni applied cymhwysol (as a subject of study) applied gosod (=put on) applied art celfyddyd gymhwysol applied arts celfyddyd gymhwysol applied braid brêd gosod applied braids brêd gosod applied ethics moeseg gymhwysol applied facing wynebyn gosod applied facings wynebyn gosod applied flounce fflowns osod applied flounces fflowns osod applied force grym gosod applied forces grym gosod applied forms ffurfiau gosod applied geography daearyddiaeth gymhwysol applied lipping ymyl osod applied lippings ymyl osod applied mathematics mathemateg gymhwysol applied moulding mowldin gosod applied mouldings mowldin gosod applied ornament addurn gosod applied ornaments addurn gosod applied resist gwrthydd gosod applied resists gwrthydd gosod appliqué appliqué appliqués appliqué apply cymhwyso at (=make use of as relevant or suitable) apply gwneud cais (=make a formal request) apply rhoi (=set, put) apply ymroi (=devote oneself) apply paint peintio apply polish llathru appoggiatura appoggiatura appoggiaturas appoggiatura appointment apwyntiad (to see someone) appointment penodiad (to a post) appointments apwyntiad (to see someone) appointments penodiad (to a post) appraisal gwerthusiad appraisal procedures trefn werthuso appraisal scheme cynllun gwerthuso appraisal schemes cynllun gwerthuso appraisal system system werthuso appraisal systems system werthuso appraisals gwerthusiad appraise gwerthuso appreciate gwerthfawrogi appreciation arbrisiant (in value) appreciation gwerthfawrogiad (=favourable recognition) appreciations arbrisiant (in value) appreciations gwerthfawrogiad (=favourable recognition) apprehend dirnad (=understand) apprehend restio (=arrest) apprehension dirnadaeth (=understanding) apprehensions dirnadaeth (=understanding) apprentice prentis apprentices prentis apprenticeship prentisiaeth apprenticeships prentisiaeth appresorium apresoriwm appresoriums apresoriwm approach agosáu (=come near) approach dull (=way of dealing with person or thing) approach dyfodfa (to a house etc) approach mynd at (a person) approach ymdrin â (a matter) approach run atredeg approach run atrediad approach runs atrediad approach to history ymagwedd at hanes approaches dull (=way of dealing with person or thing) approaches dyfodfa (to a house etc) appropriate adfeddu (money, property etc) appropriate priodol (in performance criteria) appropriate accuracy manwl gywirdeb priodol appropriate activity gweithgaredd priodol appropriate behaviour ymddygiad addas appropriate behaviours ymddygiad addas appropriate decision penderfyniad priodol appropriate decisions penderfyniad priodol appropriate direction cyfeiriad priodol appropriate directions cyfeiriad priodol appropriate dress gwisg briodol appropriate evidence tystiolaeth briodol appropriate evidences tystiolaeth briodol appropriate illustration darluniad pwrpasol (=drawing) appropriate illustration eglureb bwrpasol (=explanation) appropriate illustrations darluniad pwrpasol (=drawing) appropriate illustrations eglureb bwrpasol (=explanation) appropriate method dull priodol appropriate methods dull priodol appropriate position safle priodol appropriate positions safle priodol appropriate response ymateb priodol appropriate responses ymateb priodol appropriate setting cyd-destun priodol appropriate settings cyd-destun priodol appropriate source ffynhonnell briodol appropriate sources ffynhonnell briodol appropriate use of the body defnyddio'r corff yn briodol appropriate vocabulary geirfa briodol appropriated tithe degwm adfedd appropriated tithes degwm adfedd appropriately pitched priodol o ran anhawster appropriation adfeddiad appropriations adfeddiad approval label label cymeradwyaeth approval labels label cymeradwyaeth approver trwyddedwr approvers trwyddedwr approximate bras approximate brasamcanu approximate answer ateb bras (=rough answer) approximate answers ateb bras (=rough answer) approximately tua approximation brasamcan approximations brasamcan apricot bricyllen apricots bricyllen apron ffedog apron stage llwyfan ffedog apron stages llwyfan ffedog aprons ffedog apse cromfan apses cromfan apsidal cromfannol apsidal tower tŵr cromfannol apsidal towers tŵr cromfannol aptitude tueddfryd aptitude test prawf tueddfryd aptitude tests prawf tueddfryd aptitudes tueddfryd aquarium acwariwm aquariums acwariwm aquatic dyfrol aquatic feeders bwytawyr dyfrol aquatint acwatint aquatints acwatint aqueduct traphont ddŵr aqueducts traphont ddŵr aqueous dyfrllyd aqueous humour hylif dyfrllyd aqueous humours hylif dyfrllyd aqueous silver nitrate arian nitrad dyfrllyd aqueous silver nitrates arian nitrad dyfrllyd aqueous sodium hydroxide sodiwm hydrocsid dyfrllyd aqueous sodium hydroxides sodiwm hydrocsid dyfrllyd aqueous solution hydoddiant dyfrllyd aqueous solutions hydoddiant dyfrllyd aquifer dyfrhaen aquifers dyfrhaen arab spring sbring arab arab springs sbring arab arabesque arabésg arabesques arabésg arable âr arable land tir âr arable lands tir âr arbitrariness mympwy arbitrary mympwyol arbitrary constant cysonyn mympwyol arbitrary constants cysonyn mympwyol arbitrary unit uned fympwyol arbitrary units uned fympwyol arbitrate cyflafareddu arbitration cyflafareddiad arbitrations cyflafareddiad arbitrator cyflafareddwr arbitrators cyflafareddwr arbor arbor arbor chuck crafanc arbor arbor chucks crafanc arbor arbor hole twll arbor arbor holes twll arbor arboriculture coedyddiaeth arboricultures coedyddiaeth arbors arbor arbuscule arbwsciwl arbuscules arbwsciwl arc arc arc cutting torri arc arc of contact arc gyffwrdd arc welding arc-weldio arcade arcêd arcades arcêd arch bwa (in general) arch pont (in dancing) arch pontio arch form ffurf bwa arch forms ffurf bwa arch in situ bwa rhededog archaeology archaeoleg archaic hynafol archaism hynafiaeth (in general) archaism hynafoliad (in religion) archaisms hynafiaeth (in general) archaisms hynafoliad (in religion) archangel archangel archangels archangel archbishop archesgob archbishops archesgob archduchess archdduges archduchy archddugiaeth archegonium archegoniwm archegoniums archegoniwm archer saethwr archers saethwr archery saethyddiaeth arches bwa (in general) arches pont (in dancing) archetype archdeip archetypes archdeip architect pensaer architects pensaer architectural pensaernïol architectural art celfyddyd bensaernïol architectural arts celfyddyd bensaernïol architectural style arddull pensaernïol architectural styles arddull pensaernïol architecture pensaernïaeth architectures pensaernïaeth architrave architraf architrave moulding mowldin architraf architrave mouldings mowldin architraf architraves architraf archive archif archive archifo archive record cofnod archifol archive records cofnod archifol archive tape tâp archifol archive tapes tâp archifol archives archif archiving system system archifo archiving systems system archifo archivist archifydd archivists archifydd archivolt moltas archivolts moltas arctangent gwrthdangiad arctangents gwrthdangiad arctic air aer arctig arctic airs aer arctig arctic alpine arctig alpinaidd arctic alpines arctig alpinaidd arcuate bwaog are âr (unit of area) area adran (=section or part) area ardal (=district in general) area arwynebedd (=extent or measure of a surface) area maes (=scope or range of activity) area rhanbarth (=region or tract) area network rhwydwaith ardal area networks rhwydwaith ardal area of great environmental value ardal o werth amgylcheddol mawr area of scenic attraction ardal hynod o hardd area of scenic beauty ardal â golygfeydd prydferth area of the sector arwynebedd y sector area of triangle arwynebedd triongl area sample samplu ardal area school ysgol ardal area schools ysgol ardal areal differentiation gwahaniaethiad arwynebedd areal differentiations gwahaniaethiad arwynebedd areas adran (=section or part) areas ardal (=district in general) areas arwynebedd (=extent or measure of a surface) areas maes (=scope or range of activity) areas rhanbarth (=region or tract) arena arena arenaceous tywodlyd arenas arena arene aren arenes aren areolar tissue meinwe areolaidd areolar tissues meinwe areolaidd argenine argenin argenines argenin argillaceous cleiog arginine arginin arginine side-chain ochr-gadwyn arginin arginine side-chains ochr-gadwyn arginin arginines arginin argon argon (Ar) argons argon (Ar) argument arg (=amplitude) argument ymresymiad (=reasoning) arguments arg (=amplitude) arguments ymresymiad (=reasoning) arhat arhat arhythmic arhythmig aria aria arias aria arid cras arioso arioso aristocracy pendefigaeth aristocrat pendefig aristocrats pendefig arithmetic rhifyddeg arithmetic base rhifyddeg bôn arithmetic bases rhifyddeg bôn arithmetic mean cymedr rhifyddol arithmetic means cymedr rhifyddol arithmetic overflow gorlif rhifyddol arithmetic overflows gorlif rhifyddol arithmetic shift syfliad rhifyddol arithmetic shifts syfliad rhifyddol arithmetic-logic unit uned rifyddeg-resymeg (ALU) arithmetic-logic units uned rifyddeg-resymeg (ALU) arithmetical rhifyddol arithmetical progression dilyniant rhifyddol arithmetical progressions dilyniant rhifyddol arithmetician rhifyddwr arithmeticians rhifyddwr arithmetics rhifyddeg arithmogon rhifogon arithmogons rhifogon arm arfogi (with weapons) arm braich arm breichio (in dancing) arm jump naid braich arm jumping braich-neidio arm jumps naid braich arm ladder ysgol fraich arm ladders ysgol fraich arm palette palet braich arm palettes palet braich arm walking braich-gerdded armada armada armadas armada armament industry diwydiant arfau armaments arfau armature armatwr armatures armatwr armchair cadair freichiau armchairs cadair freichiau armed neutrality niwtraliaeth arfog armhole twll llawes armhole facing wynebyn twll llawes armhole facings wynebyn twll llawes armholes twll llawes armistice cadoediad armistices cadoediad armonica armonica armonicas armonica armour arfogaeth armour bright arfloyw armoured division adran arfog armoured divisions adran arfog armoured hose arfbib armoured hoses arfbib armoured ply pren haengaled armours arfogaeth armoury ystordy arfau armpit cesail armpits cesail arms bend breichiau'n blyg arms race ras arfau arms races ras arfau arms sideways breichiau ar led arms swinging swingio'r breichiau arms upwards breichiau i fyny army byddin army division adran o'r fyddin army divisions adran o'r fyddin army officer swyddog o'r fyddin army officers swyddog o'r fyddin aroma arogl aromas arogl aromatic aromatig (in chemistry) aromatic persawrus (in general) around o amgylch arpeggio arpeggio arpeggio 6/4 chord cord 6/4 arpeggio arpeggio 6/4 chords cord 6/4 arpeggio arraign cyhuddo arrange trefnu arrangement trefniad (=preparation) arrangement trefniant (in music, building etc) arrangements trefniad (=preparation) arrangements trefniant (in music, building etc) arranger trefnydd arrangers trefnydd arras brithlen array arae arrearage ôl-ddylediaeth arrearages ôl-ddylediaeth arrears ôl-ddyled arrears of rent ôl-ddyledion rhent arrest arestiad arrest arestio arrests arestiad arris ymyl fain arrival dyfodiad (of person) arrival and departure cyrraedd a gadael arrivals dyfodiad (of person) arrive cyrraedd arrow saeth arrow diagram diagram saeth arrow diagrams diagram saeth arrowhead pen saeth arrowhead tack tac pen saeth arrowhead tacks tac pen saeth arrowheads pen saeth arrowloop agen saethu arrowloops agen saethu arrowroot arorwt arrowroots arorwt arrows saeth arsenal arfdy (=weapons store) arsenal arsenal (in geography) arsenals arfdy (=weapons store) arsenals arsenal (in geography) arsenic arsenig (As) arsenics arsenig (As) arson llosgi bwriadol art celf (short form) art celfyddyd (in full) art board bwrdd arlunio art boards bwrdd arlunio art form ffurf gelf art forms ffurf gelf art materials defnyddiau celf art package pecyn arlunio art packages pecyn arlunio art therapist therapydd celf art therapists therapydd celf art vocabulary geirfa gelf artefact arteffact artefacts arteffact arterial rhydwelïol arterial line llinell rhydweli arterial lines llinell rhydweli arterial road ffordd brifwythiennol arterial roads ffordd brifwythiennol arteriole rhydwelïyn arterioles rhydwelïyn arteriosclerosis arteriosglerosis artery prif wythïen (of communication) artery rhydweli (in anatomy) artesian well ffynnon artesaidd artesian wells ffynnon artesaidd arthropod arthropod arthropods arthropod artic skua sgiwen y gogledd artic skuas sgiwen y gogledd artichoke artisiog artichokes artisiog article erthygl articles erthygl articles of association erthyglau cymdeithasiad articles of the treaty of Rome erthyglau cytundeb Rhufain articulate canu'n lân (of instrument) articulate croyw (of speech) articulate cymalog (=jointed) articulate ymgymalu (of bones) articulate ynganu (of voice) articulate performer perfformiwr cymalog (of gymnast) articulate performers perfformiwr cymalog (of gymnast) articulated cymalog (of skeleton, vehicle) articulation canu glân (of instrument) articulation ynganiad (of voice) articulations ynganiad (of voice) artificial artiffisial (=imitating the natural) artificial gosod (of teeth, limbs) artificial gwneud (of fabricated objects) artificial harmonics cyseiniau gwneud artificial insemination semenu artiffisial artificial intelligence deallusrwydd artiffisial artificial intelligences deallusrwydd artiffisial artificial kidney aren artiffisial artificial light golau artiffisial artificial lights golau artiffisial artificial limb aelod artiffisial artificial limbs aelod artiffisial artificial manure gwrtaith artiffisial artificial manures gwrtaith artiffisial artificial marble marmor artiffisial artificial marbles marmor artiffisial artificial respiration resbiradaeth artiffisial artificial respirations resbiradaeth artiffisial artificial seasoning sychu mewn odyn artificial silk sidan gwneud artificial silks sidan gwneud artificial stone carreg ffug artificial stones carreg ffug artificial stonework gwaith cerrig ffug artificial stoneworks gwaith cerrig ffug artificial ventilation awyru artiffisial artificial whetstone carreg hogi wneud artificial whetstones carreg hogi wneud artillery magnelaeth artillery range maes tanio (=firing range) artillery ranges maes tanio (=firing range) artilleryman magnelwr artillerymans magnelwr artisan crefftwr artisan painter arlunydd gwlad artisan painters arlunydd gwlad artisans crefftwr artist arlunydd (=painter) artist artist (=practitioner of any art) artist's canvas cynfas arlunio artist's materials defnyddiau arlunio artist's reconstruction adluniad arlunydd artist's reconstructions adluniad arlunydd artistic celfydd (of natural skill) artistic intention bwriad artistig artistic intentions bwriad artistig artists arlunydd (=painter) artists artist (=practitioner of any art) arts and entertainment celfyddydau ac adloniant arête crib arêtes crib as and when necessary yn ôl yr angen as described yn ôl y disgrifiad as high as cyfuwch â as indicated by fel y dangosir gan asbestos asbestos asbestos glove maneg asbestos asbestos gloves maneg asbestos asbestos mat mat asbestos asbestos mats mat asbestos asbestos pad pad asbestos asbestos pads pad asbestos ascend esgyn ascendancy goruchafiaeth ascender esgynnwr (in general) ascender esgynnydd (in typography) ascenders esgynnwr (in general) ascenders esgynnydd (in typography) ascending esgynnol ascending colon colon esgynnol ascending colons colon esgynnol ascending order trefn esgynnol ascending orders trefn esgynnol ascending powers pwerau esgynnol ascending scale graddfa esgyn ascending scales graddfa esgyn ascension esgyniad ascensions esgyniad ascent esgyniad ascents esgyniad ascetic asgetig asceticism asgetigiaeth asceticisms asgetigiaeth ascites asgites ascorbic acid asid asgorbig ascorbic acids asid asgorbig ascribe glory to God gogoneddu Duw ascription gogoneddiad (of glory) ascriptions gogoneddiad (of glory) ascus asgws asepsis asepsis aseptic aseptig aseptic technique techneg aseptig aseptic techniques techneg aseptig asexual anrhywiol asexual reproduction atgynhyrchu anrhywiol ash lludw ash llwyrlosgi ash content cynnwys lludw ash contents cynnwys lludw ash tray blwch llwch ash tree onnen ash trees onnen ashlar carreg nadd (of stone) ashlar gwaith cerrig nadd (of masonry work) ashlar finish gorffeniad cerrig nadd ashlar finishs gorffeniad cerrig nadd ashlaring estyll croglofft (of boarding) ashlars carreg nadd (of stone) ashlars gwaith cerrig nadd (of masonry work) ashrama / aśrama ashrama / aśrama asiento asiento askew ar letraws (in carpentry) asparagine asparagin asparagines asparagin asparagus asbaragws aspartase asbartas aspartases asbartas aspartic acid asid asbartig aspartic acids asid asbartig aspect agwedd aspects agwedd aspects of dance agweddau ar ddawnsiau aspersion taenelliad (liturgical) aspersions taenelliad (liturgical) asphalt asffalt asphalts asffalt asphyxia myctod asphyxias myctod asphyxiate mygu aspic asbig aspics asbig aspirate sugno aspiration dyhead (=desire) aspiration sugniad (=drawing of breath) aspirations dyhead (=desire) aspirations sugniad (=drawing of breath) assart asart assarts asart assassin asasin assassination llofruddiaeth assassinations llofruddiaeth assassins asasin assault ymosod assault ymosodiad assault and battery ymosod a churo assaults ymosodiad assay mark nod prawf assay marks nod prawf assayable solder sodr prawf arian assayable solders sodr prawf arian assemblage casgliad assemblages casgliad assemble cydosod (=fit together) assembler cydosodydd assemblers cydosodydd assembly cydosodiad (of parts) assembly cymanfa (religious) assembly cynulliad (political) assembly gwasanaeth (in school) assembly drawing lluniad cydosod (of object) assembly drawing lluniadu cydosod (of act) assembly drawings lluniad cydosod (of object) assembly language iaith gydosod assembly languages iaith gydosod assembly line llinell gydosod assembly lines llinell gydosod assembly of notables cymanfa'r hynodion assembly plant gwaith cydosod assembly plants gwaith cydosod assembly-line production cynhyrchu llinell gydosod assertive pendant assertiveness pendantrwydd assess asesu assessment asesiad assessment arrangements trefniadau asesu assessment centre canolfan asesu assessment centres canolfan asesu assessment criterion maen prawf asesu assessment criterions maen prawf asesu assessment grid grid asesu assessment grids grid asesu assessment guide canllaw asesu assessment guides canllaw asesu assessment mode modd asesu assessment modes modd asesu assessment objective amcan asesu assessment objectives amcan asesu assessment of mobility asesu symudedd assessment plan cynllun asesu assessment plans cynllun asesu assessment tool dull asesu assessment tools dull asesu assessments asesiad assessor aseswr assessors aseswr asset ased asset turnover trosiant asedau asset turnovers trosiant asedau assets ased assign neilltuo assign particle to cell neilltuo gronyn i gell assignment aseiniad (=task allotted to a person) assignment neilltuad (=statement that allocates a value to a variable) assignments aseiniad (=task allotted to a person) assignments neilltuad (=statement that allocates a value to a variable) assimilate cymathu assimilative cymathol assimilative hyphae hyffae cymathol assimilator cymathyn assimilators cymathyn assist cynorthwyo assistance cymorth assistance exercise ymarfer cynorthwyo assistance exercises ymarfer cynorthwyo assistances cymorth assistant cynorthwyydd assistants cynorthwyydd assistantship swydd cynorthwyydd assistantships swydd cynorthwyydd assisted area ardal gynorthwyedig assisted areas ardal gynorthwyedig assisted transport cludiant cynorthwyedig assisted transports cludiant cynorthwyedig assize brawdlys assize of arms aséis arfau assizes brawdlys associate member aelod cysylltiol associate members aelod cysylltiol associate nurse nyrs gysylltiol associate nurses nyrs gysylltiol associated cysylltiol associated norm norm cysylltiol associated norms norm cysylltiol association cydgymuned (ecological) association cymdeithas (=society) association centre canolfan gydgysylltiol association centres canolfan gydgysylltiol association of ideas cymdeithasiad syniadau associations cydgymuned (ecological) associations cymdeithas (=society) associative cysylltiadol associative law deddf gysylltiadol associative laws deddf gysylltiadol associative memory cof cysylltiadol associative play chwarae cysylltiadol associative store stôr gysylltiadol associative stores stôr gysylltiadol associator niwron cysylltiol (=connector neurone) associators niwron cysylltiol (=connector neurone) assort dosrannu assorted amrywiol assorted colours lliwiau amrywiol assortment amrywiaeth assortment of materials amrywiaeth defnyddiau assortments amrywiaeth assume tybio assume flesh ymgnawdoli assumption tybiaeth assumption of flesh ymgnawdoliad assumptions tybiaeth assurance sicrwydd (=certainty) assurance yswiriant (=insurance) assurances sicrwydd (=certainty) assurances yswiriant (=insurance) astable multivibrator amlddirgrynydd gwrthsefydlog astable multivibrators amlddirgrynydd gwrthsefydlog astatine astatin (At) astatines astatin (At) asterisk seren asterisks seren asteroid asteroid asteroids asteroid asthma asthma asthmas asthma astigmatism astigmatedd astigmatisms astigmatedd astragal astragal astragal moulding mowldin astragal astragal mouldings mowldin astragal astragals astragal astral serol astride traed ar led (position) astride jump naid ar led astride jumps naid ar led astride vault llofnaid ar led astride vaults llofnaid ar led astro-mythology sêr-fytholeg astrolabe astrolab astrolabes astrolab astrolatry sêr-addoliaeth astrological sêr-ddewiniol astrology sêr-ddewiniaeth astronomy seryddiaeth astrophysics astroffiseg asymmetric anghymesur asymmetric fold plyg anghymesur asymmetric folds plyg anghymesur asymmetrical anghymesurol asymmetry anghymesuredd asymptote asymptot asymptotes asymptot asymptotic asymptotig asynchronous anghydamseredig asystole ataliad y galon asystoles ataliad y galon at a discount ar ddisgownt at a premium ar bremiwm at an angle ar ongl at an angle of 35° ar ongl 35° at home gartref at par ar lawn werth at random ar hap at risk mewn perygl at the rate of yn ôl y gyfradd o at-symbol symbol am (@) at-symbols symbol am (@) atactic atactig ataxia atacsia ataxias atacsia atheism anffyddiaeth atheisms anffyddiaeth atheist anffyddiwr atheists anffyddiwr athematic athematig atherosclerosis atherosglerosis athlete athletwr athlete in training athletwr sy'n ymarfer athletes athletwr athletic athletaidd athletic activity gweithgaredd athletaidd athletic performance perfformiad athletaidd athletic performances perfformiad athletaidd athletics athletau athletics club clwb athletau athletics clubs clwb athletau atlas atlas atman atman (Sanskrit) atmans atman (Sanskrit) atmosphere atmosffer (of gases, pressure) atmosphere awyrgylch (=mood) atmospheres atmosffer (of gases, pressure) atmospheres awyrgylch (=mood) atmospheric atmosfferig atmospheric circulation cylchrediad atmosfferig atmospheric circulations cylchrediad atmosfferig atmospheric conditions amodau atmosfferig atmospheric pollution llygredd atmosfferig atmospheric pollutions llygredd atmosfferig atmospheric pressure gwasgedd atmosfferig atmospheric pressures gwasgedd atmosfferig atmospheric process proses atmosfferig atoll atol atolls atol atom atom atomic atomig atomic mass màs atomig atomic mass number rhif màs atomig atomic mass numbers rhif màs atomig atomic number rhif atomig atomic numbers rhif atomig atomic spacing gwahaniad atomig atomic spacings gwahaniad atomig atomic structure adeiledd yr atom atomic structures adeiledd yr atom atomicity atomedd atomization atomeiddiad atomizations atomeiddiad atomize atomeiddio atomizer atomadur atomizers atomadur atoms atom atonal digywair atonalist digyweirydd atonalists digyweirydd atonality digyweiredd atone gwneud iawn atonement iawn atonements iawn atrial atrïaidd atrio-ventricular node nod atrio-fentriglaidd (AVN) atrio-ventricular nodes nod atrio-fentriglaidd (AVN) atrium atriwm atriums atriwm atrocity erchyllter atrophy crebachiad atrophy crebachu attach arestio (=arrest) attach cydio (=fasten) attached ynghlwm attached dune twyn cysylltiedig attached dunes twyn cysylltiedig attachment atodyn (=accessory) attachment cydfan (=link) attachment site cyfanbwynt attachment sites cyfanbwynt attachments atodyn (=accessory) attachments cydfan (=link) attack ymosod attack ymosodiad attack on the blade ymosod ar y llafn attack with edge ymosod â'r min attacker ymosodwr attackers ymosodwr attacking position safle ymosodol attacking positions safle ymosodol attacking stroke ergyd ymosodol attacking strokes ergyd ymosodol attacks ymosodiad attain its bounds cyrraedd ei arffiniau attainder adendriad attainders adendriad attainment cyrhaeddiad attainment keys allweddi cyrhaeddiad attainment level lefel cyrhaeddiad attainment levels lefel cyrhaeddiad attainment of objectives cyflawni amcanion attainment target targed cyrhaeddiad attainment targets targed cyrhaeddiad attainment test prawf cyrhaeddiad attainment tests prawf cyrhaeddiad attainments cyrhaeddiad attaint adendro attend mynychu (school) attend rhoi sylw (=pay attention) attendance presenoldeb attendance allowance lwfans gweini attendance allowances lwfans gweini attendance centre canolfan fynychu attendance centres canolfan fynychu attendance record cofnod mynychu attendance records cofnod mynychu attendances presenoldeb attendant keys cyweiriau perthynol attention sylw attention span cyfnod canolbwyntio attention spans cyfnod canolbwyntio attentions sylw attentiveness gallu i dalu sylw attenuate gwanhau attenuation gwanhad attenuations gwanhad attenuator gwanhadur attenuators gwanhadur attitude agwedd (of mind) attitude osgo (of aeroplane, rocks) attitudes agwedd (of mind) attitudes osgo (of aeroplane, rocks) attojoule atojoule attojoules atojoule attorney twrnai attract atynnu attraction atyniad attractions atyniad attractive atyniadol attractive atynnol (of force) attractive deniadol (=charming) attractive force grym atynnol attractive forces grym atynnol attribute priodoledd attributes priodoledd attributes and variates priodoleddau ac amryweddau attribution priodoliad attributions priodoliad attrition athreuliad attritions athreuliad au gratin au gratin aubade aubade aubades aubade aubergine planhigyn wy aubergines planhigyn wy auction sale arwerthiant auction sales arwerthiant auctioneer arwerthwr auctioneers arwerthwr audibility clywadwyedd audible clywadwy audible range amrediad clywadwy audible ranges amrediad clywadwy audience cynulleidfa audience engagement ymrwymiad cynulleidfa audience engagements ymrwymiad cynulleidfa audience expectations disgwyliadau cynulleidfa audience reception derbyniad cynulleidfa audience receptions derbyniad cynulleidfa audience survey arolwg cynulleidfa audiences cynulleidfa audio clywedol audio book llyfr llafar audio books llyfr llafar audio frequency amledd awdio audio visual aids adnoddau clyweled audiogram awdiogram audiograms awdiogram audiolingual clywieithol audiology clinic clinig clyw audiology clinics clinig clyw audiometer awdiomedr audiometers awdiomedr audiometry awdiometreg audiotyping clywdeipio audit archwiliad audit archwilio audit agency asiantaeth archwilio audit moderator cymedrolwr archwilio audit moderators cymedrolwr archwilio audit trail trywydd archwilio audit trails trywydd archwilio auditor archwiliwr auditor of accounts archwiliwr cyfrifon auditors archwiliwr auditory clybodol auditory canal tiwb y glust auditory canals tiwb y glust auditory capsule cwpan y glust auditory capsules cwpan y glust auditory discrimination gwahaniaethu sŵn auditory meatus cyntedd y glust auditory memory cof clywedol auditory nerve nerf y clyw auditory nerves nerf y clyw auditory perception canfod sŵn auditory training hyfforddiant gwrando auditory trainings hyfforddiant gwrando audits archwiliad augend awgend augends awgend auger taradr auger bit ebill taradr auger bits ebill taradr augers taradr augment estyn (in music) augment ychwanegu (=add to) augmentation estyniad (in music) augmentation ychwanegiad (=addition) augmentations estyniad (in music) augmentations ychwanegiad (=addition) augmented estynedig (in music) augmented chord cord estynedig augmented chords cord estynedig augmented interval cyfwng estynedig augmented intervals cyfwng estynedig augmented seventh chord cord y seithfed estynedig augmented seventh chords cord y seithfed estynedig augmented sixth chord cord y chweched estynedig augmented sixth chords cord y chweched estynedig augmenter ychwanegydd augmenters ychwanegydd augury darogan aulos awlos aura awra aural clywedol aural aids cymhorthion clywedol aural perception canfyddiad clywedol aural perceptions canfyddiad clywedol aural stimulation cyffroad clywedol aural stimulations cyffroad clywedol aural stimulus ysgogiad clywadwy aural work sain glust aural works sain glust auras awra aureole lleugylch aureoles lleugylch auricle awrigl auricles awrigl auricular confession cyffes gudd auricular confessions cyffes gudd aurora awrora auroral awroraidd auroras awrora austenite awstenit austenites awstenit austerity llymder autarchy awtarchiaeth autecology awtecoleg auteur auteur auteurs auteur authentic dilys authentic mode modd sylfaenol authentic modes modd sylfaenol authenticate dilysu authenticating body corff dilysu authentication dilysu authenticity dilysrwydd authigenic awthigenig author awdur authoring awduro authoring package pecyn awduro authoring packages pecyn awduro authoritarian awdurdodaidd authoritarianism awdurdodaeth authoritarianisms awdurdodaeth authoritative awdurdodol authority awdurdod authorization awdurdodiad authorizations awdurdodiad authorize awdurdodi authorized awdurdodedig authorized version fersiwn awdurdodedig authorized versions fersiwn awdurdodedig authors awdur autism awtistiaeth autisms awtistiaeth autistic awtistig autistic child plentyn awtistig autistic childs plentyn awtistig auto-analyser dadansoddydd awtomatig auto-analysers dadansoddydd awtomatig autocatalysis awtocatalysis autochthonous brodorol autoclave ffwrn aerglos autoclaves ffwrn aerglos autocorrelation hunangydberthynas autocorrelations hunangydberthynas autocracy unbennaeth autocrat unben autocratic unbenaethol autocratic empire ymerodraeth unbenaethol autocratic empires ymerodraeth unbenaethol autocratic leader arweinydd unbenaethol autocratic leaders arweinydd unbenaethol autocratic rule rheolaeth unbenaethol autocratic rules rheolaeth unbenaethol autocrats unben autogenic hunangenedledig autograph llofnod autographs llofnod autoharp telyn ddodi autoharps telyn ddodi autoimmunity awtoimiwnedd automate awtomeiddio automated system system wedi'i hawtomeiddio automated systems system wedi'i hawtomeiddio automatic awtomatig automatic centre punch pwnsh canoli awtomatig automatic centre punches pwnsh canoli awtomatig automatic cut-off torbwynt awtomatig automatic cut-offs torbwynt awtomatig automatic feed porthiant awtomatig automatic feeds porthiant awtomatig automatic gearbox gerbocs awtomatig automatic gearboxes gerbocs awtomatig automatic machine peiriant awtomatig automatic machines peiriant awtomatig automatic reciprocation cilyddu awtomatig automatic stabilizer sefydlogydd awtomatig automatic stabilizers sefydlogydd awtomatig automatic thoughts meddyliau awtomatig automatic wrap-around amlap awtomatig automatic wrap-arounds amlap awtomatig automation awtomatiaeth automation equipment offer awtomatiaeth automations awtomatiaeth automatism awtomatedd automatisms awtomatedd automobile modur automobile component cydran modur automobile components cydran modur automobiles modur automorphic awtomorffig autonomic awtonomig autonomous ymreolaethol autonomous reader darllenydd annibynnol autonomous readers darllenydd annibynnol autonomous user defnyddiwr annibynnol autonomous users defnyddiwr annibynnol autonomy ymreolaeth autopolyploid awtopolyploid autopolyploids awtopolyploid autopolyploidy awtopolyploidi autopsy awtopsi autoregression ymatchweliad autoregressions ymatchweliad autoregressive ymatchwelaidd autorepeat awtoailadrodd autosomal awtosomaidd autosome awtosom autosomes awtosom autotroph hunanborthwr autotrophs hunanborthwr autumn equinox cyhydnos yr hydref autumn equinoxes cyhydnos yr hydref auxiliary ategol (in general) auxiliary tonnog (of musical note, chord) auxiliary 6/4 chord cord 6/4 tonnog auxiliary 6/4 chords cord 6/4 tonnog auxiliary circle cylch ategol auxiliary circle method dull cylch ategol auxiliary circle methods dull cylch ategol auxiliary circles cylch ategol auxiliary elevation golwg ategol auxiliary elevations golwg ategol auxiliary equation hafaliad ategol auxiliary equations hafaliad ategol auxiliary front elevation blaenolwg ategol auxiliary front elevations blaenolwg ategol auxiliary industry diwydiant cynorthwyol auxiliary plan uwcholwg ategol (of view) auxiliary plans uwcholwg ategol (of view) auxiliary projection tafluniad ategol auxiliary projections tafluniad ategol auxiliary teacher athrawes gynorthwyol (female) auxiliary teacher athro cynorthwyol (male) auxiliary teachers athrawes gynorthwyol (female) auxiliary teachers athro cynorthwyol (male) auxiliary view golwg ategol auxiliary views golwg ategol auxin awcsin auxins awcsin availability argaeledd available ar gael available relief tirwedd leol available reliefs tirwedd leol avalanche eirlithrad avalanches eirlithrad avant-garde avant-garde avant-gardes avant-garde avarice cybydd-dod avarices cybydd-dod avaricious cybyddlyd avatar / avatara avatar / avatara avatar / avataras avatar / avatara aventurine afentwrin aventurines afentwrin avenue rhodfa avenues rhodfa average canolig (=ordinary standard) average cyfartaledd average cyfartalog (worked out mathematically) average ability gallu canolig average attainment cyrhaeddiad ar gyfartaledd average attainments cyrhaeddiad ar gyfartaledd average capital cyfalaf cyfartalog average capitals cyfalaf cyfartalog average child plentyn cyffredin average childs plentyn cyffredin average cost cost gyfartalog average costs cost gyfartalog average income incwm cyfartalog average incomes incwm cyfartalog average price pris cyfartalog average prices pris cyfartalog average product cynnyrch cyfartalog average products cynnyrch cyfartalog average propensity to consume tuedd gyfartalog i ddefnyddio average propensity to save tuedd gyfartalog i gynilo average rainfall glawiad cyfartalog average rainfalls glawiad cyfartalog average rate cyfradd gyfartalog average rate of return cyfradd adenillion gyfartalog average rates cyfradd gyfartalog average rep time amser cyfartalog ail-wneud average rep times amser cyfartalog ail-wneud average revenue refeniw cyfartalog average revenues refeniw cyfartalog average scale factor ffactor graddfa gyfartalog average scale factors ffactor graddfa gyfartalog average stock stoc gyfartalog average stocks stoc gyfartalog average temperature tymheredd cyfartalog average temperatures tymheredd cyfartalog averages cyfartaledd aviation hedfan aviation industry diwydiant awyrennau avocado pear afocado avocado pears afocado avoid osgoi avoidance behaviour ymddygiad osgoi avoidance behaviours ymddygiad osgoi avoided cadence diweddeb annisgwyl avoided cadences diweddeb annisgwyl award dyfarniad (=judgement) award dyfarnu (by referee's decision) award gwobr (=prize) award gwobrwyo (=give prize) award damages dyfarnu iawndal awarding body corff dyfarnu awards dyfarniad (=judgement) awards gwobr (=prize) awareness ymwybyddiaeth awareness of space ymwybyddiaeth o ofod awareness of the dangers ymwybyddiaeth o beryglon awayswinger gwyriad allan awayswingers gwyriad allan awkward lletchwith awl mynawyd awn col axe bwyell axe head pen bwyell axe heads pen bwyell axes of reference echelinau lleoli axial echelinol axial plane plân echelinol axial planes plân echelinol axial skeleton sgerbwd echelinol axial skeletons sgerbwd echelinol axial trajectory taflwybr echelinol axil cesail axillary ceseilaidd axillary bud blaguryn ceseilaidd axillary buds blaguryn ceseilaidd axils cesail axiom gwireb axiomatic gwirebol axioms gwireb axis acsis (of bone in psychology) axis echelin (of line) axis of fold echelin plyg axis of symmetry echelin cymesuredd axle echel axle pulley echel bwli axles echel axon acson axon hillock bryncyn acson axon hillocks bryncyn acson axons acson ayah ayah ayahs ayah ayre ayre ayres ayre azeotrope aseotrop azeotropes aseotrop azimuth asimwth azimuthal projection tafluniad asimwthol azimuthal projections tafluniad asimwthol azimuths asimwth azo dye llifyn aso azo dyes llifyn aso azomethane asomethan azomethanes asomethan azonal anaeddfed azygotic asygotig babbitt metal metel babbitt babbitt metals metel babbitt babbling clebran baban (in development of children's speech) baby buggy coets baban baby lotion trwyth baban baby lotions trwyth baban baby massage tylino baban baby signing arwyddo baban baby-walker cerddwr baby-walkers cerddwr babygro dilledyn babygro babyhood babandod babyhoods babandod babysit gwarchod babysitter gwarchodwr babysitters gwarchodwr baccalaureate bagloriaeth baccalaureates bagloriaeth back cefn (in general) back olwr (of person) back rhoi cefnyn (in needlework) back arrow saeth yn ôl back arrows saeth yn ôl back bench mainc gefn back benches mainc gefn back board cefnfwrdd back boards cefnfwrdd back bodice bodis cefn back bodices bodis cefn back drop cefnlen back drops cefnlen back electromotive force ôl-rym electromotif back electromotive forces ôl-rym electromotif back facing wynebyn cefn back facings wynebyn cefn back fill ôl-lenwi back iron haearn cefn back irons haearn cefn back mutation ôl-fwtaniad back mutations ôl-fwtaniad back opening agoriad cefn back openings agoriad cefn back pay ôl-dâl back roller rholer ôl back rollers rholer ôl back row rheng ôl back rows rheng ôl back screen sgrin gefn back screens sgrin gefn back sight ôl-olwg back sights ôl-olwg back spring sbring cefn back springs sbring cefn back stick ffon wasgu (spinning) back sticks cefn ffyn (in hockey) back sticks ffon wasgu (spinning) back stitch pwyth ôl back stitches pwyth ôl back stop stop cefn back stops stop cefn back to back cefn wrth gefn (do-si-do) back to back cefngefn (of houses) back to back houses tai cefngefn back vault llofnaid gefn back vaults llofnaid gefn back view cefnlun back views cefnlun back wall mur cefn back wall out of court line ffin gefn back walls mur cefn back-heel ôl-sodli back-payment ôl-daliad back-payments ôl-daliad back-up cefnogaeth (=support) back-up wrth gefn back-up copy copi wrth gefn back-up support ategiad back-up supports ategiad back-ups cefnogaeth (=support) backbearing ôl-gyfeiriad backbearings ôl-gyfeiriad backboard bwrdd cefn backboards bwrdd cefn backbone asgwrn cefn backbones asgwrn cefn backcloth cefnlen backcloths cefnlen backcrawl nofio ar y cefn backcross ôl-groesiad backend processor ôl-brosesydd backend processors ôl-brosesydd backfire tanio'n ôl backflap hinge colfach llydan backflap hinges colfach llydan backflow ôl-lifiad backflows ôl-lifiad background cefndir background count cyfrif cefndir background count rate cyfradd cyfrif cefndir background count rates cyfradd cyfrif cefndir background counts cyfrif cefndir background enamel enamel cefndir background enamels enamel cefndir background heat gwres cefndir background heats gwres cefndir background music cerddoriaeth gefndir background musics cerddoriaeth gefndir background process proses gefndir background processing prosesu cefndir background punch pwnsh cefndir background punches pwnsh cefndir background study astudiaeth gefndir backgrounds cefndir backhand gwrthlaw backhand side ochr wrthlaw backhand sides ochr wrthlaw backhand stroke ergyd wrthlaw backhand strokes ergyd wrthlaw backhands gwrthlaw backing cefnogaeth (=support) backing cefnyn (material) backing cyfeiliant (=musical accompaniment) backing cymorth cefn (tambour door) backing gwrthwyro (of wind) backing board bwrdd cefnu backing boards bwrdd cefnu backing hammer morthwyl cefnu backing hammers morthwyl cefnu backing off cefnu backing sheet dalen gefnu backing sheets dalen gefnu backing store storfa gynorthwyol backing stores storfa gynorthwyol backings cefnogaeth (=support) backings cefnyn (material) backings cyfeiliant (=musical accompaniment) backings cymorth cefn (tambour door) backland cefnwlad (=hinterland) backlands cefnwlad (=hinterland) backlash adlach backlashs adlach backplate cefnblat backplates cefnblat backrest cefnell backrests cefnell backs cefn (in general) backs olwr (of person) backsaw llif gefn backsaws llif gefn backshore cefndraeth backshores cefndraeth backslope cefnlethr backslopes cefnlethr backspace olio backspin troelli o dan y bêl backstitch ôl-bwyth backstitches ôl-bwyth backstroke nofio ar y cefn backwall cefnfur backwalls cefnfur backward annatblygedig (=primitive) backward araf (=slow) backward yn ôl (of movement) backward area ardal arafgynnydd backward areas ardal arafgynnydd backward chaining cadwyno'n ôl backward child plentyn araf backward childs plentyn araf backward hanging hongian ôl backward point ôl-bwynt backward points ôl-bwynt backward reaction ôl-adwaith backward reactions ôl-adwaith backward roll rhôl yn ôl backward rolls rhôl yn ôl backward spring naid yn ôl backward springs naid yn ôl backward tilt gogwyddo'n ôl backwardness arafwch backwards wysg y cefn (=with the back foremost) backwash tynddwr backwashs tynddwr backwasting ôl-ddarfodiant backwastings ôl-ddarfodiant backwater merddwr backwaters merddwr backwoods gwylltgoed bacon cig moch bacon rind crofen bacon rinds crofen baconer mochyn bacwn baconers mochyn bacwn bacons cig moch bacterial bacteriol bactericidal bacterioleiddiol bacteriologist bacteriolegydd bacteriologists bacteriolegydd bacteriology bacterioleg bacteriophage bacterioffag bacteriophages bacterioffag bacteriostat bacteriostat bacteriostatic bacteriostatig bacteriostatic gwrthfacteria (finish) bacteriostats bacteriostat bacterium bacteriwm bacteriums bacteriwm bad practice arfer gwael bad practices arfer gwael badge bathodyn badge reader darllenydd bathodynnau badge readers darllenydd bathodynnau badges bathodyn badland garwdirol badlands garwdiroedd badminton badminton badmintons badminton bag bag bagatelle bagatelle bagatelles bagatelle bagpipe bacbib bagpipes bacbib bail caten (of cricket stumps) bail mechnïaeth bailey beili bails caten (of cricket stumps) bails mechnïaeth bain-marie bain-marie bain-maries bain-marie baize beias baizes beias bake pobi bake blind pobi'n wag baked apple afal pob baked apples afal pob baked beans ffa pob baked enamel enamel cras baked enamels enamel cras baker pobydd bakers pobydd bakestone maen bakestones maen baking powder powdr codi baking powders powdr codi baking tin tun pobi baking tins tun pobi balalaika balalaica balalaikas balalaica balance cadw cydbwysedd (=keep equilibrium) balance clorian (for weighing) balance cloriannu (=measure mass) balance cydbwysedd (=equilibrium) balance cydbwyso (=create equilibrium) balance gweddill (of money) balance mantoli (financial transactions) balance an equation cydbwyso hafaliad balance due balans dyledus balance dues balans dyledus balance flue simnai gytbwys balance flues simnai gytbwys balance line llinell gydbwysedd balance lines llinell gydbwysedd balance marks marciau cydbwysedd balance of community cydbwysedd cymuned balance of nature cydbwysedd natur balance of payments mantol daliadau balance of power cydbwysedd grym balance of trade mantol fasnach balance point pwynt cydbwysedd balance points pwynt cydbwysedd balance sheet mantolen balance sheets mantolen balance support ymgynnal cytbwys (in athletics) balance the accounts mantoli'r cyfrifon balance wheel olwyn cydbwysedd (of machine part) balance wheels olwyn cydbwysedd (of machine part) balanced cytbwys balanced bilingual cytbwys ddwyieithog balanced budget cyllideb fantoledig balanced budgets cyllideb fantoledig balanced diet deiet cytbwys balanced diets deiet cytbwys balanced economy economi cytbwys balanced flue ffliw gytbwys balanced flues ffliw gytbwys balanced forces grymoedd cytbwys balanced intake derbyn nifer cytbwys balanced judgement barn gytbwys balanced judgements barn gytbwys balanced shape ffurf gytbwys balanced shapes ffurf gytbwys balanced step gris cytbwys balanced steps gris cytbwys balanced swell pedal chwyddbedal cytbwys balanced swell pedals chwyddbedal cytbwys balancer veneer argaen cydbwyso balancer veneers argaen cydbwyso balances clorian (for weighing) balances cydbwysedd (=equilibrium) balances gweddill (of money) balancing cydbwysol balancing mechanism mecanwaith cydbwysol balancing mechanisms mecanwaith cydbwysol balancing skill sgìl cydbwyso balancing skills sgìl cydbwyso balcony balconi bale bwrn bale loader codwr byrnau bale loaders codwr byrnau baler byrnwr balers byrnwr bales bwrn ball pelen (single delivery of) ball pellen (of wool etc) ball pêl (to play with) ball and claw foot troed pelen a chrafanc ball and claw foots troed pelen a chrafanc ball and socket joint cymal pelen a chrau ball and socket joints cymal pelen a chrau ball boy bachgen y bêl ball castor castor pêl ball castors castor pêl ball catch clicied bêl ball catches clicied bêl ball clay clai pêl ball foot troed bêl ball foots troed bêl ball girl merch y bêl ball girls merch y bêl ball mill melin bêl ball mills melin bêl ball of the foot pelen y droed ball peen wyneb crwn ball peen hammer morthwyl wyneb crwn ball peen hammers morthwyl wyneb crwn ball peens wyneb crwn ball pointed bodkin botgin pengrwn ball pointed bodkins botgin pengrwn ball valve pêl-falf ball valves pêl-falf ball-bearing pelferyn ball-bearing runner rhedwr pelferyn ball-bearing runners rhedwr pelferyn ball-bearings pelferyn ball-head stake bonyn pengrwn ball-head stakes bonyn pengrwn ball-point needle nodwydd belenbwynt ball-point needles nodwydd belenbwynt ball-winner enillydd y bêl ball-winners enillydd y bêl ballad baled ballad opera opera faled ballad operas opera faled ballade ballade ballades ballade ballads baled ballet bale ballet chorus dawnsgor bale ballet dancer dawnsiwr bale ballet dancers dawnsiwr bale ballet mistress meistres y bale ballet music cerddoriaeth fale ballet musics cerddoriaeth fale ballets bale ballett balet (song) balletts balet (song) ballistic balistig ballistic missile taflegryn balistig ballistic missiles taflegryn balistig ballistics balisteg balloon balŵn balloon framing ffrâm falŵn balloon framings ffrâm falŵn balloons balŵn ballroom dance dawns neuadd ballroom dances dawns neuadd balls pelen (single delivery of) balls pellen (of wool etc) balls pêl (to play with) balsa balsa balsa cement sment balsa balsa cements sment balsa balsa wood pren balsa balsa woods pren balsa balsas balsa baluster balwster balusters balwster balustrade balwstrad balustrades balwstrad bamboo bambŵ bamboo cane cansen fambŵ bamboo canes cansen fambŵ banana banana bananas banana band band band corlannu (in computing) band nipper niper bandio band nippers niper bandio band spectrum sbectrwm band band spectrums sbectrwm band band stitch pwyth band band stitches pwyth band bandage rhwymo bandage rhwymyn bandages rhwymyn banded bandog banding bandin banding menu dewislen gorlannu banding menus dewislen gorlannu banding wheel olwyn fandio banding wheels olwyn fandio bandings bandin bands band bandsaw cylchlif bandsaws cylchlif banister canllaw grisiau banister brush brwsh canllaw grisiau banister brushs brwsh canllaw grisiau banisters canllaw grisiau banjo banjo bank banc (for money) bank clawdd (of earth) bank glan (of river) bank account cyfrif banc bank accounts cyfrif banc bank balance balans yn y banc bank balances balans yn y banc bank branch cangen banc bank branches cangen banc bank charges treuliau banc bank loan benthyciad banc bank loans benthyciad banc bank manager rheolwr banc bank managers rheolwr banc bank of drawers banc o ddroriau bank rate cyfradd banc bank rates cyfradd banc bank reserve cronfa banc bank reserves cronfa banc bank statement cyfriflen bank statements cyfriflen banker's order archeb banc banker's orders archeb banc bankful cyforlan bankfuls cyforlan banking bancio banking centre canolfan fancio banking centres canolfan fancio banking industry diwydiant bancio banking system cyfundrefn fancio banking systems cyfundrefn fancio banking up anhuddo (fire) banknotes arian papur bankrupt methdalwr (person) bankruptcy methdaliad bankruptcy court llys methdaliad bankruptcy courts llys methdaliad bankrupts methdalwr (person) banks banc (for money) banks clawdd (of earth) banks glan (of river) banner pennawd bras (headline) banner advert hysbyseb fras banner adverts hysbyseb fras banners pennawd bras (headline) bantam weight pwysau bantam baptism bedydd baptismal font bedyddfaen baptismal fonts bedyddfaen baptisms bedydd baptistry bedyddfa bar bar bar chart siart bar bar charts siart bar bar feed porthiant bar (mechanism) bar feeds porthiant bar (mechanism) bar graph graff bar bar graphs graff bar bar height uchder y bar bar heights uchder y bar bar magnet barfagnet bar magnets barfagnet bar tack tac cynnal bar tacks tac cynnal bar vocational course cwrs galwedigaethol y bar bar vocational courses cwrs galwedigaethol y bar barathea barathea baratheas barathea barb adfach barbola barbola barbola paste past barbola barbola pastes past barbola barbola varnish farnais barbola barbola varnishs farnais barbola barbola work gwaith barbola barbola works gwaith barbola barbolas barbola barbs adfach barbule adfachyn barbules adfachyn barcarolle barcaról barcarolles barcaról barchan barchan barchans barchan bare noeth bare wire gwifren noeth bare wires gwifren noeth barefaced mortise and tenon mortais a thyno unysgwyddog barefaced tenon tyno unysgwyddog barefaced tenons tyno unysgwyddog barefoot troednoeth barette barette barettes barette bargain bargen bargains bargen barge hyrddiad (in sport) barge hyrddio (in sport) barge ysgraff (=type of boat) barge-board astell dywydd barge-boards astell dywydd barges hyrddiad (in sport) barges ysgraff (=type of boat) baritone bariton baritone-clef allwedd y bariton baritone-clefs allwedd y bariton baritones bariton barium bariwm (Ba) bariums bariwm (Ba) bark rhisgl (of tree) barks rhisgl (of tree) barley haidd barley bread bara haidd barley breads bara haidd barley seeds hadau haidd barley water dŵr haidd barley waters dŵr haidd barline llinell bar (in music) barlines llinell bar (in music) barnacle cragen long barnacle gŵydd fôr barnacles cragen long barnacles gŵydd fôr barogram barogram barograms barogram barograph barograff barographs barograff barometer baromedr barometers baromedr barometric barometrig barometric gradient graddiant barometrig barometric gradients graddiant barometrig barometric tendency tueddiad barometrig baron barwn baronetcy barwnigaeth baronial barwnol barons barwn barony barwni baroque baróc baroque art celfyddyd faróc baroque arts celfyddyd faróc barrack block rhes o farics barrack blocks rhes o farics barrack building adeilad barics barrack buildings adeilad barics barracks barics barrage bared barrages bared barre barre barred door drws barrog barred doors drws barrog barrel baril (=cylindrical tube) barrel casgen (=cask) barrel bolt barilfollt barrel bolts barilfollt barrel cam cam baril barrel cams cam baril barrel ceiling nenfwd baril barrel ceilings nenfwd baril barrel organ organ gelwrn barrel organs organ gelwrn barrel printer argraffydd celwrn barrel printers argraffydd celwrn barrel spring sbring baril barrel springs sbring baril barrel vault pont faril barrel vaults pont faril barrels baril (=cylindrical tube) barrels casgen (=cask) barren diffrwyth barres barre barricade baricêd barricades baricêd barrier rhwystr (=obstacle) barrier beach bardraeth barrier beaches bardraeth barrier cream eli rhwystrol barrier creams eli rhwystrol barrier lake barlyn barrier lakes barlyn barrier method dull rhwystrol barrier methods dull rhwystrol barrier nursing nyrsio rhwystrol barrier reef barriff barrier reefs barriff barrier to entry rhwystr mynediad barrier to participation rhwystr sy'n atal pobl rhag cymryd rhan barriers rhwystr (=obstacle) barriers to communication rhwystrau i gyfathrebu barrister bargyfreithiwr barristers bargyfreithiwr barrow berfa (=wheelbarrow) barrow crug (=burial mound) barrows berfa (=wheelbarrow) barrows crug (=burial mound) barter ffeirio barysphere barysffer baryspheres barysffer barytite x-ray plaster plastr gwrthymbelydrol barytite x-ray plasters plastr gwrthymbelydrol baryton baryton barytons baryton bas-relief cerfwedd isel bas-reliefs cerfwedd isel basal gwaelodol basal body corffyn gwaelodol basal metabolism metabolaeth waelodol basal metabolisms metabolaeth waelodol basal sapping gwaelod-danseilio basalt basalt basalt ware crochenwaith basalt basalt wares crochenwaith basalt basalts basalt base bas (in chemistry, also in baseball) base bôn (in arithmetic, also of hedge, tree) base canolfan (=headquarters) base gwaelod (=bottom) base sail (of triangle) base sylfaen (of pyramid) base angle ongl sail base angles ongl sail base coat haen sail base coats haen sail base current cerrynt y sail base currents cerrynt y sail base level gwaelodfa base levels gwaelodfa base map map sylfaen base maps map sylfaen base moulding addurn gwaelod base mouldings addurn gwaelod base of scrum bôn y sgrym base period cyfnod sail base periods cyfnod sail base sequence dilyniant bas base sequences dilyniant bas base strength cryfder bas base strengths cryfder bas base-acid bas-asid base-acids bas-asid based on seiliedig ar based on geometrical shapes seiliedig ar ffurfiau geometrig based on texture seiliedig ar wead baseline llinell gefn (in tennis) baseline man cychwyn (=starting point) baseline data data gwaelodlin baselines llinell gefn (in tennis) baselines man cychwyn (=starting point) baseman baswr basemans baswr basement islawr basement membrane pilen waelodol basement membranes pilen waelodol basements islawr bases bas (in chemistry, also in baseball) bases bôn (in arithmetic, also of hedge, tree) bases canolfan (=headquarters) bases gwaelod (=bottom) bases sail (of triangle) bases sylfaen (of pyramid) basic Bessemer process proses fasig Bessemer basic action gweithrediad sylfaenol basic actions gweithrediad sylfaenol basic calculator cyfrifiannell sylfaenol basic calculators cyfrifiannell sylfaenol basic colour lliw sylfaenol basic colours lliw sylfaenol basic competence cymhwysedd sylfaenol basic competences cymhwysedd sylfaenol basic constituent cyfansoddyn sylfaenol basic construction adeiladwaith sylfaenol basic constructions adeiladwaith sylfaenol basic curriculum cwricwlwm sylfaenol basic curriculums cwricwlwm sylfaenol basic difference gwahaniaeth sylfaenol basic differences gwahaniaeth sylfaenol basic family teulu sylfaenol basic feasible solution datrysiad dichonadwy sylfaenol (bfs) basic feasible solutions datrysiad dichonadwy sylfaenol (bfs) basic form ffurf sylfaenol basic forms ffurf sylfaenol basic ground plan cynllun llawr sylfaenol basic ground plans cynllun llawr sylfaenol basic human need angen dynol sylfaenol basic human needs angen dynol sylfaenol basic industry diwydiant sylfaen basic lower body exercise ymarfer sylfaenol i'r corff isaf basic lower body exercises ymarfer sylfaenol i'r corff isaf basic material defnydd sylfaenol basic materials defnydd sylfaenol basic movement symudiad sylfaenol basic movements symudiad sylfaenol basic on-line system system ar-lein sylfaenol basic on-line systems system ar-lein sylfaenol basic open hearth process proses fasig tân agored basic pattern patrwm sylfaenol basic patterns patrwm sylfaenol basic rate cyfradd sylfaenol basic rates cyfradd sylfaenol basic recipe rysáit sylfaenol basic recipes rysáit sylfaenol basic rock craig fasig basic rocks craig fasig basic salary cyflog sylfaenol basic sight vocabulary geirfa weledol sylfaenol basic size maint sylfaenol basic sizes maint sylfaenol basic skill sgìl sylfaenol basic skills sgìl sylfaenol basic slag slag basig basic slags slag basig basic subject pwnc sylfaen basic subjects pwnc sylfaen basic surveying calculations cyfrifiadau syrfeo sylfaenol basic unit of charge uned sylfaenol gwefr basic upper body exercise ymarfer sylfaenol i'r corff uchaf basic upper body exercises ymarfer sylfaenol i'r corff uchaf basic vocabulary geirfa sylfaenol basic wage cyflog sylfaenol basic wages cyflog sylfaenol basicity basigedd basidiomycete basidiomycet basidiomycetes basidiomycet basidiospore basidiosbor basidiospores basidiosbor basidium basidiwm basidiums basidiwm basil basil basilica basilica basilicas basilica basils basil basin basn basin and range country tir basn a chadwyn basin of reception basn derbyn basins basn basipetal basipetalaidd basis sail basket basged basket frame ffrâm fasged basket frames ffrâm fasged basket handle dolen fasged basket handles dolen fasged basket maker gwneuthurwr basgedi basket makers gwneuthurwr basgedi basket weave gwead basged basket weaves gwead basged basket work basgedwaith basket works basgedwaith basketball pêl-fasged basketballs pêl-fasged basketry gwaith basged baskets basged basophil basoffil basophilic basoffilig basophils basoffil bass bas (of voice, instrument) bass draenogiad y môr (sea perch) bass boost atgyfnerthiad bas bass boosts atgyfnerthiad bas bass clarinet clarinét bas bass clarinets clarinét bas bass clarinettist bas-glarinetydd bass clarinettists bas-glarinetydd bass clef cleff bas bass clefs cleff bas bass cut toriad bas bass cuts toriad bas bass drum drwm bas bass drums drwm bas bass flute ffliwt fas bass flutes ffliwt fas bass horn corn bas bass horn player canwr corn bas bass horn players canwr corn bas bass horns corn bas bass trombonist bas-drombonydd bass trombonists bas-drombonydd bass trumpet utgorn bas bass trumpets utgorn bas bass viol feiol fas bass viols feiol fas bass-bar basfar (=piece of wood inside belly of violin) bass-bars basfar (=piece of wood inside belly of violin) basset horn corn baset basset horn clarinet clarinét tenor basset horn clarinets clarinét tenor basset horn player canwr corn baset basset horn players canwr corn baset basset horns corn baset basso ostinato basso ostinato bassoon basŵn bassoonist baswnydd bassoonists baswnydd bassoons basŵn bast bast bastard cut toriad bastard bastard cut file ffeil fastard bastard cut files ffeil fastard bastard cuts toriad bastard bastard feudalism ffug ffiwdaliaeth bastard feudalisms ffug ffiwdaliaeth bastard file ffeil fastard bastard files ffeil fastard baste brasbwytho (in needlework) baste brasteru (in cooking) bastide bastid bastides bastid basting stitch brasbwyth basting stitches brasbwyth basts bast bat bat bat batio batch swp batch baking pobiad batch bakings pobiad batch culture swp-feithrin batch culture fermenter eplesydd swp-feithrin batch culture fermenters eplesydd swp-feithrin batch processing swp-brosesu batch production swp-gynhyrchu batch reactor swp-adweithydd batch reactors swp-adweithydd batches swp bath baddon bath bathio bath building baddondy bath buildings baddondy bathe golchi bathe ymolch bathing costume gwisg nofio bathing costumes gwisg nofio batholith batholith batholithic batholithig batholiths batholith bathroom ystafell ymolch bathroom cabinet cabinet ystafell ymolch bathroom cabinets cabinet ystafell ymolch bathroom suite unedau ystafell ymolch bathrooms ystafell ymolch baths baddon bathyal zone cylchfa fathyal bathyal zones cylchfa fathyal bathygraph bathygraff bathygraphs bathygraff bathymetric bathymetrig bathymetry bathymetreg bathysphere bathysffer bathyspheres bathysffer batik batic batik dyeing llifo batic batik wax cwyr batic batik waxes cwyr batic batiks batic baton batwn batons batwn batsman batiwr batsmans batiwr battalion bataliwn battalions bataliwn battels bateloedd batten astell batten estyllu batten board astell stribed batten boards astell stribed battens astell batter cytew (for coating food) batter ôl-ogwydd (of slope of wall, hedge) batter rails rheiliau goleddf battered baby baban wedi'i guro battered wife gwraig gleisiog battered wifes gwraig gleisiog batters cytew (for coating food) batters ôl-ogwydd (of slope of wall, hedge) battery batri battery egg wy batri battery eggs wy batri battery hen iâr fatri battery hens iâr fatri batting crease cris batio batting creases cris batio batting glove maneg fatio batting gloves maneg fatio batting technique techneg batio batting techniques techneg batio battle brwydr battle axe cadfwyell battle axes cadfwyell battle cry rhyfelgri battle of Lepanto brwydr Lepanto battle of the gauges brwydr lled y cledrau battle order trefn y gad battle orders trefn y gad battlefield maes brwydr battlefields maes brwydr battlements bylchfuriau (=parapet) battlements murfylchau (=crenellations) battles brwydr battleship llong ryfel battleships llong ryfel batwing sleeve llawes ystlum batwing sleeves llawes ystlum baud baud baud rate cyfradd baud baud rates cyfradd baud bauds baud baulk trawst bras baulks trawst bras bauxite bocsit bauxite brick bricsen focsit bauxite bricks bricsen focsit bauxites bocsit bay bae bay bar bar bae bay bars bar bae bay window ffenestr grom bay windows ffenestr grom bay-head beach cildraeth bay-head beaches cildraeth bayleaf deilen llawryf bayleafs deilen llawryf bayonet bidog bayonets bidog bazaar basar bazaars basar beach traeth beach material defnyddiau traeth beaches traeth beachhead blaenlaniad beachheads blaenlaniad beachwear dillad traeth beacon ban (=high place) beacon goleufa (=warning or guiding light) beacon tŵr (=tower) beacons ban (=high place) beacons goleufa (=warning or guiding light) beacons tŵr (=tower) bead glain bead gleinio bead and butt panel panel glain ac ymyl bead and butt panels panel glain ac ymyl bead and reel glain a rîl bead moulding mowldin glain bead mouldings mowldin glain bead trimming addurn glain bead trimmings addurn glain beaded esker esgair gnapiog beaded eskers esgair gnapiog beadhouse betws beadhouses betws beading gleinwaith beading needle nodwydd gleinwaith beading needles nodwydd gleinwaith beadings gleinwaith beadle bedel beadles bedel beads glain beadsman paderwr beadsmans paderwr beadwork gleinwaith beadworks gleinwaith beak pig beaker bicer beaker folk bicerwyr beakers bicer beaks pig beam paladr (of light) beam trawst (of wood, metal etc) beam balance clorian drawst beam balances clorian drawst beam engine peiriant trawst beam engines peiriant trawst beam in situ trawst sefydlog beam saddle cyfrwy trawst beam saddles cyfrwy trawst beams paladr (of light) beams trawst (of wood, metal etc) bean ffeuen bean bag bag ffa (for throwing) bean bag sach eistedd (for sitting on) bean bags bag ffa (for throwing) bean bags sach eistedd (for sitting on) bean sprouts egin ffa beans ffeuen beard barf beards barf bearer cynhalydd (drawer) bearer rail rheilen gynnal bearer rails rheilen gynnal bearers cynhalydd (drawer) bearing beryn (mechanical) bearing line cyfeirlin bearing lines cyfeirlin bearing rest gorffwysfan beryn bearing rests gorffwysfan beryn bearing shell cragen feryn bearing shells cragen feryn bearings beryn (mechanical) bearings cyfeiriad (=position, orientation) beast of burden anifail pwn beat curiad beat curo beat frequency amledd curiad beat frequency oscillator osgiliadur amledd curiad beat frequency oscillators osgiliadur amledd curiad beaten metalwork gwaith morthwyl beaten metalworks gwaith morthwyl beater curwr beaters curwr beating tacio (in sailing) beating time curo amser beats curiad beaumontage beaumontage beaumontages beaumontage beauty harddwch bechamel sauce saws bechamel bechamel sauces saws bechamel bed gwely (in general) bed gwelyo bed haen (=stratum) bed chamber siambr wely bed chambers siambr wely bed jacket siaced wely bed jackets siaced wely bed linen dillad gwely bed-wetting gwlychu gwely bedding dillad gwely (=bedclothes) bedding haenau (of strata) bedding haenol (of strata) bedding plane plân haenu bedding planes plân haenu bedpan padell wely bedpans padell wely bedrest gorffwys gwely bedrests gorffwys gwely bedridden gorweddog bedrock creigwely bedrocks creigwely bedroom ystafell wely bedrooms ystafell wely bedsitter fflat un ystafell bedsitters fflat un ystafell bedsock hosan wely bedsocks hosan wely bedsore briw gorwedd bedsores briw gorwedd bedspread cwrlid bedspreads cwrlid bedways cledrau (lathe) beech ffawydden beech mallet gordd ffawydd beech mallets gordd ffawydd beech tree ffawydden beech trees ffawydden beech wood pren ffawydd beech wood mallet gordd bren ffawydd beech wood mallets gordd bren ffawydd beech woods pren ffawydd beeches ffawydden beef cig eidion beef extract rhin cig eidion beef extracts rhin cig eidion beef olives olifau cig eidion beef tea te cig eidion beef teas te cig eidion beefburger eidionyn beefburgers eidionyn beefs cig eidion beer cwrw beers cwrw beeswax cwyr gwenyn beeswax polish llathrydd cwyr gwenyn beeswax polishs llathrydd cwyr gwenyn beeswaxes cwyr gwenyn beet sugar siwgr betys beet sugars siwgr betys beetle chwilen beetles chwilen beetroot betysen beetroots betysen before o flaen before tax cyn tynnu treth beggar cardotyn beggars cardotyn begin dechrau beginner dechreuwr beginners dechreuwr beginning dechrau beginnings dechrau behaviour ymddygiad behaviour difficulties anawsterau ymddygiad behaviour objectives amcanion ymddygiad behaviour policy polisi ymddygiad behaviour therapy therapi ymddygiad behavioural ymddygiadol behavioural evidence tystiolaeth ymddygiadol behavioural evidences tystiolaeth ymddygiadol behavioural problems problemau ymddygiad behavioural psychology seicoleg ymddygiad behavioural theory damcaniaeth ymddygiad behavioural unit uned ymddygiad behavioural units uned ymddygiad behaviourism ymddygiadaeth behaviourisms ymddygiadaeth behaviours ymddygiad beheaded stream ffrwd bengoll beheaded streams ffrwd bengoll being bod being cared for o dan ofal beings bod bel bel belay belai belfry clochdy belief credo belief system system cred belief systems system cred beliefs credo believe credu believer's baptism bedydd cred believer's baptisms bedydd cred bell cloch bell chuck crafanc gloch bell chucks crafanc gloch bell harp telyn glychsain bell harps telyn glychsain bell metal metel cloch bell metals metel cloch bell pit pwll cloch bell pits pwll cloch bell punch pwnsh cloch bell punches pwnsh cloch bell sleeve llawes gloch bell sleeves llawes gloch bell tower clochdy bell towers clochdy bell-jar clochen bell-jars clochen bellows megin bells cloch belly bol (of instrument) belly pork porc bol belly porks porc bol belly-dancer boladdawnswraig belly-dancers boladdawnswraig below the belt dan y belt belt ardal (=area) belt belt (on machine) belt gwregys (for wearing, also of encircling land) belt llain (=strip of land) belt rhanbarth (=region) belt carrier dolen belt belt carriers dolen belt belt coupling cyplydd belt belt couplings cyplydd belt belt dressing dresin belt belt dressings dresin belt belt pouch pwrs gwregys belt pouches pwrs gwregys belt pulley pwli belt belt rivet rhybed belt belt rivets rhybed belt belt sander sandiwr belt belt sanders sandiwr belt belt screw sgriw belt belt screws sgriw belt belt shifter symudydd belt belt shifters symudydd belt belt stretcher estynnwr belt belt stretchers estynnwr belt belt tightener tynhawr belt belt tighteners tynhawr belt belts ardal (=area) belts belt (on machine) belts gwregys (for wearing, also of encircling land) belts llain (=strip of land) belts rhanbarth (=region) bench mainc bench drill dril mainc bench drilling machine peiriant drilio mainc bench drilling machines peiriant drilio mainc bench drills dril mainc bench end ystlys mainc bench end vice feis ben mainc bench end vices feis ben mainc bench ends ystlys mainc bench grinder llifanydd mainc bench grinders llifanydd mainc bench holdfast dalbren mainc bench holdfasts dalbren mainc bench hook bachyn mainc bench hooks bachyn mainc bench jump naid fainc bench jumps naid fainc bench plane plaen mainc bench planes plaen mainc bench rib asen y fainc bench ribs asen y fainc bench shears gwellaif mainc bench stop rhagod bench stops rhagod bench tools offer mainc bench vice feis fainc bench vices feis fainc bench well cafn mainc bench wells cafn mainc bench work gwaith mainc bench works gwaith mainc bencher meinciwr benchers meinciwr benches mainc benchmark meincnod benchmarking meincnodi benchmarks meincnod bend plyg bend plygu bend backwards plygu'n ôl bend down plygu i lawr bend line llinell blygu bend lines llinell blygu bendability plygiannedd bending plygu (angular / radius) bending bar bar plygu bending bars bar plygu bending equipment offer plygu bending jig jig plygu bending jigs jig plygu bending moment moment plygu bending moments moment plygu bends plyg benediction bendith benedictions bendith benefice bywoliaeth beneficed mewn bywoliaeth benefices bywoliaeth benefit braint (legal) benefit budd (=advantage) benefit budd-dal (=insurance or social security payment) benefit of clergy braint clerigwyr benefits braint (legal) benefits budd (=advantage) benefits budd-dal (=insurance or social security payment) benevolence benthyciad gorfodol (=forced loan) benevolences benthyciad gorfodol (=forced loan) benevolent cyfeillgar benevolent despot unben goleuedig benevolent despotism unbennaeth oleuedig benevolent despotisms unbennaeth oleuedig benevolent despots unben goleuedig benevolent neutrality niwtraliaeth gyfeillgar bent backward hanging hongian ôl plyg bent bodkin botgin cam bent bodkins botgin cam bent bond bond cam bent bonds bond cam bent flat bodkin botgin fflat cam bent flat bodkins botgin fflat cam bent frame ffrâm blyg bent frames ffrâm blyg bent gouge gaing gau blyg bent gouges gaing gau blyg bent grass maeswellt (=agrostis) bent locking plate plât cloi plyg bent locking plates plât cloi plyg bent nose pliers gefelen drwyn cam bent wire gwifren blyg (decorative process) bent wires gwifren blyg (decorative process) bent-tail carrier cariwr cynffon plyg bent-tail carriers cariwr cynffon plyg benthic benthig benthos benthos bentwood chair cadair bren plyg bentwood chairs cadair bren plyg bentwood furniture dodrefn pren plyg benzene bensen benzenes bensen benzoic acid asid bensöig benzoic acids asid bensöig bequeath cymynroddi bequest cymynrodd bequests cymynrodd berceuse berceuse berceuses berceuse bereavement profedigaeth bereavements profedigaeth beret beret berets beret bergamask bergamasca bergamasks bergamasca bergwind bergwynt bergwinds bergwynt berkelium berceliwm (Bk) berkeliums berceliwm (Bk) berry aeronen berth docfa berth docio berths docfa beryllium beryliwm (Be) berylliums beryliwm (Be) best before ar ei orau cyn best face wyneb gorau best faces wyneb gorau best fit ffit orau best fits ffit orau best position safle gorau best positions safle gorau best time amser gorau best times amser gorau beta particle gronyn beta beta particles gronyn beta betaine betain betaines betain betrothal dyweddïad betrothals dyweddïad between centres rhwng canolau (on a lathe) between needle nodwydden between needles nodwydden bevel befel bevel befelu bevel chisel cŷn befel bevel chisels cŷn befel bevel gears gerau befel bevel panel panel befel bevel panels panel befel bevel wheels olwynion befel bevelled edge ymyl befel bevelled edges ymyl befel bevelled panel panel befel bevelled panels panel befel bevels befel beverage diod beverages diod bezel gwefl bezelled gweflog bezels gwefl bhakti bhakti bhaktis bhakti bias bias (in physics and of fabric) bias biasu (in physics and of fabric) bias gogwydd (=inclination) bias tuedd (in statistics) bias binding rhwymyn bias bias bindings rhwymyn bias bias extension estyniad bias bias extensions estyniad bias bias facing wynebyn bias bias facings wynebyn bias biased tueddol biased estimate amcangyfrif â thuedd (in statistics) biased estimates amcangyfrif â thuedd (in statistics) bib bib bibliography llyfryddiaeth bicarbonate of soda soda pobi bicellular deugellog biceps cyhyryn deuben bicimal deuol bicimal deuolyn bicimal point pwynt deuol bicimal points pwynt deuol bicimals deuolyn bick iron bonyn pig bick irons bonyn pig bicollateral bundle sypyn deugyfraidd bicollateral bundles sypyn deugyfraidd biconcave deugeugrwm biconcave lens lens deugeugrwm biconvex deuamgrwm bicultural deuddiwylliannol bicuspid valve falf ddwylen bicuspid valves falf ddwylen bid-rent curve cromlin rhent cynnig bid-rent curves cromlin rhent cynnig bidirectional bus bws deugyfeiriadol biennial eilflwydd biennial eilflwyddiad biennial flower blodyn eilflwydd biennial flowers blodyn eilflwydd biennials eilflwyddiad bifilar suspension croglin ddwbl bifilar suspensions croglin ddwbl bifocal deuffocal bifurcated deufforchiog bifurcated rivet rhybed deufforchog bifurcated rivets rhybed deufforchog bifurcation deufforchiad bifurcation ratio cymhareb ddeufforchio bifurcations deufforchiad big end bearing beryn y pen mawr big end bearings beryn y pen mawr bigger than mwy na bight geneufor bights geneufor bijective mapping mapio deusaethol bikini bicini bikinis bicini bilateral dwyochrol bilateral cleavage ymraniad cyfartal bilateral cleavages ymraniad cyfartal bilateral monopoly monopoli dwyffordd bilateral symmetry cymesuredd dwyochrol bilaterally symmetrical dwyochrol gymesur bilberries llus bile bustl bile acids asidau bustlog bile duct dwythell y bustl bile ducts dwythell y bustl bile pigment pigment y bustl bile pigments pigment y bustl bile salts halwynau'r bustl biles bustl bilge keel cilbren sadio bilge keels cilbren sadio bilinear deulinol bilingual dwyieithog bilingual person dwyieithog bilingual education addysg ddwyieithog bilingual educations addysg ddwyieithog bilingualism dwyieithrwydd bilingualisms dwyieithrwydd bilinguals person dwyieithog bilious bustlog bilirubin bilirwbin bilirubins bilirwbin biliverdin biliferdin biliverdins biliferdin bill bil (=statement of charges) bill mesur seneddol (before parliament) bill of exchange bil cyfnewid bill of indictment bil ditio bill of loading bil llwytho bill of quantities bil priodweddau bill of sale bil gwerthiant billet lletya milwyr billet moulding mowldin bilet billet mouldings mowldin bilet billhook bilwg billhooks bilwg billion biliwn billions biliwn bills bil (=statement of charges) bills mesur seneddol (before parliament) bimetallic deufetel bimetallic strip stribed deufetel bimetallic strips stribed deufetel bimodal deufodd bimolecular deufoleciwlaidd bin bin binary deuaidd binary arithmetic rhifyddeg ddeuaidd binary arithmetic operation gweithrediad rhifyddeg ddeuaidd binary arithmetic operations gweithrediad rhifyddeg ddeuaidd binary arithmetics rhifyddeg ddeuaidd binary bit did deuaidd binary bits did deuaidd binary cell cell ddeuaidd binary cells cell ddeuaidd binary code cod deuaidd binary coded character nod cod deuaidd binary coded characters nod cod deuaidd binary coded decimal degolyn cod deuaidd binary coded decimal notation nodiant degolion cod deuaidd binary coded decimal notations nodiant degolion cod deuaidd binary coded decimals degolyn cod deuaidd binary coded digit digid cod deuaidd binary coded digits digid cod deuaidd binary codes cod deuaidd binary counter rhifydd deuaidd binary counters rhifydd deuaidd binary digit digid deuaidd binary digits digid deuaidd binary dump dymp deuaidd binary dump dympio deuaidd binary dumps dymp deuaidd binary fission ymholltiad deuaidd binary fissions ymholltiad deuaidd binary form ffurf ddeuaidd binary forms ffurf ddeuaidd binary image delwedd ddeuaidd binary images delwedd ddeuaidd binary notation nodiant deuaidd binary notations nodiant deuaidd binary number rhif deuaidd binary numbers rhif deuaidd binary numeral rhifolyn deuaidd binary numerals rhifolyn deuaidd binary operation gweithrediad deuaidd binary operations gweithrediad deuaidd binary opposition cyferbynnu deuaidd binary point pwynt deuaidd binary points pwynt deuaidd binary search chwiliad deuaidd binary searches chwiliad deuaidd binary star seren ddwbl binary stars seren ddwbl binary time amser dwyran binary times amser dwyran binary to decimal conversion trawsnewidiad deuaidd i ddegol binary tree coeden ddeuaidd binary trees coeden ddeuaidd binary variable newidyn deuaidd binary variables newidyn deuaidd binaural deuglust bind clymu (with rope etc in physics) bind rhwymo (books etc with bandages etc) binder rhwymell (machine attachments) binder rhwymwr (of person) binders rhwymell (machine attachments) binders rhwymwr (of person) binding rhwymiad (of book) binding rhwymyn (=something that binds) binding energy egni clymu binding margin ymyl rhwymo binding margins ymyl rhwymo binding medium cyfrwng rhwymo binding mediums cyfrwng rhwymo binding precedent cynsail rwymol binding precedents cynsail rwymol binding wire gwifren rwymo binding wires gwifren rwymo bindings rhwymiad (of book) bindings rhwymyn (=something that binds) binocular deulygad binocular vision golwg deulygad binocular visions golwg deulygad binomial binomaidd binomial binomial binomial distribution dosraniad binomaidd binomial distributions dosraniad binomaidd binomial nomenclature dull enwi binomaidd binomial nomenclatures dull enwi binomaidd binomial theorem theorem binomial binomial theorems theorem binomial binomials binomial bioaccumulation biogynyddiad bioaccumulations biogynyddiad biochemical biocemegyn biochemicals biocemegyn biochemist biocemegydd biochemistry biocemeg biochemists biocemegydd biochore bïocor biochores bïocor bioclimatology biohinsoddeg biodegradable bioddiraddadwy biogenesis biogenesis biogeochemical bioddaeargemegol biogeography bioddaearyddiaeth biological biolegol biological control rheoli biolegol biological detergent glanedydd biolegol biological detergents glanedydd biolegol biological half life hanner oes biolegol biological half lifes hanner oes biolegol biological value gwerth biolegol biological values gwerth biolegol biology bioleg (of winter) bioluminescence bioymoleuedd bioluminescences bioymoleuedd biomass biomas biome bïom biomechanics biomecaneg biomes bïom biosensor biosynhwyrydd biosensors biosynhwyrydd biosome biosom biosomes biosom biosphere biosffer biospheres biosffer biosynthesize biosynthesu biotechnology biotechnoleg biotic biotig biotransformation biotrawsffurfiant biotransformations biotrawsffurfiant bipartite deurannol bipolar deubegwn birch bedwen birch plywood pren haenog bedw birch plywoods pren haenog bedw birches bedwen bird's eye llygad aderyn (maple) bird's eye view golygfa trem aderyn bird's eye views golygfa trem aderyn bird's foot delta delta crafanc bird's foot deltas delta crafanc birdsmouth ceg aderyn birdsmouths ceg aderyn birth genedigaeth birth and death statistics ystadegau geni a marw birth certificate tystysgrif geni birth certificates tystysgrif geni birth control rheoli cenhedlu birth defect nam geni birth defects nam geni birth rate cyfradd genedigaethau birth rates cyfradd genedigaethau birth weight pwysau geni birthmark man geni birthmarks man geni birthright genedigaeth-fraint birthrights genedigaeth-fraint births genedigaeth biscuit bisged biscuit firing tanio bisged biscuits bisged bisect dwyrannu (=divide in two) bisect haneru (=halve) bisector hanerydd bisectors hanerydd bisexual deurywiol bishop esgob bishop sleeve llawes esgob bishop sleeves llawes esgob bishop's commissary comisari'r esgob bishop's palace palas esgob bishop's palaces palas esgob bishopland tir esgob bishoplands tir esgob bishopric esgobaeth bishoprics esgobaeth bishops esgob bismuth bismwth (Bi) bismuths bismwth (Bi) bistable deusad bistables deusad bit crwcddarn (in music) bit did (in computing) bit ebill (of drill etc) bit haearn sodro (for soldering) bit density dwysedd didol bit location lleoliad did bit locations lleoliad did bit pattern patrwm didol bit patterns patrwm didol bit position safle didol bit positions safle didol bit rate cyfradd ddidol bit rates cyfradd ddidol bit string llinyn didau bit strings llinyn didau bite cnoad (describing texture) bite tamaid (=small piece) bites cnoad (describing texture) bites tamaid (=small piece) bitmap didfap bitmaps didfap bitonal deugywair bitonality deugyweiredd bits per second didau yr eiliad bitter chwerw bitter lake llyn chwerw bitter lakes llyn chwerw bitterness chwerwedd bitumen bitwmen bitumens bitwmen bituminous coal glo rhwym bituminous coals glo rhwym bituminous paint paent bitwmen bituminous paints paent bitwmen bitwise modd did bitwises modd did bivalent deufalent bivalve dwygragennog black du (enamelling colour) black bar bar du black bars bar du black beans ffa du black body radiator pelydrydd cyflawn black body radiators pelydrydd cyflawn black bonding bondin du black bondings bondin du black check banding bandin siec du black check bandings bandin siec du black economy economi du black frost rhew du black frosts rhew du black heat gwres du black heats gwres du black ice iâ du black ices iâ du black market marchnad ddu black markets marchnad ddu black mild steel dur meddal du (B.M.S.) black mild steels dur meddal du (B.M.S.) black pudding pwdin gwaed black puddings pwdin gwaed black rubric cyfeireb ddu black rubrics cyfeireb ddu black-eyed beans ffa llygatddu blackberries mwyar blackboard bwrdd du blackboards bwrdd du blackcurrants cyrens duon blackheart cast iron haearn bwrw hydrin blackheart cast irons haearn bwrw hydrin blacking duo (decorative process) blackjack blacjac (blende) blackjacks blacjac (blende) blackleg blacleg blacklegs blacleg blacks du (enamelling colour) blacks and whites duon a gwynion blackshirts crysau duon blacksmith gof blacksmith's forge gefail gof blacksmith's forges gefail gof blacksmith's hearth tân gof blacksmith's hearths tân gof blacksmiths gof bladder chwysigen (of plants) bladder pledren (of animals) bladders chwysigen (of plants) bladders pledren (of animals) blade llafn (of knife, bat) blade of grass gwelltyn blades llafn (of knife, bat) blanch blansio blank bwlch (=blank space) blank gwag blank cheque siec wag blank cheques siec wag blank disk disg gwag blank disks disg gwag blanket blanced blanket bath ymolch yn y gwely blanket bog gorgors blanket bogs gorgors blanket stitch pwyth blanced blanket stitches pwyth blanced blankets blanced blanks bwlch (=blank space) blasphemy cabledd blast chwyth blast chwythellu (=blow air on) blast chwythiad (=strong gust) blast ffrwydrad (=explosion) blast furnace ffwrnais chwyth blast furnaces ffwrnais chwyth blast hole chwythdwll blast holes chwythdwll blastocoel blastocoel blastocoels blastocoel blastocyte blastocyt blastocytes blastocyt blastoderm blastoderm blastoderms blastoderm blastomere blastomer blastomeres blastomer blastophore blastoffor blastophores blastoffor blasts chwythiad (=strong gust) blasts ffrwydrad (=explosion) blastula blastwla blastulas blastwla bleach cannu bleach cannydd bleach solution hydoddiant cannu bleach solutions hydoddiant cannu bleached can bleached area rhan wedi'i channu bleached areas rhan wedi'i channu bleached calico calico can bleached cane gwialen gan bleached canes gwialen gan bleached white calico calico gwyn can bleaches cannydd bleaching agent cannydd bleaching agents cannydd bleaching powder powdr cannu bleaching powders powdr cannu bleeding gwaedu bleeding of dye llifyn yn rhedeg bleep test prawf blip bleep tests prawf blip bleeper blipiwr bleepers blipiwr blend asio (voices) blend cymhlitho (in biology) blend cymysgedd (in cooking) blend cymysgu (in cooking) blende blend (zinc) blended fabric ffabrig cymysg blended fabrics ffabrig cymysg blended fibre ffibr cymysg blended fibres ffibr cymysg blended inheritance etifeddiaeth gymhlith blended inheritances etifeddiaeth gymhlith blended material defnydd cymysg blended materials defnydd cymysg blended-hair brush brwsh blew cymysg blended-hair brushs brwsh blew cymysg blender cymysgydd blenders cymysgydd blendes blend (zinc) blends cymysgedd (in cooking) blessed sacrament cymun bendigaid blessed sacraments cymun bendigaid blessing bendith blessings bendith blight malltod (of planning) blights malltod (of planning) blind cysgodlen (on window) blind dall (=unable to see) blind alley llwybr diffrwyth (figurative sense) blind child plentyn dall blind childs plentyn dall blind hem hem gudd blind hems hem gudd blind hole twll dall blind holes twll dall blind mortise mortais dall blind mortises mortais dall blind nailing hoelio dall blind pupil disgybl dall blind pupils disgybl dall blind side ochr dywyll blind side wing forward blaenasgell dywyll blind side wing forwards blaenasgell dywyll blind sides ochr dywyll blind spot dallbwynt blind spots dallbwynt blind-ending pengaead blindness dallineb blinds cysgodlen (on window) blister pothell blister copper copr pothell blister coppers copr pothell blister steel dur pothell blister steels dur pothell blistering pothellu blisters pothell blizzard storm eira blizzards storm eira bloating ymchwyddo blob smotyn blobs smotyn block bloc block blocio (=to use a block) block rhwystro (=obstruct) block capital letter priflythyren block capital letters priflythyren block chart siart bloc block charts siart bloc block clamp clamp bloc block clamps clamp bloc block colour lliw bloc block colours lliw bloc block cutter blocdorrwr block cutters blocdorrwr block cutting tool erfyn ysgythru block cutting tools erfyn ysgythru block design test prawf trefnu patrymau block design tests prawf trefnu patrymau block diagram diagram bloc block diagrams diagram bloc block field cludair (felsenmeer) block fields cludair (felsenmeer) block form ffurf bloc block forms ffurf bloc block graph graff bloc block graphs graff bloc block lava bloc lafa block lavas bloc lafa block length hyd bloc block lengths hyd bloc block lettering prif lythrennu block letters prif lythrennau block mountain blocfynydd block mountains blocfynydd block move symudiad bloc block moves symudiad bloc block paragraph paragraff ochr block paragraphs paragraff ochr block pattern patrwm bloc block patterns patrwm bloc block placement lleoliad mewn bloc block placements lleoliad mewn bloc block plane plaen bach block planes plaen bach block printing printio bloc block scree sgri bloc block screes sgri bloc block structure strwythur bloc block structured language iaith strwythur bloc block structured languages iaith strwythur bloc block structures strwythur bloc block tackle tacl floc block tackles tacl floc block wall wal flociau block walls wal flociau block work gwaith blociau block works gwaith blociau blockade gwarchae blockades gwarchae blockboard blocfwrdd blockboards blocfwrdd blocked account cyfrif gwaharddedig blocked accounts cyfrif gwaharddedig blocking anticyclone antiseiclon rhwystrol blocking anticyclones antiseiclon rhwystrol blocking factor ffactor flocio blocking factors ffactor flocio blocking hammer morthwyl blocio blocking hammers morthwyl blocio blocks bloc blocks and clamps blociau a chlampiau blockwork gwaith bloc / blociau blockworks gwaith bloc / blociau blood gwaed blood and iron gwaed a haearn blood bank banc gwaed blood banks banc gwaed blood circulation cylchrediad y gwaed blood circulations cylchrediad y gwaed blood clot tolchen blood clots tolchen blood clotting ceulo'r gwaed blood corpuscle corffilyn y gwaed blood corpuscles corffilyn y gwaed blood count cyfrif gwaed blood counts cyfrif gwaed blood donor rhoddwr gwaed blood donors rhoddwr gwaed blood feud cynnen waed (in general) blood feud galanas (in old Welsh law) blood feuds cynnen waed (in general) blood feuds galanas (in old Welsh law) blood glucose glwcos gwaed blood glucose level lefel glwcos yn y gwaed blood glucose levels lefel glwcos yn y gwaed blood glucoses glwcos gwaed blood group grŵp gwaed blood groups grŵp gwaed blood pressure pwysedd gwaed blood pressures pwysedd gwaed blood relationship perthynas drwy waed blood relationships perthynas drwy waed blood space gwagle gwaed blood spaces gwagle gwaed blood stream llif y gwaed blood streams llif y gwaed blood sugar siwgr gwaed blood sugars siwgr gwaed blood test prawf gwaed blood tests prawf gwaed blood transfusion trallwysiad gwaed blood transfusions trallwysiad gwaed blood-brain barrier gwahanfur gwaed-ymennydd blood-brain barriers gwahanfur gwaed-ymennydd blood-vessel pibell waed blood-vessels pibell waed bloodless revolution chwyldro di-drais bloodless revolutions chwyldro di-drais bloods gwaed bloody question cwestiwn marwol bloody questions cwestiwn marwol bloom blwm (industrial) blooms blwm (industrial) blotting paper papur sugno blotting papers papur sugno blouse blows blouses blows blouson blowson blousons blowson blow chwythu blow ergyd blow an EPROM chwythu EPROM blow holes chwythdyllau (casting) blow moulding chwythfowldio blow-hole mordwll blow-holes mordwll blower chwythwr blowers chwythwr blowlamp chwythlamp blowlamps chwythlamp blown sand tywod chwyth blown sands tywod chwyth blowpipe chwythbib blowpipes chwythbib blows ergyd blue bliw (for brightening clothes) blue glas (colour) blue baby baban glas blue flag award gwobr y faner las blue flag awards gwobr y faner las blue litmus solution hydoddiant litmws glas blue litmus solutions hydoddiant litmws glas blue precipitate gwaddod glas blue precipitates gwaddod glas blue red coch glas (crimson) blue reds coch glas (crimson) blue-collar worker gweithiwr coler las blue-collar workers gweithiwr coler las blueprint glasbrint blueprints glasbrint blues bliw (for brightening clothes) blues blues (=song) blues glas (colour) blues and violets gleision a fioledau blues singing canu'r felan bluff blwff bluffs blwff bluing glasu (decorative process) blunger peiriant cymysgu clai blungers peiriant cymysgu clai blunging cymysgu clai blunt pylu blunt pŵl bluntness pylni blur brycheuyn blur pylu blurs brycheuyn board astell (=plank) board bwrdd (in general) board and easel bwrdd ac îsl board based bwrdd seiliedig board loom gwŷdd bwrdd board looms gwŷdd bwrdd boarded astellog boarding school ysgol breswyl boarding schools ysgol breswyl boards astell (=plank) boards bwrdd (in general) boat neck gwddf bad boat necks gwddf bad bob line llinyn plwm bob lines llinyn plwm bobbin bobin bobbin case cas bobin bobbin cases cas bobin bobbin lace les bobin bobbin laces les bobin bobbin winder gwas dirwyn bobbin winders gwas dirwyn bobbins bobin bodice bodis bodice block bloc bodis bodice blocks bloc bodis bodice facing wynebyn bodis bodice facings wynebyn bodis bodices bodis bodily activity gweithgarwch corfforol bodkin botgin bodkins botgin body corff (in general) body gwrthrych (object) body awareness ymwybyddiaeth gorfforol body building foods bwydydd cryfhau'r corff body cavity ceudod y corff body cell corffgell body cells corffgell body clearance cliriad y dril (drill) body clearances cliriad y dril (drill) body colour lliw di-draidd body colours lliw di-draidd body control rheolaeth gorfforol body controls rheolaeth gorfforol body fluids hylifau'r corff body image delwedd y corff body images delwedd y corff body language iaith y corff body languages iaith y corff body management rheolaeth dros y corff body managements rheolaeth dros y corff body mass index indecs màs y corff body mass indexes indecs màs y corff body percussion taro'r corff body politic cenedl wleidyddol body politics cenedl wleidyddol body rhythm rhythm corff body rhythms rhythm corff body stain staen di-draidd body stains staen di-draidd body temperature tymheredd y corff body temperatures tymheredd y corff body tension tyndra'r corff body tensions tyndra'r corff body type math o gorff body types math o gorff body weight pwysau'r corff body-centred cubic ciwbig corff-ganolog body-centred cubic lattice dellten giwbig gorff-ganolog body-centred cubic lattices dellten giwbig gorff-ganolog body-centred cubics ciwbig corff-ganolog bodying-in llenwi'r mân dyllau bodyless digorff bodyless puppet pyped digorff bodyless puppets pyped digorff bog cors bog moss migwyn boil berwi boil cornwyd boiled egg wy wedi'i ferwi boiled eggs wy wedi'i ferwi boiled linseed oil olew had llin wedi'i ferwi boiled linseed oils olew had llin wedi'i ferwi boiled oil olew wedi'i ferwi boiled oils olew wedi'i ferwi boiled water dŵr wedi'i ferwi boiled waters dŵr wedi'i ferwi boiler boeler boilers boeler boiling berw boiling fowl iâr i'w berwi boiling fowls iâr i'w berwi boiling point berwbwynt boiling points berwbwynt boiling tube tiwb berwi boiling tubes tiwb berwi boiling water dŵr berw boiling waters dŵr berw boils cornwyd bold trwm (of type) bole boncyff (of tree) bolero bolero boles boncyff (of tree) bolson bolson bolsons bolson bolster bolster bolsters bolster bolt bollt bolt bolltio bolt catch clicied follt bolt catches clicied follt bolt cutter torrwr bollt bolt cutters torrwr bollt bolt tongs gefel follt bolted bolltiog bolted joint uniad bolltiog bolted joints uniad bolltiog bolts bollt bolus bolws bolus ground grwnd bolws bolus grounds grwnd bolws bomb calorimeter calorimedr bom bomb calorimeters calorimedr bom bombard peledu bombarding peledol bombardon bombardon bombardons bombardon bombed site safle wedi'i fomio bombed sites safle wedi'i fomio bond bond (financial and physics) bond bondio bond cwlwm agosrwydd (of relationship) bond dissociation energy egni daduno bond bond energy term term egni bond bond energy terms term egni bond bond failure gwrthod gafael bond polarity polaredd bond bond service taeogwasanaeth bond services taeogwasanaeth bond strength cryfder bond bond strengths cryfder bond bondage taeogaeth bondages taeogaeth bonded bondiog (finish) bonded fabric ffabrig bondiog bonded fabrics ffabrig bondiog bonded floor llawr wedi'i fondio bonded floors llawr wedi'i fondio bonded surface arwyneb bondiog bonded surfaces arwyneb bondiog bonded warehouse warws ecseis bonded warehouses warws ecseis bonding bondin (building material) bonding sefydlu cwlwm agosrwydd (of relationship) bonding adhesive adlyn bondio bonding adhesives adlyn bondio bonding agent cyfrwng bondio bonding agents cyfrwng bondio bondings bondin (building material) bonds bond (financial and physics) bonds cwlwm agosrwydd (of relationship) bondsman taeog bondsmans taeog bone asgwrn bone and hide glue glud asgwrn a chroen bone and hide glues glud asgwrn a chroen bone awl mynawyd asgwrn bone awls mynawyd asgwrn bone china tsieni asgwrn bone chinas tsieni asgwrn bone conduction dargludo drwy'r asgwrn bone folder plygell asgwrn bone folders plygell asgwrn bone marrow mêr bone marrows mêr bone scraper crafwr asgwrn bone scrapers crafwr asgwrn bones asgwrn bongo bongo boning tynnu esgyrn (in cooking) boning rod rhoden asgwrn boning rods rhoden asgwrn bonnet boned bonnets boned bonus bonws bonus payment tâl bonws bonus payments tâl bonws bony fish pysgodyn esgyrnog bony fishs pysgodyn esgyrnog boogie-woogie bwgi-wgi boogie-woogies bwgi-wgi book archebu (=make a reservation) book llyfr book binder rhwymwr llyfrau book binders rhwymwr llyfrau book binding rhwymo llyfrau book craft crefft llyfrau book crafts crefft llyfrau book jacket siaced lwch book jackets siaced lwch book leather lledr llyfr book leathers lledr llyfr book trough cafn llyfrau book troughs cafn llyfrau book-end bwtres llyfrau book-ends bwtres llyfrau book-plate plât llyfr book-plates plât llyfr bookbinder's bench mainc rhwymo llyfrau bookbinder's benches mainc rhwymo llyfrau bookbinder's press gwasg rhwymwr llyfrau bookbinding cloth lliain rhwymo llyfrau bookbinding cloths lliain rhwymo llyfrau bookcase cwpwrdd llyfrau bookcases cwpwrdd llyfrau bookcloth lliain llyfrau bookcloths lliain llyfrau booking bwciad booking checklist rhestr wirio bwcio booking checklists rhestr wirio bwcio booking form ffurflen bwcio booking forms ffurflen bwcio bookings bwciad booklet llyfryn booklets llyfryn bookmark nod tudalen bookmarks nod tudalen bookrack rhesel lyfrau bookracks rhesel lyfrau books llyfr bookshelf silff lyfrau bookshelfs silff lyfrau boom bŵm (on boat) boom ffyniant (in industry, economy) boom trawst (at harbour mouth) boombams bwmbamau booming ffyniannus booms bŵm (on boat) booms ffyniant (in industry, economy) booms trawst (at harbour mouth) booster atgyfnerthol booster cyfnerthydd (for electrical power) booster dose dos atgyfnerthol booster doses dos atgyfnerthol booster injection pigiad atgyfnerthol booster injections pigiad atgyfnerthol boosters cyfnerthydd (for electrical power) boot cicio (=kick) boot esgid (for rugby, soccer etc) booth bwth booths bwth boots esgid (for rugby, soccer etc) bootstrap loader ymlwythwr bootstrap loaders ymlwythwr bootstrapping ymlwytho boracic glaze gwydredd borasig boracic glazes gwydredd borasig borax boracs borax cone côn boracs borax cones côn boracs borax palette palet boracs borax palettes palet boracs boraxes boracs border border (on paper, materials) border goror (of area, country) border design dyluniad border border designs dyluniad border bordered pits mân-bantiau gweflog borderer bordar (=tenant) borderers bordar (=tenant) borderline ffin borderline ffiniol borderline candidate ymgeisydd ffiniol borderline candidates ymgeisydd ffiniol borderline case achos ffiniol borderline cases achos ffiniol borderline reviewing adolygu'r achosion ffiniol borderlines ffin borders border (on paper, materials) borders goror (of area, country) bore eger (of tidal wave) bore tyllfedd (=diameter) bore tyllu (=make a hole) bore box blwch tyllu bore boxes blwch tyllu bore-hole twll turio bore-holes twll turio bored diflas (=fed up) boredom diflastod boredoms diflastod borer tyllwr borers tyllwr bores eger (of tidal wave) bores tyllfedd (=diameter) boring diflas (=uninteresting) boring bar bar tyllu boring bars bar tyllu boring tool erfyn tyllu boring tools erfyn tyllu boron boron (B) boron trifluoride boron trifflworid boron trifluorides boron trifflworid borons boron (B) borough bwrdeistref borough corporation corfforaeth y fwrdeistref borough corporations corfforaeth y fwrdeistref borough franchise etholfraint fwrdeistrefol borough franchises etholfraint fwrdeistrefol borough history hanes bwrdeistrefol boroughs bwrdeistref borrow benthyca borrowed light golau benthyg borrowed lights golau benthyg borrower benthyciwr borrowers benthyciwr boss bogail (of shield) boss cnap (=protuberance) boss dwrn addurnedig bossing mallet gordd ben wy bossing mallets gordd ben wy bote budd botes budd bottle potel bottle feeding bwydo o'r botel bottle warmer gwresogydd potel bottle warmers gwresogydd potel bottleneck tagfa bottlenecks tagfa bottles potel bottom gwaelod bottom drawer rail rheilen waelod drôr bottom drawer rails rheilen waelod drôr bottom edge ymyl waelod bottom edges ymyl waelod bottom frame ffrâm waelod bottom frames ffrâm waelod bottom fuller pannydd isaf bottom fullers pannydd isaf bottom gear gêr isaf bottom gears gêr isaf bottom part darn gwaelod bottom parts darn gwaelod bottom rail rheilen isaf bottom rails rheilen isaf bottom rake gwyredd gwaelod bottom rakes gwyredd gwaelod bottom set bed gwely is-haen bottom set beds gwely is-haen bottom swage darfath isaf bottom swages darfath isaf bottom-up programming rhaglennu adeiladol bottoming stake bonyn gwaelodi bottoming stakes bonyn gwaelodi bottoming tap tap gwaelodi bottoming taps tap gwaelodi bottoms gwaelod botulism botwliaeth botulisms botwliaeth bouclé bouclé bouclé yarn edafedd bouclé bouclés bouclé bough cangen boughs cangen boulder clogfaen boulder choke tagfa glogfeini boulder chokes tagfa glogfeini boulder clay clog-glai boulders clogfaen bounce sbonc bounce sboncio bounce back adlam bounce back adlamu bounce backs adlam bounce of the ball sbonc y bêl bounce on the ground sboncio ar y ddaear bounce pass pàs sboncio bounces sbonc bound arffin (=limitation) bound llam (=jump) bound llamu (=jump) bound rhwym (of electron) bound buttonhole twll botwm wedi'i rwymo bound buttonholes twll botwm wedi'i rwymo bound by contract rhwym dan gontract bound opening agoriad rhwymog bound openings agoriad rhwymog bound slot pocket poced agen bound slot pockets poced agen boundary ffin boundary terfyn (fence) boundary conditions amodau ffin boundary layer haen ffin boundary layers haen ffin bounded ffinedig bounded variation amrywiad ffinedig bounded variations amrywiad ffinedig bounding plane plân terfyn bounding planes plân terfyn bounds arffin (=limitation) bounds llam (=jump) bouquet garni bouquet garni bouquet garnis bouquet garni bourgeois bourgeois bourgeoisie bourgeoisie bourgeoisies bourgeoisie bourn nant hafesb bourns nant hafesb bourrée bourrée bourrées bourrée bout bowt bouts bowt bovate bufedd bovates bufedd bow bwa (for archery) bow crymu (=bend) bow dolen (in needlework) bow tynnu bwa (with stringed instrument) bow ymgrymiad (=inclination of the head or trunk) bow ymgrymu (=incline the head or trunk) bow case cas bwa bow cases cas bwa bow down bwa i lawr bow knot cwlwm dolen bow knot pattern patrwm cwlwm dolen bow knot patterns patrwm cwlwm dolen bow knots cwlwm dolen bow side ochr dde (in rowing) bow sides ochr dde (in rowing) bow tie tei bô bow ties tei bô bow up bwa i fyny bow window ffenestr fwa bow windows ffenestr fwa bow-fronted blaengrwm bow-saw llif fwa bow-saws llif fwa bow-stringed truss cwpl bwaog bowed harp telyn fwa bowed harps telyn fwa bowel perfedd bowels perfedd bowing bwa-nodi (in a score) bowl bowliad (=action of bowling) bowl bowlio bowl powlen bowl out bowlio allan bowl over the wicket bowlio dros y wiced bowl overarm bowlio dros ysgwydd bowl round the wicket bowlio rownd y wiced bowl underarm bowlio dan ysgwydd bowled ball pelen bowled balls pelen bowler bowliwr bowlers bowliwr bowlful powlaid bowlfuls powlaid bowline bowlin bowlines bowlin bowling crease cris bowlio bowling creases cris bowlio bowling method dull o fowlio bowling methods dull o fowlio bowling speed cyflymder y bowlio bowling speeds cyflymder y bowlio bowls bowliad (=action of bowling) bowls powlen bowstring llinyn bwa bowstrings llinyn bwa box blwch (in general) box bocs (gymnastic apparatus) box bocsio box angle plate plât ongl blwch box angle plates plât ongl blwch box construction adeiladwaith blwch box constructions adeiladwaith blwch box crosswise bocs ar groes box crosswises bocs ar groes box frame ffrâm bocs box frames ffrâm bocs box joint uniad blwch box joints uniad blwch box lengthwise bocs ar hyd box lengthwises bocs ar hyd box lock clo blwch box locks clo blwch box pleat plet bocs box pleat opening agoriad plet bocs box pleat openings agoriad plet bocs box pleats plet bocs box spanner sbaner blwch box spanners sbaner blwch box square sgwâr blwch box squares sgwâr blwch box tongs gefel flwch box wood pren bocs box woods pren bocs box-trap magl-flwch box-traps magl-flwch boxwood mallet gordd pren bocs boxwood mallets gordd pren bocs boxwood ruler riwl pren bocs boxwood rulers riwl pren bocs boy bachgen boycott boicotio brace carntro (=device for clamping) brace cledd (=cleat) brace cleddu (=cleat) brace cyplysydd (=mark in printing, music) brace ffrâm ddannedd (for teeth) brace tynhau (the bow) brace and bit carntro ac ebill braced cleddog braced door drws cleddog braced doors drws cleddog braced truss cwpl cleddog bracer breichydd bracers breichydd braces carntro (=device for clamping) braces cledd (=cleat) braces cyplysydd (=mark in printing, music) braces ffrâm ddannedd (for teeth) brachial breichiol bracket braced (for shelving) bracket cromfach (=printing mark) bracket foot troed fraced bracket foots troed fraced bracketing bracedu brackets braced (for shelving) brackets cromfach (=printing mark) brackish water dŵr lled hallt brackish waters dŵr lled hallt bract bract bract scales cen bract bracteole bractolyn bracteoles bractolyn bracts bract brad hoelen fain (cut nail) bradawl mynawyd bradawls mynawyd brads hoelen fain (cut nail) bradycardia bradycardia bradycardias bradycardia braid brêd braid loom gwŷdd brêd braid looms gwŷdd brêd braided river afon blethog braided rivers afon blethog braiding plethu braids brêd brain ymennydd brain damage niwed i'r ymennydd brain damages niwed i'r ymennydd brain dead ymennydd yn farw brain death marwolaeth yr ymennydd brain deaths marwolaeth yr ymennydd brain scanning sganio'r ymennydd brain storming ystyried syniadau brains ymennydd braise brwysio brake brêc brake block bloc brêc brake blocks bloc brêc brake cylinder silindr brêc brake cylinders silindr brêc brake drum drwm brêc brake drums drwm brêc brake fluid hylif brêc brake fluids hylif brêc brake handle dolen frêc brake handles dolen frêc brake horse power marchnerth brêc brake horse powers marchnerth brêc brake lever lifer brêc brake levers lifer brêc brake resistance gwrthedd brêc brake resistances gwrthedd brêc brake shoe esgid brêc brake shoes esgid brêc brake wheel olwyn frêc brake wheels olwyn frêc brakes brêc braking distance pellter brecio braking distances pellter brecio bran bran branch cangen branch ffatri gangen (factory) branch ymganghennu branch circumference cylchedd cangen branch circumferences cylchedd cangen branch development datblygiad cangen branch developments datblygiad cangen branch line lein gangen branch lines lein gangen branch pipe pibell gangen branch pipe junction cydiad pibell gangen branch pipe junctions cydiad pibell gangen branch pipes pibell gangen branch prism prism cangen branch prisms prism cangen branch shop siop gangen branch shops siop gangen branched canghennog branched terminals of the axon terfyniadau canghennog yr acson branches cangen branches ffatri gangen (factory) branchia tagell (=gill) branchial tagellog branchias tagell (=gill) branching database cronfa ddata ganghennog branching databases cronfa ddata ganghennog branching programme rhaglen ganghennog branching programmes rhaglen ganghennog brand brand (=make of goods) brand gwarthnodi (=mark with disgrace) brand image delwedd brand brand images delwedd brand brand name enw brand brand names enw brand branded goods nwyddau brand brandering brandro brands brand (=make of goods) brandy brandi brandy butter menyn brandi brandy butters menyn brandi brandy snap crimpen frandi brandy snaps crimpen frandi brans bran brash malurion brass pres brass backed cefn pres brass backeds cefn pres brass bush bwsh pres brass bushs bwsh pres brass drawing pin pìn bawd pres brass drawing pins pìn bawd pres brass eyelet llygaden bres brass eyelets llygaden bres brass filings efyddlifion brass handle dolen bres brass handles dolen bres brass head nail hoelen ben pres brass head nails hoelen ben pres brass instrument offeryn pres brass instruments offeryn pres brass nail hoelen bres brass nails hoelen bres brass rubbing rhwbiad pres brass rubbings rhwbiad pres brass screw sgriw bres brass screws sgriw bres brass section adran bres brass sections adran bres brass solo unawd pres brass wire gwifren bres brass wires gwifren bres brassback saw llif gefn bres brassback saws llif gefn bres brassica crop cnwd bresych brassica crops cnwd bresych bravura brafwra bravuras brafwra brawn cosyn pen brawns cosyn pen brayer rholer (roller) brayers rholer (roller) braze presyddu brazed joint uniad wedi'i bresyddu brazed joints uniad wedi'i bresyddu brazing clamp clamp presyddu brazing clamps clamp presyddu brazing hearth aelwyd bresyddu brazing hearths aelwyd bresyddu brazing process proses bresyddu brazing spelter sbelter presyddu brazing spelters sbelter presyddu brazing torch tortsh bresyddu brazing torches tortsh bresyddu brazing wire gwifren bresyddu brazing wires gwifren bresyddu breach bwlch (=gap) breach bylchu (=break through) breach llamu (of whales etc) breach of contract tor-contract breach of duty tor-dyletswydd breach of peace tor-heddwch breached bylchog breaches bwlch (=gap) bread bara bread and butter bara menyn bread and butter pudding pwdin bara menyn bread and butter puddings pwdin bara menyn bread and butters bara menyn bread crumbs briwsion bara bread roll rholyn bara bread rolls rholyn bara breadboard bwrdd bara breadboards bwrdd bara breads bara breadth lled breadths lled break toriad break torri break crop cnwd saib break crops cnwd saib break even adennill costau break even chart siart adennill costau break even charts siart adennill costau break frequency amledd torri break ground torri tir break joint uniad toriad break joints uniad toriad break line llinell doriad break lines llinell doriad break loan torfenthyciad break loans torfenthyciad break the wicket torri'r wiced break with Rome torri oddi wrth Rufain breakage toriad breakages toriad breakdown methiant (=failure) breakdown torri i lawr (of machinery) breakdown ymddatodiad (=disintegration) breakdowns methiant (=failure) breakdowns ymddatodiad (=disintegration) breaker moryn (of wave) breakers moryn (of wave) breakfast brecwast breakfast cereal grawnfwyd brecwast breakfast cereals grawnfwyd brecwast breakfasts brecwast breaking news newyddion sy’n torri breaking of voice llais yn torri breakpoint torbwynt breakpoints torbwynt breaks toriad breakwater morglawdd breakwaters morglawdd bream gwrachen ddu breams gwrachen ddu breast brest (in general) breast bron (of woman) breast drill dril brest breast drills dril brest breast feeding bwydo o'r fron breast self-examination hunan archwiliad o’r fron breast self-examinations hunan archwiliad o’r fron breast shot wheel rhod ffrwd ganol breast shot wheels rhod ffrwd ganol breasts brest (in general) breasts bron (of woman) breaststroke nofio broga breath anadl breath mark marc anadlu breath marks marc anadlu breathe anadlu breathed sound sain anadl breathed sounds sain anadl breathing exercise ymarfer anadlu breathing exercises ymarfer anadlu breathing movement symudiad anadlu breathing movements symudiad anadlu breathing rate cyfradd anadlu breathing rates cyfradd anadlu breathless byr ei anadl (with masculine nouns) breathless byr ei hanadl (with feminine nouns) breaths anadl breech birth esgoriad ffolennol breech births esgoriad ffolennol breeches clos pen-glin breed brid breed bridio breeder reactor adweithydd bridiol breeder reactors adweithydd bridiol breeding cycle cylchred fridio breeding cycles cylchred fridio breeds brid breeze awel (=light wind) breeze chwa (blues) breeze block bloc bris breeze blocks bloc bris breeze slab slab bris breeze slabs slab bris breezes awel (=light wind) breezes chwa (blues) breve brif breves brif brevet dogfen braint filwrol brevets dogfen braint filwrol breviary llyfr gwasanaeth brew bragu (alcohol) brew bwrw ffrwyth (of tea) bribe llwgrwobr bribe llwgrwobrwyo bribery and corruption llwgrwobrwyo a llygru bribes llwgrwobr brick bricsen brick clay bric-glai brick cutting torri briciau brick dust llwch brics brick dusts llwch brics brick earth bric-bridd brick earths bric-bridd bricks bricsen brickwork bricwaith brickworks bricwaith bricolage bricolage bricolages bricolage bride-price cowyll bride-prices cowyll bridge pont bridge pontio bridge circuit cylched bont bridge circuits cylched bont bridge passage pont bridge passages pont bridge point man pontio bridge points man pontio bridge tone traws-dôn bridge tones traws-dôn bridgehead blaenlaniad (military) bridgehead talbont (in architecture) bridgeheads blaenlaniad (military) bridgeheads talbont (in architecture) bridges pont bridging course cwrs pontio bridging courses cwrs pontio bridging joist trawst pontio (flooring) bridging joists trawst pontio (flooring) bridging loan benthyciad dros dro bridging loans benthyciad dros dro bridle ffrwyn bridle ffrwyno bridle bit genfa ffrwyn bridle bits genfa ffrwyn bridle joint uniad bagl bridle joints uniad bagl bridles ffrwyn brief briff brief byr (in general) brief rhagbaratoi brief outline amlinelliad byr brief outlines amlinelliad byr briefs briff brigade brigâd brigades brigâd brigand gwylliad brigands gwylliad bright llachar bright colour lliw llachar bright colours lliw llachar bright dip dip gloywi bright dips dip gloywi bright drawn bars barrau gloyw bright drawn mild steel dur meddal gloyw wedi'i dynnu (B.D.M.S.) bright drawn mild steels dur meddal gloyw wedi'i dynnu (B.D.M.S.) bright mild steel dur meddal gloyw (B.M.S.) bright mild steels dur meddal gloyw (B.M.S.) bright orange oren llachar (enamelling colour) bright oranges oren llachar (enamelling colour) bright red heat gwres cochias (cherry red) bright red heats gwres cochias (cherry red) bright yellow heat gwres eirias bright yellow heats gwres eirias brightness disgleirdeb brightness control rheolydd disgleirdeb brightness controls rheolydd disgleirdeb brill bril brilliance disgleirdeb brilliance of colour disgleirdeb lliw brilliances disgleirdeb brilliant llachar brilliant blue glas llachar brilliant blues glas llachar brilliant colour lliw llachar brilliant colours lliw llachar brilliant green gwyrdd llachar brilliant greens gwyrdd llachar brills bril brine heli brine test prawf heli brine tests prawf heli brines heli bring-and-buy moes a phryn brinkmanship hwylio yn agos i'r gwynt brioche brioche brioches brioche brisket brisged briskets brisged brisling corbennog brislings corbennog bristle blewyn (of brush) bristle gwrychyn (of animal) bristle brush brwsh blew bristle brushs brwsh blew bristles blewyn (of brush) bristles gwrychyn (of animal) brittle brau brittleness breuder broach cŷn main (=bit for boring) broaches cŷn main (=bit for boring) broad llydan broad beans ffa broad pen pen llydan broad pen lettering llythrennu pen llydan broad pens pen llydan broad trend tuedd gyffredinol broad trends tuedd gyffredinol broadcast darllediad broadcast darlledu broadcasts darllediad broaden lledu broadleaved llydanddail broadleaved tree coeden lydanddail broadleaved trees coeden lydanddail broadsheet papur safonol broadsheets papur safonol brocade brocêd brocades brocêd broccoli brocoli broderie anglaise broderie anglaise broderie anglaises broderie anglaise broiler cyw brwylio broilers cyw brwylio broken cadence diweddeb annisgwyl broken cadences diweddeb annisgwyl broken chord cord gwasgar broken chords cord gwasgar broken colour rhaniadliw broken colours rhaniadliw broken consort consort cymysg broken consorts consort cymysg broken line llinell doredig broken lines llinell doredig broker brocer brokerage broceriaeth brokerages broceriaeth brokers brocer brominate bromineiddio bromination bromineiddiad brominations bromineiddiad bromine bromin (Br) bromine water dŵr bromin bromine waters dŵr bromin bromines bromin (Br) bromoethane bromoethan bromoethanes bromoethan bronchiole bronciolyn bronchioles bronciolyn bronchitis broncitis bronchus broncws bronze efydd bronze alloy aloi efydd bronze green gwyrdd efydd (enamelling colour) bronze greens gwyrdd efydd (enamelling colour) bronze hoard celc efydd bronze hoards celc efydd bronzes efydd brooch tlws brooch back cefn tlws brooch backs cefn tlws brooch pin tlysbin brooch pins tlysbin brooches tlws broom ysgubell brooms ysgubell broomstick coes ysgubell broomsticks coes ysgubell broth potes brotherhood brawdoliaeth brotherhoods brawdoliaeth broths potes brow ael brown brown brown brownio brown bread bara brown brown breads bara brown brown coal glo brown brown coals glo brown brown earth pridd brown brown earth soil pridd brown brown earth soils pridd brown brown earths pridd brown brown paper papur llwyd brown paper tape tâp papur llwyd brown paper tapes tâp papur llwyd brown papers papur llwyd brown sugar siwgr coch (demerara) brown sugars siwgr coch (demerara) brownish brownaidd browns brown brownshirts crysau brown brows ael browse pori bruise clais bruise cleisio bruises clais brush brwsh brush brwsio brush care gofal brwsh brush cares gofal brwsh brush handle coes brwsh brush handles coes brwsh brush polish llathrydd brwsh brush polishs llathrydd brwsh brush stand stand brwshys brush stands stand brwshys brush stroke strôc brwsh brush strokes strôc brwsh brushed gwlanog (finish) brushed cotton cotwm gwlanog brushed cottons cotwm gwlanog brushed nylon neilon gwlanog brushed nylons neilon gwlanog brushs brwsh brushwood prysgwydd brushwork brwshwaith brushworks brwshwaith bryophyte bryoffyt bryophytes bryoffyt bubble byrlymu bubble gyrru swigod drwy bubble swigen bubbles swigen buccal cavity ceudod bochaidd buccaneer bycanîr buccaneers bycanîr buck ebol (in gymnastics) buck crosswise ebol ar groes buck crosswises ebol ar groes bucket bwced buckets bwced buckle bwcl buckle bwclo buckle crychu buckler bwcler bucklers bwcler buckles bwcl buckram bwcram buckrams bwcram bucks ebol (in gymnastics) buckwheat gwenith yr hydd buckwheats gwenith yr hydd bud blaguro bud blaguryn bud scale cen blaguro bud scales cen blaguro budding ymflagurol budgerigar green gwyrdd bwdgerigar (enamelling colour) budgerigar greens gwyrdd bwdgerigar (enamelling colour) budget cyllideb budget cyllidebu budget account cyfrif cyllido budget accounts cyfrif cyllido budget deficit diffyg cyllidol budget deficits diffyg cyllidol budget share cyfran o'r gyllideb budget shares cyfran o'r gyllideb budgetary cyllidol budgetary arrangement trefniant cyllidol budgetary arrangements trefniant cyllidol budgetary control rheolaeth gyllidol budgetary controls rheolaeth gyllidol budgets cyllideb buff bwff buff bwffio buff mop mop bwffio buff mops mop bwffio buff wheel olwyn fwffio buff wheels olwyn fwffio buffer byffer buffer byffro buffer beam trawst byffer buffer beams trawst byffer buffer solution hydoddiant byffer buffer solutions hydoddiant byffer buffer spring sbring byffer buffer springs sbring byffer buffer state gwladwriaeth glustog buffer states gwladwriaeth glustog buffered input mewnbwn byfferog buffered inputs mewnbwn byfferog buffered output allbwn byfferog buffered outputs allbwn byfferog buffers byffer buffet bwffe buffets bwffe buffs bwff bug nam (=fault) bugle biwgl bugles biwgl build adeiladu build in ymgorffori building adeilad building insurance yswiriant adeiladau building insurances yswiriant adeiladau building regulation rheoliad adeiladu building regulations rheoliad adeiladu building society cymdeithas adeiladu building survey arolwg adeiladu building surveyor syrfëwr adeiladu building surveyors syrfëwr adeiladu building technology technoleg adeiladu building use survey arolwg defnyddio adeiladau buildings adeilad buildings and structures adeiladau ac adeileddau built environment sector sector amgylchedd adeiledig built environment sectors sector amgylchedd adeiledig built-in cupboard cwpwrdd gosod built-in cupboards cwpwrdd gosod built-up area ardal adeiledig built-up areas ardal adeiledig built-up stain staen adeiledig built-up stains staen adeiledig bulb bwlb bulb holder gafaelydd bwlb bulb holders gafaelydd bwlb bulbous oddfog bulbous leg coes oddfog bulbous legs coes oddfog bulbous turnery turnwriaeth oddfog bulbs bwlb bulge bolio bulge gwrym bulges gwrym bulimia bwlimia bulimias bwlimia bulk swmp bulk buying swmp brynu bulk carrier swmp gludydd bulk carriers swmp gludydd bulk materials defnyddiau swmp bulk of the goods rhan fwyaf o'r nwyddau bulk storage storfa swmp bulk storages storfa swmp bulk supplies cyflenwadau sylweddol bulk tank swmp-danc bulk tanks swmp-danc bulk transport swmpgludo bulked yarn edafedd wedi'u swmpuso bulkflow swmplif bulkflows swmplif bulking action gweithred swmpuso bulking actions gweithred swmpuso bulks swmp bulky swmpus bulky goods nwyddau swmpus bull bwla (papal) bull wheel olwyn strôc (shaper) bull wheels olwyn strôc (shaper) bull-nosed plane plaen trwyn byr bull-nosed planes plaen trwyn byr bulleted list rhestr o bwyntiau bwled bulleted lists rhestr o bwyntiau bwled bulletin bwletin bulletin board hysbysfwrdd bulletin boards hysbysfwrdd bulletins bwletin bullion bwliwn bullions bwliwn bulls bwla (papal) bully bwli (in hockey) bully off bwlïo bumper bymper bumpers bymper bun bynen bunch grass sypwellt (tussock) bund bwnd bundle sypyn bundle sheath gwain sypyn bundle sheaths gwain sypyn bundles sypyn bunds bwnd bung topyn bungaloid growth twf byngaloaidd bungaloid growths twf byngaloaidd bungalow byngalo bungalows byngalo bungs topyn bunny jump naid cwningen bunny jumps naid cwningen bunt hit bwnt bunt hits bwnt buoy bwi buoyancy hynofedd buoyancy bag bag hynofedd buoyancy bags bag hynofedd buoyancy tank tanc hynofedd buoyancy tanks tanc hynofedd buoyant hynawf bur masgl pigog (of plant) buran bwrán burans bwrán burden baich burdens baich bureau biwro bureau fall clawr biwro bureau falls clawr biwro bureaucracy biwrocratiaeth bureaucrat biwrocrat bureaucratic biwrocrataidd bureaucrats biwrocrat bureaus biwro burette bwred burettes bwred burgage tir bwrdais burgage borough bwrdeistref fwrgais burgage boroughs bwrdeistref fwrgais burgage tenure daliadaeth fwrgeisiol burgage tenures daliadaeth fwrgeisiol burgages tir bwrdais burgher bwrdais burghers bwrdais burghol bwrdeisiol burial claddedigaeth burial chamber siambr gladdu burial chambers siambr gladdu burial ground man claddu burial grounds man claddu burial mound tomen gladdu burial mounds tomen gladdu burials claddedigaeth burin ysgythrydd (graver) burins ysgythrydd (graver) burlap bwrlap burlaps bwrlap burlesque bwrlesg burlesques bwrlesg burn llosg burn llosgi burn out llwyrlosgi burn-out chwythu plwc burner llosgydd burners llosgydd burnish bwrnais burnish bwrneisio burnisher bwrneisydd burnishers bwrneisydd burnishs bwrnais burns llosg burns unit uned losgiadau burns units uned losgiadau burnt llosg burnt offering poethoffrwm burnt offerings poethoffrwm burnt sienna sienna llosg burnt siennas sienna llosg burnt umber wmber llosg burnt umbers wmber llosg burpee naid wasg burpees naid wasg burr bwr (in timber) burr min (of scraper) burr ymyl arw (on metal or paper) burrow daear (of fox) burrow twll (of rabbits) burrowing tyrchu burrows daear (of fox) burrows twll (of rabbits) burrows twyni (of sand) burrs bwr (in timber) burrs min (of scraper) burrs ymyl arw (on metal or paper) bursar bwrsar bursars bwrsar bursary bwrsari burst ebychiad burst of monsoon toriad y monsŵn burster ffrwydriad bursters ffrwydriad bursts ebychiad bus bws bus type math bws bus types math bws bush bwsh (=metal lining) bush llwyn (=shrub) bushel bwysel bushels bwysel bushmen pobl y prysglwyni bushmens pobl y prysglwyni bushs bwsh (=metal lining) bushs llwyn (=shrub) bushveld ffeld prysglwyni bushvelds ffeld prysglwyni bushy trwchus business busnes business account cyfrif busnes business accounts cyfrif busnes business activity gweithgaredd busnes business development datblygu busnes business document dogfen busnes business documents dogfen busnes business environment amgylchedd busnes business environments amgylchedd busnes business ethics moeseg busnes business function swyddogaeth fusnes business functions swyddogaeth fusnes business objective amcan busnes business objectives amcan busnes business plan cynllun busnes business plans cynllun busnes business rates trethi busnes business system system fusnes business systems system fusnes business user defnyddiwr busnes business users defnyddiwr busnes bust mynwes (=human chest) bust penddelw (in sculpture) bustline llinell fynwes bustlines llinell fynwes busts mynwes (=human chest) busts penddelw (in sculpture) butane bwtan butanes bwtan butcher cigydd butchers cigydd butt bytio butt bôn butt brazed presyddiad bôn (lathe toll forms) butt brazeds presyddiad bôn (lathe toll forms) butt end rammer hyrddwr pen ôl butt end rammers hyrddwr pen ôl butt hinge colfach ymyl butt hinges colfach ymyl butt joint uniad bôn butt joints uniad bôn butt measurement mesuriad bôn butt measurements mesuriad bôn butt mitred and keyed joint uniad bôn meitrog cudd butt mitred and keyed joints uniad bôn meitrog cudd butt mitred joint uniad bôn meitrog butt mitred joints uniad bôn meitrog butt weld weldiad bôn butt welds weldiad bôn butter menyn butter beans ffa menyn butter-nut pattern patrwm cnau menyn butter-nut patterns patrwm cnau menyn butterfat braster menyn butterfats braster menyn butterfish llyfrothen butterfishs llyfrothen butterfly glöyn byw butterfly hinge colfach glöyn byw butterfly hinges colfach glöyn byw butterfly stroke nofio pilipala buttermilk llaeth enwyn buttermilks llaeth enwyn butters menyn butterscotch cyflaith menyn butterscotches cyflaith menyn buttock ffolen buttocks ffolen button botwm button botymu button mortise mortais botwm button mortises mortais botwm button mould mowld botwm button moulds mowld botwm button polish llathr botwm button polishs llathr botwm button slot slot botwm button slots slot botwm buttonhole twll botwm buttonhole loop dolen botwm buttonhole loops dolen botwm buttonhole scissors siswrn twll botwm buttonhole stitch pwyth twll botwm buttonhole stitches pwyth twll botwm buttonhole thread edau gyfrodedd buttonhole threads edau gyfrodedd buttonholer botymell buttonholers botymell buttonholes twll botwm buttons botwm buttress bwtres (in needlework) buttress gwanas (on mountain) buttress thread edau fwtres buttress threads edau fwtres butts bôn butylate bwtyleiddio butyrate bwtyrad butyrates bwtyrad butyric acid asid bwtyrig butyric acids asid bwtyrig buy prynu buyer prynwr buyers prynwr buying price pris prynu buying prices pris prynu buzzer swnyn buzzers swnyn by instalment fesul rhandal by-election isetholiad by-elections isetholiad by-law deddf leol (=local law) by-law is-ddeddf (=subsidiary law) by-laws deddf leol (=local law) by-laws is-ddeddf (=subsidiary law) by-movement symudiad sgil by-movements symudiad sgil by-product sgil gynnyrch by-products sgil gynnyrch bye heibiad bye-stakes cil fonynnau bypass around a settlement ffordd osgoi aneddiadau bypass around a settlements ffordd osgoi aneddiadau byte beit bytes beit byway cilffordd byway open to all traffic cilffordd yn agored i bob trafnidiaeth cabbage bresychen cabbages bresychen cabin hook bach caban cabin hooks bach caban cabin lift caban codi cabin lifts caban codi cabinet cabinet cabinet file ffeil gabinet cabinet files ffeil gabinet cabinet fittings ffitiadau cabinet cabinet maker saer dodrefn cabinet makers saer dodrefn cabinet organ organ gist cabinet organs organ gist cabinet rasp rhathell gabinet cabinet rasps rhathell gabinet cabinet scraper sgrafell gabinet cabinet scrapers sgrafell gabinet cabinet screwdriver tyrnsgriw cabinet cabinet screwdrivers tyrnsgriw cabinet cabinet work gwaith dodrefn cabinet works gwaith dodrefn cabinets cabinet cable cebl cable smocking smocwaith rhaff cable smockings smocwaith rhaff cable stitch pwyth rhaff cable stitches pwyth rhaff cable yarn edafedd rhaffog cables cebl cabriole leg coes gabriol cabriole legs coes gabriol cache store storfa dros dro cache stores storfa dros dro cacophonous cacoffonig cacophony cacoffoni cactus cactws cadaver celain cadavers celain cadence diweddeb cadence chord cord diweddeb cadence chords cord diweddeb cadences diweddeb cadential diweddebol cadential 6/4 diweddeb 6/4 cadential 6/4 chord cord 6/4 diweddebol cadential 6/4 chords cord 6/4 diweddebol cadential 6/4s diweddeb 6/4 cadenza cadenza cadenzas cadenza cadmium cadmiwm (Cd) cadmium orange oren cadmiwm cadmium oranges oren cadmiwm cadmium red coch cadmiwm cadmium reds coch cadmiwm cadmium scarlet sgarlad cadmiwm cadmium scarlets sgarlad cadmiwm cadmium yellow melyn cadmiwm cadmium yellows melyn cadmiwm cadmiums cadmiwm (Cd) caducous byrhoedlog (=fleeting, transitory) caducous cwympol (in botany) caecum caecwm caecums caecwm caesium cesiwm (Cs) caesium chloride cesiwm clorid caesium chlorides cesiwm clorid caesium surface arwyneb cesiwm caesium surfaces arwyneb cesiwm caesiums cesiwm (Cs) caffeine caffein caffeines caffein café caffi cafés caffi cage cawell cages cawell cairn carnedd cairns carnedd cake teisen cake glue glud slab cake glues glud slab cakes teisen calamine calamin calamines calamin calcareous calchaidd calcification calcheiddiad calcifications calcheiddiad calcified matrix matrics calcheiddiedig calcified matrixes matrics calcheiddiedig calcifuge calchgas calcify calcheiddio calcinate calchynnu calcination calchyniad calcinations calchyniad calciphile calchgar calciphobe calchgas calcite calchit calcites calchit calcitonin calsitonin calcitonins calsitonin calcium calsiwm (Ca) calcium carbide calsiwm carbid calcium carbides calsiwm carbid calcium carbonate calsiwm carbonad calcium carbonates calsiwm carbonad calcium oxide calsiwm ocsid calcium oxides calsiwm ocsid calcium silicate calsiwm silicad calcium silicates calsiwm silicad calciums calsiwm (Ca) calculate cyfrifo calculating machine peiriant cyfrifo calculating machines peiriant cyfrifo calculating method dull cyfrifo calculating methods dull cyfrifo calculation cyfrifiad calculations cyfrifiad calculator cyfrifiannell calculator display dangosydd cyfrifiannell calculators cyfrifiannell calculus calcwlws calculus of variation calcwlws amrywiad caldera callor calderas callor calendar calendr calendars calendr calf croth y goes (of leg) calf muscle cyhyr croth y goes calf muscles cyhyr croth y goes calfs croth y goes (of leg) calgon calgon calgons calgon calibrate graddnodi calibrated wedi'i graddnodi (with feminine nouns) calibrated wedi'i raddnodi (with masculine nouns) calibration graddnodiad calibration constant cysonyn graddnodiad calibration constants cysonyn graddnodiad calibration mark graddnod calibration marks graddnod calibrations graddnodiad calico calico calico buff bwff calico calico buffs bwff calico calico mop mop calico calico mops mop calico calico patch clwt calico calico patches clwt calico californium califforniwm (Cf) californiums califforniwm (Cf) calkin cawc (horse shoe) calkins cawc (horse shoe) call galw call galwad call by name galw wrth enw call by value galw wrth werth calligraphic caligraffig calligraphic hand llaw galigraffig calligraphic hands llaw galigraffig calligraphist caligraffydd calligraphists caligraffydd calligraphy caligraffeg calling sequence dilyniant galw calling sequences dilyniant galw calliper caliper calliper gauge medrydd caliper calliper gauges medrydd caliper callipers caliper calls galwad callus caleden calm gosteg calms gosteg calorie calori calories calori calorific caloriffig calorific value gwerth caloriffig calorific values gwerth caloriffig calorifier caloriffydd calorifiers caloriffydd calorimeter calorimedr calorimeters calorimedr calorimetric technique techneg galorimetrig calorimetric techniques techneg galorimetrig calorimetry calorimedreg calorizing caloreiddio calving ymrannu (in geomorphology) calypso cân galypso calyx calycs calyx eye needle nodwydd llygad agored calyx eye needles nodwydd llygad agored calyxes calycs cam cam cam follower dilynwr cam cam followers dilynwr cam cam profile proffil cam cam profiles proffil cam camber cambr camber cambro camber arch bwa cambr camber arches bwa cambr cambers cambr cambiata cambiata cambiatas cambiata cambium cambiwm cambium layer haen gambiwm cambium layers haen gambiwm cambiums cambiwm cambric cambrig cambrics cambrig camcorder video clip clip fideo camcordor camcorder video clips clip fideo camcordor camel hair brush brwsh blew camel camel hair brushs brwsh blew camel cameo cameo camera camera camera still images delweddau camera llonydd cameras camera camiknickers nicers cami camisole camisol camisoles camisol camomile camil camomiles camil camouflage cuddliw camouflage cuddliwio camouflages cuddliw camp gwersyll camp stool stôl blygu camp stools stôl blygu campaign ymgyrch campaign ymgyrchu campaigns ymgyrch campanology campanoleg camps gwersyll campus campws camshaft camsiafft camshafts camsiafft canal camlas canalicular camlesynnaidd canalicus camlesyn canals camlas canapés canapés cancel diddymu (in music) cancellation diddymiad (in music) cancellations diddymiad (in music) cancer canser cancer of the bowel canser y coluddyn cancers canser cancrizans cancrizans candid didwyll candidate ymgeisydd candidates ymgeisydd candied peel candi pîl candied peels candi pîl candle cannwyll candle grease gwêr cannwyll candle greases gwêr cannwyll candle-power canhwyllnerth candle-powers canhwyllnerth candles cannwyll candlestick canhwyllbren candlesticks canhwyllbren candlewick pabwyrgotwm candlewicks pabwyrgotwm cane gwialen cane sugar siwgr cansen cane sugars siwgr cansen canes gwialen canework gwaith gwiail caneworker's bodkin botgin gweithiwr gwiail caneworker's bodkins botgin gweithiwr gwiail caneworker's hammer morthwyl gweithiwr gwiail caneworker's hammers morthwyl gweithiwr gwiail caneworker's pliers gefelen gweithiwr gwiail caneworks gwaith gwiail canine tooth dant llygad canine tooths dant llygad canker cancr cankers cancr canned food bwyd tun canned foods bwyd tun cannel coal glo cannwyll cannel coals glo cannwyll cannery canerdy canning canio canning industry diwydiant canio cannon magnel cannon ball pêl fagnel cannon ball service serfiad canon cannon ball services serfiad canon cannon balls pêl fagnel cannons magnel cannula caniwla cannulas caniwla canoe canŵ canoes canŵ canon canon (in music) canon canon (of law) canon canon (of person) canon at the fifth canon yn y pumed canon at the octave canon yn yr wythfed canon at the unison canon unsain canon by augmentation canon drwy estyniad canon by diminution canon drwy gywasgiad canon by inversion canon drwy wrthdro canon law cyfraith eglwysig (in general) canon laws cyfraith eglwysig (in general) canon per arsin et thesin canon per arsin et thesin canon per arsin et thesins canon per arsin et thesin canon recte et retro canon recte et retro canon rectus et inversus canon rectus et inversus canonic imitation dynwarediad canonaidd canonic imitations dynwarediad canonaidd canonical canonaidd canonical form ffurf ganonaidd canonical forms ffurf ganonaidd canonical penalty penyd canonaidd canonize canoneiddio canonry canoniaeth canonry magnelaeth canons canon (in music) canons canon (of law) canons canon (of person) canopy canopi cant goleddu cantata cantata cantatas cantata canteen ffreutur canteen staff staff ffreutur canteens ffreutur canticle cantigl canticles cantigl cantilena cantilena cantilenas cantilena cantilever cantilifer cantilevered beam trawst cantilifer cantilevered beams trawst cantilifer cantilevers cantilifer canting saw llif oleddu canting saws llif oleddu canting table bwrdd goleddu canting tables bwrdd goleddu canton canton cantons canton cantor cantor cantoris cantoris cantors cantor cantus fermus cantus fermus canvas cynfas canvas backing cefn cynfas canvas backings cefn cynfas canvas board bwrdd cynfas canvas boards bwrdd cynfas canvas boot esgid gynfas canvas boots esgid gynfas canvas embroidery brodwaith cynfas canvas grain graen cynfas canvas grains graen cynfas canvas pin pìn cynfas canvas pins pìn cynfas canvas stitch pwyth cynfas canvas stitches pwyth cynfas canvas straining tynhau cynfas canvas stretcher estynnwr cynfas canvas stretchers estynnwr cynfas canvass canfasio canyon canion canyons canion canzona canzona canzonas canzona canzonet canzonetta canzonets canzonetta cap cap (machine screws) cap cell cell gapan cap cells cell gapan cap iron haearn cefn cap irons haearn cefn cap rock capgraig cap rocks capgraig cap sleeve llawes gap cap sleeves llawes gap capability gallu capable galluog capacitance cynhwysiant capacitances cynhwysiant capacitive cynhwysaidd capacitor cynhwysydd (=condenser) capacitor-load cynhwysydd-llwyth capacitor-loads cynhwysydd-llwyth capacitors cynhwysydd (=condenser) capacity cynhwysedd cape clogyn (=cloak) cape penrhyn (=headland) caper capryn (for cooking) capers capryn (for cooking) capes clogyn (=cloak) capes penrhyn (=headland) caphead screw sgriw ben cap caphead screws sgriw ben cap capillarity capilaredd capillary capilari capillary bed gwely capilarïau capillary beds gwely capilarïau capillary network rhwyllen capilarïau capillary networks rhwyllen capilarïau capillary rise codiad capilari capillary rises codiad capilari capillary sphincter sffincter capilari capillary sphincters sffincter capilari capillary tube tiwb capilari capillary tubes tiwb capilari capillary web gwe capilarïau capillary webs gwe capilarïau capital cyfalaf (finance) capital galeri (of Gothic harp) capital pen (of harp) capital prifddinas (city) capital account cyfrif cyfalaf capital accounts cyfrif cyfalaf capital accumulation cronnedd cyfalaf capital accumulations cronnedd cyfalaf capital allowance lwfans cyfalaf capital allowances lwfans cyfalaf capital depreciation dibrisiad cyfalaf capital depreciations dibrisiad cyfalaf capital expenditure gwariant cyfalaf capital expenditures gwariant cyfalaf capital gain enillion cyfalaf capital gains tax treth enillion cyfalaf capital gains taxes treth enillion cyfalaf capital goods nwyddau cyfalaf capital growth twf cyfalaf capital growths twf cyfalaf capital input mewnbwn cyfalaf capital inputs mewnbwn cyfalaf capital intensive cyfalaf-ddwys capital letter priflythyren capital letters priflythyren capital offence trosedd farwol capital offences trosedd farwol capital punishment cosb eithaf capital punishments cosb eithaf capital sum swm cyfalaf capital sums swm cyfalaf capitalism cyfalafiaeth capitalisms cyfalafiaeth capitalist cyfalafol capitalist cyfalafwr capitalist agriculture amaethyddiaeth gyfalafol capitalist agricultures amaethyddiaeth gyfalafol capitalists cyfalafwr capitals cyfalaf (finance) capitals galeri (of Gothic harp) capitals pen (of harp) capitals prifddinas (city) capitate flower fflurben capitate flowers fflurben capitation allowance lwfans y pen capitation allowances lwfans y pen capitation grant grant y pen capitation grants grant y pen capitation tax treth y pen capitation taxes treth y pen capitular cabidylwr capitulars cabidylwr capitulate ildio capon caprwn capons caprwn capotasto branell cappella cappella cappellas cappella capriccio capriccio capsize dymchwel capsize drill dril dymchwel capsize drills dril dymchwel capstone maen capan capstones maen capan capsular capsiwlaidd capsule capsiwl (in botany) capsule cwpan (in physiology) capsules capsiwl (in botany) capsules cwpan (in physiology) captain capten captaincy capteniaeth captains capten caption pennawd captions pennawd capture cipio (in computing) capture dal (a particle) caput capwt caputs capwt car hire llogi car car industry diwydiant ceir caramel caramel caramelization carameleiddio caramels caramel carapace argragen carapaces argragen caravel carafel caravels carafel caraway seed hedyn carwe caraway seeds hedyn carwe carbanion carbanion carbanions carbanion carbide tipped blaen carbid carbohydrate carbohydrad carbohydrates carbohydrad carbon carbon (C) carbon cycle cylchred garbon carbon cycles cylchred garbon carbon dating dyddio carbon carbon dioxide carbon deuocsid carbon dioxides carbon deuocsid carbon monoxide carbon monocsid carbon monoxides carbon monocsid carbon paper papur carbon carbon papers papur carbon carbon racket raced carbon carbon rackets raced carbon carbon steel dur carbon carbon steels dur carbon carbon tetrachloride carbon tetraclorid carbon tetrachlorides carbon tetraclorid carbonate carbonad carbonated carbonedig carbonates carbonad carbonation carbonadu carbonic acid asid carbonig carbonic acids asid carbonig carbonic anhydrase carbonig anhydras carboniferous carbonifferaidd carboniferous limestone calchfaen carbonifferaidd carboniferous limestones calchfaen carbonifferaidd carbonization carboneiddiad carbonizations carboneiddiad carbonize carboneiddio carbons carbon (C) carborundum carborwndwm carborundum stone carreg hogi carborundum stones carreg hogi carborundums carborwndwm carboxyhaemoglobin carbocsihaemoglobin carboxyhaemoglobins carbocsihaemoglobin carboxylation carbocsyleiddiad carboxylations carbocsyleiddiad carboxylic carbocsylig carboxylic acid asid carbocsylig carboxylic acids asid carbocsylig carboxymethyl-cellulose carbocsimethyl-cellwlos (CMC) carboxymethyl-celluloses carbocsimethyl-cellwlos (CMC) carburettor carbwradur carburettors carbwradur carburize carbwreiddio carcass sgerbwd carcass construction adeiladwaith sgerbwd carcass constructions adeiladwaith sgerbwd carcinogen carsinogen carcinogenic carsinogenaidd carcinogens carsinogen card cerdyn card cribo card code cod cerdyn card codes cod cerdyn card column colofn gerdyn card columns colofn gerdyn card cutter torrwr cerdyn card cutters torrwr cerdyn card feed porthydd cardiau card feeds porthydd cardiau card field maes cerdyn card fields maes cerdyn card format fformat cerdyn card formats fformat cerdyn card hopper hopran gardiau card hoppers hopran gardiau card image delwedd cerdyn card images delwedd cerdyn card index mynegai cardiau card indexes mynegai cardiau card jam tagfa gardiau card jams tagfa gardiau card knife cyllell torri cerdyn card knifes cyllell torri cerdyn card loom gwŷdd cerdyn card looms gwŷdd cerdyn card punch tyllwr cardiau card punches tyllwr cardiau card puppet pyped cerdyn card puppets pyped cerdyn card reader darllenydd cardiau card readers darllenydd cardiau card reproducer dyblygydd cardiau card reproducers dyblygydd cardiau card stacker pentyrrwr cardiau card stackers pentyrrwr cardiau card stacking pentyrru cardiau card template patrymlun cerdyn card templates patrymlun cerdyn card verifier gwiriwr cardiau card verifiers gwiriwr cardiau card wreck drylliad cardiau card wrecks drylliad cardiau cardboard cardbord cardboard model model cardbord cardboard models model cardbord cardboard tube tiwb cardbord cardboard tubes tiwb cardbord cardboards cardbord carder cribwr carders cribwr cardiac cardiaidd cardiac arrest ataliad y galon cardiac arrests ataliad y galon cardiac cycle cylchred gardiaidd cardiac cycles cylchred gardiaidd cardiac disease afiechyd y galon cardiac diseases afiechyd y galon cardiac output allbwn y galon cardiac outputs allbwn y galon cardigan cardigan cardigans cardigan cardinal cardinal cardinal number rhif prifol cardinal numbers rhif prifol cardinal point pwynt prifol cardinal points pwynt prifol cardinals cardinal carding brush brwsh ffeil carding brushs brwsh ffeil cardioid cardioid cardioids cardioid cardiologist cardiolegydd cardiologists cardiolegydd cardiology cardioleg cardiopulmonary resuscitation adfywio'r galon a'r ysgyfaint cardiovascular centre canolfannyn cardiofasgwlar cardiovascular centres canolfannyn cardiofasgwlar cardiovascular health iechyd cardiofasgwlar cardiovascular healths iechyd cardiofasgwlar cardiovascular system system gardiofasgwlar cardiovascular systems system gardiofasgwlar cards cerdyn care gofal care and after-care gofal ac ôl-ofal care centre canolfan gofal care centres canolfan gofal care home cartref gofal care homes cartref gofal care label label gofal care labels label gofal care management rheoli gofal care management process proses reoli gofal care manager rheolwr gofal care managers rheolwr gofal care needs anghenion gofal care of the elderly gofal yr henoed care of the environment gofal am yr amgylchedd care order gorchymyn gofal care orders gorchymyn gofal care plan cynllun gofalu care plans cynllun gofalu care practice arferion gofal care staff staff gofal care unit uned gofal care units uned gofal care value gwerthoedd gofal care value base sylfaen gwerthoedd gofal care value bases sylfaen gwerthoedd gofal care value component cydran gwerth gofal care value components cydran gwerth gofal care worker gweithiwr gofal care workers gweithiwr gofal career gyrfa career choice dewis gyrfa career choices dewis gyrfa career guidance arweiniad ar yrfa career guidances arweiniad ar yrfa career objective amcan gyrfaol career objectives amcan gyrfaol career opportunity cyfle gyrfaol career planning cynllunio ar gyfer gyrfa career prospects rhagolygon am yrfa career service gwasanaeth gyrfaoedd career services gwasanaeth gyrfaoedd careers gyrfa careers education addysg gyrfaoedd careers educations addysg gyrfaoedd careers teacher athrawes yrfaoedd (female) careers teacher athro gyrfaoedd (male) careers teachers athrawes yrfaoedd (female) careers teachers athro gyrfaoedd (male) carer gofalwr carers gofalwr cares gofal caret lleolnod caretaker gofalwr caretaker government llywodraeth ofalu caretaker governments llywodraeth ofalu caretakers gofalwr carets lleolnod caricature gwawdlun caricatures gwawdlun caricaturist gwawdlunydd caricaturists gwawdlunydd caries pydredd dannedd carillon carilon (=instrument) carillon clychau (=bells) carillon tôn glychau (=tune) carillons carilon (=instrument) carillons tôn glychau (=tune) caring services gwasanaethau gofal carmine carmin carmines carmin carnauba wax cwyr carnawba carnauba waxes cwyr carnawba carnivore cigysydd carnivores cigysydd carnivorous cigysol carob carob carobs carob carol carol carols carol carotene caroten carotenes caroten carotenoid carotenyn carotenoids carotenyn carotid artery rhydweli garotid carotid body corffyn carotid carp carp carpal carpal carpals carpal carpel carpel carpels carpel carpenter saer coed carpenter's pencil pensil saer carpenter's pencils pensil saer carpenters saer coed carpentry gwaith saer carpentry and joinery gwaith saer ac asiedydd carpet carped carpet sweeper ysgubwr carpedi carpet sweepers ysgubwr carpedi carpet underlay isgarped carpets carped carpogonium carpogoniwm carpogoniums carpogoniwm carps carp carr ffen carrack carac carracks carac carriage cludiant (=transport) carriage cludydd (=lathe part) carriage bolt bollt wagen carriage bolts bollt wagen carriage return dychwelydd carriage returns dychwelydd carriages cludiant (=transport) carriages cludydd (=lathe part) carriageway ffordd gerbydau carrier cariwr (lathe dog) carrier cludydd (in general) carrier language iaith gyfarwyddyd carrier languages iaith gyfarwyddyd carrier molecule moleciwl cludo carrier molecules moleciwl cludo carrier pulse train curiadau'r don gario carrier wave ton gario carrier waves ton gario carriers cariwr (lathe dog) carriers cludydd (in general) carrot moronen carrots moronen carrs ffen carry car-rif carry cario carry bit did cario carry bits did cario carry flag lluman cario carry flags lluman cario carry out cynnal (an experiment) carry out a fair test cynnal prawf teg carry prediction circuit cylched ragfynegi car-rif carry prediction circuits cylched ragfynegi car-rif carry the baton cario'r batwn carrycot caricot carrycot stand stand caricot carrycot stands stand caricot carrycots caricot carrying capacity cynhwysedd cludo carrying figure ffigur i'w gario carrying figures ffigur i'w gario carrying service gwasanaeth cludo carrying services gwasanaeth cludo cartel cartel cartelize carteleiddio cartels cartel cartilage cartilag cartilages cartilag cartilaginous cartilagaidd cartilaginous fish pysgodyn cartilagaidd cartilaginous fishs pysgodyn cartilagaidd cartographic cartograffig cartographic information gwybodaeth gartograffig cartographic informations gwybodaeth gartograffig cartographic material deunydd cartograffig cartographic materials deunydd cartograffig cartography cartograffeg carton carton cartons carton cartoon cartŵn cartoons cartŵn cartridge cetrisen cartridge brass pres cetris cartridge disk disg cetrisen cartridge disks disg cetrisen cartridge paper papur cetris cartridge papers papur cetris cartridges cetrisen cartulary cartwlari cartwheel olwyn dro (in athletics) cartwheel olwyndroi cartwheels olwyn dro (in athletics) carucate carwgad carucates carwgad caruncle carwngl caruncles carwngl carve cerfio carved cerfiedig carved head pen cerfiedig carved heads pen cerfiedig carver cerfiwr (of person) carver cyllell gerfio (=carving knife) carvers cerfiwr (of person) carvers cyllell gerfio (=carving knife) carving cerfiad carving chisel cŷn cerfio carving chisels cŷn cerfio carving mallet gordd gerfio carving mallets gordd gerfio carvings cerfiad caryatid caryatid caryatids caryatid cascade rhaeadr cascade rhaeadru cascaded rhaeadrol cascades rhaeadr case achos (in general) case cas (for carrying) case conference cynhadledd achos case conferences cynhadledd achos case hardened wedi'i grofennu case hardening crofennu case history hanes achos case law cyfraith achosion case laws cyfraith achosion case load baich achosion case loads baich achosion case record cofnod achos case records cofnod achos case study astudiaeth achos casein casein casein colour lliw casein casein colours lliw casein casein glue glud casein casein glues glud casein caseinogen caseinogen caseinogens caseinogen caseins casein casement fastener ffasnydd ffenestr adeiniog casement fasteners ffasnydd ffenestr adeiniog casement window ffenestr adeiniog casement windows ffenestr adeiniog cases achos (in general) cases cas (for carrying) cash arian parod cash allocation dyraniad arian cash allocations dyraniad arian cash and carry shop siop talu a chludo cash and carry shops siop talu a chludo cash book dyddlyfr arian cash books dyddlyfr arian cash dispenser peiriant arian cash dispensers peiriant arian cash flow llif arian cash flow forecast rhagolwg llif arian cash flow forecasts rhagolwg llif arian cash flows llif arian cash limit cyfyngiad arian cash limited budget cyllideb arian cyfyngedig cash limited budgets cyllideb arian cyfyngedig cash limits cyfyngiad arian cash machine peiriant arian parod cash machines peiriant arian parod cash payment taliad arian parod cash payments taliad arian parod cash value gwerth ariannol cash values gwerth ariannol cashless society cymdeithas heb arian parod cashs arian parod casing casin casings casin casket blwch gemau (for jewellery) caskets blwch gemau (for jewellery) cassava casafa cassavas casafa casserole caserol casseroles caserol cassette casét cassette player chwaraeydd casét cassette players chwaraeydd casét cassette recorder recordydd casét cassette recorders recordydd casét cassettes casét cassiterite casiterit cassiterites casiterit cassock casog cassocks casog cast bwrw cast camdroi (out of shape) cast iron haearn bwrw cast iron vice feis haearn bwrw cast iron vices feis haearn bwrw cast irons haearn bwrw cast off cau pwythau (in knitting) cast on ystofi pwythau (in knitting) cast out troi allan cast steel dur bwrw cast steels dur bwrw castanet castanét castanets castanét caste cast caste system cyfundrefn gast caste systems cyfundrefn gast castellan castellydd castellans castellydd castellated castellaidd (=castle-like) castellated castellog (=having battlements) castellated prop ateg gastellaidd castellated props ateg gastellaidd castellation castelliad castellations castelliad caster sugar siwgr mân caster sugars siwgr mân castes cast casting castin casting castio casting apparatus cyfarpar castio casting down castio i lawr casting plaster castin plastr casting plasters castin plastr casting up castio i fyny casting vote pleidlais fwrw casting votes pleidlais fwrw castings castin castle castell castle nut nyten gastell castle nuts nyten gastell castleguard gwarchodaeth castell castleguards gwarchodaeth castell castles castell castor castor castors castor casual employment gwaith ysbeidiol casual employments gwaith ysbeidiol casual labour llafur ysbeidiol casual labours llafur ysbeidiol casual unemployment diweithdra ysbeidiol casual unemployments diweithdra ysbeidiol casual water dŵr achlysurol casual waters dŵr achlysurol casuals dillad segura casualty anafedig (=injured person) casualty damwain (=accident) casuistry twyllresymeg cat-o'-nine-tails fflangell catabatic catabatig catabolic catabolig catabolism catabolaeth catabolisms catabolaeth catabolite catabolyn catabolites catabolyn catalase catalas catalases catalas catalogue catalog catalogue catalogio catalogue number rhif yn y catalog catalogue numbers rhif yn y catalog catalogues catalog catalyse catalyddu catalysis catalysis catalyst catalydd catalysts catalydd catalytic catalytig catalytic hydrogenation hydrogeniad catalytig catalytic hydrogenations hydrogeniad catalytig cataract cataract cataracts cataract catastrophism trychinebedd catastrophisms trychinebedd catastrophizing trychinebu catch clicied (of door) catch dal catch daliad (of ball etc) catch a crab cranca catch crop byrgnwd catch crops byrgnwd catch plate plât cydio catch plates plât cydio catch stitch pwyth cydio catch stitched hem hem pwyth cudd catch stitched hems hem pwyth cudd catch stitches pwyth cydio catch weights pwysau agored catcher daliwr catchers daliwr catches clicied (of door) catches daliad (of ball etc) catchment dalgylch catchment area dalgylch catchment areas dalgylch catchments dalgylch catchy gafaelgar catechism catecism (in general) catechism holwyddoreg (in Welsh Nonconformity) catechisms catecism (in general) catechisms holwyddoreg (in Welsh Nonconformity) catecholamine catecolamin catecholamines catecolamin categorize categoreiddio catena catena catenary catena catenas catena catenate cadwyno catenation cadwynedd catenations cadwynedd catenoid catenoid catenoids catenoid cater arlwyo (food) cater darparu (=provide) caterer arlwywr caterers arlwywr catering arlwyo catering and hotel trade masnach arlwyo a gwestya catering and hotel trades masnach arlwyo a gwestya caterpillar lindysyn caterpillars lindysyn catgut coludd catguts coludd cathartic carthydd cathartics carthydd cathedral eglwys gadeiriol cathedral close clos eglwys gadeiriol cathedral closes clos eglwys gadeiriol cathedrals eglwys gadeiriol catheter cathetr catheters cathetr cathode catod cathode ray pelydryn catod cathodes catod cathodic catodig catholic catholig (=universal) catholic pabyddol (of Roman Catholic Church) catholic mass offeren Babyddol cation catïon cation exchange column colofn cyfnewid catïonau cation exchange columns colofn cyfnewid catïonau cationic cationig cations catïon catkin cynffon oen bach (hazel) catkins cynffon oen bach (hazel) catspring naid cath catsprings naid cath cattle cake cêc gwartheg cattle cakes cêc gwartheg cattle range maestir gwartheg cattle ranges maestir gwartheg caudal cynffonnol caudal vertebra fertebra cynffonnol caudal vertebras fertebra cynffonnol caught out allan drwy ddal (in cricket) caul gwasgblat caul veneering argaenu gwasgblat cauldron pair cauldrons pair cauliflower blodfresychen cauliflower cheese blodfresych caws cauliflowers blodfresychen caulk calcio caulking strip stribed calcio caulking strips stribed calcio caulking tool erfyn calcio caulking tools erfyn calcio cauls gwasgblat causal achosol causal phase cyfnod achosol causal phases cyfnod achosol causal relationship perthynas achosol causal relationships perthynas achosol causalgia llosgwayw causalgias llosgwayw causation achosiaeth (=causality) causations achosiaeth (=causality) causative factor ffactor achosol causative factors ffactor achosol cause achosi cause of pollution achos llygredd causes of ill health achosion afiechyd causeway sarn causeway camp gwersyll sarnau causeway camps gwersyll sarnau caustic curve cromlin gawstig caustic curves cromlin gawstig caustic soda soda brwd caustic sodas soda brwd caution gofal (=care) caution rhybudd (=warning) cautions gofal (=care) cautions rhybudd (=warning) cavalier cafaliraidd cavalier cafalîr cavaliers cafalîr cavalry gwŷr meirch cavalry twill cafalri caerog cavalry twills cafalri caerog cavatina cafatina cavatinas cafatina cave ogof cave dwelling ogof-annedd cave dwellings ogof-annedd cave painting paentiad ogof cave paintings paentiad ogof cavern ceudwll cavernous ceudyllog caverns ceudwll caves ogof cavetto moulding mowldin cafeto cavetto mouldings mowldin cafeto cavetto panel panel cafeto cavetto panels panel cafeto caviare cafiar caviares cafiar cavity ceudod cavity wall wal geudod cavity walls wal geudod cay cai cayenne cayenne cayennes cayenne cedar cedrwydden cedar oil olew cedrwydden cedar oils olew cedrwydden cedars cedrwydden cedarwood pencil pensil pren cedrwydd cedarwood pencils pensil pren cedrwydd cede ildio ceiling nenfwd ceiling joist trawst nenfwd ceiling joists trawst nenfwd ceiling rack rhesel nenfwd ceiling racks rhesel nenfwd ceilings nenfwd cejuela cejuela cejuelas cejuela celadon seladon (green colour) celadons seladon (green colour) celebrate dathlu celebration dathliad celebrations dathliad celery seleri celesta selesta celestas selesta celestial wybrennol celestial equator cyhydedd wybrennol celestial equators cyhydedd wybrennol celestial sphere sffêr wybrennol celestial spheres sffêr wybrennol celibacy ymgadw'n ddibriod cell cell cell body cellgorff cell division cellraniad cell divisions cellraniad cell membrane cellbilen cell membranes cellbilen cell plate cellblat cell plates cellblat cell pore celldwll cell pores celldwll cell production cynhyrchu celloedd cell sap cellnodd cell saps cellnodd cell surface arwyneb y gell cell surfaces arwyneb y gell cell wall cellfur cell walls cellfur cell-free di-gell cellarer selerwr cellarers selerwr cellarium seler cellariums seler cellist sielydd cellists sielydd cello sielo cellophane seloffan cellophanes seloffan cells cell cellular cellog cellular adhesive gludydd cellog cellular adhesives gludydd cellog cellular respiration resbiradaeth gellog cellular respirations resbiradaeth gellog cellular structure adeiledd cellog cellular structures adeiledd cellog celluloid cellwloid celluloids cellwloid cellulose cellwlos cellulose finish gorffeniad cellwlos cellulose finishs gorffeniad cellwlos cellulose lacquer lacr cellwlos cellulose lacquers lacr cellwlos cellulose paste past cellwlos cellulose paste powder powdr past cellwlos cellulose paste powders powdr past cellwlos cellulose pastes past cellwlos celluloses cellwlos cellulosics cellwlosigion cembalo cembalo cement sment cement smentio cementation smentiad cementation of sediments smentiad gwaddodion cementations smentiad cemented carbide sment carbid cemented carbides sment carbid cementite smentit cementites smentit cements sment censer thuser (in church) censers thuser (in church) censor sensor censors sensor censorship sensoriaeth censorships sensoriaeth censure cerydd censures cerydd census cyfrifiad census data data cyfrifiad census return ffurflen gyfrifiad census returns ffurflen gyfrifiad centenary canmlwyddiant centigrade canradd centile canradd centile chart siart canraddau centile charts siart canraddau centile rank safle canrannol centile ranks safle canrannol centiles canradd centilitre centilitr centilitres centilitr centimetre centimetr (cm) centimetres centimetr (cm) central agitator cynhyrfydd canolog central agitators cynhyrfydd canolog central bank banc canolog central banks banc canolog central business district canol busnes y dref (C.B.D.) central business districts canol busnes y dref (C.B.D.) central canal tiwb canolog central canals tiwb canolog central care area ardal gofalon canolog central care areas ardal gofalon canolog central column colofn ganolog central columns colofn ganolog central core craidd canolog central cores craidd canolog central government llywodraeth ganolog central governments llywodraeth ganolog central heating gwres canolog central heatings gwres canolog central nervous system prif system nerfol central nervous systems prif system nerfol central perspective persbectif canolog central perspectives persbectif canolog central processing unit uned brosesu ganolog (CPU) central processing units uned brosesu ganolog (CPU) central processor prosesydd canolog central processors prosesydd canolog central venous pressure pwysedd gwythiennol canolog central venous pressures pwysedd gwythiennol canolog centrality canolrwydd centralization canoli centralize canoli centralized canoledig centre canol (=middle point) centre canolbwynt (of attention etc) centre canolfan (=place or group of buildings) centre canolfannyn (brain) centre canoli centre canolwr (person in sport) centre back canol cefn centre backs canol cefn centre bar bar canol (lettering) centre bars bar canol (lettering) centre bit ebill canoli centre bits ebill canoli centre cane gwialen ganol centre canes gwialen ganol centre circle cylch canol centre circles cylch canol centre coordinator cydlynydd canolfan centre coordinators cydlynydd canolfan centre dotting canolfarcio centre drill dril canoli (slocombe) centre drills dril canoli (slocombe) centre front canol blaen centre fronts canol blaen centre hinge colfach canol centre hinges colfach canol centre lathe turn canol centre lathes turn canol centre line llinell ganol centre lines llinell ganol centre of balance ffwlcrwm centre of curvature craidd crymedd centre of excellence canolfan rhagoriaeth centre of gravity craidd disgyrchiant centre of mass craidd màs centre of percussion craidd taro centre of pressure canolbwynt gwasgedd centre of rotation canol cylchdro centre of similitude pwynt cyfluniant centre of symmetry canol cymesuredd centre of the court canol y cwrt centre outfielder maeswr canol centre outfielders maeswr canol centre pass pàs gyntaf centre point canolbwynt centre points canolbwynt centre popping canolbopio centre punch pwnsh canoli centre punches pwnsh canoli centre punching canolbwnsio centre serving line llinell serfio ganol centre serving lines llinell serfio ganol centre spot marc canol centre spots marc canol centre square sgwâr canoli centre squares sgwâr canoli centre the ball canoli'r bêl centre-face atom atom canol-yr-wyneb centre-face atoms atom canol-yr-wyneb centre-half canolwr centre-halfs canolwr centreboard bwrdd canol centreboards bwrdd canol centred canolog centres canol (=middle point) centres canolbwynt (of attention etc) centres canolfan (=place or group of buildings) centres canolfannyn (brain) centres canolwr (person in sport) centrifugal allgyrchol centrifugal casting castio allgyrchol centrifugal force grym allgyrchol centrifugal forces grym allgyrchol centrifuge allgyrchu centrifuge allgyrchydd centrifuges allgyrchydd centring canoli centriole centriol centrioles centriol centripetal mewngyrchol centripetal force grym mewngyrchol centripetal forces grym mewngyrchol centroid craidd centroids craidd centromere centromer centromeres centromer centrosome centrosom centrosomes centrosom century canrif century centuria (=unit of soldiers) cephalic ceffalig cephalic index indecs ceffalig cephalic indexes indecs ceffalig cephalisation ceffaleiddiad cephalisations ceffaleiddiad cephalo- ceffalo- ceramic ceramig ceramic stilts stiltiau ceramig ceramic tile teilsen geramig ceramic tiles teilsen geramig ceramics cerameg cerdd dant cerdd dant cerdd dant arrangement trefniant cerdd dant cerdd dant arrangements trefniant cerdd dant cerdd dants cerdd dant cereal grawnfwyd cereals grawnfwyd cerebellum cerebelwm cerebellum ymennydd bach cerebellums cerebelwm cerebellums ymennydd bach cerebral cerebrol cerebral ymenyddol cerebral cortex cortecs cerebrol cerebral cortexes cortecs cerebrol cerebral haemorrhage gwaedlif ar yr ymennydd cerebral haemorrhages gwaedlif ar yr ymennydd cerebral hemisphere hemisffer cerebrol cerebral hemispheres hemisffer cerebrol cerebral palsy parlys yr ymennydd cerebrospinal cerebrosbinol cerebrospinal fluid hylif yr ymennydd cerebrospinal fluids hylif yr ymennydd cerebrovascular accident damwain gerebrofasgwlar cerebrovascular accidents damwain gerebrofasgwlar cerebrum cerebrwm cerebrums cerebrwm ceremony seremoni cerise ceirios cerises ceirios cerium ceriwm (Ce) ceriums ceriwm (Ce) certain sicr certificate tystysgrif certificates tystysgrif certification ardystio (in general) certification rhoi tystysgrif (of film) certified seed had ardyst certified seeds had ardyst certify ardystio cerulean blue glas y nen cerulean blues glas y nen cervical cerfigol cervical smear prawf gwddf y groth cervical smears prawf gwddf y groth cervical vertebra fertebra gyddfol cervical vertebras fertebra gyddfol cervix gwddf y groth (=neck of womb) cervixes gwddf y groth (=neck of womb) cesspool carthbwll cesspools carthbwll chaconne chaconne chaconnes chaconne chaetae caetae chafe rhathu chafing rhathiad chafings rhathiad chain cadwyn chain cadwyno chain drilling drilio cadwynol chain drive gyriant cadwyn chain drives gyriant cadwyn chain line llinell gadwyn chain lines llinell gadwyn chain link dolen gadwyn chain links dolen gadwyn chain mechanism mecanwaith cyswllt chain mechanisms mecanwaith cyswllt chain molecules moleciwlau cadwynol chain of command cadwyn awdurdod chain of production cadwyn gynhyrchu chain printer argraffydd cadwyn chain printers argraffydd cadwyn chain reaction adwaith cadwynol chain reactions adwaith cadwynol chain reflex atgyrch cadwynol chain reflexes atgyrch cadwynol chain riveting rhybedu cadwynol chain rule rheol cadwyn chain rules rheol cadwyn chain stitch pwyth cadwyn chain stitches pwyth cadwyn chain store siop gadwyn chain stores siop gadwyn chain survey tirfesur cadwyn chain wrench tyndro cadwyn chain wrenches tyndro cadwyn chained cadwynog chained feather stitch pwyth plu cadwynog chained feather stitches pwyth plu cadwynog chains cadwyn chair cadair chair back gorchudd cefn cadair chair backs gorchudd cefn cadair chair lift cadair godi chair lifts cadair godi chairbound pupil disgybl sy'n gaeth i'w gadair chairbound pupils disgybl sy'n gaeth i'w gadair chairman designate darpar gadeirydd chairman designates darpar gadeirydd chairs cadair chalaza calasa chalazas calasa chalcopyrite calcopyrit chalcopyrites calcopyrit chalet chalet chalets chalet chalice caregl chalices caregl chalk sialc chalk sialcio chalk drawing llun sialc chalk drawings llun sialc chalks sialc challenge her challenge herio challenger heriwr challengers heriwr challenges her challenging behaviour ymddygiad heriol challenging behaviours ymddygiad heriol chalumeau chalumeau chalumeaus chalumeau chamber agor (in quarry) chamber siambr (in general) chamber music cerddoriaeth siambr chamber musics cerddoriaeth siambr chamber of trade cymdeithas fasnach chamber tomb beddrod siambr chamber tombs beddrod siambr chamberlain siambrlen chamberlains siambrlen chambers agor (in quarry) chambers siambr (in general) chamfer siamffer chamfer siamffro chamfered siamffrog chamfered neck gwddf siamffrog chamfered necks gwddf siamffrog chamfers siamffer chamois siami chamois glove maneg siami chamois gloves maneg siami chamois leather lledr siami chamois leathers lledr siami champion pencampwr (male and general) champion pencampwraig (female) champion land tir agored champion lands tir agored champions pencampwr (male and general) champions pencampwraig (female) championship pencampwriaeth championships pencampwriaeth champlevé champlevé champlevés champlevé chance siawns chancel cangell chancel arch bwa cangell chancel arches bwa cangell chancellor canghellor chancellors canghellor chancels cangell chances siawns chandelier canhwyllyr chandeliers canhwyllyr chandler siandler chandlers siandler change newid change direction newid cyfeiriad change of engagement newid cyweddiad change of pace newid cyflymdra change one factor newid un ffactor change wheel olwyn newid change wheels olwyn newid changes newid changing face of the family wyneb newidiol y teulu changing notes nodau cyfnewid changing voice llais yn newid changing voices llais yn newid channel sianel channel sianelu channel efficiency effeithlonrwydd sianel channels sianel chanson chanson chansons chanson chant côr-gân (of canticle) chant llafarganu (formally) chant salm-dôn (of psalm) chant siant (=spoken singsong phrase) chant siantio (informally) chanting rhythmically llafarganu'n rhythmig chantry siantri chantry priest offeiriad siantri chantry priests offeiriad siantri chants côr-gân (of canticle) chants salm-dôn (of psalm) chants siant (=spoken singsong phrase) chaos anhrefn chaotic sky awyr afluniaidd chaparral mangoed chaparrals mangoed chapel capel chapel of ease capel anwes chapel without tower or spire capel heb dŵr na meindwr chapel without tower or spires capel heb dŵr na meindwr chapelry capeliaeth chapels capel chaplain caplan chaplaincy caplaniaeth chaplains caplan chaplet coronbleth chaplets coronbleth chapter cabidwl (=canons of a cathedral) chapter pennod (=division of a book) chapterhouse cabidyldy chapterhouses cabidyldy chapters cabidwl (=canons of a cathedral) chapters pennod (=division of a book) char torgoch character cymeriad (of person) character nod (=symbol) character nodwedd (of biological species etc) character code cod nodau character codes cod nodau character font ffont nodau character fonts ffont nodau character motivation and action cymhelliad a gweithred cymeriad character of a puppet cymeriad pyped character of vegetation nodwedd llystyfiant character recognition adnabod nodau character reference geirda cymeriad character references geirda cymeriad character set set nodau character sets set nodau character string llinyn nodau character strings llinyn nodau characteristic nodwedd (in general) characteristic nodweddiadol characteristic nodweddrif (logarithms) characteristic curve cromlin nodweddiadol characteristic curves cromlin nodweddiadol characteristic feature arwedd nodweddiadol characteristic features arwedd nodweddiadol characteristic note nodyn nodweddiadol characteristic notes nodyn nodweddiadol characteristics nodwedd (in general) characteristics nodweddrif (logarithms) characterization cymeriadaeth characterizations cymeriadaeth characters cymeriad (of person) characters nod (=symbol) characters nodwedd (of biological species etc) characters per second nodau yr eiliad (cps) charcoal siarcol charcoal drawing llun siarcol charcoal drawings llun siarcol charcoal pencil pensil siarcol charcoal pencils pensil siarcol charcoals siarcol charge codi tâl (money) charge cost (money) charge gwefr (electrical) charge gwefru (electrical) charge hyrddiad (in sport) charge hyrddio (in sport) charge llwytho (furnace or crucible) charge density meter mesurydd dwysedd gwefr charge density meters mesurydd dwysedd gwefr charge nurse prif weinydd nyrsio (=male sister) charge nurse prif weinyddes nyrsio (female) charge nurses prif weinydd nyrsio (=male sister) charge nurses prif weinyddes nyrsio (female) charged wedi'i gwefru (electrical, with feminine nouns) charged wedi'i wefru (electrical, with masculine nouns) charged condenser cynhwysydd wedi'i wefru charged condensers cynhwysydd wedi'i wefru charged particle gronyn wedi'i wefru charged particles gronyn wedi'i wefru charges cost (money) charges gwefr (electrical) charges hyrddiad (in sport) charging policy polisi codi tâl chariot cerbyd rhyfel chariot wheel pattern patrwm olwyn cerbyd chariot wheel patterns patrwm olwyn cerbyd chariots cerbyd rhyfel charismatic carismataidd charity elusen charity education addysg elusennol charity educations addysg elusennol charity school ysgol elusennol charity schools ysgol elusennol chars torgoch chart siart charter siarter charter of enfranchisement siarter rhyddfreinio charters siarter chartism siartaeth chartisms siartaeth chartist siartydd chartists siartydd charts siart chase helfa chase ymlid chaser siaswr chasers siaswr chases helfa chasing siasin chasing siasio chasing hammer morthwyl siasio chasing hammers morthwyl siasio chasings siasin chasm agendor chasms agendor chassis siasi chassis frame ffrâm siasi chassis frames ffrâm siasi chastity diweirdeb chasuble casul chasubles casul chatter sgrytiad chatter sgrytian chattermark rhewgraith chattermarks rhewgraith chatters sgrytiad chaudfroid chaudfroid chauvinism siofiniaeth chauvinisms siofiniaeth check gwiriad (=verification) check gwirio (=verify) check hollt (=split / defect in wood) check prawf (=test) check profi (=test) check siec (of pattern) check all gwirio oll check digit gwirio digid check digits gwirio digid check nut nyten gloi (lock nut) check nuts nyten gloi (lock nut) check pattern patrwm siec check patterns patrwm siec check pointer pwyntydd stac check pointers pwyntydd stac check selection gwirio dewisiad check-up archwiliad (medical) check-ups archwiliad (medical) checked material defnydd siec checked materials defnydd siec checklist rhestr gyfeirio (for reference) checklists rhestr gyfeirio (for reference) checkout desg talu checkouts desg talu checks gwiriad (=verification) checks hollt (=split / defect in wood) checks prawf (=test) checksum prawfswm checksums prawfswm cheek boch cheeks boch cheese caws cheese curd ceuled caws cheese curds ceuled caws cheese straws rhimynnau caws cheese-head bolt bollt bencosyn cheese-head bolts bollt bencosyn cheese-head rivet rhybed pencosyn cheese-head rivets rhybed pencosyn cheese-head screw sgriw bencosyn cheese-head screws sgriw bencosyn cheeseboard bwrdd caws cheeseboards bwrdd caws cheeseburger eidionyn caws cheeseburgers eidionyn caws cheesecake cacen gaws cheesecakes cacen gaws cheesecloth lliain caws cheesecloths lliain caws cheeses caws chef-d'oeuvre campwaith (masterpiece) chef-d'oeuvres campwaith (masterpiece) chelate celadu chelated celedig chelation celadiad chelations celadiad chemical cemegol chemical cemegyn chemical action effaith gemegol chemical actions effaith gemegol chemical behaviour ymddygiad cemegol chemical behaviours ymddygiad cemegol chemical industry diwydiant cemegion chemical kinetics cineteg gemegol chemical reaction adwaith cemegol chemical reactions adwaith cemegol chemical shift symudiad cemegol chemical shifts symudiad cemegol chemical stain staen cemegol chemical stains staen cemegol chemical structure adeiledd cemegol chemical structures adeiledd cemegol chemical symbol symbol cemegol chemical symbols symbol cemegol chemical weed killer chwynladdwr cemegol chemical weed killers chwynladdwr cemegol chemicals cemegyn chemisorption cemsugniad chemisorptions cemsugniad chemist cemegydd (=expert in chemistry) chemistry cemeg chemistry of food cemeg bwyd chemists cemegydd (=expert in chemistry) chemoreceptor cemodderbynnydd chemoreceptors cemodderbynnydd chemosensory cemosynhwyraidd chemosynthesis cemosynthesis chemotaxis cemotacsis chemotherapy cemotherapi chemotropism cemotropedd chemotropisms cemotropedd chenille needle nodwydd chenille chenille needles nodwydd chenille cheque siec chequer plate plât siecer chequer plates plât siecer chequered chain stitch pwyth cadwyn amryliw chequered chain stitches pwyth cadwyn amryliw cheques siec cherry ceiriosen chert cornfaen cherts cornfaen chessmen gwerin gwyddbwyll chest brest (of human) chest cist (for storing things) chest compression cywasgu'r frest chest freezer rhewgist chest freezers rhewgist chest medicine meddygaeth y frest chest medicines meddygaeth y frest chest of drawers cist o ddroriau chest of viols cist o feiolau chest pass pàs o'r frest chest register llais y frest chest registers llais y frest chestnut cneuen gastan chestnut brown cochddu (of soil) chestnut brown gwinau (enamelling colour) chestnut browns gwinau (enamelling colour) chestnuts cneuen gastan chests brest (of human) chests cist (for storing things) chevron cwplws (architecture) chevron banding bandin ceibr chevron bandings bandin ceibr chevron stitch pwyth ceibr chevron stitches pwyth ceibr chevrons cwplws (architecture) chiaroscuro chiaroscuro chiasma ciasma chiasmas ciasma chicanery twyll chicken cyw iâr chicken-pox brech yr ieir chicken-poxes brech yr ieir chickens cyw iâr chicory sicori chief education officer prif swyddog addysg chief education officers prif swyddog addysg chief executive officer prif weithredwr chief executive officers prif weithredwr chief superintendent prif arolygydd chief superintendents prif arolygydd chief-rent rhent arglwydd chief-rents rhent arglwydd chieftain pennaeth chieftains pennaeth chiffon shiffon chiffons shiffon child plentyn child abuse cam-drin plant child abuse register cofrestr plant a gamdriniwyd child abuse registers cofrestr plant a gamdriniwyd child allowance budd-dal plant child allowances budd-dal plant child assessment order gorchymyn asesu plentyn child assessment orders gorchymyn asesu plentyn child at risk plentyn mewn perygl child care gofal plant child care assistant cynorthwyydd gofal plant child care assistants cynorthwyydd gofal plant child care officer swyddog gofal plant child care officers swyddog gofal plant child care worker gweithiwr gofal plant child care workers gweithiwr gofal plant child cares gofal plant child development datblygiad plant child developments datblygiad plant child guidance cyfarwyddo plant child guidance centre canolfan cyfarwyddo plant child guidance centres canolfan cyfarwyddo plant child guidance clinic clinig cyfarwyddo plant child guidance clinics clinig cyfarwyddo plant child having special educational needs plentyn ag anghenion addysgol arbennig child in need plentyn mewn angen child minder gwarchodwr plant child minders gwarchodwr plant child protection diogelu plant child protection register cofrestr amddiffyn plant child protection registers cofrestr amddiffyn plant child psychiatrist seiciatrydd plant child psychiatrists seiciatrydd plant child psychiatry seiciatreg plant child psychology seicoleg plant child welfare lles plant child welfare clinic clinig lles plant child welfare clinics clinig lles plant child welfares lles plant child-centred approach dull plentyn ganolog child-centred approaches dull plentyn ganolog child-centred education addysg plant ganolog child-centred educations addysg plant ganolog child-centred teaching addysgu plant ganolog childbirth genedigaeth childbirths genedigaeth childhood plentyndod childhoods plentyndod childish plentynnaidd children's home cartref plant children's homes cartref plant children's literature llenyddiaeth plant children's literatures llenyddiaeth plant childs plentyn chill oeri chill bar bar rhynnu chill bars bar rhynnu chilli chilli chilling compartment adran oeri chilling compartments adran oeri chillis chilli chime clychsain chime bar bar cloch chime bars bar cloch chimes clychsain chimney simnai chin gên chin rest gên-bwys chin rests gên-bwys china tsieni china cabinet cabinet llestri china cabinets cabinet llestri china clay caolin china palette palet tsieni china palettes palet tsieni china ware llestri tsieni chinas tsieni chins gên chintz chintz chintzes chintz chip sglodi (in general) chip sglodyn (in general) chip tsip (in football) chip tsipio (in football) chip breaker torrwr sglodion chip breakers torrwr sglodion chip the ball tsipio'r bêl chipboard bwrdd sglodion chipboards bwrdd sglodion chipped tolciog (of surface) chipped grain graen sglodion chipped grains graen sglodion chipped potatoes sglodion chipping block bloc sglodi chipping blocks bloc sglodi chipping chisel cŷn sglodi chipping chisels cŷn sglodi chipping face wyneb sglodi chipping faces wyneb sglodi chipping hammer morthwyl sglodi chipping hammers morthwyl sglodi chipping resistance gwrthiant sglodi chipping resistances gwrthiant sglodi chips sglodyn (in general) chips tsip (in football) chiral cirol chirality ciroledd chiropodist ciropodydd chiropodists ciropodydd chiropody trin traed chisel cŷn chisel naddu chisel blade llafn cŷn chisel blades llafn cŷn chisel edge ymyl cŷn chisel edges ymyl cŷn chisel parts rhannau cŷn chisel shaped arrowhead pen saeth ffurf cŷn chisel shaped arrowheads pen saeth ffurf cŷn chisels cŷn chitin citin chitins citin chivalry sifalri chivalry order urdd sifalri chivalry orders urdd sifalri chives cennin syfi chlamydospore clamydosbor chlamydospores clamydosbor chloride clorid chloride ion ïon clorid chloride ions ïon clorid chloride shift symudiad clorid chloride shifts symudiad clorid chlorides clorid chlorinate clorineiddio chlorinated clorinedig chlorine clorin (Cl) chlorines clorin (Cl) chloroethane cloroethan chloroethanes cloroethan chloroform clorofform chloroforms clorofform chloromethane cloromethan chloromethanes cloromethan chlorophyll cloroffyl chlorophylls cloroffyl chloroplast cloroplast chloroplasts cloroplast chloropropane cloropropan chloropropanes cloropropan chlorosis clorosis (in botany) chlorosis gwyrddwst (medical) chockstone tagen chockstones tagen chocolate siocled chocolates siocled choice dewis choice chamber siambr ddewis choice chambers siambr ddewis choices dewis choir côr choir boy bachgen côr choir organ organ gôr choir organs organ gôr choir stall sedd gôr choir stalls sedd gôr choir-monk côr-fynach choir-monks côr-fynach choirs côr choke tagu choke tagydd chokes tagydd cholecalciferol colecalchifferol cholecalciferols colecalchifferol cholecystokinin colesystocinin cholecystokinins colesystocinin cholera colera cholera epidemic epidemig colera cholera epidemics epidemig colera choleras colera cholesterol colesterol cholesterols colesterol cholic acid asid colig cholic acids asid colig cholinergic colinergig cholinesterase colinesteras cholinesterases colinesteras cholosterolaemia colosterolaemia cholosterolaemias colosterolaemia chondral condrol chondroid condroid chondroitin condroitin chondroitins condroitin chop cildoriad (in tennis) chop cildorri (in tennis) chop golwyth (of meat) chop torri (mortise) chopper bwyell gig (meat) chopper grip gafael bwyell chopper grips gafael bwyell choppers bwyell gig (meat) chopping board bwrdd torri chopping boards bwrdd torri chops cildoriad (in tennis) chops golwyth (of meat) chorale corâl chorale prelude preliwd corâl chorale preludes preliwd corâl chorales corâl chord cord chord cordio chord figuring rhifoli cord chord in first inversion cord gwrthdro cyntaf chord in root position cord safle gwreiddiol chord in second inversion cord ail wrthdro chord in third inversion cord trydydd gwrthdro chord indication dynodi cord chord of the seventh cord seithfed chord progression dilyniad cordiau chord progressions dilyniad cordiau chord sequence dilyniant o gordiau chord sequences dilyniant o gordiau chordal block bloc cordiau chordal blocks bloc cordiau chordal structure adeiledd cordiol chordal structures adeiledd cordiol chordate cordat chordates cordat chords cord choreographer coreograffydd choreographers coreograffydd choreography coreograffi chorion corion chorions corion chorister aelod o gôr choristers aelod o gôr choroid coroid choroid layer haenen goroid choroid layers haenen goroid choroid plexus plecsws coroid choropleth coropleth choropleths coropleth chorus corws (in opera and secular music) chorus cytgan (=piece of music) chorus côr (=group of singers) chorus girl côr-ferch chorus girls côr-ferch chorus master côr-feistr chorus masters côr-feistr chosen physical activity gweithgaredd corfforol dewisol chrismation eneinio christening robe gŵn bedydd christening robes gŵn bedydd chromatic cromatig chromatic chord cord cromatig chromatic chords cord cromatig chromatic harp telyn gromatig chromatic harps telyn gromatig chromatic scale graddfa gromatig chromatic scales graddfa gromatig chromatic semitone hanner tôn cromatig chromatic semitones hanner tôn cromatig chromaticism cromatyddiaeth chromaticisms cromatyddiaeth chromatid cromatid chromatids cromatid chromatin cromatin chromatins cromatin chromatographic cromatograffig chromatography cromatograffaeth chrome crôm chrome green gwyrdd crôm chrome greens gwyrdd crôm chrome orange oren crôm chrome oranges oren crôm chromes crôm chromising cromeiddio chromium cromiwm (Cr) chromium screw sgriw gromiwm chromium screws sgriw gromiwm chromiums cromiwm (Cr) chromomer cromomer chromomers cromomer chromophore cromoffor chromophores cromoffor chromosomal cromosomaidd chromosome cromosom chromosome map map cromosomau (in biology) chromosome maps map cromosomau (in biology) chromosome number rhif cromosom chromosome numbers rhif cromosom chromosomes cromosom chromosphere cromosffer chromospheres cromosffer chronic cronig chronic confusional state cyflwr dryslyd cronig chronic confusional states cyflwr dryslyd cronig chronic illness gwaeledd cronig chronic pain poen cronig chronic pains poen cronig chronological cronolegol chronological age oed cronolegol chronological ages oed cronolegol chronological order trefn gronolegol chronological orders trefn gronolegol chronological understanding dealltwriaeth gronolegol chronological understandings dealltwriaeth gronolegol chronological writing ysgrifennu cronolegol chronology cronoleg chronometer coronomedr chronometers coronomedr chrysalis chwiler chuck crafanc chuck key allwedd grafanc chuck steak stêc balfais chuck steaks stêc balfais chucking crafangu chucking piece darn crafangu chucking pieces darn crafangu chucks crafanc church eglwys church cadence diweddeb amen church cadences diweddeb amen church committee pwyllgor eglwys church committees pwyllgor eglwys church embroidery brodwaith eglwysig church governor llywodraethwr eglwysig church governors llywodraethwr eglwysig church mode modd eglwysig church modes modd eglwysig church order trefn eglwys church orders trefn eglwys church with tower eglwys gyda thŵr churches eglwys churchwarden warden eglwys churchwardens warden eglwys churchyard mynwent eglwys churchyards mynwent eglwys churn buddai (to make butter) churn can llaeth (=can to hold milk) churns buddai (to make butter) churns can llaeth (=can to hold milk) chutney siytni chyle caul chyles caul chylomicron ceulomicron chylomicrons ceulomicron chyme treulfwyd chymes treulfwyd chymosin cymosin chymosins cymosin chymotrypsin cymotrypsin chymotrypsins cymotrypsin cichlid ciclid cichlids ciclid cider seidr ciders seidr ciliary ciliaraidd ciliary body corffyn ciliaraidd ciliary feeding ymborthi ciliaraidd ciliary muscle cyhyr ciliaraidd ciliary muscles cyhyr ciliaraidd ciliated epithelium epitheliwm ciliedig ciliated epitheliums epitheliwm ciliedig cilium ciliwm ciliums ciliwm cimbalom simbalom cimbaloms simbalom cinder cone côn lludw cinder cones côn lludw cinema auteur auteur sinema cinema auteurs auteur sinema cinnamon sinamon cinnamons sinamon cipher seiffr ciphers seiffr circadian rhythm rhythm circadaidd circadian rhythms rhythm circadaidd circle cylch circle cylchu circle chart siart cylch circle charts siart cylch circle formation trefniant cylch circle formations trefniant cylch circle of fifths cylch pumedau circles cylch circling cylchu (of foot, arms) circlip cylchglip circlips cylchglip circuit cylch rhedeg (=running track) circuit cylchdaith (of judge, preacher) circuit cylched (in electronics) circuit breaker torrwr cylched circuit breakers torrwr cylched circuit diagram diagram cylched circuit diagrams diagram cylched circuit judge barnwr cylchdaith circuit judges barnwr cylchdaith circuit response ymateb cylched circuit responses ymateb cylched circuit training hyfforddiant cylchol circuit trainings hyfforddiant cylchol circuit tuning cyweirio cylched circuit wave-forms tonffurfiau cylched circuits cylch rhedeg (=running track) circuits cylchdaith (of judge, preacher) circuits cylched (in electronics) circular crwn (=round) circular cylchlythyr (letter) circular cylchol (turning in circle) circular arch bwa crwn circular arches bwa crwn circular base gwaelod crwn circular bases gwaelod crwn circular buffer byffer cylchol circular buffers byffer cylchol circular cylinder silindr cylch circular cylinders silindr cylch circular dance dawns gylch circular dances dawns gylch circular die dei crwn circular dies dei crwn circular end pen crwn circular ends pen crwn circular flow of income llif cylchol incwm circular land glan gylchol (of reamer) circular lands glan gylchol (of reamer) circular lap seam sêm lap gylchol circular lap seams sêm lap gylchol circular list rhestr gylchol circular lists rhestr gylchol circular motion mudiant mewn cylch circular motion stitching pwytho cylchdro circular motions mudiant mewn cylch circular muscle cyhyryn crwn circular muscles cyhyryn crwn circular overfolded seam sêm orlap gylchol circular overfolded seams sêm orlap gylchol circular parry pario cylchol circular prism prism crwn circular prisms prism crwn circular pyramid pyramid crwn circular pyramids pyramid crwn circular saw llif gron circular saws llif gron circular shift syfliad cylchol circular shifts syfliad cylchol circular skirt sgert gylch circular skirts sgert gylch circular split die dei crwn hollt circular split dies dei crwn hollt circulars cylchlythyr (letter) circulate cylchredeg circulating cylchredol circulating capital cyfalaf cylchredol circulating capitals cyfalaf cylchredol circulating school ysgol gylchynol circulating schools ysgol gylchynol circulating waters dyfroedd cylchredol circulation cylchrediad circulations cylchrediad circulatory system system cylchrediad gwaed circulatory systems system cylchrediad gwaed circumcentre amganol circumcentres amganol circumcircle amgylch circumcircles amgylch circumcision enwaediad circumcisions enwaediad circumduction cylchddwytho circumference cylchedd (measurement) circumference cylchyn (line) circumferences cylchedd (measurement) circumferences cylchyn (line) circumflex acen grom circumflexes acen grom circumnavigate cylchfordeithio circumnavigation cylchfordaith circumnavigations cylchfordaith circumnavigator cylchforwr circumnavigators cylchforwr circumpolar constellation cytser ambegynol circumpolar constellations cytser ambegynol circumpolar star seren ambegynol circumpolar stars seren ambegynol circumscribe amgylchu circumscribed amgylchol circumscribed circle amgylch circumscribed circles amgylch circumscribed polygon polygon amgylchol circumscribed polygons polygon amgylchol circus syrcas cire perdue cwyr coll cire perdues cwyr coll cirque cwm cirques cwm cirrocumulus cirrocumulus cirrostratus cirrostratus cirrus cirrus cis cis cis-trans effect effaith trans-cis cis-trans effects effaith trans-cis cissoid cisoid cissoids cisoid cist cistfaen cistern seston cistern tower tŵr dyfrgist cistern towers tŵr dyfrgist cisterns seston cistron cistron cistrons cistron cists cistfaen citadel caer ddinesig citadels caer ddinesig citizen dinesydd citizens dinesydd citizenship dinasyddiaeth citizenships dinasyddiaeth citric acid asid citrig citric acids asid citrig citrulline citrwlin citrullines citrwlin citrus citrws citrus fruit ffrwyth citrws citrus fruits ffrwyth citrws cittern sitern citterns sitern city dinas city blues melan y ddinas city centre canol y ddinas city centres canol y ddinas city region rhanbarth dinas city regions rhanbarth dinas city state gwladwriaeth ddinas city states gwladwriaeth ddinas civic dinesig civic mathematics mathemateg ddinesig civic sense synnwyr dinesig civic senses synnwyr dinesig civil moesgar (=polite) civil sifil (of citizens) civil constitution cyfansoddiad sifil civil constitutions cyfansoddiad sifil civil defence amddiffyn sifil civil defences amddiffyn sifil civil disobedience anufudd-dod sifil civil disobediences anufudd-dod sifil civil engineering peirianneg sifil civil engineerings peirianneg sifil civil jurisdiction awdurdodaeth sifil civil jurisdictions awdurdodaeth sifil civil list rhestr sifil civil lists rhestr sifil civil proceedings achos sifil civil rights iawnderau sifil civil service gwasanaeth sifil civil services gwasanaeth sifil civil settlement anheddiad sifil civil settlements anheddiad sifil civil war rhyfel cartref civil wars rhyfel cartref civilian sifiliad civilians sifiliad civility gwarineb civilization gwareiddiad civilizations gwareiddiad civilized society cymdeithas wâr cladding cladin claddings cladin claim hawl claim hawlio claims hawl clamp clamp clamp clampio clamping device dyfais glampio clamping devices dyfais glampio clamping screw sgriw glampio clamping screws sgriw glampio clamps clamp clan clan clans clan clap clap clap clapio clap a steady beat clapio curiad cyson clap hands curo dwylo clap partner's hands curo dwylo partner clapper box blwch clepian clapper boxes blwch clepian claps clap clarified fat saim gloyw clarified fats saim gloyw clarify gloywi (in cooking) clarinet clarinét clarinets clarinét clarinettist clarinetydd clarinettists clarinetydd clarity eglurder clarity of body shape eglurder siâp y corff clarity of the notation eglurder y nodiant clarsach clarsach clarsaches clarsach clash gwrthdaro clasp clesbyn clasp nail hoelen lorio clasp nails hoelen lorio clasper clasper claspers clasper clasps clesbyn class dosbarth class distinction gwahaniaeth dosbarth class distinctions gwahaniaeth dosbarth class interval cyfwng dosbarth class intervals cyfwng dosbarth class management rheolaeth dosbarth class managements rheolaeth dosbarth class mark marc dosbarth class marks marc dosbarth class separation gwahaniad dosbarth class separations gwahaniad dosbarth class structure fframwaith dosbarth class structures fframwaith dosbarth class struggle rhyfel dosbarth class struggles rhyfel dosbarth classes of food mathau o fwyd classic pass pàs glasurol classic profile proffil clasurol classic profiles proffil clasurol classic style arddull clasurol classic styles arddull clasurol classical clasurol classical curriculum cwricwlwm clasurol classical curriculums cwricwlwm clasurol classical music cerddoriaeth glasurol classical musics cerddoriaeth glasurol classical studies astudiaethau clasurol classicism clasuriaeth classicisms clasuriaeth classicist clasurwr classicists clasurwr classics clasuron classification dosbarthiad classification system trefn ddosbarthu classification systems trefn ddosbarthu classifications dosbarthiad classify dosbarthu classify information dosbarthu gwybodaeth classroom ystafell ddosbarth classroom behaviour ymddygiad yn yr ystafell ddosbarth classroom behaviours ymddygiad yn yr ystafell ddosbarth classroom climate naws yr ystafell ddosbarth classroom climates naws yr ystafell ddosbarth classroom ensemble ensemble dosbarth classroom ensembles ensemble dosbarth classroom environment amgylchedd yr ystafell ddosbarth classroom environments amgylchedd yr ystafell ddosbarth classroom feedback adborth o'r ystafell ddosbarth classroom feedbacks adborth o'r ystafell ddosbarth classroom observation arsylwi yn yr ystafell ddosbarth classroom-based activities gweithgareddau ystafell ddosbarth classroom-based task tasg ystafell ddosbarth classroom-based tasks tasg ystafell ddosbarth classrooms ystafell ddosbarth clastic clastig clathrate cawellog clathrate clathrad clathrates clathrad clause cymal clauses cymal claustral clwystrol clausula diweddeb clausulas diweddeb clavecin clafesin claveciniste chwaraewr clafesin clavecinistes chwaraewr clafesin clavecins clafesin claves clafiau clavichord claficord clavichords claficord clavicle pont yr ysgwydd clavicles pont yr ysgwydd clavicymbal clafisymbal clavicymbals clafisymbal clavier llawfwrdd (keyboard) clavier offeryn llawfwrdd (instrument) claviers llawfwrdd (keyboard) claviers offeryn llawfwrdd (instrument) claw crafanc claw clutch cydiwr crafanc claw clutches cydiwr crafanc claw foot troed crafanc claw foots troed crafanc claw hammer morthwyl crafanc claw hammers morthwyl crafanc claw wrench tyndro crafanc claw wrenches tyndro crafanc claws crafanc clay clai clay bin bin clai clay bins bin clai clay cutter torrell glai clay cutters torrell glai clay modelling modelu â chlai clay modelling tool erfyn modelu clai clay modelling tools erfyn modelu clai clay relief cerfwedd glai clay reliefs cerfwedd glai clay tools offer clai clay vale dyffryndir clai clay vales dyffryndir clai clay with flints clai â challestr clean glân clean cut toriad glân clean cuts toriad glân clean hole twll glân clean holes twll glân clean mould mowld glân clean moulds mowld glân clean thread edau lân clean threads edau lân cleaner defnydd glanhau (of material) cleaner glanhawr (male and general) cleaner glanhawraig (female) cleaners defnydd glanhau (of material) cleaners glanhawr (male and general) cleaners glanhawraig (female) cleaning appliance dyfais lanhau cleaning appliances dyfais lanhau cleaning fluid hylif glanhau cleaning fluids hylif glanhau cleanliness glendid cleanse glanhau cleanser glanweithydd cleansers glanweithydd cleansing department adran lanweithio cleansing departments adran lanweithio cleansing lotion trwyth glanhau cleansing lotions trwyth glanhau clear clir (=transparent and most other senses) clear clirio clear eglur (=not confused) clear pendant (=distinct) clear beginning dechrau pendant clear beginnings dechrau pendant clear end diwedd pendant clear ends diwedd pendant clear finish gorffeniad clir clear finishs gorffeniad clir clear flute ffliwt glir clear flutes ffliwt glir clear glaze gwydredd gloyw clear glazes gwydredd gloyw clear lacquer lacr clir clear lacquers lacr clir clear lamp lamp glir clear lamps lamp glir clear middle canol pendant clear middles canol pendant clear plastic plastig clir clear plastics plastig clir clear polish llathrydd clir clear polishs llathrydd clir clear set of values set eglur o werthoedd clear sketch braslun eglur clear sketches braslun eglur clear varnish farnais clir clear varnishs farnais clir clearance cliriad clearance angle ongl gliriad clearance angles ongl gliriad clearance drill dril cliriad clearance drills dril cliriad clearance hole twll cliriad clearance holes twll cliriad clearances cliriad clearing gloywi (in histology) clearing llannerch clearing agent gloywydd clearing agents gloywydd clearing bank banc clirio clearing banks banc clirio clearings llannerch clearway clirffordd cleat cledd cleat cleddu cleats cledd cleavage holltiad (in chemistry) cleavage ymraniad (in biology) cleavage plane plân hollti cleavage planes plân hollti cleavages holltiad (in chemistry) cleavages ymraniad (in biology) clef cleff clefs cleff cleft hollt clefts hollt clench clensio (a nail, a rivet) clerestory llofft olau clergyman clerigwr clergymans clerigwr cleric clerigwr clerical clerigol clericalism clerigiaeth clericalisms clerigiaeth clerics clerigwr clerk clerc clerk of the course clerc y maes clerks clerc clerks regular clerigwyr rheolaidd clevis pin pìn clefis clevis pins pìn clefis click clicio client cleient client confidentiality cyfrinachedd cleient client dignity urddas y cleient client diversity amrywiaeth o gleientiaid client group grŵp o gleientiaid client groups grŵp o gleientiaid client state gwladwriaeth ddibynnol client states gwladwriaeth ddibynnol client-centred cleient ganolog client-directed approach dull wedi'i gyfeirio at y cleient client-directed approaches dull wedi'i gyfeirio at y cleient clientage cleientaeth clientages cleientaeth clients cleient cliff clogwyn cliff collapse clogwyn yn syrthio cliff collapses clogwyn yn syrthio cliff line llinell glogwyn cliff lines llinell glogwyn cliff recession enciliad clogwyn cliff recessions enciliad clogwyn cliffs clogwyn climate hinsawdd climate barrier gwahanfur rhag yr hinsawdd climate barriers gwahanfur rhag yr hinsawdd climates hinsawdd climatic conditions hinsawdd climatic extremes eithafion hinsawdd climatic feature nodwedd hinsoddol climatic features nodwedd hinsoddol climatic region rhanbarth hinsoddol climatic regions rhanbarth hinsoddol climatology hinsoddeg climax uchafbwynt climax vegetation uchafbwynt llystyfiant climax vegetations uchafbwynt llystyfiant climaxes uchafbwynt climb dringo climb high dringo'n uchel climb milling melino dringol (down cut) climb millings melino dringol (down cut) climbing feed porthiant dringol climbing feeds porthiant dringol climbing frame ffrâm ddringo climbing frames ffrâm ddringo climbing plant planhigyn dringo climbing plants planhigyn dringo climbing rope rhaff ddringo climbing ropes rhaff ddringo climbing wall wal ddringo climbing walls wal ddringo clinch a deal taro bargen cling film haenen lynu cling films haenen lynu clinic clinig clinical clinigol clinical assessment asesiad clinigol clinical assessments asesiad clinigol clinical audit archwiliad clinigol clinical audits archwiliad clinigol clinical psychologist seicolegydd clinigol clinical psychologists seicolegydd clinigol clinical psychology seicoleg glinigol clinical study astudiaeth glinigol clinical thermometer thermomedr clinigol clinical thermometers thermomedr clinigol clinical training hyfforddiant clinigol clinical trainings hyfforddiant clinigol clinically clean clinigol lân clinics clinig clinker clincer clinker eight clincer wyth clinker eights clincer wyth clinker four clincer pedwar clinker fours clincer pedwar clinker nailed boots esgidiau hoelion clincer clinkers clincer clinometer clinomedr clinometers clinomedr clint clint clints clint clip clip clip clipio clip art library llyfrgell glipluniau clipboard clipfwrdd clipboards clipfwrdd clipping distortion afluniad clipio clipping distortions afluniad clipio clips clip clitellum clitelwm clitellums clitelwm cloaca cloaca cloacas cloaca cloak clogyn cloaks clogyn clock cloc clock arithmetic rhifyddeg cloc clock arithmetics rhifyddeg cloc clock glass gwydryn cloc clock pulse curiad cloc clock pulse generator generadur curiadau cloc clock pulse generators generadur curiadau cloc clock pulses curiad cloc clock rate cyfradd cloc clock rates cyfradd cloc clock signal signal cloc clock signals signal cloc clocks cloc clockwise clocwedd clockwise consecutive revolutions cylchdroeon clocwedd olynol clockwise direction cyfeiriad clocwedd clockwise directions cyfeiriad clocwedd clockwise moment moment clocwedd clockwise moments moment clocwedd clog tagu (=choke) clog dance dawns y glocsen clog dances dawns y glocsen clog rattle rhuglen glocsen clog rattles rhuglen glocsen clogged surface arwyneb wedi tagu clogged surfaces arwyneb wedi tagu cloisonné enamel enamel cloisonné cloisonné enamels enamel cloisonné cloister clwysty cloistered clwystredig cloisters clwysty clone clonio clone clôn clones clôn close agos close cau close diweddeb (in music) close combat gornest glòs close combats gornest glòs close grain graen clòs close grains graen clòs close harmony harmoni clòs close packing pacio'n dynn close the key cau'r agoriad (of a switch) close the switch cau'r switsh close the tap cau'r tap close woven fabric ffabrig gwead clos close woven fabrics ffabrig gwead clos close-mouth tongs gefel gegdyn close-packing pacio tyn close-up agoslun (diagram) close-ups agoslun (diagram) closed ar gau (shop sign etc) closed caeedig closed circuit cylched gaeedig closed circuit television teledu cylch-caeedig (CCTV) closed circuit televisions teledu cylch-caeedig (CCTV) closed circuits cylched gaeedig closed circulation cylchrediad caeedig closed circulations cylchrediad caeedig closed eaves bondo caeedig closed fracture torasgwrn caeedig closed fractures torasgwrn caeedig closed interval cyfwng caeedig closed intervals cyfwng caeedig closed loop dolen gaeedig closed loops dolen gaeedig closed pack pecyn caeedig closed packs pecyn caeedig closed pipe pibell gaeedig closed pipes pibell gaeedig closed question cwestiwn caeedig closed questions cwestiwn caeedig closed shop siop gaeedig closed shops siop gaeedig closed stance safiad caeedig closed stances safiad caeedig closed system cyfundrefn gaeedig closed systems cyfundrefn gaeedig closes diweddeb (in music) closest approach nesâd agosaf closest approaches nesâd agosaf closing balance balans terfynol closing balances balans terfynol closing stile cledren gau closing stiles cledren gau closing stock stoc derfynol closing stocks stoc derfynol closure caefa closures caefa clot ceulo clot tolchen cloth brethyn (of heavy material) cloth clwt (for wiping etc) cloth lliain (of light material) cloth body corff lliain cloth patch clwt brethyn cloth patches clwt brethyn cloth trade masnach frethyn cloth trades masnach frethyn clothes dillad clothes basket basged ddillad clothes baskets basged ddillad clothes hanger cambren dillad clothes hangers cambren dillad clothes horse hors ddillad clothes horses hors ddillad clothes line lein ddillad clothes lines lein ddillad clothes peg peg dillad clothes pegs peg dillad clothes rack rhesel ddillad clothes racks rhesel ddillad clothier brethynnwr clothiers brethynnwr cloths brethyn (of heavy material) cloths clwt (for wiping etc) cloths lliain (of light material) clots tolchen clotted cream hufen tolch clotted creams hufen tolch cloud cwmwl cloud base gwaelod cwmwl cloud bases gwaelod cwmwl cloud chamber llestr niwl cloud chambers llestr niwl cloud cover gorchudd cwmwl cloud covers gorchudd cwmwl cloudburst torgwmwl cloudbursts torgwmwl cloudiness cymyledd cloudlet cymylyn cloudlets cymylyn clouds cwmwl clout nail hoelen benfawr clout nails hoelen benfawr clove clof clove hitch cwlwm glyn clove hitches cwlwm glyn clover meillionen clover leaf junction cyffordd dail meillion clover leaf junctions cyffordd dail meillion clovers meillionen cloves clof clown clown clowns clown cloze exercise ymarfer llenwi bylchau cloze exercises ymarfer llenwi bylchau cloze procedure dull cyfannu cloze procedures dull cyfannu club clwb club foot troed glwb club foots troed glwb club-moss clwbfwsogl clubhouse tŷ clwb clubhouses tŷ clwb clubs clwb clumsiness lletchwithdod clumsy child syndrome syndrom plentyn afrosgo clumsy child syndromes syndrom plentyn afrosgo cluster clwstwr cluster clystyru clusters clwstwr clutch cydiwr clutch gafael clutch lever lifer cydiwr clutch levers lifer cydiwr clutch plate plât cydio clutch plates plât cydio clutches cydiwr co-dominance cyd-drechedd co-dominances cyd-drechedd co-dominant cyd-drechol co-dominant cyd-drechydd co-dominants cyd-drechydd co-education cydaddysg co-educational scheme cynllun cydaddysgol co-educational schemes cynllun cydaddysgol co-educational school ysgol gydaddysgol co-educational schools ysgol gydaddysgol co-educations cydaddysg co-enzyme cydensym co-enzymes cydensym co-ionic coïonig co-latitude cyfledred co-latitudes cyfledred co-operative bank banc cydweithredol co-operative banks banc cydweithredol co-operative business busnes cydweithredol co-operative play chwarae cydweithredol co-operative shop siop gydweithredol co-operative shops siop gydweithredol co-operative society cymdeithas gydweithredol co-operative teaching addysgu cydweithredol co-opt cyfethol co-opted member aelod cyfetholedig co-opted members aelod cyfetholedig co-reactive cydadweithiol co-respondent cydatebydd co-respondents cydatebydd co-tidal line llinell gyflanw co-tidal lines llinell gyflanw coacervate coaserfad coacervates coaserfad coacervation coaserfadiad coacervations coaserfadiad coach bws moethus (=bus) coach hyfforddi coach hyfforddwr (=trainer, male and general) coach hyfforddwraig (=trainer, female) coach bolt bollt goets coach bolts bollt goets coach horn corn cerbyd coach horns corn cerbyd coach screw sgriw goets coach screws sgriw goets coaches bws moethus (=bus) coaches hyfforddwr (=trainer, male and general) coaches hyfforddwraig (=trainer, female) coaching hyfforddiant coachings hyfforddiant coagulate ceulo (in general) coagulate clystyru (in chemistry) coagulate tolchennu (of blood) coagulated ceuledig coagulation ceulad (in general) coagulation tolcheniad (of blood) coagulations ceulad (in general) coagulations tolcheniad (of blood) coal glo coal industry diwydiant glo coal measures cystradau glo coal tar col-tar coal tar coltario coal tar dye llifyn col-tar coal tar dyes llifyn col-tar coal tars col-tar coal-bearing rocks creigiau â glo coalesce cyfuno coalescence cyfuniad coalescences cyfuniad coalfield maes glo coalfields maes glo coalfish chwitlyn glas coalfishs chwitlyn glas coalition clymblaid coalitions clymblaid coals glo coaming ymyled coamings ymyled coarse bras (=large grained) coarse garw (=rough textured) coarse adjustment cymhwysiad bras coarse adjustments cymhwysiad bras coarse control rheolydd bras coarse controls rheolydd bras coarse feed porthiant garw coarse feeds porthiant garw coarse grain graen bras coarse grains graen bras coarse grit grit bras coarse grits grit bras coarse knurl nwrl bras coarse knurls nwrl bras coarse oilstone carreg hogi gradd arw coarse oilstones carreg hogi gradd arw coarse pitch pitsh bras coarse pitches pitsh bras coarse surface arwyneb bras coarse surfaces arwyneb bras coarse texture gwead bras coarse textures gwead bras coarse thread edau fras coarse threads edau fras coarseness garwedd coast arfordir coast of emergence arfordir cyfodol coastal arfordirol coastal current cerrynt arfordirol coastal currents cerrynt arfordirol coastal feature arwedd arfordirol coastal features arwedd arfordirol coastal flooding llifogydd arfordirol coastal landform tirffurf arfordirol coastal landforms tirffurf arfordirol coastal marsh morfa coastal marshs morfa coastal plain gwastadedd arfordirol coastal plains gwastadedd arfordirol coastguard gwyliwr y glannau coastguards gwyliwr y glannau coasting cowstio coastline morlin coastlines morlin coasts arfordir coat araen (in metalwork, plastics) coat araenu (in metalwork, plastics) coat caen (in cooking) coat caenu (in cooking) coat cot (of clothing, paint) coat of arms arfbais coat weight pwysau cot coat-dress cot ffrog coating batter cytew caenu coating batters cytew caenu coats araen (in metalwork, plastics) coats caen (in cooking) coats cot (of clothing, paint) coaxial cyfechelog coaxial cable cebl cyfechelog coaxial cables cebl cyfechelog coaxial circles cylchoedd cyfechelin cobalt cobalt (Co) cobalt green gwyrdd cobalt cobalt greens gwyrdd cobalt cobalt violet fioled cobalt cobalt violets fioled cobalt cobalts cobalt (Co) cobble cobl cobbles cobl cobra bit ebill cobra cobra bits ebill cobra coccidiosis cocsidiosis coccus cocws coccyx asgwrn cynffon coccyxes asgwrn cynffon cochlea cochlea cochlear canal tiwb y cochlea cochlear canals tiwb y cochlea cochleas cochlea cockfeather pluen geiliog cockfeathers pluen geiliog cockle cocosen cockles cocosen cockpit talwrn cockpits talwrn cocktail coctel cocktail stick pren coctel cocktail sticks pren coctel cocktails coctel cocoa coco cocoas coco coconut cneuen goco coconuts cneuen goco cocoon cocŵn cocoons cocŵn cocotte cocotte cocottes cocotte cod penfras cod steak stecen benfras cod steaks stecen benfras coda coda codas coda code cod code codio code figure rhif cod code figures rhif cod code generation cynhyrchu cod code of behaviour cod ymddygiad code of conduct cod ymddygiad code of good practice cod ymarfer da code of practice cod ymarfer coder codydd coders codydd codes cod codetta codeta codettas codeta codex codecs codexes codecs codification codeiddiad codifications codeiddiad codifier codeiddiwr codifiers codeiddiwr codify codeiddio coding codio coding sheet taflen godio coding sheets taflen godio coefficient cyfernod coefficient of expansion cyfernod ehangiad coefficient of friction cyfernod ffrithiant coefficient of linear expansion cyfernod ehangiad llinol coefficient of regression cyfernod atchwel coefficient of resistance cyfernod gwrthiant coefficient of restitution cyfernod adfer coefficient of variation cyfernod amrywiad coefficients cyfernod coeliac coeliag coelom coelom coeloms coelom coenobites coenobia coerce gorfodi coercion gorfodaeth coercions gorfodaeth coffee coffi coffee beans ffa coffi coffee break amser paned coffee breaks amser paned coffee maker peiriant coffi coffee makers peiriant coffi coffee table bwrdd coffi coffee tables bwrdd coffi coffees coffi coffer coffr coffers coffr cog cocsen cogged danheddog cogged joint uniad cocsen cogged joints uniad cocsen cogging cogyddio (using fullers) cognition gwybyddiaeth cognitions gwybyddiaeth cognitive gwybyddol cognitive ability gallu gwybyddol cognitive behaviour therapy therapi ymddygiad gwybyddol cognitive competence cymhwysedd gwybyddol cognitive competences cymhwysedd gwybyddol cognitive deficit diffyg gwybyddol cognitive deficits diffyg gwybyddol cognitive development datblygiad gwybyddol cognitive developments datblygiad gwybyddol cognitive disorder anhwylder gwybyddol cognitive disorders anhwylder gwybyddol cognitive disturbance tarfiad gwybyddol cognitive disturbances tarfiad gwybyddol cognitive domain maes gwybyddol cognitive domains maes gwybyddol cognitive learning dysgu gwybyddol cognitive meaning ystyr gwybyddol cognitive meanings ystyr gwybyddol cognitive objective amcan gwybyddol cognitive objectives amcan gwybyddol cognitive process proses wybyddol cognitive psychology seicoleg wybyddol cognitive restructuring ailstrwythuro gwybyddol cognitive test prawf gwybyddol cognitive tests prawf gwybyddol cognizance of pleas hawl pledio cogwheel olwyn gocos cogwheels olwyn gocos coherence cydlyniad coherences cydlyniad coherent cydlynol (of whole, of parts) coherent dealladwy (of language) coherent rhesymegol (of argument etc) coherent trefnus (of person) cohesion cydlyniad cohesions cydlyniad cohesive cydlynol cohesiveness cydlynrwydd cohort carfan (=people treated as a group) cohort mintai (Roman military usage) cohorts carfan (=people treated as a group) cohorts mintai (Roman military usage) coil coil (in electronics) coil torch (of rope, hair, clay) coil ignition taniad coil coil ignitions taniad coil coil spring sbring coil coil springs sbring coil coiled torchog coiling torchi (pottery) coils coil (in electronics) coils torch (of rope, hair, clay) coin darn arian coin hoard celc arian bath coin hoards celc arian bath coinage arian bath coinages arian bath coincide cyd-daro coincident cyd-drawol coins darn arian coke golosg coke fuel tanwydd golosg coke fuels tanwydd golosg coke oven batteries cyfres ffyrnau golosg cokes golosg coking coal glo golosg coking coals glo golosg col col col legno col legno colander colandr colanders colandr cold annwyd (=common cold) cold oer cold oerni cold chisel cŷn caled cold chisels cŷn caled cold colour lliw oer cold colours lliw oer cold drawn wedi'i dynnu'n oer (with masculine nouns) cold drawn wedi'i thynnu'n oer (with feminine nouns) cold front ffrynt oer cold fronts ffrynt oer cold glue glud oer cold glues glud oer cold restart ailgychwyniad oer cold restarts ailgychwyniad oer cold riveting rhybedu oer cold set set oer cold sets set oer cold shortness oer freuder cold soldering sodro oer cold strip mill melin strip oer cold strip mills melin strip oer cold sweet pwdin oer cold sweets pwdin oer cold war rhyfel oer cold wars rhyfel oer cold water dye llifyn dŵr oer cold water dyes llifyn dŵr oer cold water glue glud dŵr oer cold water glues glud dŵr oer cold water paste past dŵr oer cold water pastes past dŵr oer cold water starch startsh dŵr oer cold water starches startsh dŵr oer cold welding weldio oer cold wind rhewynt cold winds rhewynt cold working of materials gweithio defnyddiau'n oer cold-forming ffurfio'n oer colds annwyd (=common cold) colds oerni coleoptile coleoptil coleoptiles coleoptil coleorhiza coleorhisa coleorhizas coleorhisa coleslaw coleslaw coleslaws coleslaw coley celog colic colig colics colig colitic colitig collaborator cydweithredwr collaborators cydweithredwr collage collage collagen colagen collagens colagen collages collage collapse cwymp collapse cwympo collapse the scrum cwympo'r sgrym collapses cwymp collar coler collar hammer morthwyl coleru collar hammers morthwyl coleru collar with band coler â band collarbone pont yr ysgwydd collarbones pont yr ysgwydd collared urn wrn colerog collared urns wrn colerog collaring coleru collars coler collate coladu collateral bundle sypyn cyfraidd collateral bundles sypyn cyfraidd collation coladiad collations coladiad collator coladydd collators coladydd collect casglu collect information casglu gwybodaeth collect the ball casglu'r bêl collection casgliad collections casgliad collective bargaining cydfargeinio collective farm fferm gyfunol collective farms fferm gyfunol collective worship addoli ar y cyd collectivism cyfunoliaeth collectivisms cyfunoliaeth collectivization cyfunoliad collectivizations cyfunoliad collector current cerrynt y casglydd collector currents cerrynt y casglydd college coleg college board bwrdd coleg college boards bwrdd coleg college of education coleg addysg college of further education coleg addysg bellach college of higher education coleg addysg uwch colleges coleg collegiate church eglwys golegaidd collegiate churches eglwys golegaidd collegiate university prifysgol golegol collenchyma colencyma collenchymas colencyma collet colet collet chuck crafanc colet collet chucks crafanc colet collet hammer morthwyl colet collet hammers morthwyl colet collets colet collide gwrthdaro collider gwrthdrawydd colliders gwrthdrawydd colliery pwll glo colligate cydglymu colligative property priodwedd gydglymu collimator cyflinydd collimators cyflinydd collinear unllin collinearity unllinedd collineation unlliniad collineations unlliniad collision gwrthdrawiad collisionless model model anwrthdrawol collisionless models model anwrthdrawol collisions gwrthdrawiad colloid coloid colloidal coloidaidd colloidal solution hydoddiant coloidaidd colloidal solutions hydoddiant coloidaidd colloids coloid colloquy cynulliad collusion cydgynllwynio colluvial casglifol colluvium casglifiad colluviums casglifiad cologarithm cyflogarithm cologarithms cyflogarithm colon colon colonel cyrnol colonels cyrnol colonial trefedigaethol colonial history hanes y trefedigaethau colonial preference blaenoriaeth i'r trefedigaethau colonial preferences blaenoriaeth i'r trefedigaethau colonization gwladychiad colonizations gwladychiad colonize cytrefu (in biology) colonize trefedigaethu (in history) colons colon colony cytref (in biology) colony trefedigaeth (in history) coloratura coloratwra coloratura soprano soprano goloratwra colorimeter colorimedr colorimeters colorimedr colostomy colostomi colostrum colostrwm colostrums colostrwm colour lliw colour lliwio colour additive ychwanegyn lliw colour additives ychwanegyn lliw colour bar gwaharddiad lliw (in apartheid) colour bars gwaharddiad lliw (in apartheid) colour blind dall i liwiau colour blindness dallineb lliw colour block bloc lliw colour blocks bloc lliw colour box blwch lliw colour boxes blwch lliw colour cake teisen liw colour cakes teisen liw colour chart siart lliwiau colour charts siart lliwiau colour coding cod lliwiau colour codings cod lliwiau colour combinations cyfuniadau o liwiau colour filter hidlydd lliw colour filters hidlydd lliw colour medium cyfrwng lliw colour mediums cyfrwng lliw colour mixing cymysgu lliwiau colour pencil pensil lliw colour pencils pensil lliw colour perspective persbectif lliw colour perspectives persbectif lliw colour print print lliw colour prints print lliw colour range amrediad lliw colour ranges amrediad lliw colour rendering rendro lliw colour scheme cynllun lliw colour schemes cynllun lliw colour stick ffon lliw colour sticks ffon lliw colour tooling leaf dalen offeru lliw colour tooling leafs dalen offeru lliw colour vision golwg lliw colour visions golwg lliw colourant lliwydd colourants lliwydd colouration lliwiad colourations lliwiad coloured bead glain lliw coloured beads glain lliw coloured card cerdyn lliw coloured cardboard cardbord lliw coloured cardboards cardbord lliw coloured cards cerdyn lliw coloured cartridge paper papur cetris lliw coloured cartridge papers papur cetris lliw coloured cellophane seloffan lliw coloured cellophanes seloffan lliw coloured cement sment lliw coloured cements sment lliw coloured chalk sialc lliw coloured chalks sialc lliw coloured drawing ink inc lluniadu lliw coloured drawing inks inc lluniadu lliw coloured eyelet llygaden liw coloured eyelets llygaden liw coloured felt ffelt lliw coloured felts ffelt lliw coloured glass gwydr lliw coloured glassware llestri gwydr lliw coloured lace carrai liw coloured laces carrai liw coloured paper papur lliw coloured papers papur lliw coloured perspex persbecs lliw coloured perspexes persbecs lliw coloured plasticine plastisin lliw coloured plasticines plastisin lliw coloured starch startsh lliw coloured starches startsh lliw coloured tissue paper papur sidan lliw coloured tissue papers papur sidan lliw colourfast dye llifyn anniflan colourfast dyes llifyn anniflan colouring lliwio (in finishing metal) colouring agent cyfrwng lliwio colouring agents cyfrwng lliwio colourless di-liw colours lliw column colofn column break toriad colofn column breaks toriad colofn column graph graff colofn column graphs graff colofn column matrix matrics colofn column matrixes matrics colofn column of threes colofn drioedd (Llanofer) column vector fector colofn column vectors fector colofn columnar epithelium epitheliwm colofnog columnar epitheliums epitheliwm colofnog columns colofn comb crib comb cribo comb joint uniad crib comb joints uniad crib comb of harp crib telyn combat gornest combats gornest combination cyfuniad combination cyfunol combination callipers caliperau cyfunol combination chuck crafanc gyfunol combination chucks crafanc gyfunol combination drill dril canoli cyfunol combination drills dril canoli cyfunol combination easel îsl cyfunol combination easels îsl cyfunol combination hinge colfach cyfunol combination hinges colfach cyfunol combination of the two cyfuniad o'r ddau combination of units cyfuniad o unedau combination oilstone carreg hogi ddwbl combination oilstones carreg hogi ddwbl combination pedal pedal cyfuno combination pedals pedal cyfuno combination piston piston cyfuno combination pistons piston cyfuno combination plane plaen amlddefnydd combination planes plaen amlddefnydd combination pliers gefelen gyfunol combination punches cyfuniad dyrnodau combination set set gyfunol combination sets set gyfunol combination square sgwâr cyfunol combination squares sgwâr cyfunol combination stop stop cyfuno combination stops stop cyfuno combination tone cyfunsain combination tones cyfunsain combinations cyfuniad combinatorial cyfuniadol combine cyfuno combine harvester dyrnwr medi combine harvesters dyrnwr medi combined cyfunol combined carbon carbon cyfunol combined carbons carbon cyfunol combined gate knife and heart trowel cyllell gât a thrywel calon cyfunol combined rivet set and snap set a snap rhybed cyfunol combined subject syllabus maes llafur pwnc cyfun combined vaults llofneidiau cysylltiol combining text cyfuno testun combs crib combustible hylosg combustion hylosgiad (in chemistry) combustion taniad (in general) combustions hylosgiad (in chemistry) combustions taniad (in general) come to rest dod i aros comet comed comets comed comfort cysur comfort cysuro comfort conditions amodau cysur comfort survey arolwg cyfforddusrwydd comfortable cyffyrddus comforts cysur comic atmosphere awyrgylch comig comic atmospheres awyrgylch comig comic character cymeriad comig comic characters cymeriad comig comic opera opera gomig comic operas opera gomig comma coma command gorchymyn command code cod gorchymyn command codes cod gorchymyn command word gair gorchymyn command words gair gorchymyn command-response method dull gorchymyn ac ymateb command-response methods dull gorchymyn ac ymateb commander cadlywydd (military) commander comander (naval) commander-in-chief cadbennaeth commander-in-chiefs cadbennaeth commanders cadlywydd (military) commanders comander (naval) commandery pencadlys commands gorchymyn commas coma commencement date dyddiad cychwyn commencement dates dyddiad cychwyn commendation cymeradwyaeth commendations cymeradwyaeth commensal cydfwytaol commensalism cydfwytäedd commensalisms cydfwytäedd commensurable cyfesur comment sylw comment bank cronfa sylwadau comment banks cronfa sylwadau commentary esboniad (=explanatory notes) commentary sylwebaeth (=descriptive spoken account) commentator esboniwr (on bible) commentator sylwebydd (on game etc) commentators esboniwr (on bible) commentators sylwebydd (on game etc) comments sylw commerce masnach commerces masnach commercial masnachol commercial application cymhwysiad masnachol commercial applications cymhwysiad masnachol commercial arithmetic rhifyddeg masnach commercial arithmetics rhifyddeg masnach commercial art celfyddyd fasnachol commercial arts celfyddyd fasnachol commercial baby foods bwydydd masnachol i fabanod commercial bank banc masnachol commercial banks banc masnachol commercial capitalism cyfalafiaeth fasnach commercial capitalisms cyfalafiaeth fasnach commercial court llys masnach commercial courts llys masnach commercial data processing prosesu data masnachol commercial education addysg fasnachol commercial educations addysg fasnachol commercial function swyddogaeth fasnachol commercial functions swyddogaeth fasnachol commercial laundry golchdy masnachol commercial law cyfraith fasnachol commercial laws cyfraith fasnachol commercial pattern patrwm parod commercial patterns patrwm parod commercial privilege braint fasnachol commercial privileges braint fasnachol commercial rivalry cystadleuaeth fasnachol commercial traveller trafaeliwr commercial travellers trafaeliwr commercial viability dichonoldeb masnachol comminution pyloriant comminutions pyloriant commissar comisar commissars comisar commissary general dirprwy cyffredinol commissary generals dirprwy cyffredinol commission comisiwn commission comisiynu commission of array comisiwn aráe commission of oyer and terminer comisiwn oyer a terminer commissioner comisiynydd commissioners comisiynydd commissions comisiwn commit traddodi (for trial) commit suicide cyflawni hunanladdiad commitment ymrwymiad commitments ymrwymiad commitments to expenditure ymrwymiadau gwario committed ymrwymedig committee pwyllgor committees pwyllgor commode comôd commodes comôd commodity nwydd commodore comodor commodores comodor common cyffredin common agricultural policy polisi amaethyddol cyffredin (CAP) common ancestor cyd-hynafiad common ancestors cyd-hynafiad common assault ymosod cyffredin common chord cord cyffredin common chords cord cyffredin common cold annwyd common colds annwyd common component cydran gyffredin common components cydran gyffredin common curriculum cwricwlwm cyffredin common curriculums cwricwlwm cyffredin common difference gwahaniaeth cyffredin common differences gwahaniaeth cyffredin common ethos ethos cyffredin common fraction ffracsiwn cyffredin common fractions ffracsiwn cyffredin common joint uniad cyffredin common joints uniad cyffredin common land tir comin common lands tir comin common law cyfraith gwlad common laws cyfraith gwlad common logarithm logarithm cyffredin common logarithms logarithm cyffredin common metre mesur cyffredin common metres mesur cyffredin common mode modd-cyffredin common mode rejection ratio cymhareb wrthod modd-cyffredin common of pasture cytawl pori common of turbary hawl torri mawn common penny treth y geiniog common practice course cwrs ymarfer cyffredinol common practice courses cwrs ymarfer cyffredinol common professional examination arholiad cyffredinol proffesiynol common professional examinations arholiad cyffredinol proffesiynol common ratio cymhareb gyffredin common room ystafell gyffredin common rooms ystafell gyffredin common salt halen common salts halen common sense synnwyr cyffredin common senses synnwyr cyffredin common speech iaith gyffredin common speeches iaith gyffredin common standard unit uned safonol gyffredin common standard units uned safonol gyffredin common standards safonau cyffredin common syllabus maes llafur cyffredin common thread edau gyffredin common threads edau gyffredin common time amser cyffredin common times amser cyffredin common values gwerthoedd cyffredin commonalty pobl gyffredin commoner gwrêng commoners gwrêng commote cwmwd commotes cwmwd communal cymunedol commune comiwn communes comiwn communicate cyfathrebu communicate cyfleu communicate ideas cyfleu syniadau communicate information cyfleu gwybodaeth communicate meaning cyfleu ystyr communication cyfathrebiad communication channel sianel gyfathrebu communication channels sianel gyfathrebu communication difficulty anhawster cyfathrebu communication line lein gyfathrebu communication lines lein gyfathrebu communication link cyswllt cyfathrebu communication links cyswllt cyfathrebu communication network rhwydwaith cyfathrebu communication networks rhwydwaith cyfathrebu communication skill sgìl cyfathrebu communication skills sgìl cyfathrebu communication system system gyfathrebu communication systems system gyfathrebu communicational cyfathrebol communications cyfathrebiad communications processing prosesu cyfathrebiadau communion cymundeb communion table bwrdd y cymun communion tables bwrdd y cymun communions cymundeb communism comiwnyddiaeth communisms comiwnyddiaeth communist comiwnydd communist comiwnyddol communists comiwnydd community cymuned community care gofal yn y gymuned community care plan cynllun gofal yn y gymuned community care plans cynllun gofal yn y gymuned community care worker gweithiwr gofal yn y gymuned community care workers gweithiwr gofal yn y gymuned community cares gofal yn y gymuned community centre canolfan gymunedol community centres canolfan gymunedol community college coleg cymunedol community colleges coleg cymunedol community development datblygiad cymunedol community developments datblygiad cymunedol community education addysg gymunedol community educations addysg gymunedol community home cartref cymuned community homes cartref cymuned community hospital ysbyty cymuned community hospitals ysbyty cymuned community links cysylltiadau gyda'r gymuned community living service gwasanaeth byw yn y gymuned community living services gwasanaeth byw yn y gymuned community mental health team tîm cymuned iechyd meddwl community mental health teams tîm cymuned iechyd meddwl community nurse nyrs cymuned community nurses nyrs cymuned community physician meddyg cymuned community physicians meddyg cymuned community psychiatric nurse nyrs seiciatrig cymuned community psychiatric nurses nyrs seiciatrig cymuned community school ysgol gymunedol community schools ysgol gymunedol community spirit ysbryd cymunedol community spirits ysbryd cymunedol community support service gwasanaeth cynnal yn y gymuned community support services gwasanaeth cynnal yn y gymuned community unit uned gymunedol community units uned gymunedol commutation cymudiad commutations cymudiad commutative cymudol commutative group grŵp cymudol commutative groups grŵp cymudol commutative law deddf gymudol commutative laws deddf gymudol commutator cymudadur commutators cymudadur commute cymudo commuter cymudwr commuters cymudwr commuting pattern patrwm cymudo commuting patterns patrwm cymudo compact cryno compact cywasgu compaction cywasgiad compactions cywasgiad compactness crynoder compactor crynodiadur compactors crynodiadur companion cell cymargell companion cells cymargell companion teaching addysgu cefnogol company cwmni company finance arian cwmni company finances arian cwmni company logo logo'r cwmni company secretary ysgrifennydd y cwmni company union undeb y cwmni company unionism undebaeth cwmni company unionisms undebaeth cwmni company unions undeb y cwmni company website gwefan cwmni company websites gwefan cwmni comparability cymaroldeb comparable cymaradwy (in economics) comparative cymharol comparative advantage mantais gymharol comparative advantages mantais gymharol comparative cost cost gymharol comparative costs cost gymharol comparative linguistics ieithyddiaeth gymharol comparative psychology seicoleg gymharol comparative reading darllen cymharol comparative readings darllen cymharol comparative scale graddfa gymharol comparative scales graddfa gymharol comparative study astudiaeth gymharol comparator cymharydd comparators cymharydd compare cymharu compare results cymharu canlyniadau comparison cymhariaeth comparison goods nwyddau cymhariaeth comparisons cymhariaeth compartment adran compartments adran compass cwmpas (=extent, range of tone) compass cwmpawd (to find direction) compass callipers caliperau cwmpas compass housing amgaead cwmpawd compass housings amgaead cwmpawd compass north gogledd cwmpawd compass norths gogledd cwmpawd compass plane plaen amgrwm compass planes plaen amgrwm compass saw llif gwmpas compass saws llif gwmpas compass walk taith gwmpawd compass walks taith gwmpawd compassion tosturi compassions tosturi compatibility cydweddiad (of computer parts) compatible cydnaws (in general) compensate digolledu (=recompense) compensate gwneud iawn (=make amends) compensation iawndal compensation agreement cytundeb iawndal compensation agreements cytundeb iawndal compensations iawndal compensatory changes newidiadau cydadferol compensatory education addysg gydadferol compensatory educations addysg gydadferol compensatory exercise ymarfer cydadfer compensatory exercises ymarfer cydadfer compensatory programme rhaglen gydadferol compensatory programmes rhaglen gydadferol compete cystadlu compete for the ball cystadlu am y bêl competence cymhwysedd (in education) competence cymhwyster (of river) competences cymhwysedd (in education) competences cymhwyster (of river) competent cymwys competition cystadleuaeth competition for resources cystadlu am adnoddau competition pricing prisio ar sail cystadleuaeth competition rule rheol cystadlu competition rules rheol cystadlu competitions cystadleuaeth competitive cystadleuol competitive exclusion gwaharddiad cystadleuol competitive exclusions gwaharddiad cystadleuol competitive game gêm gystadleuol competitive games gêm gystadleuol competitive play chwarae cystadleuol competitive release rhyddhad cystadleuol competitive releases rhyddhad cystadleuol competitive task tasg gystadleuol competitive tasks tasg gystadleuol competitive team games gemau tîm cystadleuol competitiveness awydd i gystadlu competitor cystadleuydd competitors cystadleuydd compilation crynhoad compilation process proses grynhoad compilations crynhoad compile crynhoi compiled language iaith grynoadol compiled languages iaith grynoadol compiler crynhoydd compilers crynhoydd compiling program rhaglen grynhoi compiling programs rhaglen grynhoi complain cwyno complaint anhwylder (physical / medical) complaint cwyn (=grievance) complaints anhwylder (physical / medical) complaints cwyn (=grievance) complaints procedure dull gweithredu cwynion complaints procedures dull gweithredu cwynion complement cyflenwad complement cyflenwi complementarity cyfatebolrwydd complementary cyflenwol complementary addition method dull adio cyflenwol complementary addition methods dull adio cyflenwol complementary angle ongl gyflenwol complementary angles ongl gyflenwol complementary base pair pâr cyflenwol o fasau complementary base pairs pâr cyflenwol o fasau complementary colour lliw cyflenwol complementary colours lliw cyflenwol complementary therapy therapi cyflenwol complements cyflenwad complements cyfun-nwyddau (of goods) complete cwblhau complete cyflawn complete cadence diweddeb berffaith complete cadences diweddeb berffaith complete circuit cylched gyflawn complete circuits cylched gyflawn complete primitive datrysiad cyflawn complete primitives datrysiad cyflawn complete radiation pelydriad cyflawn complete radiations pelydriad cyflawn complete revolution cylchdro cyflawn complete revolutions cylchdro cyflawn complete section trychiad cyflawn complete sectional elevation golwg trychiadol cyflawn complete sectional elevations golwg trychiadol cyflawn complete sections trychiad cyflawn complete the square cwblhau'r sgwâr complete turn tro cyflawn complete turns tro cyflawn complete view golwg cyflawn complete views golwg cyflawn completely yn llwyr completeness cyflawnrwydd complex cymhleth (=complicated) complex cymhlyg (consisting of related parts composite) complex cymhlygu (of chemicals) complex cymhlygyn (in chemistry) complex conjugate cyfiau cymhlyg complex conjugates cyfiau cymhlyg complex event digwyddiad cymhleth complex events digwyddiad cymhleth complex function ffwythiant cymhlyg complex functions ffwythiant cymhlyg complex instruction set set cyfarwyddiadau cymhleth complex instruction sets set cyfarwyddiadau cymhleth complex number rhif cymhlyg complex numbers rhif cymhlyg complex roots gwreiddiau cymhlyg complex sequence of movements dilyniant cymhleth o symudiadau complex skills sgiliau cymhleth complex variable newidyn cymhlyg complex variables newidyn cymhlyg complexes cymhlygyn (in chemistry) complexity cymhlethdod compliance cydymffurfiad (in general) compliances cydymffurfiad (in general) complicated fracture torasgwrn cymhleth complicated fractures torasgwrn cymhleth complication cymhlethdod complications cymhlethdod compline cwmplin complines cwmplin compoboard cywasgfwrdd compoboards cywasgfwrdd component cydran component drawing lluniad cydrannau component drawings lluniad cydrannau component molecule moleciwl cydrannol component molecules moleciwl cydrannol component of a force cydran grym component of velocity cydran cyflymder component part darn cydrannol component parts darn cydrannol components cydran compose cyfansoddi compose sequences cyfansoddi dilyniannau composer cyfansoddwr composers cyfansoddwr composite cyfansawdd composite demand galw cyfansawdd composite demands galw cyfansawdd composite end view ochrolwg cyfansawdd composite end views ochrolwg cyfansawdd composite materials defnyddiau cyfansawdd composite stitch pwyth cyfansawdd composite stitches pwyth cyfansawdd composite view golwg cyfansawdd composite views golwg cyfansawdd composition cyfansoddiad (in general) composition traethawd (=essay) composition of blood cyfansoddiad gwaed composition pedal pedal cyfuno composition pedals pedal cyfuno composition piston piston cyfuno composition pistons piston cyfuno compositional cyfansoddiadol compositional weight pwyslais cyfansoddiadol compositional weights pwyslais cyfansoddiadol compositions cyfansoddiad (in general) compositions traethawd (=essay) compote compot compotes compot compound cyfansawdd compound cyfansoddyn compound cymhlethu (a problem etc) compound attack ymosod cyfun compound attacks ymosod cyfun compound binary form ffurf ddwyran gyfansawdd compound binary forms ffurf ddwyran gyfansawdd compound curve cromlin gyfansawdd compound curves cromlin gyfansawdd compound drive gyriad cyfansawdd compound drives gyriad cyfansawdd compound eye llygad cyfansawdd compound eyes llygad cyfansawdd compound fracture torasgwrn agored compound fractures torasgwrn agored compound gear train trên gêr cyfansawdd compound gear trains trên gêr cyfansawdd compound inflorescence fflurgainc gyfansawdd compound inflorescences fflurgainc gyfansawdd compound interest adlog compound interests adlog compound interval cyfwng cyfansawdd compound intervals cyfwng cyfansawdd compound key allwedd gyfansawdd compound leaf deilen gyfansawdd compound leafs deilen gyfansawdd compound line graph graff llinell gyfansawdd compound line graphs graff llinell gyfansawdd compound matrix matrics cyfansawdd compound matrixes matrics cyfansawdd compound pendulum pendil cyfansawdd compound pendulums pendil cyfansawdd compound riposte riposte cyfun compound ripostes riposte cyfun compound shape siâp cyfansawdd compound shapes siâp cyfansawdd compound shoreline traethlin cyfansawdd compound shorelines traethlin cyfansawdd compound slide llithryn cyfansawdd compound slides llithryn cyfansawdd compound stain staen cyfansawdd compound stains staen cyfansawdd compound train trên cyfansawdd compound trains trên cyfansawdd compound wound dirwyniad cyfansawdd compound wounds dirwyniad cyfansawdd compounding vectors cyfuno fectorau compounds cyfansoddyn comprehensibility eglurder comprehension dealltwriaeth comprehension test prawf darllen a deall comprehension tests prawf darllen a deall comprehensions dealltwriaeth comprehensive cynhwysfawr (=all-inclusive) comprehensive education addysg gyfun comprehensive educations addysg gyfun comprehensive insurance yswiriant cyfun comprehensive insurances yswiriant cyfun comprehensive school ysgol gyfun comprehensive schools ysgol gyfun comprehensive training programme rhaglen hyfforddi gynhwysfawr comprehensive training programmes rhaglen hyfforddi gynhwysfawr compress cywasgu compressed cywasgedig compressed air aer cywasgedig compressed airs aer cywasgedig compressibility cywasgadwyedd compressible cywasgadwy compression cywasgedd (=reduction in volume) compression cywasgiad (action of) compression moulding mowldin cywasgedd compression mouldings mowldin cywasgedd compression spring sbring cywasgu compression springs sbring cywasgu compressions cywasgedd (=reduction in volume) compressions cywasgiad (action of) compressive cywasgol compressive force grym cywasgol compressive forces grym cywasgol compressives cywasgol compressor cywasgydd compressors cywasgydd compromise cyfaddawd compromise of Avranches cyfaddawd Avranches compromises cyfaddawd comptroller distain comptrollers distain compulsion gorfodaeth compulsions gorfodaeth compulsory gorfodol compulsory count cownt gorfod compulsory counts cownt gorfod compulsory education addysg orfodol compulsory educations addysg orfodol compulsory purchase order gorchymyn prynu gorfodol compulsory purchase orders gorchymyn prynu gorfodol compulsory subject pwnc gorfodol compulsory subjects pwnc gorfodol computation cyfrifiant computational method dull cyfrifiannu computational methods dull cyfrifiannu computations cyfrifiant compute cyfrifiannu computer cyfrifiadur computer cyfrifiadurol computer aided design cynllunio drwy gymorth cyfrifiadur (CAD) computer aided education addysg drwy gymorth cyfrifiadur (CAE) computer aided educations addysg drwy gymorth cyfrifiadur (CAE) computer aided instruction hyfforddiant drwy gymorth cyfrifiadur (CAI) computer aided instructions hyfforddiant drwy gymorth cyfrifiadur (CAI) computer aided learning dysgu drwy gymorth cyfrifiadur (CAL) computer aided manufacture gweithgynhyrchu drwy gymorth cyfrifiadur (CAM) computer aided production management rheoli cynhyrchu drwy gymorth cyfrifiadur (CAPM) computer application rhaglen gyfrifiadurol computer applications rhaglen gyfrifiadurol computer architecture saernïaeth gyfrifiadurol computer architectures saernïaeth gyfrifiadurol computer based method dull cyfrifiadurol computer based methods dull cyfrifiadurol computer control rheolaeth gyfrifiadurol computer controls rheolaeth gyfrifiadurol computer game gêm cyfrifiadur computer games gêm cyfrifiadur computer graphics graffigwaith cyfrifiadurol computer interface rhyngwyneb cyfrifiadurol computer interfaces rhyngwyneb cyfrifiadurol computer literacy llythrennedd cyfrifiadurol computer managed learning dysgu dan arweiniad cyfrifiadur (CML) computer model model cyfrifiadurol computer modelling modelu cyfrifiadurol computer models model cyfrifiadurol computer music cerddoriaeth gyfrifiadur computer musics cerddoriaeth gyfrifiadur computer network rhwydwaith cyfrifiadurol computer networks rhwydwaith cyfrifiadurol computer operator cyfrifiadurwr computer operators cyfrifiadurwr computer output to microfilm microffilm o gyfrifiadur (COM) computer personnel personél cyfrifiadur computer personnels personél cyfrifiadur computer printout allbrint cyfrifiadurol computer printouts allbrint cyfrifiadurol computer readable darllenadwy i gyfrifiadur computer science cyfrifiadureg computer sciences cyfrifiadureg computer scientist cyfrifiadurwr computer scientists cyfrifiadurwr computer simulation efelychiad cyfrifiadurol computer simulations efelychiad cyfrifiadurol computer solution ateb cyfrifiadurol computer solutions ateb cyfrifiadurol computer spreadsheet taenlen gyfrifiadurol computer spreadsheets taenlen gyfrifiadurol computer studies astudiaethau cyfrifiadur computer system system gyfrifiadurol computer systems system gyfrifiadurol computer user defnyddiwr cyfrifiadur computer users defnyddiwr cyfrifiadur computer workstation gweithfan cyfrifiadur computer workstations gweithfan cyfrifiadur computer-controlled a reolir gan gyfrifiadur computer-marked assignment aseiniad a fercir â chyfrifiadur (CMA) computer-marked assignments aseiniad a fercir â chyfrifiadur (CMA) computerize cyfrifiaduro computerized cyfrifiadurol computerized booking system system archebu gyfrifiadurol computerized booking systems system archebu gyfrifiadurol computerized food ordering system archebu bwyd gyfrifiadurol computerized food orderings system archebu bwyd gyfrifiadurol computers cyfrifiadur computing cyfrifiadura comrade cymrawd comrades cymrawd con sordino con sordino conation ymdrechiad conations ymdrechiad conative ymdrechol concatenate cydgadwyno concatenation cydgadwynedd concatenations cydgadwynedd concave ceugrwm concave curvature ceugrymedd concave curvatures ceugrymedd concave curve cromlin geugrwm concave curves cromlin geugrwm concave lens lens ceugrwm concave milling cutter melinwr ceugrwm concave milling cutters melinwr ceugrwm concave slope llethr ceugrwm concave slopes llethr ceugrwm concave surface arwyneb ceugrwm concave surfaces arwyneb ceugrwm concavity ceugrymedd conceal cuddio concealed cudd concealed coalfield maes glo cudd concealed coalfields maes glo cudd concealed lighting golau cudd concealed lightings golau cudd concealed opening agoriad cudd concealed openings agoriad cudd conceive beichiogi (=become pregnant) conceive cenhedlu (a child) concentrate canolbwyntio (mind) concentrate crynodi (in chemistry) concentrate dwysáu (sauce) concentrated crynodedig (in chemistry) concentrated acid asid crynodedig concentrated acids asid crynodedig concentration crynodiad (in chemistry) concentration camp gwersyll crynhoi concentration camps gwersyll crynhoi concentration gradient graddiant crynodiad concentration gradients graddiant crynodiad concentrations crynodiad (in chemistry) concentric cydganol concentric circles cylchoedd cydganol concept cysyniad concept keyboard cyffyrddell concept keyboards cyffyrddell concept of capacitance cysyniad cynhwysiant concept of god cysyniad o dduw concept sorting test prawf cysyniadau concept sorting tests prawf cysyniadau conceptacle conseptagl conceptacles conseptagl conception cenhedliad (of a child) conceptions cenhedliad (of a child) concepts cysyniad concepts of leisure cysyniadau hamdden conceptual cysyniadol conceptual development datblygiad cysyniadol conceptual developments datblygiad cysyniadol conceptual framework fframwaith cysyniadol conceptual frameworks fframwaith cysyniadol conceptual understanding dealltwriaeth gysyniadol conceptual understandings dealltwriaeth gysyniadol concert cyngerdd concert harp telyn gyngerdd concert harps telyn gyngerdd concert overture agorawd cyngerdd concert overtures agorawd cyngerdd concert pitch traw cyngerdd concert pitches traw cyngerdd concertante concertante concertantes concertante concertina consertina concertinas consertina concertino concertino concerto concerto concerto grosso concerto grosso concerts cyngerdd concession consesiwn concessions consesiwn conchoid concoid conchoidal concoidaidd conchoids concoid conciliar cynghoraidd conciliation cymodi concise cryno conclave cymanfa conclave of cardinals cymanfa'r cardinaliaid conclaves cymanfa conclusion casgliad conclusions casgliad concomitant cydredol concord cytgord (=harmony) concord cytundeb (=treaty) concordant cydgordiol concordat concordat concordats concordat concords cytgord (=harmony) concords cytundeb (=treaty) concrete concrit concrete diriaethol concrete aggregates agregau concrit concrete art celfyddyd ddiriaethol concrete arts celfyddyd ddiriaethol concrete foundation sylfaen goncrit concrete foundations sylfaen goncrit concrete music cerddoriaeth ddiriaethol concrete musics cerddoriaeth ddiriaethol concrete operational stage stad weithredu ddiriaethol concrete operational stages stad weithredu ddiriaethol concrete operational thought meddwl gweithredu diriaethol concrete operational thoughts meddwl gweithredu diriaethol concrete pad pad concrit concrete pads pad concrit concretes concrit concretion concretiad concretions concretiad concretization diriaetholi concubinage gordderchaeth concubinages gordderchaeth concubine gordderch concubines gordderch concur cydgroesi (in mathematics) concurrent cydamserol concurrent cyfamserol (processes) concurrent cytgroes (lines etc) concyclic cydgylchol condensation cyddwysiad (in science) condensation centre canolfan cyddwysiad condensation centres canolfan cyddwysiad condensation polymer polymer cyddwyso condensation polymers polymer cyddwyso condensation reaction adwaith cyddwyso condensation reactions adwaith cyddwyso condensations cyddwysiad (in science) condense cyddwyso condensed cyddwysedig condensed milk llaeth cyddwysedig condensed milks llaeth cyddwysedig condenser cyddwysydd (distilling in chemistry) condenser cynhwysydd (=capacitor) condenser lens lens cyddwyso condensers cyddwysydd (distilling in chemistry) condensers cynhwysydd (=capacitor) condiments pupur a halen condition amod (=stipulation etc) condition cyflwr (=state) condition code cod cyflwr condition codes cod cyflwr condition of sale amod gwerthu condition of service amod gwasanaeth condition survey arolwg cyflwr conditional amodol conditional branch instruction cyfarwyddyd canghennu amodol conditional branch instructions cyfarwyddyd canghennu amodol conditional fee ffi amodol conditional fee arrangements trefniadau ffioedd amodol conditional fees ffi amodol conditional jump naid amodol conditional jumps naid amodol conditional probability tebygolrwydd amodol conditional transfer trosglwyddiad amodol conditional transfers trosglwyddiad amodol conditioned cyflyredig (as of reflex) conditioned reflex atgyrch cyflyredig conditioned reflexes atgyrch cyflyredig conditioner cyflyrydd conditioners cyflyrydd conditioning cyflyru conditions amod (=stipulation etc) conditions cyflwr (=state) conditions of trading amodau masnach condom condom condominium condominiwm (of building) condominium cydlywodraeth (joint control of a State's affairs by other States) condominiums condominiwm (of building) condominiums cydlywodraeth (joint control of a State's affairs by other States) condoms condom conduct arwain (=lead) conduct cynnal (an experiment) conduct dargludo (=transmit by conduction) conduct ymddygiad (=behaviour) conductance dargludiant conductances dargludiant conducting dargludol conduction dargludiad conductions dargludiad conductive hearing loss colli clyw yn y glust ganol conductivity dargludedd conductor arweinydd (of orchestra) conductor dargludydd (of electricity) conductor of heat dargludydd gwres conductors arweinydd (of orchestra) conductors dargludydd (of electricity) conducts ymddygiad (=behaviour) conduit cwndid conduits cwndid condyle condyl condyles condyl cone côn cone pigwrn (of the eye) cone centre canol côn cone centres canol côn cone pat pat côn cone pats pat côn cone pulley pwli côn cone stand ateg gôn cone stands ateg gôn cones côn cones pigwrn (of the eye) confectionery melysion confederate state talaith gydffederal (US) confederate states talaith gydffederal (US) confederation cydffederasiwn confederations cydffederasiwn confer ymgynghori conference cynhadledd conferences cynhadledd confess cyffesu confession cyfaddefiad (=admission of guilt) confession cyffes (in general) confession of faith cyffes ffydd confessional cyffesgell confessionals cyffesgell confessions cyfaddefiad (=admission of guilt) confessions cyffes (in general) confessor cyffeswr confessors cyffeswr confidence hyder confidence in water hyder mewn dŵr confidence interval cyfwng hyder confidence intervals cyfwng hyder confidence limit ffin hyder confidence limits ffin hyder confidences hyder confidential cyfrinachol confidential information gwybodaeth gyfrinachol confidential informations gwybodaeth gyfrinachol confidential record cofnod cyfrinachol confidential records cofnod cyfrinachol confidentiality cyfrinachedd configure ffurfweddu confinement cyfnod geni confinements cyfnod geni confirm cadarnhau confirmation bedydd esgob (in church) confirmation cadarnhad (=establish more fully) confirmations bedydd esgob (in church) confirmations cadarnhad (=establish more fully) conflict gwrthdaro conflicting demands gofynion sy'n gwrthdaro confluence cydlifiad confluences cydlifiad confocal cydffocal conformable cydffurfiadwy conformable beds haenau cydffurfiadwy conformal cydffurf conformal mapping mapio cydffurfiol conformation cydffurfiad conformational cydffurfiol conformational analysis dadansoddiad cydffurfiol conformations cydffurfiad conforming bandage rhwymyn cydffurfiol conforming bandages rhwymyn cydffurfiol conforming shape function ffwythiant siâp cydffurfiol conforming shape functions ffwythiant siâp cydffurfiol confrontation gwrthdaro confuse cymysgu confuse drysu confused drainage draeniad dryslyd confused drainages draeniad dryslyd conga conga congas conga congeliturbate rhewdyrfiad congeliturbates rhewdyrfiad congeliturbation rhewdyrfiad congeliturbations rhewdyrfiad congenital malformation camffurfiad cynhenid congenital malformations camffurfiad cynhenid conger eel congren conger eels congren congest gordyrru congested gordyrrog congestion gorlenwad (of blood, mucus etc) congestion tagfa (of traffic) congestions gorlenwad (of blood, mucus etc) congestions tagfa (of traffic) conglomerate clymfaen (in geology) conglomerate cyd-dyrru conglomerate uwchgwmni (of company, organization) conglomerates clymfaen (in geology) conglomerates uwchgwmni (of company, organization) conglomeration crugiad (in geology) conglomeration cyd-dyriad (in commerce) conglomerations crugiad (in geology) conglomerations cyd-dyriad (in commerce) congregation cynulleidfa congregations cynulleidfa congress cyngres congressional cyngresol congruence cyfathiant congruences cyfathiant congruent cyfath congruent triangles trionglau cyfath conic conig conic section trychiad conig conic sections trychiad conig conical conigol conical flask fflasg gonigol conical flasks fflasg gonigol conical head rivet rhybed pen côn conical head rivets rhybed pen côn conical projection tafluniad conigol conical projections tafluniad conigol conicoid conicoid conicoids conicoid conifer conwydden coniferous forest coedwig gonwydd coniferous forests coedwig gonwydd coniferous tree conwydden coniferous trees conwydden conifers conwydden conjecture dyfaliad conjectures dyfaliad conjugate cyfiau conjugate cyfuno conjugate pair pâr cyfiau conjugate pairs pâr cyfiau conjugate point pwynt cyfiau conjugate points pwynt cyfiau conjugated cyfunedig conjugates cyfiau conjugation cyfunedd (in science) conjugations cyfunedd (in science) conjunct motion symud gam a cham conjunctiva cyfbilen (of eye) conjunctivas cyfbilen (of eye) conjunctivitis llid y gyfbilen connect cysylltu connected cysylltiedig connecting rod rhoden gyswllt connecting rods rhoden gyswllt connection cysylltiad connections cysylltiad connective cyswllt connective cysylltyn connective tissue meinwe gyswllt connective tissues meinwe gyswllt connectives cysylltyn connectivity cysylltedd connector cysylltydd connectors cysylltydd connotation arwyddocâd connotations arwyddocâd conoid conoid conoids conoid conqueror gorchfygwr conquerors gorchfygwr conquest concwest conquests concwest consciousness ymwybyddiaeth consciousness-raising codi ymwybyddiaeth conscription consgripsiwn conscriptions consgripsiwn consecrate cysegru consecrated cysegredig consecrated wafer afrlladen consecrated wafers afrlladen consecration cysegriad consecrations cysegriad consecutive dilynol consecutive fifths and octaves pumedau ac wythfedau dilynol consecutive revolutions cylchdroeon dilynol consecutives dilynolion consensus consensws consent cydsyniad consent form ffurflen gydsynio consent forms ffurflen gydsynio consents cydsyniad consequence canlyniad consequences canlyniad consequent canlyniad (in canon) consequent canlynol consequent cydlif (stream) consequent stream ffrwd gydlif consequent streams ffrwd gydlif consequentialism canlyniadaeth consequentialisms canlyniadaeth consequents canlyniad (in canon) consequents cydlif (stream) conservation cadwraeth (of mass, energy, momentum) conservation area ardal gadwraeth conservation areas ardal gadwraeth conservation of charge cadwraeth gwefr conservation of energy cadwraeth egni conservation of momentum cadwraeth momentwm conservation of number cadwraeth rhif conservation officer swyddog cadwraeth (of person) conservation officers swyddog cadwraeth (of person) conservations cadwraeth (of mass, energy, momentum) conservatism ceidwadaeth conservatisms ceidwadaeth conservative cadwrol (in scientific usage) conservative ceidwadol (in social and political usage) conservative ceidwadwr conservative field of force maes cadwrol grym conservative replication dyblygiad cadwrol conservative replications dyblygiad cadwrol conservative treatment triniaeth geidwadol conservative treatments triniaeth geidwadol conservatives ceidwadwr conservatoire conservatoire conservatoires conservatoire conserve cyffrwyth meddal (=fruit preserve) conserve cynilo (=not waste) conserve gwarchod (=keep from damage) conserves cyffrwyth meddal (=fruit preserve) consider ystyried consideration ystyriaeth considerations ystyriaeth consignment llwyth consignments llwyth consistency ansawdd (=degree of density) consistency cysondeb (=state of being constant) consistent cyson consistent performance perfformio cyson consistorial consistoraidd consistory consistori console consol console light lamp gonsol console lights lamp gonsol console log log consol console logs log consol console switch switsh consol console switches switsh consol console typewriter teipiadur consol console typewriters teipiadur consol consoles consol consolidate cyfnerthu consolidate skills cyfnerthu medrau consolidated cyfnerthedig consolidated fund prif gronfa wladol consolidated funds prif gronfa wladol consommé consommé consommés consommé consonance cyseinedd consonances cyseinedd consonant interval cyfwng cyseiniol consonant intervals cyfwng cyseiniol consort consort (in music) consort cydweddog (=wife or husband, especially of royalty) consort of viols consort feiolau consortium consortiwm consortiums consortiwm consorts consort (in music) consorts cydweddog (=wife or husband, especially of royalty) conspiracy cynllwyn conspire cynllwynio constable cwnstabl constables cwnstabl constancy sefydlogrwydd constancy of colour unffurfiaeth lliw constancy of shape unffurfiaeth siâp constant cyson constant cysonyn constant acceleration cyflymiad cyson constant accelerations cyflymiad cyson constant boiling mixture cymysgedd pwynt berwi cyson constant boiling mixtures cymysgedd pwynt berwi cyson constant of proportionality cysonyn cyfrannol constant pressure gwasgedd cyson constant pressures gwasgedd cyson constant ratio curve cromlin cymhareb gyson constant ratio curves cromlin cymhareb gyson constant slope llethr cyson constant slopes llethr cyson constant temperature tymheredd cyson constant temperatures tymheredd cyson constant velocity cyflymder cyson constants cysonyn constellation clwstwr (=group of persons, ideas etc) constellation cytser (of stars) constellation of towns clwstwr o drefi constellations clwstwr (=group of persons, ideas etc) constellations cytser (of stars) constipated rhwym constipation rhwymedd constipations rhwymedd constituent ansoddyn (chemical) constituent cyfansoddyn (of nucleus) constituent assembly cynulliad cyfansoddol constituent element elfen ansoddol constituent elements elfen ansoddol constituent group grŵp cyfansoddol constituent groups grŵp cyfansoddol constituents ansoddyn (chemical) constituents cyfansoddyn (of nucleus) constitution cyfansoddiad constitutional cyfansoddiadol constitutional history hanes cyfansoddiadol constitutionalism cyfansoddiaeth constitutionalisms cyfansoddiaeth constitutions cyfansoddiad constrain gorfodi (=bring about by compulsion) constrained motion mudiant cyfyngedig constrained motions mudiant cyfyngedig constrained to move horizontally wedi'i gorfodi i symud yn llorweddol (with feminine nouns) constrained to move horizontally wedi'i orfodi i symud yn llorweddol (with masculine nouns) constrained to move vertically wedi'i gorfodi i symud yn fertigol (with feminine nouns) constrained to move vertically wedi'i orfodi i symud yn fertigol (with masculine nouns) constraint cyfyngiad (in economics) constraint cyfyngydd (in physics) constraints cyfyngiad (in economics) constraints cyfyngydd (in physics) constrict darwasgu constricted darwasgedig constriction darwasgiad constrictions darwasgiad construct lluniad (of the mind etc) construct llunio (=form, create) construct shapes llunio siapiau constructed estuary moryd wneud constructing an ellipse llunio elips construction adeiladwaith (of frame / building) construction lluniad (of abstract / geometrical) construction craft crefft adeiladu construction crafts crefft adeiladu construction drawing lluniad adeiladu construction drawings lluniad adeiladu construction line llinell lunio construction lines llinell lunio construction paper papur adeiladwaith construction papers papur adeiladwaith construction technology technoleg adeiladu constructional toy tegan adeiladu constructions adeiladwaith (of frame / building) constructions lluniad (of abstract / geometrical) constructive adeiladol constructive interference ymyriant adeiladol constructive interferences ymyriant adeiladol constructive plate margins ymylon platiau adeiladol constructive wave ton adeiladol constructive waves ton adeiladol constructivism adeileddiaeth (in mathematics, art) constructivisms adeileddiaeth (in mathematics, art) constructivist adeileddol (in mathematics, art) constructivist adeileddwr (in mathematics, art) constructivists adeileddwr (in mathematics, art) constructs lluniad (of the mind etc) consubstantiation cydsylweddiad consubstantiations cydsylweddiad consul conswl consulate conswliaeth (in ancient Rome) consulate swyddfa is-gennad (modern) consulates conswliaeth (in ancient Rome) consulates swyddfa is-gennad (modern) consuls conswl consultancy ymgynghoriaeth consultant ymgynghorol consultant ymgynghorydd consultants ymgynghorydd consumables defnyddiau traul consumer defnyddiwr (=person who uses a product) consumer ysydd (=fire, bacteria, predator etc that consume) consumer boom ffyniant defnyddwyr consumer booms ffyniant defnyddwyr consumer conglomerate cyd-dyriad defnyddwyr consumer conglomerates cyd-dyriad defnyddwyr consumer education addysg defnyddwyr consumer educations addysg defnyddwyr consumer expenditure gwariant defnyddwyr consumer expenditures gwariant defnyddwyr consumer goods nwyddau traul consumer industry diwydiant nwyddau traul consumer market marchnad defnyddwyr consumer markets marchnad defnyddwyr consumer rights hawliau defnyddwyr consumer sovereignty sofraniaeth defnyddwyr consumer spending gwariant defnyddwyr consumer spendings gwariant defnyddwyr consumer surplus gwarged defnyddwyr consumers defnyddiwr (=person who uses a product) consumers ysydd (=fire, bacteria, predator etc that consume) consumption cymeriant (of food) consumption darfodedigaeth (medical condition) consumption treuliant (of goods) consumptions cymeriant (of food) consumptions darfodedigaeth (medical condition) consumptions treuliant (of goods) contact cyffyrddiad (=physical touch) contact cyswllt (=communication or meeting) contact cysylltu contact adhesive gludydd cyswllt contact adhesives gludydd cyswllt contact bounce adlam y cysylltau contact bounces adlam y cysylltau contact breaker cyswllt-dorrwr contact breakers cyswllt-dorrwr contact force grym cyffwrdd contact forces grym cyffwrdd contact glue glud cyswllt contact glues glud cyswllt contact grill gridyll cyswllt contact grills gridyll cyswllt contact hours oriau cyswllt contact line llinell gyswllt contact lines llinell gyswllt contact mike meic cyswllt contact mikes meic cyswllt contact process proses gyffwrdd contact push gwthiad cyffwrdd contact pushs gwthiad cyffwrdd contact sounds seiniau cyffwrdd contact time amser cyswllt contact times amser cyswllt contact zone cylchfa gyswllt contact zones cylchfa gyswllt contacts cyffyrddiad (=physical touch) contacts cyswllt (=communication or meeting) contagious cyffwrdd-ymledol contagious disease clefyd cyffwrdd-ymledol contagious diseases clefyd cyffwrdd-ymledol contain cynnwys container cynhwysydd container depot depo amlwytho container depots depo amlwytho containerization amlwythiant containerizations amlwythiant containers cynhwysydd containment cyfyngiant containments cyfyngiant contaminate halogi contamination halogiad contaminations halogiad contemporary cyfoes contemporary cyfoeswr contemporary art celfyddyd gyfoes contemporary arts celfyddyd gyfoes contemporary design cynllun cyfoes (of specific examples) contemporary design cynllunio cyfoes (as a genre) contemporary designs cynllun cyfoes (of specific examples) contemporary society cymdeithas gyfoes contemporary style arddull cyfoes contemporary styles arddull cyfoes contempt of court dirmyg llys contender cystadleuydd contenders cystadleuydd content bodlon content cynnwys content addressable file store storfa ffeiliau gynnwys-gyfeiriedig (CAFS) content addressable file stores storfa ffeiliau gynnwys-gyfeiriedig (CAFS) content analysis dadansoddi cynnwys content of science cynnwys gwyddoniaeth content-free penagored contention ymryson contentions ymryson contentious cynhennus contents cynnwys contents of paint cynhwysion paent contest cystadleuaeth contest gornest (boxing etc) contests cystadleuaeth contests gornest (boxing etc) context cyd-destun contexts cyd-destun contextual issue mater cyd-destunol contextual issues mater cyd-destunol contextual study astudiaeth gyd-destunol contiguity cyfagosrwydd continent cyfandir continental Europe cyfandir Ewrop continental drift drifft cyfandirol continental drifts drifft cyfandirol continental powers pwerau cyfandirol continental shelf sgafell gyfandirol continental shelfs sgafell gyfandirol continentality cyfandiroledd continents cyfandir contingency amodoldeb (in psychology etc) contingency plan cynllun wrth gefn contingency plans cynllun wrth gefn continuation parhad continuations parhad continue parhau continuing education addysg barhaus continuing educations addysg barhaus continuity parhad continuity of care dilyniant mewn gofal continuo continuo continuous di-dor (=unbroken) continuous assessment asesu parhaus continuous creation creu parhaus continuous curve cromlin ddi-dor continuous curves cromlin ddi-dor continuous data data di-dor continuous distribution dosraniad di-dor continuous distributions dosraniad di-dor continuous fibre ffibr di-dor continuous fibres ffibr di-dor continuous free curve cromlin rydd ddi-dor continuous free curves cromlin rydd ddi-dor continuous guidance arweiniad parhaus continuous guidances arweiniad parhaus continuous infusion arllwysiad parhaus (of action) continuous infusion trwyth parhaus (of liquid) continuous infusions arllwysiad parhaus (of action) continuous infusions trwyth parhaus (of liquid) continuous lap agoriad di-dor continuous laps agoriad di-dor continuous line llinell ddi-dor continuous lines llinell ddi-dor continuous random variable hapnewidyn di-dor continuous random variables hapnewidyn di-dor continuous smooth curve cromlin lefn ddi-dor continuous smooth curves cromlin lefn ddi-dor continuous spectrum sbectrwm di-dor continuous spectrums sbectrwm di-dor continuous stationery papur di-dor continuous stream ffrwd ddi-dor continuous streams ffrwd ddi-dor continuous strip mill melin strip ddi-dor continuous strip mills melin strip ddi-dor continuous variable newidyn di-dor continuous variables newidyn di-dor continuous yarn edafedd di-dor continuum continwwm continuums continwwm contour amlin (in mathematics) contour amlinell (=outline) contour cyfuchlinedd (in geography) contour interval cyfwng cyfuchlinol contour intervals cyfwng cyfuchlinol contour line cyfuchlin contour lines cyfuchlin contour map map cyfuchlinol contour maps map cyfuchlinol contour plan cynllun cyfuchlin contour plans cynllun cyfuchlin contours amlin (in mathematics) contours amlinell (=outline) contours cyfuchlinedd (in geography) contra bass bas dwbl contra bass player canwr bas dwbl contra bass players canwr bas dwbl contra bassoon basŵn dwbl contra bassoonist canwr basŵn dwbl contra bassoonists canwr basŵn dwbl contra bassoons basŵn dwbl contra-indication gwrthrybudd contra-indications gwrthrybudd contraception atal cenhedlu contraceptive device cyfarpar atal cenhedlu contraceptive devices cyfarpar atal cenhedlu contract contract (=agreement) contract crebachu (=draw together) contract cyfangu (=become smaller) contract costing costio contractau contracted out wedi'i chontractio allan (with feminine nouns) contracted out wedi'i gontractio allan (with masculine nouns) contractile cyfangol contractile root gwreiddyn cyfangol contractile roots gwreiddyn cyfangol contractile vacuole gwagolyn cyfangol contractile vacuoles gwagolyn cyfangol contractiles cyfangol contracting industry diwydiant enciliol contraction cyfangiad contraction pattern patrwm cyfangiad contraction patterns patrwm cyfangiad contraction rule riwl gyfangiad contraction rules riwl gyfangiad contractions cyfangiad contractor contractwr contractors contractwr contracts contract (=agreement) contracts of adhesion contractau ymlyniad contradiction gwrthddywediad contradictions gwrthddywediad contralto contralto contrapuntal gwrthbwyntiol contrapuntalist gwrthbwyntydd contrapuntalists gwrthbwyntydd contrary cyferbyn contrary motion gwrthsymudiad contrary motions gwrthsymudiad contrast cyferbyniad contrast cyferbynnu contrast of continuity cyferbyniad parhad contrast of level cyferbyniad lefel contrast of shape cyferbyniad siâp contrast of size cyferbyniad maint contrast of tension cyferbyniad tyndra contrasted characteristics nodweddion cyferbyniol contrasting cyferbyniol contrasting colour lliw cyferbyniol contrasting colours lliw cyferbyniol contrasting locality ardal gyferbyniol contrasting stimuli ysgogiadau cyferbyniol contrasting wood pren cyferbyniol contrasting woods pren cyferbyniol contrasts cyferbyniad contravening croes contribute cyfrannu contribution cyfraniad contributions cyfraniad contributory pension pensiwn cyfrannol contributory pensions pensiwn cyfrannol control cadw trefn (a class etc) control rheolaeth (=management) control rheoli (=manage) control rheolydd (in control experiment) control card cerdyn rheoli control cards cerdyn rheoli control character nod rheoli control characters nod rheoli control code cod rheoli control codes cod rheoli control description disgrifiad o'r rheolfan control descriptions disgrifiad o'r rheolfan control device dyfais reoli control devices dyfais reoli control experiment arbrawf cymharu control experiments arbrawf cymharu control floods rheoli llifogydd control injection pigiad rheoledig control injections pigiad rheoledig control investigation ymchwiliad rheoli control investigations ymchwiliad rheoli control key bysell reoli control marker marciwr rheoli control markers marciwr rheoli control measure mesur rheoli control measurement mesuriad rheoli control measurements mesuriad rheoli control measures mesur rheoli control memory cof rheoli control of equipment rheoli offer control of fullness rheoli llawnder control point rheolfan control points rheolfan control program rhaglen reoli control programs rhaglen reoli control rod rhoden reoli control rods rhoden reoli control setting rheolydd control settings rheolydd control shoot cyffyn cymharu control shoots cyffyn cymharu control switch switsh rheoli control switches switsh rheoli control system system reoli control systems system reoli control technique techneg reoli control techniques techneg reoli control technology technoleg reoli control the ball rheoli'r bêl control theory damcaniaeth reoli control unit uned reoli control units uned reoli controlled drug cyffur rheoledig controlled drugs cyffur rheoledig controlled grazing pori rheoledig controlled reading darllen dan oruchwyliaeth controlled readings darllen dan oruchwyliaeth controlled test prawf dan oruchwyliaeth controlled tests prawf dan oruchwyliaeth controller rheolydd (=regulator) controllers rheolydd (=regulator) controls rheolaeth (=management) controls rheolydd (in control experiment) conurbation cytref conurbations cytref conus arteriosus conws arteriosws convalesce gwella convalescence cyfnod gwella convalescences cyfnod gwella convalescent diet deiet gwella convalescent diets deiet gwella convection darfudiad convectional darfudol convectional rain glaw darfudol convectional rains glaw darfudol convections darfudiad convector drier sychydd darfudol convector driers sychydd darfudol convector heater gwresogydd darfudol convector heaters gwresogydd darfudol convener cynullydd conveners cynullydd convenience food bwyd cyfleus convenience foods bwyd cyfleus convenience goods nwyddau cyfleus convenient cyfleus convent lleiandy conventicle confentigl conventicles confentigl convention confensiwn (=customary practice) convention cynulliad (=assembly) conventional confensiynol conventional art celfyddyd gonfensiynol conventional arts celfyddyd gonfensiynol conventional feed porthiant confensiynol conventional feeds porthiant confensiynol conventional isometric projection tafluniad isometrig confensiynol conventional isometric projections tafluniad isometrig confensiynol conventional joint uniad confensiynol conventional joints uniad confensiynol conventional mathematical notation nodiant mathemategol confensiynol conventional mathematical notations nodiant mathemategol confensiynol conventional method dull confensiynol conventional methods dull confensiynol conventional milling melino confensiynol (up-cut) conventional notation nodiant confensiynol conventional notations nodiant confensiynol conventional sign arwydd confensiynol conventional signs arwydd confensiynol conventional symbol symbol confensiynol conventional symbols symbol confensiynol conventions confensiwn (=customary practice) conventions cynulliad (=assembly) conventions of fair play confensiynau chwarae teg convents lleiandy conventual cwfeiniad conventual cwfeiniol conventuals cwfeiniad converge cydgyfeirio convergence cydgyfeiriant convergence in distribution cydgyfeiriant o ran dosraniad convergence in probability cydgyfeiriant o ran tebygolrwydd convergence in quadratic mean cydgyfeiriant o ran cymedr cwadratig convergence limit terfan cydgyfeiriant convergence limits terfan cydgyfeiriant convergences cydgyfeiriant convergent cydgyfeiriol convergent question cwestiwn cydgyfeiriol convergent questions cwestiwn cydgyfeiriol convergent series cyfres gydgyfeiriol converging electron lens lens electron cydgyfeiriol converging lens lens cydgyfeiriol converging point pwynt cydgyfeiriol converging points pwynt cydgyfeiriol conversation sgwrs conversation piece darlun ymddiddan (of painting) conversation pieces darlun ymddiddan (of painting) conversational system system sgyrsiol conversational systems system sgyrsiol conversations sgwrs converse cyfdro converse theorem theorem gyfdro converse theorems theorem gyfdro converses cyfdro conversi brodyr lleyg conversion trawsnewidiad (in science) conversion trosiad (timber) conversion tröedigaeth (in religion) conversion graph graff trawsnewid conversion graphs graff trawsnewid conversion of energy trawsnewidiad ynni conversion table tabl trawsnewid conversion tables tabl trawsnewid conversions trawsnewidiad (in science) conversions trosiad (timber) conversions tröedigaeth (in religion) convert trawsnewid (in science) convert trosi (a try) converted try trosgais converter trawsnewidydd (e.g. Bessemer) converters trawsnewidydd (e.g. Bessemer) convex amgrwm convex curvature amgrymedd convex curvatures amgrymedd convex curve cromlin amgrwm convex curves cromlin amgrwm convex face wyneb amgrwm convex faces wyneb amgrwm convex hull hwl amgrwm convex hulls hwl amgrwm convex lens lens amgrwm convex slope llethr amgrwm convex slopes llethr amgrwm convexity amgrymedd convey cludo (=carry) convey trosglwyddo (=transfer legal title) conveyance cludiant (=transport) conveyance trosglwyddiad (of legal title) conveyance deed trawsgludiad conveyance deeds trawsgludiad conveyancer trawsgludwr conveyancers trawsgludwr conveyances cludiant (=transport) conveyances trosglwyddiad (of legal title) conveyancing trawsgludo conveyor cludydd conveyor belt cludfelt conveyor belts cludfelt conveyors cludydd convocation confocasiwn convocations confocasiwn convolution ffaltwng (=faltung) convolutions ffaltwng (=faltung) convoy cymdaith convulsion confylsiwn (medical) convulsion dirgryniad (in earthquake) convulsions confylsiwn (medical) convulsions dirgryniad (in earthquake) cook coginio cooker popty cooker hood lwfer popty cooker hoods lwfer popty cooker range popty estynedig cooker ranges popty estynedig cooker ring alch cooker rings alch cookers popty cooking apple afal coginio cooking apples afal coginio cool claear (of iron setting, weather) cool claearu (of weather) cool oer (=cold) cool oeri (in general) cool colour lliw oeraidd cool colours lliw oeraidd cool iron haearn claear cool irons haearn claear cool temperate tymherus claear cool temperate zone cylchfa dymherus glaear cool temperate zones cylchfa dymherus glaear coolant oerydd coolants oerydd cooling fan gwyntyll oeri cooling fans gwyntyll oeri cooling media cyfryngau oeri cooling system system oeri cooling systems system oeri cooling tank tanc oeri cooling tanks tanc oeri coombe rock cwmgraig coombe rocks cwmgraig cooper cowper cooper jointing uniadu cylchwr cooperate cydweithredu cooperation cydweithrediad cooperations cydweithrediad cooperative cydweithredol coopers cowper coordinate cyd-drefnol (of covalent bond) coordinate cyd-drefnu (of covalent bond) coordinate cydgysylltu (in administration) coordinate cydweddu (fashion items) coordinate cydweddyn (fashion items) coordinate cyfesuryn (in order to fix a position) coordinate axes echelinau cyfesurynnol coordinate bond bond cyd-drefnol coordinate bonds bond cyd-drefnol coordinate geometry geometreg gyfesurynnol coordinate system system gyfesurynnol coordinate systems system gyfesurynnol coordinated provision cyd-ddarpariaeth coordinated provisions cyd-ddarpariaeth coordinated separates amrywion cydwedd coordinates cydweddyn (fashion items) coordinates cyfesuryn (in order to fix a position) coordinating power gallu cyd-drefnu coordinating powers gallu cyd-drefnu coordination cyd-drefniant (of covalent bond) coordination cydgysylltu (in administration) coordination cydsymud (of movements) coordination number rhif cyd-drefnol coordination numbers rhif cyd-drefnol coordinations cyd-drefniant (of covalent bond) coordinator cydgysylltwr coordinators cydgysylltwr copal varnish farnais copal copal varnishs farnais copal cope copa (in metalwork) cope ymdopi cope and drag copa a drag copes copa (in metalwork) copier copïwr copiers copïwr coping copin (of wall) coping saw llif fwa fach coping saws llif fwa fach coping skills sgiliau ymdopi coping stone carreg gopa coping stones carreg gopa copings copin (of wall) coplanar cymhlan coplanar forces grymoedd cymhlan copper copr (Cu) copper atom atom copr copper atoms atom copr copper blank blanc copr copper blanks blanc copr copper brown brown copr copper browns brown copr copper filings naddion copr copper hammer morthwyl copr copper hammers morthwyl copr copper money arian cochion copper nail hoelen gopr copper nails hoelen gopr copper ore mwyn copr copper ores mwyn copr copper screw sgriw gopr copper screws sgriw gopr copper stud styden gopr copper studs styden gopr copper sulphate copr sylffad copper sulphates copr sylffad copper washer wasier gopr copper washers wasier gopr copper wire gwifren gopr copper wires gwifren gopr coppered screw sgriw goprog coppered screws sgriw goprog coppered wire gwifren goprog coppered wires gwifren goprog coppers copr (Cu) coppice coedlan coppice prysgoedio coppices coedlan coprophage carthysydd coprophages carthysydd coprosterol coprosterol coprosterols coprosterol copulate ymgydio copulation ymgydiad copulations ymgydiad copunctual cydbwyntiol copy copi copy copïo copy key bysell gopïo copy menu dewislen gopïo copy menus dewislen gopïo copy ruler copïo mesurydd copy-cat crime trosedd efelychu copy-cat crimes trosedd efelychu copycat theory damcaniaeth efelychu copyholder copiddeiliad copyholders copiddeiliad copyright hawlfraint copyrights hawlfraint cor anglais cor anglais coral cwrel coral stitch pwyth cwrel coral stitches pwyth cwrel coralline cwrelaidd corals cwrel corbel corbel corbelled arch bwa corbelaidd corbelled arches bwa corbelaidd corbels corbel cord cortyn corded weave gwehyddiad cordynnog corded weaves gwehyddiad cordynnog cordial cordial cordials cordial cordillera cadwyn cordilleras cadwyn cordless diwifr cords cortyn corduroy melfaréd core craidd core and foundation subjects pynciau craidd a sylfaen core area maes craidd core areas maes craidd core box blwch craidd core boxes blwch craidd core culture diwylliant craidd core cultures diwylliant craidd core curriculum cwricwlwm craidd core curriculums cwricwlwm craidd core diameter diamedr craidd core diameters diamedr craidd core impression argraff craidd core impressions argraff craidd core lipped and veneered door drws craidd wedi'i ymylu a'i argaenu core lipped and veneered doors drws craidd wedi'i ymylu a'i argaenu core memory cof craidd core pattern patrwm craidd core patterns patrwm craidd core print argraffiad craidd core prints argraffiad craidd core store storfa graidd core stores storfa graidd core subject pwnc craidd core subjects pwnc craidd core syllabus maes llafur craidd core vocabulary geirfa graidd core yarn edafedd craidd core-domain-sphere craidd-parth-cylch core-domain-spheres craidd-parth-cylch coreboard craiddfwrdd coreboards craiddfwrdd cored pattern patrwm creiddig cored patterns patrwm creiddig cored solder sodr craidd cored solders sodr craidd corer digreiddiwr corers digreiddiwr cores craidd coriander coriander corianders coriander cork corc cork corcyn cork block bloc corc cork blocks bloc corc cork bung topyn corc cork bungs topyn corc cork oak derwen gorc cork oaks derwen gorc cork ring cylch corc cork rings cylch corc cork rubber rwber corc cork rubbers rwber corc cork slab tafell gorc cork slabs tafell gorc cork tile teilsen gorc cork tiles teilsen gorc corks corcyn corky corcaidd corm corm cormoid cormaidd corms corm corn corn (=maize) corn cob tywysen corn corn cobs tywysen corn corn oil olew corn corn oils olew corn corn-beef cornbiff corn-beefs cornbiff cornea cornbilen corneal cornbilennol corneas cornbilen corner cornel corner cornelu corner arc arc y gornel corner arcs arc y gornel corner block bloc cornel corner blocks bloc cornel corner bridle joint uniad bagl cornel corner bridle joints uniad bagl cornel corner flag lluman cornel corner flags lluman cornel corner halving haneru cornel corner halving joint uniad haneru cornel corner halving joints uniad haneru cornel corner hit ergyd gornel corner hits ergyd gornel corner joint uniad cornel corner joints uniad cornel corner kick cic gornel corner kicks cic gornel corner tear darn craith rhwyg cornel corner tear darns craith rhwyg cornel corner unit uned gornel corner units uned gornel corners cornel cornet cornet cornetist canwr cornet cornetists canwr cornet cornets cornet cornetto cornetto cornflakes creision ŷd cornflour blawd corn cornflour mould mowld blawd corn cornflour moulds mowld blawd corn cornflours blawd corn cornice cornis cornice gordo (of ice, snow, rock) cornice moulding mowldin cornis cornice mouldings mowldin cornis cornices cornis cornices gordo (of ice, snow, rock) cornopean cornopean cornopeans cornopean corns corn (=maize) coro coro corolla corola corollary canlyneb corollas corola corona corona coronary coronaidd coronary artery rhydweli goronaidd coronary heart disease clefyd coronaidd y galon coronary heart diseases clefyd coronaidd y galon coronary thrombosis thrombosis coronaidd coronas corona coroner crwner coroner's inquest cwest crwner coroner's inquests cwest crwner coroners crwner corporal corporal corporal punishment cosb gorfforol corporal punishments cosb gorfforol corporals corporal corporate corfforaethol corporate act of worship cydaddoliad corporate culture diwylliant corfforaethol corporate cultures diwylliant corfforaethol corporate identity hunaniaeth gorfforaethol corporate image delwedd gorfforaethol corporate images delwedd gorfforaethol corporate state gwladwriaeth gorfforaethol corporate states gwladwriaeth gorfforaethol corporate worship cydaddoli corporation corfforaeth corporation tax treth gorfforaeth corporation taxes treth gorfforaeth corporations corfforaeth corpus corpws corpus callosum corpws caloswm corpus callosums corpws caloswm corpus cavernosum corpws cafernoswm corpus cavernosums corpws cafernoswm corpus luteum corpws lwtewm corpus luteums corpws lwtewm corpus spongiosum corpws spongioswm corpus spongiosums corpws spongioswm corpus striatum corpws striatwm corpus striatums corpws striatwm corpuscle corffilyn corpuscles corffilyn corral corlan corrals corlan corrasion cyrathiad corrasions cyrathiad correct cywir correct cywiro correct angle ongl gywir correct angles ongl gywir correct position safle cywir correct positions safle cywir correct proportion cyfrannedd cywir correct proportions cyfrannedd cywir correct sequence trefn gywir correct sequences trefn gywir correction cywiriad correction procedure trefn gywiro correction procedures trefn gywiro corrections cywiriad corrective reading darllen a chywiro correlate cydberthyn correlate cydberthyniad correlate cydberthynol correlates cydberthyniad correlation cydberthyniad correlation coefficient cyfernod cydberthyniad correlation coefficients cyfernod cydberthyniad correlation matrix matrics cydberthyniad correlation matrixes matrics cydberthyniad correlations cydberthyniad correspond cyfateb correspondence cyfatebiaeth (=similarity) correspondence gohebiaeth (=letters) correspondence course cwrs drwy'r post correspondence courses cwrs drwy'r post correspondence education addysg drwy'r post correspondence educations addysg drwy'r post correspondences cyfatebiaeth (=similarity) correspondences gohebiaeth (=letters) corresponding cyfatebol corresponding angles onglau cyfatebol corresponding sides ochrau cyfatebol corresponding society cymdeithas ohebu corridor coridor corridor kitchen cegin hirgul corridor kitchens cegin hirgul corridors coridor corrie peiran corries peiran corrode cyrydu corrosion cyrydiad corrosion inhibitor atalydd rhwd corrosion inhibitors atalydd rhwd corrosion of iron cyrydu haearn corrosion resistant gwrthgyrydiad corrosions cyrydiad corrosive cyrydol corrugated rhychiog corrugated card cerdyn rhychiog corrugated cards cerdyn rhychiog corrugated fastener ffasnydd rhychiog (wiggle nail) corrugated fastener hoelen rychiog corrugated fasteners ffasnydd rhychiog (wiggle nail) corrugated fasteners hoelen rychiog corrugated iron haearn rhychiog corrugated irons haearn rhychiog corrugated paper papur rhychiog corrugated papers papur rhychiog corrupt llygru corruption llygredd corruption of electronic information llygru gwybodaeth electronig corruptions llygredd corset staes corsets staes cortex cortecs cortexes cortecs corticosterone corticosteron corticosterones corticosteron corticotrophin corticotroffin corticotrophins corticotroffin cosecant cosecant (cosec) cosecants cosecant (cosec) cosech cosech coseches cosech cosh cosh coshs cosh cosine cosin (cos) cosines cosin (cos) cosmetics cosmetigau cosmic cosmig cosmological cosmolegol cosmological argument dadl gosmolegol cosmological arguments dadl gosmolegol cosmology cosmoleg cosmopolitan amlgenhedlig cost cost cost analysis dadansoddiad costau cost centre canolfan gost cost centres canolfan gost cost classification sheet taflen dosbarthu costau cost classification sheets taflen dosbarthu costau cost effectiveness effeithiolrwydd cost cost management rheoli costau cost of living index mynegai costau byw cost plus pricing prisio cost plws cost price pris cost cost prices pris cost cost push inflation chwyddiant cynnydd cost cost push inflations chwyddiant cynnydd cost cost-benefit analysis dadansoddiad cost a budd cost-effective cost effeithiol costal asennol costing costiad costings costiad costs cost costs line llinell y costau costs lines llinell y costau costume gwisg costumes gwisg cot crud cot death marwolaeth yn y crud cot deaths marwolaeth yn y crud cotangent cotangiad (cot) cotangents cotangiad (cot) coterminal cyd-derfynol coth coth coths coth cottage cheese caws colfran cottage cheeses caws colfran cottage industry diwydiant cartref cottage loom gwŷdd bwthyn cottage looms gwŷdd bwthyn cottage pie pastai'r bwthyn cottage pies pastai'r bwthyn cottar cotywr cottars cotywr cotter coter cotter pin pìn hollt cotter pins pìn hollt cotters coter cotton cotwm cotton apron ffedog gotwm cotton aprons ffedog gotwm cotton ball pellen gotwm cotton balls pellen gotwm cotton bandage rhwymyn cotwm cotton bandages rhwymyn cotwm cotton belt ardal gotwm cotton belts ardal gotwm cotton linters linteri cotwm cotton tape tâp cotwm cotton tapes tâp cotwm cotton thread edau gotwm cotton threads edau gotwm cotton twine cortyn cotwm cotton twines cortyn cotwm cotton waste gwastraff cotwm cotton wastes gwastraff cotwm cotton wool gwlân cotwm cotton wools gwlân cotwm cottonbud ffon gotwm cottonbuds ffon gotwm cottons cotwm cotyledon cotyledon cotyledons cotyledon couch grass marchwellt couching cowtsio couching pwyth gorwedd couchings pwyth gorwedd cough peswch cough pesychu coughs peswch coulomb coulomb coulombmeter coulombmedr coulombmeters coulombmedr coulombs coulomb coulter cwlltwr coulters cwlltwr council cyngor council estate stad cyngor council estates stad cyngor council house estate stad dai cyngor council house estates stad dai cyngor council on tribunals cyngor ar dribiwnlysoedd councillor cynghorydd councillors cynghorydd councils cyngor counsel cynghori counselling service gwasanaeth cynghori counselling services gwasanaeth cynghori counselling technique techneg gynghori counselling techniques techneg gynghori counsellor cynghorwr counsellor training hyfforddi cynghorwyr counsellors cynghorwr count cyfrif count out cyfrif allan count rate cyfradd cyfrif count rates cyfradd cyfrif countability rhifadwyedd countable rhifadwy countably infinite yn rhifadwy anfeidraidd counted thread stitch pwyth cyfrif edau counted thread stitches pwyth cyfrif edau counter gwrthiad (in sport) counter gwrthio (in sport) counter masnachdy (house) counter rhifydd (in computing) counter enamel enamel cefndir counter enamels enamel cefndir counter exposition gwrthddangosiad counter expositions gwrthddangosiad counter revolution gwrthchwyldro counter revolutions gwrthchwyldro counter riposte riposte gwrthol counter ripostes riposte gwrthol counter spit gwrthdafod counter spits gwrthdafod counter veneer gwrthargaen counter veneers gwrthargaen counter-attack gwrthymosodiad counter-attacks gwrthymosodiad counter-current gwrthgerrynt counter-current flow llif gwrthgerrynt counter-current flows llif gwrthgerrynt counter-currents gwrthgerrynt counter-example gwrthenghraifft counter-examples gwrthenghraifft counter-reformation gwrthddiwygiad counter-reformations gwrthddiwygiad counter-revolutionary gwrthchwyldroadol counter-urbanisation gwrthdrefoli counteract gwrthweithio counterbalance gwrthbwyso counterbalance gwrthgytbwys (ice snout) counterbalanced gwrthgytbwys counterbalances gwrthgytbwys (ice snout) counterbore gwrthdyllu counterbored hole twll gwrthfor counterbored holes twll gwrthfor counterchange gwrthgyfnewid counterchange gwrthgyfnewidiad counterchange design cynllun gwrthgyfnewid counterchange designs cynllun gwrthgyfnewid counterchange pattern patrwm gwrthgyfnewid counterchange patterns patrwm gwrthgyfnewid counterchanges gwrthgyfnewidiad counterfactor gwrthffactor counterfactors gwrthffactor counterflow gwrthlif counterflows gwrthlif counterfoil bonyn counterfoils bonyn countermelody cyfalaw counterpart gwrthran counterparts gwrthran counterpoint gwrthbwynt counterpoints gwrthbwynt counterproof gwrthbrawf counterproofs gwrthbrawf counters gwrthiad (in sport) counters masnachdy (house) counters rhifydd (in computing) countershading gwrthliwio countersink gwrthsoddi countersink gwrthsoddydd countersink bit ebill gwrthsoddi countersink bits ebill gwrthsoddi countersink drill dril gwrthsoddi countersink drills dril gwrthsoddi countersinks gwrthsoddydd countersunk gwrthsodd countersunk pengwrthsodd (machine screws) countersunk head bolt bollt ben gwrthsodd countersunk head bolts bollt ben gwrthsodd countersunk head rivet rhybed pen gwrthsodd countersunk head rivets rhybed pen gwrthsodd countersunk hole twll gwrthsodd countersunk holes twll gwrthsodd countersunk rivet rhybed gwrthsodd countersunk rivets rhybed gwrthsodd countersunk screw sgriw wrthsodd countersunk screws sgriw wrthsodd countertenor uwchdenor countertenors uwchdenor counterweight gwrthbwysyn counterweights gwrthbwysyn countess iarlles counting song cân gyfrif counting songs cân gyfrif country gwlad country gwledig country and western canu gwlad country and westerns canu gwlad country dance dawns wledig country dances dawns wledig country house plasty yn y wlad country houses plasty yn y wlad country rock craig gysefin country rocks craig gysefin country seat plas country seats plas country town tref wledig country towns tref wledig countryside cefn gwlad countryside area ardal wledig countryside areas ardal wledig countryside recreation adloniant cefn gwlad countryside recreations adloniant cefn gwlad countrysides cefn gwlad counts cyfrif county sir county committee pwyllgor sirol county committees pwyllgor sirol county community cymuned sirol county councillor cynghorydd sir county councillors cynghorydd sir county court llys sirol county court claim form ffurflen hawlio'r llys sirol county court claim forms ffurflen hawlio'r llys sirol county courts llys sirol county palatine iarllaeth balatin county palatines iarllaeth balatin county record office archifdy'r sir county record offices archifdy'r sir couple cwpl couple cyplu couple family teulu cwpl coupled cypledig coupler cyplydd coupler stop stop cyplu coupler stops stop cyplu couplers cyplydd couples cwpl couplet cwpled (in rondeau) couplets cwpled (in rondeau) coupling cyplydd coupling flange fflans gyplydd coupling flanges fflans gyplydd coupling of valves cyplysu falfiau couplings cyplydd coupon cwpon coupons cwpon courante courante courantes courante courgettes courgettes course cwrs course team tîm y cwrs course teams tîm y cwrs courses cwrs coursework gwaith cwrs courseworks gwaith cwrs court cwrt (in sport and historical) court llys (modern legal) court and country llys a gwlad court leet cwrt lit court leets cwrt lit court of competent jurisdiction llys ag awdurdod digonol court of protection llys gwarchod court of special jurisdiction llys awdurdod arbennig court poet bardd llys court poets bardd llys court-baron cwrt barwn court-barons cwrt barwn courtelle courtelle courtelles courtelle courtier gŵr llys courtiers gŵr llys courts cwrt (in sport and historical) courts llys (modern legal) courtyard iard courtyards iard covalency cofalens covalent cofalent covalent bond bond cofalent covalent bonds bond cofalent covariance cydamrywiad covariances cydamrywiad cove cildraeth covenant cyfamod covenants cyfamod cover clawr (of book etc) cover cyfro (in cricket) cover gorchudd (in general) cover gorchuddio (in general) cover ymdrin â (a topic) cover board bwrdd clawr cover boards bwrdd clawr cover crop cnwd gorchudd cover crops cnwd gorchudd cover drive dreif gyfar cover drives dreif gyfar cover note nodyn diogelu cover notes nodyn diogelu cover paper papur clawr cover papers papur clawr cover point cyfar cover points cyfar cover-land tir gorchudd cover-lands tir gorchudd coverage sylw (in media) coverages sylw (in media) covered button botwm gorchudd covered buttons botwm gorchudd coverlet cwrlid coverlets cwrlid covers clawr (of book etc) covers gorchudd (in general) coversine cyfersin coversines cyfersin coverslip arwydryn coverslips arwydryn coves cildraeth cow horn corn gwartheg cow horns corn gwartheg cow's tongue stake bonyn tafod buwch cow's tongue stakes bonyn tafod buwch cowbells clychau gwartheg cowl cwfl cowl collar coler cwfl cowl collars coler cwfl cowl neck gwddf cwfl cowl necks gwddf cwfl cowls cwfl cox cocs cox cocsio coxed four pedwar a chocs coxed pair pâr a chocs coxless four pedwar coxless fours pedwar coxless pair pâr coxless pairs pâr crab cranc crabs cranc crack crac crack cracio cracked enamel enamel cracellu cracked enamels enamel cracellu cracker cracydd crackers cracydd crackle cracellu cracks crac cradle crud cradle crudo (in metalwork) cradle V crud V cradle cap crudgen cradle caps crudgen cradle song hwiangerdd cradle songs hwiangerdd cradles crud cradling crudiad cradling piece darn crudiad (hearth) cradling pieces darn crudiad (hearth) cradlings crudiad craft bad (boat) craft crefft craft dye llifyn crefft craft dyes llifyn crefft craft guild gild crefft craft guilds gild crefft craft knife cyllell grefft craft knifes cyllell grefft craft paint paent crefft craft paints paent crefft craft process proses grefft craft skill sgìl crefft craft skills sgìl crefft crafts bad (boat) crafts crefft craftsman crefftwr craftsmans crefftwr craftsmanship crefftwriaeth craftsmanships crefftwriaeth craftworker crefftwr craftworkers crefftwr crag clegyr crag and tail clegyr a chynffon craggy clegyrog crags clegyr cramp cramp cramp crampio cramping action arwaith crampio cramping actions arwaith crampio cramping blocks blociau crampio crampon crampon crampons crampon cramps cramp cranberries llugaeron crane craen cranes craen cranial creuanol cranium creuan craniums creuan crank cranc crank pin crancbin crank pins crancbin crank pivot crancgolyn crank pivots crancgolyn crank spanner sbaner cranc crank spanners sbaner cranc cranked cam cranked centre hinge colfach canol camdro cranked centre hinges colfach canol camdro cranked handle dolen gamdro cranked handles dolen gamdro cranked palette knife cyllell balet gam cranked palette knifes cyllell balet gam cranks cranc crankshaft crancsiafft crankshafts crancsiafft crash chwalfa crash chwalu crash cwymp crash course cwrs carlam crash courses cwrs carlam crashs chwalfa crashs cwymp crate cawell crater crater craters crater crates cawell crating cawell crating cawellu cratings cawell craton tarian cratons tarian craving chwant cravings chwant crawfish cimwch coch crawfishs cimwch coch crawl cropian (of baby) crawl enamel enamel llusg crawl enamelling enamlo llusg crawl enamels enamel llusg crawling ymlusgo (glazing fault) crayfish cimwch yr afon (freshwater) crayfishs cimwch yr afon (freshwater) crayon creon crayon engraving ysgythriad creon crayon engravings ysgythriad creon crayon pencil pensil creon crayon pencils pensil creon crayons creon crazing cracellu cream hufen cream hufennu cream cracker bisged gracer cream crackers bisged gracer cream horn corn hufen cream horns corn hufen cream of tartar powdr tartar cream slice tafell hufen cream slices tafell hufen creaming method dull hufennu creaming methods dull hufennu creams hufen creamy hufennog creamy consistency ansawdd hufennog crease cris (in cricket) crease crych crease crychu crease recovery datgrychu crease-resistant gwrthgrych creases cris (in cricket) creases crych creasing hammer morthwyl crychu creasing hammers morthwyl crychu creasing stake bonyn crychu creasing stakes bonyn crychu creasing tool erfyn crychu creasing tools erfyn crychu create creu create characters creu cymeriadau create mode modd creu create modes modd creu creation creadigaeth creation date dyddiad creu creation dates dyddiad creu creations creadigaeth creative creadigol creative ability test prawf gallu creadigol creative ability tests prawf gallu creadigol creative approach agwedd greadigol creative approaches agwedd greadigol creative arts celfyddydau creadigol creative craftwork crefftwaith creadigol creative craftworks crefftwaith creadigol creative design cynllun creadigol creative designs cynllun creadigol creative expression mynegiant creadigol creative expressions mynegiant creadigol creative play chwarae creadigol creative response ymateb creadigol creative responses ymateb creadigol creative thinking meddwl creadigol creative work gwaith creadigol creative works gwaith creadigol creative writing ysgrifennu creadigol creativity creadigrwydd creativity test prawf creadigrwydd creativity tests prawf creadigrwydd creator creawdwr creators creawdwr credibility hygrededd credit credyd credit cyfrif yn gredyd credit accumulation casglu credydau credit agreement cytundeb credyd credit agreements cytundeb credyd credit buying prynu ar gredyd credit card cerdyn credyd credit cards cerdyn credyd credit control rheolaeth credyd credit control system system rheoli credyd credit control systems system rheoli credyd credit controller rheolwr credyd credit controllers rheolwr credyd credit controls rheolaeth credyd credit creation creu credyd credit exemption esgusodi rhag credyd credit note nodyn credyd credit notes nodyn credyd credit sale gwerthiant credyd credit sales gwerthiant credyd credit scheme cynllun credydau credit schemes cynllun credydau credit terms telerau credyd credit transfer trosglwyddiad credyd credit transfers trosglwyddiad credyd creditor credydwr creditors credydwr credits clodrestr (of names of people) credits credyd creed credo creeds credo creek cilfach (=inlet, bay) creek nant (in U.S.A) creeks cilfach (=inlet, bay) creeks nant (in U.S.A) creel rhesel sbwliau (spool rack) creels rhesel sbwliau (spool rack) creep ymgripiad (of soil) creep feeding didol borthi creep feeding of lambs didol borthi ŵyn bach creep feeding of suckling pigs didol borthi moch bach creeps ymgripiad (of soil) cremation amlosgiad cremations amlosgiad creosote oil olew creosot creosote oils olew creosot crepitation rhugliad crepitations rhugliad crescent cilgant crescent moon lleuad gilgant crescent moons lleuad gilgant crescentic cilgantaidd crescents cilgant cress berwr crest brig (of hill etc) crest crib (of bird) crested chain stitch pwyth cadwyn cribog crested chain stitches pwyth cadwyn cribog cresting arwydd crestings arwydd crests brig (of hill etc) crests crib (of bird) cretaceous cretasig cretinism cretinedd cretinisms cretinedd crevasse crefas crevasses crefas crevice tool teclyn corneli (vacuum tools) crevice tools teclyn corneli (vacuum tools) crewel needle nodwydd frodio crewel needles nodwydd frodio cricket criced cricket club clwb criced cricket clubs clwb criced cricket field maes criced cricket fields maes criced cricket shoe esgid griced cricket shoes esgid griced cricketer cricedwr cricketers cricedwr crickets criced crime trosedd crime scene analysis dadansoddiad safle trosedd crimes trosedd criminal troseddol criminal troseddwr criminal consistency hypothesis damcaniaeth cysondeb troseddau criminal justice cyfiawnder troseddol criminal justices cyfiawnder troseddol criminal law cyfraith trosedd criminal law and justice cyfraith troseddau a chyfiawnder criminal laws cyfraith trosedd criminal psychology seicoleg troseddu criminals troseddwr criminology troseddeg crimp crimpio crimson rhuddgoch (enamelling colour) crimson lake llif rhuddgoch crimson lakes llif rhuddgoch crimsons rhuddgoch (enamelling colour) crinkle crychu crinkled paper papur crych crinkled papers papur crych crisis argyfwng crisp claps clapio clir crispbread tafell gras crispbreads tafell gras crisps creision tatws criss-cross croesymgroes crista crista cristas crista criteria instrument offeryn meini prawf criteria instruments offeryn meini prawf criteria referencing cyfeirio at feini prawf criterion maen prawf criterion-referenced maen prawf gyfeiriol criterion-referenced assessment asesiad maen prawf gyfeiriol criterion-referenced assessments asesiad maen prawf gyfeiriol criterion-referenced test prawf maen prawf gyfeiriol criterion-referenced testing profi maen prawf gyfeiriol criterion-referenced tests prawf maen prawf gyfeiriol criterions maen prawf critic adolygydd (=reviewer) critic beirniad critical allweddol (=decisive, crucial) critical argyfyngus (of or at a crisis) critical beirniadol (of faculty) critical critigol (in mathematics and physics) critical and contextual studies astudiaethau beirniadol a chyd-destunol critical angle ongl critigol critical angles ongl critigol critical autonomy annibyniaeth feirniadol critical evaluation gwerthusiad beirniadol critical evaluations gwerthusiad beirniadol critical incident digwyddiad critigol critical incidents digwyddiad critigol critical learning period cyfnod dysgu allweddol critical learning periods cyfnod dysgu allweddol critical path analysis dadansoddiad llwybr critigol critical path method dull llwybr critigol (CPM) critical path methods dull llwybr critigol (CPM) critical point pwynt critigol critical points pwynt critigol critical range amrediad critigol critical ranges amrediad critigol critical ratio cymhareb gritigol critical region rhanbarth critigol critical regions rhanbarth critigol critical size maint critigol critical sizes maint critigol critical temperature tymheredd critigol critical temperatures tymheredd critigol criticism beirniadaeth criticisms beirniadaeth critics adolygydd (=reviewer) critics beirniad crochet crosio crochet gwaith crosio crochet hook bach crosio crochet hooks bach crosio crocheted lace les wedi'i grosio crocheted laces les wedi'i grosio crochets gwaith crosio crockery llestri crocus saffrwm crocus powder powdr crocws crocus powders powdr crocws croft crofft crofter crofftwr crofters crofftwr crofting system cyfundrefn grofftio crofting systems cyfundrefn grofftio crofts crofft crook bagl crooked grain graen cam crooked grains graen cam crooks bagl crop cnwd crop tocio (in photography) crop rotation cylchdro cnydau crop rotations cylchdro cnydau crops cnwd croquette croquette croquettes croquette crosier bagl crosiers bagl cross croes (in general) cross croesi cross croesiad (=act of crossing) cross banded plinth plinth bandin croes cross banded plinths plinth bandin croes cross banding bandin croes cross bandings bandin croes cross beam trawst cross beams trawst cross country traws gwlad cross country event cystadleuaeth draws gwlad cross country events cystadleuaeth draws gwlad cross country race ras draws gwlad cross country races ras draws gwlad cross cut trawstoriad cross cut trawstorri cross cuts trawstoriad cross elasticity trawselastigedd cross elasticity of demand trawselastigedd y galw cross feed trawsborthiant cross feeds trawsborthiant cross grain graen croes cross grains graen croes cross halving haneru croes cross halving joint uniad croes haneru cross halving joints uniad croes haneru cross hatching croeslinellu cross hey hai croes cross infection traws-heintiad cross infections traws-heintiad cross kick cic groes cross kicks cic groes cross member trawsaelod cross members trawsaelod cross multiply trawsluosi cross over trawsgroesiad cross overs trawsgroesiad cross peen wyneb croes cross peen hammer morthwyl wyneb croes cross peen hammers morthwyl wyneb croes cross peens wyneb croes cross piece darn croes cross pieces darn croes cross pollination trawsbeilliad cross pollinations trawsbeilliad cross profile trawsbroffil cross profiles trawsbroffil cross rail rheilen groes cross rails rheilen groes cross slide trawslithryn cross slides trawslithryn cross stitch pwyth croes cross stitches pwyth croes cross stretcher estynnwr croes cross stretchers estynnwr croes cross the goal line croesi'r llinell gôl cross the line croesi'r llinell cross tongue tafod croes cross tongues tafod croes cross wall croesfur cross walls croesfur cross wires croeswifrau cross-accent croesacen cross-accents croesacen cross-bedded trawshaenog cross-bedding trawshaenu cross-breeding croesfridio cross-channel boat cwch sianel cross-channel boats cwch sianel cross-compiler traws-grynhoydd cross-compilers traws-grynhoydd cross-contamination traws-halogiad cross-contaminations traws-halogiad cross-culture study astudiaeth drawsddiwylliannol cross-curricular trawsgwricwlaidd cross-curricular issue mater trawsgwricwlaidd cross-curricular issues mater trawsgwricwlaidd cross-curricular theme thema drawsgwricwlaidd cross-curricular themes thema drawsgwricwlaidd cross-curricularity trawsgwricwledd cross-cut chisel cŷn trawstor cross-cut chisels cŷn trawstor cross-cut darn craith trawstoriad cross-cut darns craith trawstoriad cross-cut saw trawslif cross-cut saws trawslif cross-feed lever lifer trawsborthiant cross-feed levers lifer trawsborthiant cross-fertilization trawsffrwythloni cross-filing croesffeilio cross-hair cursor cyrchwr traws cross-hair cursors cyrchwr traws cross-laterality trawsochredd cross-legged coesgroes (sitting) cross-link trawsgysylltiad cross-linkage trawsgyswllt cross-linkages trawsgyswllt cross-linking trawsgysylltu cross-links trawsgysylltiad cross-ratio cymhareb draws cross-rhythm trawsrythm cross-rhythms trawsrythm cross-section trawstoriad cross-sections trawstoriad crossbar croesfar crossbars croesfar crossbow bwa croes crossbows bwa croes crossed cheque siec wedi'i chroesi crossed cheques siec wedi'i chroesi crossing croesfan crossings croesfan crossway facing wynebyn croes crossway facings wynebyn croes crossway fold plyg croesraen crossway folds plyg croesraen crossway strip stribed croesraen crossway strips stribed croesraen crotales crotalau crotch seam sêm fforch crotch seams sêm fforch crotchet crosiet crotchets crosiet crouch cwrcwd (position) crouch cyrcydu crouch jump naid gwrcwd crouch jumps naid gwrcwd crouch-running rhedeg gwargam crouched burial claddu cwrcwd crouches cwrcwd (position) croute crwst croutes crwst crouton crouton croutons crouton crowbar trosol crowbars trosol crowd crwth (musical instrument) crowds crwth (musical instrument) crown corun (of the head) crown fitting line llinell ffitio pen crown fitting lines llinell ffitio pen crown guard gard uchaf crown guards gard uchaf crown land tir y goron crown lands tir y goron crown of sleeve pen llawes crown plate plât gwarchod crown plates plât gwarchod crown prosecution erlynydd y goron crown prosecutions erlynydd y goron crown rail rheilen warchod crown rails rheilen warchod crowns corun (of the head) crucible crwsibl crucible furnace ffwrnais grwsibl crucible furnaces ffwrnais grwsibl crucible steel dur crwsibl crucible steels dur crwsibl crucible tongs gefel grwsibl crucibles crwsibl crucifix croes crucifixes croes crucifixion croeshoeliad crucifixions croeshoeliad cruciform croesffurf cruck nenfforch cruck framed house tŷ ffrâm nenfforch cruck framed houses tŷ ffrâm nenfforch crucked nenffyrchog crucks nenfforch crude amrwd (=not adjusted or corrected) crude crai (=natural or raw state) crude birth / death rate cyfradd geni / marw syml crude birth / death rates cyfradd geni / marw syml crude oil olew crai crude oils olew crai cruiser llong ryfel gyflym cruisers llong ryfel gyflym crum horn crwmgorn crum horns crwmgorn crumb briwsionyn crumble briwsioni crumble cap cap inc clystyrog (fungus) crumble caps cap inc clystyrog (fungus) crumbly briwsionllyd crumbs briwsionyn crumpet cramwythen crumpets cramwythen crumple crychu crumple zone cywasgran crumple zones cywasgran crunchy creisionllyd crunode crwnod crunodes crwnod crusade croesgad crusades croesgad crush malu'n fân crush injury anaf mathru crushed enamel enamel mâl crushed enamels enamel mâl crusher malwr crushers malwr crust cramen crustacean cramennog crustaceans cramennog crustaceous cramennog crustal cramennol crustal plate plât cramennol crustal plates plât cramennol crusts cramen crutch bagl crutches bagl crwth crwth crwth player crythor crwth players crythor crwths crwth cryogenics cryogeneg cryolite cryolit cryolites cryolit cryopedology rhewbriddeg cryophil cryoffil cryophilic cryoffilig cryophils cryoffil cryoplanation rhew-wastadiant cryoplanations rhew-wastadiant cryoscopy cryosgopi cryptic cryptig cryptic coloration cêl-liwiad cryptic colorations cêl-liwiad cryptophyte cryptoffyt cryptophytes cryptoffyt crypts of Lieberkuhn cryptau Lieberkuhn crystabolite cristabolit crystabolites cristabolit crystal grisial crystalline grisialog crystalline glaze gwydredd grisialog crystalline glazes gwydredd grisialog crystalline lens lens grisialog crystalline pigment pigment grisialog crystalline pigments pigment grisialog crystalline structure ffurfiad grisialog crystalline structures ffurfiad grisialog crystallization grisialiad crystallizations grisialiad crystallize grisialu crystallized fruit ffrwythau grisialog crystallography grisialograffaeth crystals grisial crèche meithrinfa crèches meithrinfa crêpe crempog (=pancake) crêpe crêp (of paper) crêpe bandage rhwymyn crêp crêpe bandages rhwymyn crêp crêpe de chine crêpe de chine crêpe de chines crêpe de chine crêpe paper papur crêp crêpe papers papur crêp crêpes crempog (=pancake) crêpes crêp (of paper) cub cenau cube ciwb cube torri'n giwbiau cube root trydydd isradd cube roots trydydd isradd cube roots of unity trydydd israddau un cubes ciwb cubic ciwbig cubic close-packing pacio tyn ciwbig cubic equation hafaliad ciwbig cubic equations hafaliad ciwbig cubic metre metr ciwbig cubic metres metr ciwbig cubical ciwbigol cubism ciwbiaeth cubisms ciwbiaeth cubit cufydd cubits cufydd cuboid ciwboid cuboid epithelium epitheliwm ciwboid cuboid epitheliums epitheliwm ciwboid cuboids ciwboid cucumber ciwcymer cucumbers ciwcymer cuddle anwesu cuddly toy tegan anwes cue ciw (pool, snooker) cuff cyffen cufflink dolen lawes cufflinks dolen lawes cuffs cyffen cultic myth myth cyltig cultic myths myth cyltig cultivate trin (land) cultivated crop cnwd trin cultivated crops cnwd trin cultivation triniad cultivations triniad cultural diwylliannol cultural aspect agwedd ddiwylliannol cultural aspects agwedd ddiwylliannol cultural context cyd-destun diwylliannol cultural contexts cyd-destun diwylliannol cultural deprivation amddifadiad diwylliannol cultural deprivations amddifadiad diwylliannol cultural development datblygiad diwylliannol cultural developments datblygiad diwylliannol cultural diversity amrywiaeth ddiwylliannol cultural heritage etifeddiaeth ddiwylliannol cultural heritages etifeddiaeth ddiwylliannol cultural imperialism imperialaeth ddiwylliannol cultural imperialisms imperialaeth ddiwylliannol cultural landscape tirlun diwylliannol cultural landscapes tirlun diwylliannol cultural overlay troshaen ddiwylliannol culturalization diwylliannu culturally disadvantaged dan anfantais ddiwylliannol culture diwylliant (=customs etc) culture meithrin (bacteria etc) culture meithriniad (of bacteria etc) culture cells celloedd meithrin culture element elfen ddiwylliannol culture elements elfen ddiwylliannol culture medium cyfrwng meithrin culture mediums cyfrwng meithrin culture solution hydoddiant meithrin culture solutions hydoddiant meithrin culture tissues meinweoedd meithrin cultured diwylliedig (of person) cultures diwylliant (=customs etc) cultures meithriniad (of bacteria etc) cummerbund cummerbund cummerbunds cummerbund cumulative cronnus cumulative achievement record cofnod cyrhaeddiad cronnus cumulative achievement records cofnod cyrhaeddiad cronnus cumulative causation achosiaeth gronnus cumulative causations achosiaeth gronnus cumulative distribution function ffwythiant dosraniad cronnus cumulative distribution functions ffwythiant dosraniad cronnus cumulative frequency amlder cronnus cumulative frequency curve cromlin amlder cronnus cumulative frequency curves cromlin amlder cronnus cumulative frequency diagram diagram amlder cronnus cumulative frequency diagrams diagram amlder cronnus cumulative frequency distribution dosraniad amlder cronnus cumulative frequency distributions dosraniad amlder cronnus cumulative frequency graph graff amlder cronnus cumulative frequency graphs graff amlder cronnus cumulative frequency polygon polygon amlder cronnus cumulative frequency polygons polygon amlder cronnus cumulative hey hai cynnydd cumulative record cofnod cronnus cumulative records cofnod cronnus cumulative song cân gronnus cumulative songs cân gronnus cumulative spelling sillafu cronnus cumulative total cyfanswm cronnus cumulative totals cyfanswm cronnus cumulonimbus cwmwlonimbws cumulus cwmwlws cuneiform cynffurf cunning man dyn hysbys cunning mans dyn hysbys cup chuck crafanc gwpan cup chucks crafanc gwpan cup final gornest derfynol cup finals gornest derfynol cup handle dolen gwpan cup handles dolen gwpan cup shake hollt cwpan cup shakes hollt cwpan cup-tie gornest gwpan cup-ties gornest gwpan cupboard cwpwrdd cupboard bolt bollt gwpwrdd cupboard bolts bollt gwpwrdd cupboard lock clo cwpwrdd cupboard locks clo cwpwrdd cupboards cwpwrdd cupful cwpanaid cupfuls cwpanaid cupola cwpola cupola furnace ffwrnais gwpola cupola furnaces ffwrnais gwpola cupolas cwpola cupping cwpanu cupro-nickel nicel coprog cupro-nickels nicel coprog cupula cwpwla cupulas cwpwla curd ceuled curdle cawsio curds ceuled curds and whey ceuled a maidd cure caledu (glue) cure gofalaeth (of a curate) cure iachâd cures gofalaeth (of a curate) cures iachâd curfew hwyrgloch (bell) curfews hwyrgloch (bell) curing cochi (fish) curing cyweirio (leather) curing halltu (pork) curium curiwm (Cm) curiums curiwm (Cm) curl cwrl curl cyrlio curls cwrl curly brackets bachau cyrliog ({ }) currant cyrensen currant bread bara brith currant breads bara brith currants cyrensen currency arian cyfred current cerrynt current cyfredol current account cyfrif cyfredol current accounts cyfrif cyfredol current assets asedau cyfredol current balance clorian gerrynt (in physics) current balances clorian gerrynt (in physics) current band corlan gyfredol current bands corlan gyfredol current bedding llifhaenau current enquiry ymholiad cyfredol current font ffont cyfredol current fonts ffont cyfredol current liability rhwymedigaeth gyfredol current money arian treigl current nib pìn cyfredol current nibs pìn cyfredol current operation gweithred gyfredol current operations gweithred gyfredol current price pris cyfredol current prices pris cyfredol current rate cyfradd gyfredol current rates cyfradd gyfredol current standard safon gyfredol current standards safon gyfredol current variable newidyn cyfredol current variables newidyn cyfredol currents cerrynt curricular cwricwlaidd curricular experiences profiadau yn y cwricwlwm curriculum cwricwlwm curriculum leader arweinydd cwricwlwm curriculum leaders arweinydd cwricwlwm curriculum panel panel cwricwlwm curriculum panels panel cwricwlwm curriculum planning cynllunio'r cwricwlwm curriculum studies astudiaethau'r cwricwlwm curriculum time amser y cwricwlwm curriculum times amser y cwricwlwm curriculum vitae curriculum vitae curriculum vitaes curriculum vitae curriculums cwricwlwm curry cyri cursive rhedol cursive writing ysgrifennu sownd cursor cyrchwr cursor address cyfeiriad cyrchwr cursor position safle cyrchwr cursor positions safle cyrchwr cursors cyrchwr curtain llen curtain ring dolen llenni curtain rings dolen llenni curtain wall murlen curtain walls murlen curtains llen curtsy cyrtsi curvature crymedd curvatures crymedd curve cromlin (=curved line) curve crymu curve tro (=bend) curve of intersection cromlin groestoriad curved crom (with feminine nouns) curved crwm (with masculine nouns) curved area arwynebedd crwm curved areas arwynebedd crwm curved bodkin botgin crwm curved bodkins botgin crwm curved edge ymyl grom curved edges ymyl grom curved line llinell grom curved lines llinell grom curved open seam sêm agored grom curved open seams sêm agored grom curved rail rheilen grom curved rails rheilen grom curved scraper sgrafell grom curved scrapers sgrafell grom curved snips snipiwr crwm curved spit tafod crwm curved spits tafod crwm curved stretcher estynnwr crwm curved stretchers estynnwr crwm curved surface arwyneb crwm curved surfaces arwyneb crwm curved tinsnips snipiwr tun crwm curves cromlin (=curved line) curves tro (=bend) curvilinear cromlinog curvilinear decoration addurn cromlinog curvilinear decorations addurn cromlinog curvilinear trajectory taflwybr cromlinog cushion clustog cushion cover gorchudd clustog cushion covers gorchudd clustog cushions clustog cusp cwsb cusps cwsb custard cwstard custards cwstard custodian ceidwad custodians ceidwad custom arfer custom house tollty custom houses tollty custom of the manor arfer y faenor custom style arddull wedi’i addasu custom styles arddull wedi’i addasu customer cwsmer customer feedback adborth cwsmeriaid customer feedbacks adborth cwsmeriaid customer service gwasanaeth i gwsmeriaid customer service skill sgìl gwasanaeth i gwsmeriaid customer service skills sgìl gwasanaeth i gwsmeriaid customer services gwasanaeth i gwsmeriaid customers cwsmer customs arfer customs tollau customs and excise tollau tramor a chartref customs and excise officer swyddog tollau customs and excise officers swyddog tollau customs duty tolldal cut archoll (=wound) cut toriad (in general) cut torlun (=engraved block for printing) cut torri cut and paste torri a gludo cut and thrust trychu a gwanu cut at cheek trychu at foch cut at chest trychu at fynwes cut at flank trychu at ystlys cut at head trychu at ben cut clasp nail hoelen lorio cut clasp nails hoelen lorio cut door-lock torglo drws cut door-locks torglo drws cut glassware llestri gwydr cerfiedig cut nail torhoelen cut nails torhoelen cut off torri i ffwrdd cut on the thread torri ar yr edau cut out torri allan cut out on the bias torri ar y bias cut out on the cross torri ar y groes cut over trostorri cut paper papur wedi'i dorri cut papers papur wedi'i dorri cut shoot cyffyn a dorrwyd o blanhigyn cut shoots cyffyn a dorrwyd o blanhigyn cut shot trawsergyd cut shots trawsergyd cut stem coesyn a dorrwyd o blanhigyn cut stems coesyn a dorrwyd o blanhigyn cut surface arwyneb y toriad cut surfaces arwyneb y toriad cut tack hoelen fer cut tacks hoelen fer cut through torri trwodd cut-off torbwynt cut-off bay cilfae cut-offs torbwynt cutaneous croenol cuticle cwtigl cuticles cwtigl cutlery cyllyll a ffyrc cuts gostyngiadau cutter torrwr cutter bar bar torri cutter bars bar torri cutter block bloc torri cutter blocks bloc torri cutters torrwr cutting toriad (in botany) cutting action arwaith torri cutting actions arwaith torri cutting angle ongl dorri cutting angles ongl dorri cutting blade llafn torri cutting blades llafn torri cutting board bwrdd torri cutting boards bwrdd torri cutting clearance cliriad torri cutting clearances cliriad torri cutting edge ymyl dorri cutting edges ymyl dorri cutting fluid hylif torri cutting fluids hylif torri cutting gauge medrydd torri cutting gauges medrydd torri cutting iron llafn torri cutting irons llafn torri cutting knife cyllell dorri cutting knifes cyllell dorri cutting line llinell dorri cutting lines llinell dorri cutting list rhestr dorri cutting lists rhestr dorri cutting out paper papur torri allan cutting out papers papur torri allan cutting plane plân torri cutting planes plân torri cutting plate plât torri cutting plates plât torri cutting pliers gefelen dorri cutting press gwasg dorri cutting stroke strôc dorri cutting strokes strôc dorri cutting tools offer torri cutting wire gwifren dorri cutting wires gwifren dorri cutting-out scissors siswrn torri defnydd (for fabric) cuttings toriad (in botany) cuttlefish casting castio môr-gyllell cutwork torwaith cutworks torwaith cwm cwm (in Wales) cyanidin cyanidin cyanidins cyanidin cyanogen cyanogen cyanogens cyanogen cyanosis dulasedd cybernetic seibernetaidd cybernetics seiberneteg cycle cylch (of songs, poems) cycle cylchred (in physics etc) cycle of disadvantage cylch anfantais cycle of erosion cylchred erydu cycle of fifths cylch pumedau cycles cylch (of songs, poems) cycles cylchred (in physics etc) cyclic cylchol (in chemistry, music) cyclic seiclig (in biology) cyclic AMP AMP cylchol cyclic group grŵp cylchol cyclic groups grŵp cylchol cyclic mass offeren gylch cyclic quadrilateral pedrochr cylchol cyclic quadrilaterals pedrochr cylchol cyclical cylchol cyclical unemployment diweithdra cylchol cyclical unemployments diweithdra cylchol cycling cylchynu cyclohexane cylchohecsan cyclohexanes cylchohecsan cycloid cylchoid cycloidal curves cromliniau cylchoidol cycloidal gear tooth dant gêr cylchoidol cycloidal gear tooths dant gêr cylchoidol cycloids cylchoid cyclomatic number rhif seiclomatig cyclomatic numbers rhif seiclomatig cyclone seiclon cyclones seiclon cyclorama seiclorama cycloramas seiclorama cyclostome seiclostom cyclostomes seiclostom cyclosymmetry cylchgymesuredd cyclotherm cylchtherm cyclotron cylchotron cyclotrons cylchotron cylchoalkane cylchoalcan cylchoalkanes cylchoalcan cylchoalkene cylchoalcen cylchoalkenes cylchoalcen cylinder silindr cylinder vacuum cleaner sugnwr llwch silindr cylinder vacuum cleaners sugnwr llwch silindr cylinders silindr cylindrical silindrog cylindrical core craidd silindrog cylindrical cores craidd silindrog cylindrical cuffs cyffiau silindrog cylindrical development datblygiad silindrog cylindrical developments datblygiad silindrog cylindrical former ffurfydd silindrog cylindrical formers ffurfydd silindrog cylindrical projection tafluniad silindrog cylindrical projections tafluniad silindrog cylindroid silindroid cylindroids silindroid cymatogenic symatogenig cymbal symbal cymbals symbal cyst coden cysteine cystein cysteines cystein cystic cystig cystic pledrennol (medical) cystic fibrosis ffibrosis y bledren cystine cystin cystines cystin cystitis llid y bledren cysts coden cytokinesis cytocinesis cytokinin cytocinin cytokinins cytocinin cytology cytoleg cytoplasm cytoplasm cytoplasms cytoplasm cytosol cytosol cytosols cytosol cytosome cytosom cytosomes cytosom cytotoxic drug cyffur cytotocsig cytotoxic drugs cyffur cytotocsig dab dab dab dabio dabbed resist gwrthydd dabio dabbed resists gwrthydd dabio dado dado dado joint uniad dado dado joints uniad dado dagger dagr daggers dagr daily change newid beunyddiol daily changes newid beunyddiol daily cleaning glanhau dyddiol daily collective worship cydaddoliad dyddiol daily collective worships cydaddoliad dyddiol daily living activities gweithgareddau byw bob dydd daily office gwasanaeth beunyddiol daily offices gwasanaeth beunyddiol daily task tasg ddyddiol daily tasks tasg ddyddiol dairy llaethdy dairy farm fferm laeth dairy farms fferm laeth dairy industry diwydiant llaethdy dairy products cynnyrch llaeth dais esgynlawr daisy-wheel olwyn argraffu daisy-wheel printer argraffydd olwyn daisy-wheel printers argraffydd olwyn daisy-wheels olwyn argraffu dam argae dam cronni damage difrod damage difrodi damage to the ozone layer difrod i'r haen oson damages difrod damages iawndal (=compensation) damascene damasgin damascene damasgu damascenes damasgin damask damasg damasks damasg dame school ysgol hen ferch dame schools ysgol hen ferch dammed lake cronlyn dammed lakes cronlyn damp gwanychu (a sound) damp llaith damp lleithder damp storage storfa laith damp storages storfa laith damp-proof course cwrs gwrthleithder (D.P.C.) damp-proof courses cwrs gwrthleithder (D.P.C.) damped gwanychol (of sound) damped oscillation osgiliad gwanychol damped oscillations osgiliad gwanychol damped vibration dirgryniad gwanychol damped vibrations dirgryniad gwanychol dampen lleithio damper damper (=shock absorber) dampers damper (=shock absorber) damping gwanychiad (of sound) dampings gwanychiad (of sound) dampness lleithder damps lleithder damsons eirin duon dana dana danas dana dance dawns (form or motion) dance dawns (occasion) dance dawnsio dance composition cyfansoddiad dawns dance compositions cyfansoddiad dawns dance figure ffigur dawns dance figures ffigur dawns dance form ffurf dawns dance forms ffurf dawns dance freely dawnsio'n rhydd dance movement symudiad dawns dance movements symudiad dawns dance on the spot dawnsio yn yr unfan dance routine dawnsdrefn dance routines dawnsdrefn dance-band band dawns dance-bands band dawns dances dawns (form or motion) dances dawns (occasion) dandruff cen ar y pen dandruffs cen ar y pen danger area llain waharddedig (on playing field) danger areas llain waharddedig (on playing field) dangerous play chwarae peryglus dangling hongian yn rhydd dariole mould mowld dariol dariole moulds mowld dariol dark tywyll dark brown brown tywyll (enamelling colour) dark browns brown tywyll (enamelling colour) dark colour lliw tywyll dark colours lliw tywyll dark figure ffigur tywyll dark figures ffigur tywyll dark green gwyrdd tywyll (enamelling colour) dark greens gwyrdd tywyll (enamelling colour) dark purple porffor tywyll (tempering colour) dark purples porffor tywyll (tempering colour) dark ruby rhuddliw tywyll (enamelling colour) dark straw melyn tywyll (tempering colour) dark straws melyn tywyll (tempering colour) dark tone tôn tywyll (of colour) dark tones tôn tywyll (of colour) darkness tywyllwch darn craith darn trwsio darning hoop cylch creithio darning hoops cylch creithio darning needle nodwydd greithio darning needles nodwydd greithio darns craith dart dart dart gwibio dart perforation twll dart dart perforations twll dart dart slash toriad dart dart slashs toriad dart darts dart dash llinell doriad (in computing) dashed line llinell doredig dashed lines llinell doredig dashs llinell doriad (in computing) data data data bank banc data data banks banc data data capture cipio data data channel sianel ddata data channels sianel ddata data collection casglu data (act of) data controller rheolydd data data controllers rheolydd data data density dwysedd data data dictionary geiriadur data data encryption amgryptio data data entering mewnbynnu data data entry cofnod data data file ffeil ddata data files ffeil ddata data flow diagram diagram llif data data flow diagrams diagram llif data data format fformat data data formats fformat data data independence annibyniaeth data data independences annibyniaeth data data item eitem o ddata data items eitem o ddata data logging logio data data manipulation language iaith trin data (DML) data manipulation languages iaith trin data (DML) data model model data data models model data data portability cludadwyedd data data preparation paratoi data data preparation operator gweithredwr paratoi data data preparation operators gweithredwr paratoi data data processing prosesu data data processing department adran brosesu data data processing departments adran brosesu data data processing supervisor goruchwyliwr prosesu data data processing supervisors goruchwyliwr prosesu data data protection gwarchod data data representation cynrychioliad data data representations cynrychioliad data data retrieval adalw data data set set ddata data sets set ddata data sheet dalen ddata data sheets dalen ddata data storage storio data (act of) data structure strwythur data data structures strwythur data data transfer trosglwyddo data data transfer rate cyfradd trosglwyddo data data transfer rates cyfradd trosglwyddo data data transmission trawsyrru data (act of) data type math data data types math data data validation dilysu data (act of) data verification gwireddu data data-handling package pecyn trin data data-handling packages pecyn trin data data-response task tasg ymateb i ddata data-response tasks tasg ymateb i ddata database cronfa ddata database management rheolaeth cronfeydd data database management system system rheoli cronfeydd data database management systems system rheoli cronfeydd data database managements rheolaeth cronfeydd data databases cronfa ddata date datysen (=type of fruit) date dyddiad (on calendar) dated dyddiedig (=containing the date) dated wedi dyddio (=old-fashioned) dates datysen (=type of fruit) dates dyddiad (on calendar) datum datwm datum edge ymyl datwm datum edges ymyl datwm datum face wyneb datwm datum faces wyneb datwm datum line llinell ddatwm datum lines llinell ddatwm datum side ochr ddatwm datum sides ochr ddatwm datums datwm daughter cell epilgell daughter cells epilgell daughter centriole epilgentriol daughter centrioles epilgentriol daughter house cangen (of nunnery) daughter houses cangen (of nunnery) daughter isotope epilisotop daughter isotopes epilisotop daughter nucleus epilgnewyllyn daughter nuclide epilniwclid daughter nuclides epilniwclid daughter product epilgynnyrch daughter products epilgynnyrch day diwrnod (=period of 24 hours) day dydd (with named days and as opposed to night) day and night dydd a nos day book dyddlyfr day books dyddlyfr day care gofal dydd day cares gofal dydd day centre canolfan ddydd day centres canolfan ddydd day hospital ysbyty dydd day hospitals ysbyty dydd day nursery meithrinfa ddydd day of the March dydd Mers day room ystafell ddydd day rooms ystafell ddydd day shift shifft dydd day shifts shifft dydd day visitor ymwelydd undydd day visitors ymwelydd undydd day-neutral dydd-niwtral day-work gwaith dydd day-works gwaith dydd daylight golau dydd daylight factor ffactor golau dydd daylight factors ffactor golau dydd daylights golau dydd days of notification diwrnodau o rybudd de Moivre's theorem theorem de Moivre de Moivre's theorems theorem de Moivre de-Stalinization dadstalineiddio de-airing datawyru de-waxing digwyro deacon diacon deaconess diacones deacons diacon dead ball pêl farw dead ball line llinell gwsg dead ball lines llinell gwsg dead balls pêl farw dead cell cell farw dead cells cell farw dead centre canol llonydd dead centres canol llonydd dead heat ras gyfartal dead heats ras gyfartal dead knot cainc farw dead knots cainc farw dead record cofnod marw dead records cofnod marw dead shore ateg unionsyth dead shores ateg unionsyth dead size union faint dead sizes union faint dead smooth file ffeil orlefn dead smooth files ffeil orlefn dead wood pren marw dead woods pren marw deadbeat curiad stond (of mechanism) deadbeats curiad stond (of mechanism) deadline terfyn amser deadlines terfyn amser deadlock llwyrglo (=type of lock) deadlock sefyllfa ddiddatrys (=impasse) deadlocks llwyrglo (=type of lock) deadlocks sefyllfa ddiddatrys (=impasse) deadweight tonnage tunelledd llwyth deadweight tonnages tunelledd llwyth deaf byddar deaf child plentyn byddar deaf childs plentyn byddar deafness byddardod deal bargen deal delio dealing with customers delio â chwsmeriaid deals bargen deaminase dadaminas deaminases dadaminas deaminate dadamineiddio deamination dadamineiddiad deaminations dadamineiddiad dean deon deanery deondy deans deon dearcuate delta delta bwaog dearcuate deltas delta bwaog death marwolaeth death certificate tystysgrif marwolaeth death certificates tystysgrif marwolaeth death duty toll farwolaeth death grant grant marwolaeth death grants grant marwolaeth death penalty cosb eithaf death rate cyfradd marwolaethau death rates cyfradd marwolaethau death warrant gwarant dienyddio death warrants gwarant dienyddio deaths marwolaeth deathwatch beetle ticbryf deathwatch beetles ticbryf debasement llygriad (of coinage) debasements llygriad (of coinage) debate dadl debates dadl debility llesgedd debit debyd debit debydu debit account cyfrif debyd debit accounts cyfrif debyd debit interest llog ar ddebyd debit interests llog ar ddebyd debits debyd deblocking dadflocio debouncing dadadlamu debridement digramennu debris malurion (=detritus) debris rwbel (=man-made rubble etc) debt dyled debt crisis argyfwng dyledion debtor dyledwr debtors dyledwr debts dyled debugger dadfygiwr debuggers dadfygiwr debugging dadfygio decade degawd decadence dirywiaeth (in art etc) decadences dirywiaeth (in art etc) decades degawd decagon decagon decagons decagon decalcification datgalchiad decalcifications datgalchiad decalcify datgalchu decalescent point pwynt caledu decalescent points pwynt caledu decani decani decanis decani decant ardywallt decarbonize datgarboneiddio decarboxylate datgarbocsyleiddio decay dadfeiliad (in chemistry and radioactive) decay dadfeilio (in chemistry and radioactive) decay pydredd (in biology) decay pydru (in biology) decay chain cadwyn bydredd decay chains cadwyn bydredd decay constant cysonyn dadfeilio decay constants cysonyn dadfeilio decay series cyfres ddadfeiliad decayed tooth dant wedi pydru decayed tooths dant wedi pydru deceive twyllo decelerate arafu deceleration arafiad decelerations arafiad decentralization datganoliad decentralizations datganoliad decentralize datganoli deceptive cadence diweddeb annisgwyl deceptive cadences diweddeb annisgwyl decibel desibel decibels desibel decide penderfynu deciduous collddail deciduous tooth dant cyntaf deciduous tooths dant cyntaf deciduous tree coeden gollddail deciduous trees coeden gollddail deciduous woodland coetir collddail deciduous woodlands coetir collddail decile degradd decile point pwynt degradd decile points pwynt degradd deciles degradd decilitre decilitr decilitres decilitr decimal degol decimal degolyn decimal coinage arian degol decimal fraction ffracsiwn degol decimal fractions ffracsiwn degol decimal notation nodiant degol decimal notations nodiant degol decimal place lle degol decimal places lle degol decimal point pwynt degol decimal points pwynt degol decimal system system ddegol decimal systems system ddegol decimalize degoli decimals degolyn decimation degymu (=exaction of tithes) decimation dinistrio (=destruction) decimetre decimetr decimetres decimetr decision penderfyniad decision box blwch penderfyniad decision boxes blwch penderfyniad decision making penderfynu decision making process proses benderfynu decision table tabl penderfyniad decision tables tabl penderfyniad decision tree coeden benderfyniadau decision trees coeden benderfyniadau decisions penderfyniad deck dec decks dec declaim traethu declaration datganiad declaration of war cyhoeddi rhyfel declarations datganiad declare datgan declare an interest cyhoeddi diddordeb declare the innings closed cau'r batiad declination gogwyddiad declinations gogwyddiad decline dirywiad (=deterioration) decline gostyngiad (=decrease in price etc) declines dirywiad (=deterioration) declines gostyngiad (=decrease in price etc) declining industry diwydiant sy'n dirywio declivity goriwaered decoder datgodiwr decoders datgodiwr decollator decoladydd decollators decoladydd decolonize dad-drefedigaethu decolourize dadliwio decompose dadelfennu decomposer dadelfennydd decomposers dadelfennydd decomposition dadelfeniad decomposition method dull dadelfennu decomposition methods dull dadelfennu decomposition of azomethane dadelfeniad asomethan decompositions dadelfeniad decompress datgywasgu decompression datgywasgiad decompressions datgywasgiad deconstruct dadadeiladu decontaminate dadlygru decontrol dadreoli decorate addurno decorated addurnedig decorating punch pwnsh addurno decorating punches pwnsh addurno decoration addurn decorations addurn decorative addurnol decorative art celfyddyd addurnol decorative arts celfyddyd addurnol decorative chamfer siamffer addurnol decorative chamfers siamffer addurnol decorative container cynhwysydd addurnol decorative containers cynhwysydd addurnol decorative details manylion addurnol decorative finish gorffeniad addurnol decorative finishs gorffeniad addurnol decorative hem hem addurnol decorative hems hem addurnol decorative panel panel addurnol decorative panels panel addurnol decorative process proses addurnol decorative relief cerfwedd addurnol decorative reliefs cerfwedd addurnol decorative seam sêm addurnol decorative seams sêm addurnol decorative stitch pwyth addurnol decorative stitches pwyth addurnol decorative technique techneg addurnol decorative techniques techneg addurnol decorative through dovetail joint uniad cynffonnog trwodd addurnol decorative through dovetail joints uniad cynffonnog trwodd addurnol decorative unit uned addurnol decorative units uned addurnol decorative veneer argaen addurnol decorative veneers argaen addurnol decouple dadgyplu decrease gostwng pwythau (in knitting) decrease lleihad decrease lleihau decrease through back of stitch cyfyngu drwy gefn y pwyth decreases lleihad decreasing gostyngol (in economics) decreasing lleihaol (in general) decreasing cost cost ostyngol decreasing costs cost ostyngol decree archddyfarniad (in courts of law) decree archddyfarnu (in courts of law) decree ordeinio (=order) decree ordinhad (=official order) decree nisi archddyfarniad amodol decree nisis archddyfarniad amodol decrees archddyfarniad (in courts of law) decrees ordinhad (=official order) decrement gostwng (act of decreasing) decrement gostyngiad (=ratio or amount lost) decrement lleihad (=decrease) decrements gostyngiad (=ratio or amount lost) decrements lleihad (=decrease) decrepitate clindarddach decretal decretal decretals decretal decryption dadgryptio decumbent gorweddol decurion dengwriad decurions dengwriad decurrent llorestynnol decussate croesedig dedendum circle cylch dedendwm dedendum circles cylch dedendwm dedicate cyflwyno (a book, music etc) dedicate cysegru (a church) dedicated computer cyfrifiadur un pwrpas dedicated computers cyfrifiadur un pwrpas dedicated register cofrestr un pwrpas dedicated registers cofrestr un pwrpas dedicated word processor prosesydd geiriau un pwrpas dedicated word processors prosesydd geiriau un pwrpas dedication cyflwyniad (of book, music etc) dedication cysegriad (of church) dedications cyflwyniad (of book, music etc) dedications cysegriad (of church) deduce diddwytho (technical usage) deduce that diddwythwch (imperative) deduct didynnu (in arithmetic) deduction casgliad (=inference, conclusion drawn) deduction diddwythiad (theory) deduction didyniad (in arithmetic) deduction tynnu (of money) deductions casgliad (=inference, conclusion drawn) deductions diddwythiad (theory) deductions didyniad (in arithmetic) deductive proof prawf diddwythol deductive proofs prawf diddwythol deed gweithred deed of partnership gweithred partneriaeth deeds gweithred deep dwfn deep Naples yellow melyn dwfn Napoli deep Naples yellows melyn dwfn Napoli deep chrome yellow melyn crôm dwfn deep chrome yellows melyn crôm dwfn deep end of the bath pen dwfn y baddon deep fat frying ffrio dwfn deep freeze cabinet cwpwrdd rhew deep freeze cabinets cwpwrdd rhew deep freeze chest rhewgist deep freeze chests rhewgist deep lemon yellow melyn lemwn dwfn deep lemon yellows melyn lemwn dwfn deep litter gwasarn (for hens) deep litters gwasarn (for hens) deep mid wicket canolwr wiced bell deep mid wickets canolwr wiced bell deep saw llif dwfn deep sea fishing pysgota'r cefnfor deep square leg coeswr pell sgwâr deep square legs coeswr pell sgwâr deep sunken wedi'i suddo'n ddwfn deep throat G cramp cramp G dyfnwddf deep throat G cramps cramp G dyfnwddf deepen dyfnhau defamation difenwad defamations difenwad default diofynnu defaulter methdalwr defaulters methdalwr defeat trechu defeatist gwangalon defeatist gwangalonnwr (of person) defeatists gwangalonnwr (of person) defecate ymgarthu defecation ymgarthiad defecations ymgarthiad defect diffyg (=imperfection) defect gwrthgilio defect nam (physical) defective diffygiol (=imperfect) defective gwallus (=faulty) defector gwrthgiliwr defectors gwrthgiliwr defects diffyg (=imperfection) defects nam (physical) defence amddiffyn (in sport) defence amddiffynfa (=fortifications) defence amddiffyniad (=justification in response to accusation) defences amddiffyn (in sport) defences amddiffynfa (=fortifications) defences amddiffyniad (=justification in response to accusation) defend amddiffyn defend off the front leg amddiffyn oddi ar y droed flaen defend the goal amddiffyn y gôl defend the wicket amddiffyn y wiced defendant diffynnydd defendants diffynnydd defender cefnwr (in soccer, rugby) defenders cefnwr (in soccer, rugby) defensible space gwagle amddiffynnol defensible spaces gwagle amddiffynnol defensive amddiffynnol defensive bowling bowlio amddiffynnol defensive shot ergyd amddiffynnol defensive shots ergyd amddiffynnol defensive stroke ergyd amddiffynnol defensive strokes ergyd amddiffynnol deference parch deferences parch deferred confluence cydlifiad gohiriedig deferred confluences cydlifiad gohiriedig deferred payment tâl gohiriedig deferred payments tâl gohiriedig deficiency diffyg (=lack, deficit) deficiency characteristic nodwedd diffyg deficiency characteristics nodwedd diffyg deficiency disease clefyd diffyg deficiency diseases clefyd diffyg deficiency payment tâl diffyg deficiency payments tâl diffyg deficiency symptom symptom diffyg deficiency symptoms symptom diffyg deficient diffygiol deficit diffyg deficits diffyg defile cyfyng (=narrow passage) defiles cyfyng (=narrow passage) define diffinio definite pendant definite integral integryn pendant definite integrals integryn pendant definiteness pendantrwydd definition diffiniad definitions diffiniad deflagrating spoon llwy ffaglu deflagrating spoons llwy ffaglu deflate dadchwyddo (in economics) deflate dadchwythu (in physics) deflate gollwng aer allan (a tyre etc) deflated dadchwythedig deflation dadchwyddiant (in economics) deflation dadchwythiad (in physics / geology) deflations dadchwyddiant (in economics) deflations dadchwythiad (in physics / geology) deflect allwyro (in physics) deflect the ball gwyro'r bêl deflecting allwyriadol deflecting field maes allwyriadol deflecting fields maes allwyriadol deflection allwyriad deflections allwyriad deflocculate datglystyru deflocculation datglystyriad deflocculations datglystyriad defoaming diewynnu defoliate diddeilio deforestate datgoedwigo deform anffurfio deformation anffurfiad deformations anffurfiad deformity anffurfiad defraud twyllo defrost dadrewi defuzzification dadniwlo degassing dinwyo degassing plunger plymiwr dinwyo degassing plungers plymiwr dinwyo degassing tablet tabled ddinwyo degassing tablets tabled ddinwyo degeneracy dirywiad degenerate dirywiedig degenerate dirywio degenerating dirywiol degenerative disease clefyd dirywiol degenerative diseases clefyd dirywiol deglaciation dadrewlifiant deglaciations dadrewlifiant deglutition llyncu degradation diraddiad degradations diraddiad degrade diraddio degraded diraddedig degreasant datseimydd degreasants datseimydd degrease datseimio degree gradd degree exercise cyfansoddiad gradd degree exercises cyfansoddiad gradd degree of dissociation gradd ddaduno degree of pitch serthiant degrees gradd degrees of freedom graddau rhyddid degrees of the scale graddau'r raddfa dehisce ymagor dehiscent ymagorol dehorning digornio dehumanize dad-ddyneiddio dehydrate dadhydradu dehydrated dadhydredig dehydration dadhydradiad (of food) dehydration diffyg hylif (of person) dehydration agent dadhydradydd dehydration agents dadhydradydd dehydrations dadhydradiad (of food) dehydrations diffyg hylif (of person) dehydrogenase dadhydrogenas dehydrogenase activity gweithgaredd dadhydrogenas dehydrogenases dadhydrogenas dehydrogenate dadhydrogenu dehydrogenation dadhydrogeniad dehydrogenations dadhydrogeniad deism dëistiaeth deisms dëistiaeth delamination dadlaminadu delay oedi delay oediad delay line llinell oedi delay lines llinell oedi delayed riposte riposte oediog delayed ripostes riposte oediog delayed speech hwyr yn siarad delayer dihaenu (in order to simplify) delegate cynrychiolydd delegate dirprwyo delegate the management of dirprwyo rheolaeth delegated budget cyllideb ddirprwyedig delegated budgets cyllideb ddirprwyedig delegated expenditure gwariant dirprwyedig delegated expenditures gwariant dirprwyedig delegated item eitem ddirprwyedig delegated items eitem ddirprwyedig delegated legislation deddfwriaeth ddirprwyedig delegated legislations deddfwriaeth ddirprwyedig delegated power pŵer dirprwyedig delegated powers pŵer dirprwyedig delegates cynrychiolydd delegation dirprwyaeth delegation of budgets dirprwyo cyllidebau delegation of requirements dirprwyo gofynion delegations dirprwyaeth delete dileu delete key dilëwr deletion dilead deletions dilead delicate cain (=finely beautiful) delicate eiddil (=frail) delicate main (fabric) delicate ysgafn (of touch) delimit amffinio delimiter amffinydd delimiters amffinydd delinquency tramgwyddaeth delinquent tramgwyddus delinquent tramgwyddwr delinquent behaviour ymddygiad tramgwyddus delinquent behaviours ymddygiad tramgwyddus delinquents tramgwyddwr deliquescence gwlybyredd deliquescences gwlybyredd deliquescent gwlybyrol delirium deliriwm deliriums deliriwm delivery genedigaeth (of a baby) delivery date dyddiad trosglwyddo delivery dates dyddiad trosglwyddo delivery note nodyn trosglwyddo delivery notes nodyn trosglwyddo delivery tube tiwb cludo delivery tubes tiwb cludo delocalization dadleoliad delocalizations dadleoliad delocalize dadleoli delocalized dadleoledig delta delta deltaic deltaidd deltas delta deltoid ridge crib ddeltoid deltoid ridges crib ddeltoid delusion rhithdyb delusions rhithdyb delustre diloywi dem dem demagnetize dadfagneteiddio demagogue demagog demagogues demagog demand galw demand galw (in economics) demand hawlio (in general) demand curve cromlin galw demand curves cromlin galw demand feeding bwydo ar alw demand pull inflation chwyddiant cynnydd galw demand pull inflations chwyddiant cynnydd galw demanded quantity maint y galw (in economics) demands galw dematerialize difateroli dementia dementia dementias dementia demerit dirinwedd (of goods) demersal fishing pysgota'r gwaelod demesne demen demesnes demen demi semiquaver chwarter cwafer demi semiquavers chwarter cwafer demi-cadence diweddeb amherffaith demi-cadences diweddeb amherffaith demilitarize dadfilwrio demilitarized zone ardal ddadfilwroledig demilitarized zones ardal ddadfilwroledig demise by will cymynaeth democracy democratiaeth democrat democrat democratic democrataidd democratic leader arweinydd democrataidd democratic leaders arweinydd democrataidd democrats democrat demodulate dadfodiwliad demodulates dadfodiwliad demodulator dadfodylydd demodulators dadfodylydd demographic demograffig demographic change newid demograffig demographic changes newid demograffig demographic characteristic nodwedd ddemograffig demographic characteristics nodwedd ddemograffig demographic revolution chwyldro demograffig demographic revolutions chwyldro demograffig demographic structure strwythur demograffig demographic structures strwythur demograffig demographic transition trawsnewid demograffig demographic transitions trawsnewid demograffig demographic trend tuedd ddemograffig demographic trends tuedd ddemograffig demographics demograffeg demography demograffeg demolish chwalu demolition order gorchymyn chwalu demolition orders gorchymyn chwalu demon cythraul demons cythraul demonstrate arddangos (=show) demonstrate gwrthdystio (=protest) demonstration arddangosiad (=show) demonstration gwrthdystiad (=protest) demonstration lesson gwers enghreifftiol demonstration lessons gwers enghreifftiol demonstration program rhaglen arddangos demonstration programs rhaglen arddangos demonstrations arddangosiad (=show) demonstrations gwrthdystiad (=protest) demutualization datgilyddu denary degaidd denary number rhif degaidd denary numbers rhif degaidd denationalize dadwladoli denaturation dadnatureiddiad denaturations dadnatureiddiad denature dadnatureiddio denatzification dadnatsieiddio dendrite dendrid dendrites dendrid dendritic canghennog dendrochronology dendrocronoleg denervate dadnerfogi denier denier deniers denier denim denim denims denim denitrification dadnitreiddiad denitrifications dadnitreiddiad denitrify dadnitreiddio denitrifying bacteria bacteria dadnitreiddio denizenship dinasyddiaeth denizenships dinasyddiaeth denomination enwad (of religion) denominational religious education addysg grefyddol enwadol denominational religious educations addysg grefyddol enwadol denominational school ysgol enwadol denominational schools ysgol enwadol denominations enwad (of religion) denotation dynodiad denotations dynodiad denote dynodi dense dwys (of sound quality, in physics etc) dense trwchus (of bush etc) dense growth tyfiant trwchus dense growths tyfiant trwchus density dwysedd density gradient centrifugation allgyrchu graddiant dwysedd density independent factor ffactor annibynnol ar ddwysedd density independent factors ffactor annibynnol ar ddwysedd dent tolc dent tolcio dentage dentiad (of heddle) dentages dentiad (of heddle) dental deintiol dental brace ffrâm ddannedd dental braces ffrâm ddannedd dental decay pydredd dannedd dental floss edau ddeintiol dental formula patrwm dannedd dental formulas patrwm dannedd dental plaque plac deintiol dental plaques plac deintiol denticle deintigl denticles deintigl dentine dentin dentines dentin denting dentio dentist deintydd dentistry deintyddiaeth dentists deintydd dents tolc dentures dannedd gosod denudation treuliant denudation chronology cronoleg treuliant denudations treuliant deny gwadu deodorant diaroglydd deodorants diaroglydd deodorize diarogli deontological deontolegol deoxygenated deocsigenedig deoxyribose deocsiribos deoxyriboses deocsiribos depart gadael department adran department store siop adrannol department stores siop adrannol departmental adrannol departments adran departure ymadawiad departures ymadawiad dependant dibynnydd dependants dibynnydd dependence caethiwed (=being unable to do without) dependence dibyniaeth (=reliance) dependences caethiwed (=being unable to do without) dependences dibyniaeth (=reliance) dependency dibyniaeth (in general) dependency tiriogaeth ddibynnol (of country) dependent dibynnol (=depending on) dependent behaviour ymddygiad dibynnol dependent behaviours ymddygiad dibynnol dependent child plentyn dibynnol dependent childs plentyn dibynnol dependent population poblogaeth ddibynnol dependent populations poblogaeth ddibynnol dependent variable newidyn dibynnol dependent variables newidyn dibynnol depersonalization dadbersonoli depigmentation dadbigmentiad depigmentations dadbigmentiad depilate diflewio deplete darwagio (in biology) depleted diffygiol (of uranium) depleted uranium wraniwm diffygiol depleted uranium tip treiddiwr wraniwm diffygiol depleted uranium tips treiddiwr wraniwm diffygiol depleted uraniums wraniwm diffygiol depletion disbyddiad (in general) depletions disbyddiad (in general) deploy trefnu milwyr (troops) depolarization dadbolariad depolarizations dadbolariad depolarize dadbolaru depolarizer dadbolarydd depolarizers dadbolarydd depopulate diboblogi depopulated area ardal wedi'i diboblogi depopulated areas ardal wedi'i diboblogi depopulation diboblogaeth depopulations diboblogaeth deport alltudio deportation alltudiaeth deportations alltudiaeth depose diorseddu (=dethrone) depose diswyddo (other than king / queen) deposit adnau (of assets) deposit blaendal (=first payment) deposit dyddodi (chemical, silt etc) deposit dyddodyn (chemical, silt etc) deposit ernes (=money given as pledge) deposit account cyfrif cadw deposit accounts cyfrif cadw deposition deponiad (=sworn evidence) deposition diorseddiad (=dethronement) deposition diswyddiad (of official) deposition dyddodiad (of sediment) depositional dyddodol depositions deponiad (=sworn evidence) depositions diorseddiad (=dethronement) depositions diswyddiad (of official) depositions dyddodiad (of sediment) depositor adneuwr depositors adneuwr deposits adnau (of assets) deposits blaendal (=first payment) deposits dyddodyn (chemical, silt etc) deposits ernes (=money given as pledge) depreciate dibrisio depreciation dibrisiad (act of) depreciation dibrisiant (of currency) depreciations dibrisiad (act of) depreciations dibrisiant (of currency) depress gostwng (=lower) depress gwasgu (push down) depressed area ardal ddirwasgedig depressed areas ardal ddirwasgedig depression dirwasgiad (in economics) depression diwasgedd (of weather) depression gostyngiad (=lowering) depression iselder ysbryd (=low spirits) depression pant (in land) depression of freezing point gostyngiad y rhewbwynt depressions dirwasgiad (in economics) depressions diwasgedd (of weather) depressions gostyngiad (=lowering) depressions iselder ysbryd (=low spirits) depressions pant (in land) depressor gostyngydd depressor nerve nerf gostyngol depressor nerves nerf gostyngol depressors gostyngydd deprivation amddifadedd deprivations amddifadedd deprive amddifadu (in general) deprive difydio (=depose clergyman from office) deprived difreintiedig (of area) deprived area ardal ddifreintiedig deprived areas ardal ddifreintiedig deprived child plentyn amddifadus deprived childs plentyn amddifadus depth dyfnder depth charge ffrwydryn tanddwr depth charges ffrwydryn tanddwr depth dimension dimensiwn dyfnder depth dimensions dimensiwn dyfnder depth gauge medrydd dyfnder depth gauges medrydd dyfnder depth line llinell ddyfnder depth lines llinell ddyfnder depth of field dyfnder ffocws depth perception canfyddiad o ddyfnder depth perceptions canfyddiad o ddyfnder depth stop stop dyfnder depth stops stop dyfnder depths dyfnder deputation dirprwyaeth deputations dirprwyaeth deputy dirprwy deputy head dirprwy bennaeth (of school) deputy headmistress dirprwy brifathrawes deputy heads dirprwy bennaeth (of school) deputy lieutenant dirprwy raglaw deputy lieutenants dirprwy raglaw deregulate dadreoleiddio derelict diffaith dereliction diffeithdra dereliction order gorchymyn dirywiad llwyr dereliction orders gorchymyn dirywiad llwyr derelictions diffeithdra derivation deilliant derivations deilliant derivative deilliad derivative deilliadol derivative art celfyddyd ddeilliadol derivative arts celfyddyd ddeilliadol derivatives deilliad derive deillio derive an expression deillio mynegiad derived deilliadol derived function ffwythiant deilliadol derived functions ffwythiant deilliadol derived scale graddfa ddeilliadol derived scales graddfa ddeilliadol dermal croenol dermal plexus plethwaith plecsws dermaidd dermatitis dermatitis dermatologist dermatolegydd dermatologists dermatolegydd dermatology dermatoleg derrick deric derricks deric desalination dihalwyno descale digennu descant desgant descant recorder recorder desgant descant recorders recorder desgant descant viol feiol ddesgant descant viols feiol ddesgant descants desgant descend disgyn descendant disgynnydd descendants disgynnydd descending disgynnol descending colon colon disgynnol descending colons colon disgynnol descending order trefn ddisgynnol descending orders trefn ddisgynnol descending scale graddfa ddisgyn descending scales graddfa ddisgyn descent disgyniad descents disgyniad describe disgrifio description disgrifiad descriptions disgrifiad descriptive disgrifiadol descriptive language iaith ddisgrifiadol descriptive languages iaith ddisgrifiadol descriptive music cerddoriaeth ddisgrifiadol descriptive musics cerddoriaeth ddisgrifiadol descriptive statistics ystadegau disgrifiadol descriptor disgrifydd descriptors disgrifydd desegregation dadwahanu deselect dad-ddewis desert diffeithdir desert place diffeithle desert places diffeithle desert varnish farnais y diffeithdir desert varnishs farnais y diffeithdir deserted village pentref anghyfannedd deserted villages pentref anghyfannedd deserter enciliwr deserters enciliwr deserts diffeithdir desiccated dysychedig desiccated coconut coconyt mân desiccated coconuts coconyt mân desiccation dysychiad desiccations dysychiad desiccator sychiadur desiccators sychiadur design cynllun (=plan) design cynllunio (=plan) design dyluniad (=sketch or plan drawn) design dylunio (=draw a plan) design a system cynllunio system design and technology dylunio a thechnoleg design brief briff dylunio design briefs briff dylunio design criteria meini prawf dylunio design development datblygiad cynllun design developments datblygiad cynllun design evaluation gwerthuso cynllun design folio ffolio dylunio design framework fframwaith dylunio design frameworks fframwaith dylunio design label label cynllun design labels label cynllun design loop dolen ddylunio design loops dolen ddylunio design of a batik dyluniad batik design process proses ddylunio design refinements gorffeniadau yn y cynllun design thinking ystyried dylunio designate darpar designate dynodi designated dynodedig designated area maes dynodedig designated areas maes dynodedig designated school ysgol ddynodedig designated schools ysgol ddynodedig designer dylunydd designers dylunydd designing of programme cynllunio rhaglen designs cynllun (=plan) designs dyluniad (=sketch or plan drawn) desk desg desk check gwiriad desg desk checks gwiriad desg desks desg desktop bwrdd gwaith desktop publishing cyhoeddi bwrdd gwaith desktops bwrdd gwaith desloughing dadgennu desmomome desmomom desmomomes desmomom desolate diffaith despot unben despotism unbennaeth despotisms unbennaeth despots unben dessert pwdin dessert apple afal bwyta dessert apples afal bwyta desserts pwdin dessertspoon llwy bwdin dessertspoonful llond llwy bwdin dessertspoonfuls llond llwy bwdin dessertspoons llwy bwdin destarch dadstartsio destination cyrchfan destination disk cyrchddisg destination disks cyrchddisg destination feature nodwedd cyrchfan destination features nodwedd cyrchfan destination file ffeil gyrchfan destination files ffeil gyrchfan destinations cyrchfan destroy dinistrio destroyer llong ryfel fechan (ship) destroyers llong ryfel fechan (ship) destructive distrywiol destructive interference ymyriant distrywiol destructive interferences ymyriant distrywiol destructive readout allddarlleniad distrywiol destructive readouts allddarlleniad distrywiol detach datgysylltu detachable datgysylltiol detachable collar coler rhydd detachable collars coler rhydd detached datgysylltiedig detached chain stitch pwyth cadwyn unigol detached chain stitches pwyth cadwyn unigol detached house tŷ sengl detached houses tŷ sengl detail manylu detail manylyn detail drawing lluniad manylion detail drawings lluniad manylion detail paper papur manylion detail papers papur manylion detail scenery set fanwl detailed manwl detailed drawing lluniad manwl detailed drawings lluniad manwl details manylion details manylyn detect canfod detector canfodydd detector valve falf ganfod detector valves falf ganfod detectors canfodydd detention centre canolfan gadw detention centres canolfan gadw detergency glanedwaith detergent glanedydd detergents glanedydd deteriorate dirywio deterioration dirywiad deteriorations dirywiad determinant determinant (in mathematics) determinant penderfynyn (in immunology) determinants determinant (in mathematics) determinants penderfynyn (in immunology) determinate penderfynedig determinate key cywair penodol determination mesuriad (of size) determinations mesuriad (of size) determine darganfod determine penderfynu (movement) determine pennu (in economics) determined coefficient cyfernod pendant determined coefficients cyfernod pendant determinism penderfyniaeth determinisms penderfyniaeth determinist penderfyniadol determinist penderfyniedydd deterministic penderfynedig determinists penderfyniedydd deterrent arf ataliol deterrent ataliol deterrents arf ataliol detour dargyfeiriad detour index mynegrif dargyfeirio detour indexes mynegrif dargyfeirio detours dargyfeiriad detoxicate dadwenwyno detoxication dadwenwyniad detoxications dadwenwyniad detritivore detritysydd detritivores detritysydd detritus detritws (in biology) detritus malurion (=debris) deuce diws deuces diws deuteron diwteron deuterons diwteron devaluation dibrisiad devaluation of the pound dibrisio'r bunt devaluations dibrisiad devastating dinistriol develop datblygu develop control meithrin rheolaeth develop hypotheses datblygu rhagdybiaethau develop knowledge datblygu gwybodaeth develop performance datblygu perfformiad develop rule datblygu rheol develop skills meithrin sgiliau developed country gwlad ddatblygedig developing country gwlad sy'n datblygu developing embryo embryo datblygol development datblygiad development agency asiantaeth ddatblygu development area ardal ddatblygu development areas ardal ddatblygu development chart siart datblygiad development charts siart datblygiad development company cwmni datblygu development grant grant datblygu development grants grant datblygu development land tax treth tir datblygu development land taxes treth tir datblygu development process proses ddatblygu development site safle datblygu development sites safle datblygu development sketch braslun datblygiad development sketches braslun datblygiad developmental datblygiadol developmental age oed datblygiad developmental ages oed datblygiad developmental curriculum cwricwlwm datblygiadol developmental curriculums cwricwlwm datblygiadol developmental delay oediad datblygiad developmental guidance arweiniad ar ddatblygiad developmental guidances arweiniad ar ddatblygiad developmental maturity aeddfedrwydd datblygiad developmental process proses ddatblygiadol developmental reading darllen datblygiadol developmental readings darllen datblygiadol developmental stage cam datblygiadol developmental stages cam datblygiadol developmentally appropriate addas o ran datblygiad developments datblygiad deviance amplification ymhelaethiad o wyriant deviance amplifications ymhelaethiad o wyriant deviant gwyrdröedig deviant behaviour ymddygiad gwyrdröedig deviant behaviours ymddygiad gwyrdröedig deviate gwyro deviation gwyriad deviations gwyriad device dyfais devices dyfais devilled poeth devise dyfeisio devitrification diwydriad devitrifications diwydriad devolution datganoli devoted ymroddedig devotion ymroddiad devotions ymroddiad dew gwlith dew point gwlithbwynt dew points gwlithbwynt dewpond gwlithbwll dewponds gwlithbwll dexterity deheurwydd dextrose decstros dextroses decstros dhamma dhamma (= dharm) dhammas dhamma (= dharm) diabase diabas diabases diabas diabetes diabetes diabetic diabetig diabetic child plentyn diabetig diabetic childs plentyn diabetig diaeresis didolnod diagnose gwneud diagnosis diagnosis diagnosis diagnosis related groups grwpiau diagnosis perthynol diagnostic diagnostig diagnostic assessment asesiad diagnostig diagnostic assessments asesiad diagnostig diagnostic program rhaglen ddiagnostig diagnostic programs rhaglen ddiagnostig diagnostic routine rheolwaith diagnostig diagnostic routines rheolwaith diagnostig diagnostic test prawf diagnostig diagnostic testing profi diagnostig diagnostic tests prawf diagnostig diagnostics diagnosteg diagonal croesgornel (=from one corner to another) diagonal croeslin diagonal croeslinol (on a straight sided figure) diagonal lletraws (=slanted) diagonal bracing cleddu croeslinol diagonal cutting pliers gefelen dorri croeslin diagonal dominance trechedd croeslinol diagonal dominances trechedd croeslinol diagonal hip pocket poced glun letraws diagonal hip pockets poced glun letraws diagonal kick cic letraws diagonal kicks cic letraws diagonal pass pàs letraws diagonal rail rheilen groeslinol diagonal rails rheilen groeslinol diagonal scale graddfa groeslinol diagonal scales graddfa groeslinol diagonal stretcher estynnwr croeslinol diagonal stretchers estynnwr croeslinol diagonal stripe rhes groeslinol diagonal stripes rhes groeslinol diagonal stroke strôc groeslinol (lettering) diagonal strokes strôc groeslinol (lettering) diagonal test prawf croeslinol diagonal testing profi croeslinol diagonal tests prawf croeslinol diagonal wedging lletemu croeslinol diagonal-cutting nipper niper torri croeslinol diagonal-cutting nippers niper torri croeslinol diagonally yn groesgornel (=to opposite corner) diagonally yn groeslinol (in general) diagonals croeslin diagram diagram diagrammatic approach dull diagramatig diagrammatic approaches dull diagramatig diagrammatic notation nodiant arluniol diagrammatic notations nodiant arluniol diagrammatic representation cynrychioliad diagramatig diagrammatic representations cynrychioliad diagramatig diagrammatic technique techneg ddiagramatig diagrammatic techniques techneg ddiagramatig diagrams diagram diakinesis diacinesis dial deial dial gauge medrydd deial dial gauges medrydd deial dial test indicator prawf-ddangosydd deial (D.T.I.) dial test indicators prawf-ddangosydd deial (D.T.I.) dial-up modem modem deialu dial-up modems modem deialu dialect tafodiaith dialectal tafodieithol dialectic dilechdid dialectical materialism materoliaeth ddilechdidol dialectical materialisms materoliaeth ddilechdidol dialectics dilechdid dialects tafodiaith dialogue deialog dialogues deialog dials deial dialysate dialysad dialysates dialysad dialysis dialysis diamagnetism diamagnetedd diamagnetisms diamagnetedd diameter diamedr diameters diamedr diametral diamedrol diametral pitch pitsh diamedrol diametral pitches pitsh diamedrol diamond diemwnt diamond banding bandin diemwnt diamond bandings bandin diemwnt diamond knurl nwrl diemwnt diamond knurls nwrl diemwnt diamond point pwynt diemwnt diamond point chisel cŷn trwyn diemwnt diamond point chisels cŷn trwyn diemwnt diamond points pwynt diemwnt diamond tipped blaen diemwnt diamond tool erfyn diemwnt diamond tools erfyn diemwnt diamond wheel olwyn ddiemwnt diamond wheels olwyn ddiemwnt diamonds diemwnt diapason diapason diapasons diapason diaper diaper diapers diaper diaphragm diaffram (in plants and animals other than mammals) diaphragm llengig (=muscular partition in mammals) diaphragms diaffram (in plants and animals other than mammals) diaphragms llengig (=muscular partition in mammals) diarrhoea dolur rhydd diarrhoeas dolur rhydd diary dyddiadur diastase diastas diastases diastas diastole diastole diastoles diastole diastolic diastolig diastrophism diastroffedd diastrophisms diastroffedd diatom diatom (alga) diatomic deuatomig (yn cynnwys dau atom) diatoms diatom (alga) diatonic diatonig diatonic semitone hanner tôn diatonig diatonic semitones hanner tôn diatonig diatonicism diatonyddiaeth diatonicisms diatonyddiaeth dice deisio dice dis dicentric deusentrig dices dis dicotyledon deugotyledon dicotyledonous deugotyledonaidd dicotyledons deugotyledon dictator unben dictatorial unbenaethol dictators unben dictatorship unbennaeth dictatorship of the proletariat unbennaeth y proletariat dictatorships unbennaeth diction ynganiad dictionary geiriadur dictions ynganiad didactic apparatus cyfarpar didactig didactic model model didactig didactic models model didactig die dei die nut nyten ddei die nuts nyten ddei die-casting deigastio diegetic sound sain gynefin diegetic sounds sain gynefin dielectric deuelectrig dielectric deuelectryn dielectric constant cysonyn deuelectrig dielectric constants cysonyn deuelectrig dielectrics deuelectryn diet deiet dietary deietegol dietary deficiencies diffygion deiet dietary fibre ffibr deietegol dietary fibres ffibr deietegol dietary value sheet taflen gwerth deietegol dietary value sheets taflen gwerth deietegol dietetics deieteg dietitian deietegydd dietitians deietegydd diets deiet difference gwahaniaeth difference amplifier mwyhadur gwahaniaeth difference amplifiers mwyhadur gwahaniaeth difference of means gwahaniaeth cymedrau difference of two squares gwahaniaeth rhwng dau sgwâr differences gwahaniaeth different gwahanol differentiability differadwyedd differentiable differadwy differential differol (in mathematics and physics) differential differyn differential gwahaniaethol (in general) differential assembly cydosodiad differyn differential axis echelin ddifferyn differential calculus calcwlws differol differential coefficient cyfernod differol differential coefficients cyfernod differol differential equation hafaliad differol differential equations hafaliad differol differential erosion erydiad gwahaniaethol differential erosions erydiad gwahaniaethol differential permeability athreiddedd gwahaniaethol differential pulley pwli differol differential tone rhyng-dôn differential tones rhyng-dôn differentially permeable differol athraidd differentials differyn differentiate differu (in mathematics) differentiate gwahaniaethu (in general) differentiated gwahaniaethol differentiated curriculum cwricwlwm gwahaniaethol differentiated curriculums cwricwlwm gwahaniaethol differentiated examination arholiad gwahaniaethol differentiated examinations arholiad gwahaniaethol differentiated paper papur gwahaniaethol differentiated papers papur gwahaniaethol differentiation differiad (in mathematics and physics) differentiation gwahaniaethiad (in general) differentiation by outcome gwahaniaethu yn ôl y canlyniad differentiations differiad (in mathematics and physics) differentiations gwahaniaethiad (in general) difficult anodd difficulty anhawster diffract diffreithio diffraction diffreithiant diffraction grating gratin diffreithiant diffraction gratings gratin diffreithiant diffraction patterns patrymau diffreithiant diffractions diffreithiant diffuse cymysgu (in meteorology) diffuse tryledol diffuse tryledu (in physics and chemistry) diffuse ymledu (=spread out) diffuse porous mandyllog tryledol diffused lighting golau tryledol diffused lightings golau tryledol diffuser tryledwr diffuser spray tryledwr chwistrell diffusers tryledwr diffusion lledaenu diffusion trylediad (in physics and chemistry) diffusion ymlediad (=spreading out) diffusion cloud chamber llestr niwl trylediad diffusion cloud chambers llestr niwl trylediad diffusions ymlediad (=spreading out) diffusivity trylededd dig cloddfa (archaeological) dig cloddio digest treulio digestibility treuliadwyedd digestibility coefficient cyfernod treuliadwyedd digestibility coefficients cyfernod treuliadwyedd digestible treuliadwy digestion treuliad digestions treuliad digestive biscuit bisged ddigestif digestive biscuits bisged ddigestif digestive enzyme ensym treulio digestive enzymes ensym treulio digestive juice sudd treulio digestive juices sudd treulio digestive system system dreulio digestive systems system dreulio digit digid digit repetition test prawf ailadrodd rhifau digit repetition tests prawf ailadrodd rhifau digital digidol digital computer cyfrifiadur digidol digital computers cyfrifiadur digidol digital dice dis digidol digital dices dis digidol digital meter mesurydd digidol digital meters mesurydd digidol digital plotter plotydd digidol digital plotters plotydd digidol digital root isradd digidol digital roots isradd digidol digital signal signal digidol digital signals signal digidol digital-analogue converter trawsnewidydd digidol-analog (DAC) digital-analogue converters trawsnewidydd digidol-analog (DAC) digitation byseddiad (in botany and zoology) digitation digideiddiad (in computing) digitations byseddiad (in botany and zoology) digitations digideiddiad (in computing) digits digid dignity urddas digraph deugraff digraphs deugraff dihedral deuhedrol dihedral angle ongl ddeuhedrol dihedral angles ongl ddeuhedrol dihybrid deuhybrid dihybrids deuhybrid dilate ymagor (of blood-vessel etc) dilate ymledu (of pupils, cervix) dilation ymlediad dilations ymlediad dilemma cyfyng-gyngor dilemmas cyfyng-gyngor diluent gwanedydd diluents gwanedydd dilute gwanedig dilute gwanedu dilute acid asid gwanedig dilute acids asid gwanedig dilute sulphuric acid asid sylffwrig gwanedig dilute sulphuric acids asid sylffwrig gwanedig dilution gwanediad dilution teneuo (of skilled workers) dilutions gwanediad dim pylu dim pŵl dimension dimensiwn dimension dimensiynu dimensional dimensiynol dimensional control rheolaeth ddimensiynol dimensional controls rheolaeth ddimensiynol dimensional sketch braslun dimensiynol dimensional sketches braslun dimensiynol dimensioned drawing lluniad dimensiynol dimensioned drawings lluniad dimensiynol dimensions dimensiwn dimer deumer dimers deumer dimetric projection tafluniad deufetrig dimetric projections tafluniad deufetrig diminish cywasgu (in music) diminish lleihau (in general) diminished cywasg (in music) diminished llai (in general) diminished chord cord cywasg diminished chords cord cywasg diminished image delwedd lai diminished images delwedd lai diminished interval cyfwng cywasg diminished intervals cyfwng cywasg diminished seventh chord cord seithfed cywasg diminished seventh chords cord seithfed cywasg diminishing returns enillion lleihaol diminution cywasgiad (in music) diminution lleihad (in general) diminutions cywasgiad (in music) diminutions lleihad (in general) dimmer pylydd dimmer board bwrdd pylu dimmer boards bwrdd pylu dimmer-switch switsh pylu dimmer-switches switsh pylu dimmers pylydd dining chair cadair ystafell fwyta dining chairs cadair ystafell fwyta dining room ystafell fwyta dining rooms ystafell fwyta dining table bwrdd bwyd dining tables bwrdd bwyd dinner lady cynorthwyydd cinio dinosaur dinosor dinosaurs dinosor dinucleotide deuniwcliotid dinucleotides deuniwcliotid diocesan esgobaethol diocese esgobaeth dioceses esgobaeth diode deuod diodes deuod dioecious deuoecaidd diorama diorama dioramas diorama diorite diorit diorites diorit dioxide deuocsid dioxides deuocsid dioxygenated deuocsigenedig dip dip dip dipio dip gogwyddiad dip goledd (of strata) dip goleddu (of strata) dip trochdrwyth (for sheep) dip coating trocharaenu dip slope golethr dip slopes golethr diphtheria difftheria diphtherias difftheria diploid diploid diploid nucleus niwclews diploid diploidy diploidi diploma diploma diplomacy diplomyddiaeth diplomas diploma diplomat diplomydd diplomatic diplomyddol diplomatic history hanes diplomyddiaeth diplomatics diplomateg diplomats diplomydd dipole deupol dipole moment moment deupol dipole moments moment deupol dipoles deupol dipper dipell (oil painting) dipper trochydd dippers dipell (oil painting) dippers trochydd dipping trochi dipstick trochbren dipsticks trochbren direct cyfeirydd (sign) direct uniongyrchol direct access cyrchu uniongyrchol direct access mynediad uniongyrchol direct addressing cyfeirio uniongyrchol direct advertising hysbysebu uniongyrchol direct application rhoi (of paint etc) direct care gofal uniongyrchol direct cares gofal uniongyrchol direct contact cyswllt uniongyrchol direct contacts cyswllt uniongyrchol direct current cerrynt union (D.C.) direct current motor modur cerrynt union direct current motors modur cerrynt union direct currents cerrynt union (D.C.) direct data entry cofnodi data uniongyrchol direct dye llifyn uniongyrchol direct dyes llifyn uniongyrchol direct experience profiad uniongyrchol direct experiences profiad uniongyrchol direct free kick cic rydd uniongyrchol direct free kicks cic rydd uniongyrchol direct instruction dysgu uniongyrchol direct lighting golau uniongyrchol direct lightings golau uniongyrchol direct marketing marchnata uniongyrchol direct marketings marchnata uniongyrchol direct method dull uniongyrchol direct methods dull uniongyrchol direct moulding clay clai modelu uniongyrchol direct painting peintio uniongyrchol direct parry pario union direct proportion cyfrannedd union direct proportions cyfrannedd union direct ratio cymhareb union direct riposte riposte union direct ripostes riposte union direct taxes trethi uniongyrchol direct thrust gwaniad union direct thrusts gwaniad union direct variation amrywiad union direct variations amrywiad union direct vision spectroscope sbectrosgop golwg union direct vision spectroscopes sbectrosgop golwg union directed number rhif cyfeiriol directed numbers rhif cyfeiriol directed work gwaith gosod directed works gwaith gosod direction cyfeiriad direction of arrow A cyfeiriad saeth A direction of cut cyfeiriad y toriad direction of feed cyfeiriad porthiant direction of grain cyfeiriad y graen direction of movement cyfeiriad symudiad direction of rotation cyfeiriad y cylchdro (D.O.R.) direction of the ball cyfeiriad y bêl direction of throw cyfeiriad y tafliad directional cyfeiriadol directional selection detholiad cyfeiriadol directional selections detholiad cyfeiriadol directions cyfeiriad directions test prawf dilyn cyfarwyddiadau directions tests prawf dilyn cyfarwyddiadau directive cyfarwyddeb (in computing etc) directive cyfarwyddyd (in general) directives cyfarwyddeb (in computing etc) directives cyfarwyddyd (in general) director cyfarwyddwr director circle cyfeirgylch director circles cyfeirgylch director of education cyfarwyddwr addysg director of nursing services cyfarwyddwr gwasanaethau nyrsio directors cyfarwyddwr directory cyfeiriadur directrix cyfeirlin directrixes cyfeirlin directs cyfeirydd (sign) disability anabledd disable analluogi disable interruptions analluogi ymyriadau disabled anabl disabled people pobl anabl disabled peoples pobl anabl disabled relief rhyddhad anabledd disabled reliefs rhyddhad anabledd disablement anabledd disablement allowance lwfans yr anabl disablement allowances lwfans yr anabl disablement pension pensiwn yr anabl disablement pensions pensiwn yr anabl disablement resettlement officer swyddog ailsefydlu'r anabl disablement resettlement officers swyddog ailsefydlu'r anabl disablements anabledd disaccharide deusacarid disaccharides deusacarid disadvantaged dan anfantais disadvantaged group grŵp sydd dan anfantais disadvantaged groups grŵp sydd dan anfantais disadvantaged socially dan anfantais gymdeithasol disaffection annheyrngarwch disaffections annheyrngarwch disaggregate dadagregu disapplication datgymhwysiad disapplications datgymhwysiad disapply datgymhwyso disarm diarfogi disassembler dadgydosodydd disassemblers dadgydosodydd disc disg disc sander sandiwr disg disc sanders sandiwr disg discard gwaredu discharge arllwys (water) discharge arllwysiad (water) discharge dadwefriad (electrical) discharge dadwefru (electricity) discharge rhedlif (of pus, liquid etc) discharge rhyddhau (=release) discharge emission allyriad discharge emissions allyriad discharge planning cynllunio rhyddhau discharge tube tiwb dadwefru discharge tubes tiwb dadwefru discharger dadwefrydd dischargers dadwefrydd discharges arllwysiad (water) discharges dadwefriad (electrical) discharges rhedlif (of pus, liquid etc) disciplinarian disgyblwr disciplinarians disgyblwr disciplinary action camau i ddisgyblu discipline disgyblaeth disciplined disgybledig disciplines disgyblaeth disclosure datgeliad disclosures datgeliad disco disgo discography disgyddiaeth discolour afliwio discolouration afliwiad discolourations afliwiad disconnect datgysylltu discontent anniddigrwydd discontents anniddigrwydd discontinuity diffyg parhad discontinuous amharhaol (of variation) discontinuous toredig (=intermittent) discord anghytgord discordant anghydnaws (of colours) discordant anghytgordiol (of music) discordant anghytûn (of opinions) discords anghytgord discount disgownt discount store siop ddisgownt discount stores siop ddisgownt discounted cash flow llif arian disgowntiedig discounted cash flows llif arian disgowntiedig discounts disgownt discovery darganfyddiad discrete arwahanol (separate and distinct) discrete area of activity maes gweithgaredd annibynnol discrete data data arwahanol discrete programme of study rhaglen astudio annibynnol discrete random variable hapnewidyn arwahanol discrete random variables hapnewidyn arwahanol discrete variable newidyn arwahanol discrete variables newidyn arwahanol discretion disgresiwn discretionary dewisol discretionary exception eithriad dewisol discretionary exceptions eithriad dewisol discretionary grant grant dewisol discretionary grants grant dewisol discretions disgresiwn discriminant gwahanolyn discriminants gwahanolyn discriminate gwahaniaethu discrimination didoli (in exam questions) discrimination dirnadaeth (=good taste) discrimination gwahaniaethu (against) discrimination index cyfeirnod didoli discrimination indexes cyfeirnod didoli discriminations dirnadaeth (=good taste) discriminatory behaviour ymddygiad gwahaniaethol discriminatory behaviours ymddygiad gwahaniaethol discriminatory practice arfer gwahaniaethol discriminatory practices arfer gwahaniaethol discs disg discus disgen discuss trafod discussion trafodaeth discussion group cylch trafod (informal) discussion groups cylch trafod (informal) discussions trafodaeth disease clefyd diseased afiach diseases clefyd diseconomies of scale annarbodion maint disembark glanio disendow dadwaddoli disendowment dadwaddoliad disendowments dadwaddoliad disenfranchise dadryddfreinio disengage datgyweddu disengagement datgyweddiad disengagements datgyweddiad disequilibrium diffyg cydbwysedd disequilibrium unemployment diweithdra heb gydbwysedd disequilibrium unemployments diweithdra heb gydbwysedd disequilibriums diffyg cydbwysedd disestablish datgysylltu disestablishment datgysylltiad disestablishments datgysylltiad disfigurement anffurfiad disfigurements anffurfiad disguise cuddio (=conceal) dish dysgl dished base gwaelod dysglog dished bases gwaelod dysglog dished blank blanc dysglog dished blanks blanc dysglog dished shape siâp dysglog dished shapes siâp dysglog dishing bolio (=make convex) dishing pantio (=make concave) dishs dysgl dishwasher peiriant golchi llestri dishwashers peiriant golchi llestri disillusion dadrithio disincentive anghymhelliad disincentives anghymhelliad disinfect diheintio disinfectant diheintydd disinfectants diheintydd disinfected diheintiedig disinfection diheintiad disinfections diheintiad disintegrate chwalu (of rock) disintegrate ymddatod (in physics) disintegrated chwilfriw disintegration chwilfriwiant (of rock) disintegration ymddatodiad (in physics) disintegrations chwilfriwiant (of rock) disintegrations ymddatodiad (in physics) disjoint sets setiau digyswllt disk disg disk controller rheolydd disgiau disk controllers rheolydd disgiau disk crash chwalfa disg disk crashs chwalfa disg disk drive disgyrrwr disk drives disgyrrwr disk filing system system ddisg-ffeilio (DFS) disk filing systems system ddisg-ffeilio (DFS) disk head pen disg disk heads pen disg disk operating system system weithredu disg (DOS) disk operating systems system weithredu disg (DOS) disk pack pecyn disgiau disk packs pecyn disgiau disks disg dislocate afleoli dislocation afleoliad dislocations afleoliad dismantle datgysylltu dismembered drainage draeniad datgymalog dismembered drainages draeniad datgymalog dismount dadlwytho disobedience anufudd-dod disobediences anufudd-dod disobedient anufudd disorder anhrefn (=lack of order) disorder anhwylder (medical) disorderly pupil disgybl anystywallt disorderly pupils disgybl anystywallt disorders anhrefn (=lack of order) disorders anhwylder (medical) dispensary dosbarthfa dispersal gwasgariad dispersal of spores gwasgariad sborau dispersals gwasgariad disperse gwasgaru disperse medium cyfrwng gwasgaru disperse mediums cyfrwng gwasgaru disperse phase gwasgarwedd disperse phases gwasgarwedd dispersed gwasgarog dispersion gwasgariad dispersions gwasgariad dispersive gwasgarol dispersive power nerth gwasgaru dispersive powers nerth gwasgaru displace dadleoli displacement dadleoliad (of gases) displacement / time diagram diagram dadleoliad / amser displacement / time diagrams diagram dadleoliad / amser displacement angle ongl ddadleoliad displacement angles ongl ddadleoliad displacement diagram diagram dadleoliad displacement diagrams diagram dadleoliad displacement reaction adwaith dadleoli displacement reactions adwaith dadleoli displacement tonnage tunelledd dadleoliad displacement tonnages tunelledd dadleoliad displacements dadleoliad (of gases) display arddangos display arddangosfa (=small exhibition) display arddangosiad (act of) display dangosydd (on screen) display area lle dangos display areas lle dangos display board bwrdd arddangos display boards bwrdd arddangos display of dancing arddangosfa ddawnsio display panel panel arddangos display panels panel arddangos display stand stand arddangos display stands stand arddangos displayed formula fformiwla graffig displayed formulas fformiwla graffig disposable tafladwy disposable income incwm gwario disposable incomes incwm gwario disposable nappy cewyn parod disposable palette palet hepgor disposable palettes palet hepgor disposal gwarediad disposals gwarediad dispose gwaredu dispose of fullness ad-drefnu llawnder disproportionation dadgyfraniad disproportionations dadgyfraniad disputant dadleuwr disputants dadleuwr disputation dadl disputations dadl dispute anghydfod dispute resolution process proses datrys anghydfod disputes anghydfod disqualification diarddeliad disqualifications diarddeliad disqualify diarddel disqualify from the race diarddel o'r ras disrupt aflonyddu disruption aflonyddwch disruptions aflonyddwch disruptive aflonyddgar disruptive behaviour ymddygiad aflonyddgar disruptive behaviours ymddygiad aflonyddgar disruptive pupil disgybl aflonyddgar disruptive pupils disgybl aflonyddgar disruptive selection detholiad rhwygol disruptive selections detholiad rhwygol disruptiveness aflonyddwch dissect dyrannu dissected plateau llwyfandir dyranedig dissected plateaus llwyfandir dyranedig dissected rat llygoden fawr ddyranedig dissection dyraniad dissections dyraniad disseminate lledaenu dissemination of good practice lledaenu ymarfer da dissent anghydffurfiaeth dissenter anghydffurfiwr dissenters anghydffurfiwr dissenting anghydffurfiol dissents anghydffurfiaeth dissipate afradloni dissipation afradlonedd dissipations afradlonedd dissociate daduno dissociation daduniad dissociation constant cysonyn daduniad dissociation constants cysonyn daduniad dissociation curve cromlin ddaduniad dissociation curves cromlin ddaduniad dissociations daduniad dissolution diddymiad dissolution of the monasteries diddymu'r mynachlogydd dissolutions diddymiad dissolve diddymu (=dismiss or annul) dissolve hydoddi (e.g. solid in a liquid) dissolve toddi (in film editing and non-technical usage) dissonance anghyseinedd dissonances anghyseinedd dissonant anghyseiniol dissonant interval cyfwng anghyseiniol dissonant intervals cyfwng anghyseiniol distaff cogail distaffs cogail distal distal distal convoluted tubule tiwbyn troellog pen pellaf distal convoluted tubules tiwbyn troellog pen pellaf distal end pen pellaf distal ends pen pellaf distal tubule pen pella'r tiwbyn distal tubules pen pella'r tiwbyn distance pellter distance education addysg o bell distance educations addysg o bell distance learning dysgu o bell distance piece darn pellter distance pieces darn pellter distance swimming nofio pellter distance teaching addysgu o bell distance-decay gwanhad-pellter distances pellter distemper distemper distemper paint paent distemper distemper paints paent distemper distempers distemper distended chwyddedig distention chwyddiant distentions chwyddiant distil distyllu distillate distyllad distillates distyllad distillation distyllu distilled water dŵr distyll distilled waters dŵr distyll distinct amlwg distinctive nodedig distinguish gwahaniaethu distinguishable gwahaniaethadwy distinguishing note nodyn dangos (sol-fa) distinguishing notes nodyn dangos (sol-fa) distort aflunio (image) distort ystumio (facts) distort sprite aflunio corlun distortion afluniad (of image) distortion ystumiad (of facts) distortions afluniad (of image) distortions ystumiad (of facts) distract gwrthdynnu distraction gwrthdyniad distractions gwrthdyniad distractor gwrthdynnwr (in objective questions) distractors gwrthdynnwr (in objective questions) distrain atafaelu distraint atafaeliad distraints atafaeliad distress cyfyngder distress signal arwydd cyfyngder distress signals arwydd cyfyngder distress warrant gwarant atafaelu distress warrants gwarant atafaelu distributary allafon distributary channel allsianel distributary channels allsianel distribute dosbarthu (=share out) distribute dosrannu (in statistics) distributed computer system system gyfrifiadurol wasgaredig distributed computer systems system gyfrifiadurol wasgaredig distributed loading llwyth dosbarthedig distributed loadings llwyth dosbarthedig distribution dosbarthiad (=sharing out or dispersal) distribution dosraniad (=division into parts, classification) distribution channel sianel dosbarthu distribution channels sianel dosbarthu distribution coefficient cyfernod dosraniad distribution coefficients cyfernod dosraniad distribution curve cromlin ddosraniad distribution curves cromlin ddosraniad distribution of wealth dosbarthiad cyfoeth distribution pattern patrwm dosbarthiad distribution patterns patrwm dosbarthiad distributions dosbarthiad (=sharing out or dispersal) distributions dosraniad (=division into parts, classification) distributive dosbarthol distributive law deddf ddosbarthol distributive laws deddf ddosbarthol distributive trade masnach ddosbarthu distributive trades masnach ddosbarthu distributor dosbarthydd distributors dosbarthydd district ardal (=area with common characteristics) district dosbarth (=division of county electing its own councillors) district council cyngor dosbarth district councils cyngor dosbarth district education officer swyddog addysg rhanbarthol district education officers swyddog addysg rhanbarthol district general hospital ysbyty cyffredinol dosbarth district general hospitals ysbyty cyffredinol dosbarth district nurse nyrs ardal district nurses nyrs ardal district valuer prisiwr rhanbarth district valuers prisiwr rhanbarth districts ardal (=area with common characteristics) districts dosbarth (=division of county electing its own councillors) disturb tarfu ar disturbance aflonyddwch (=unrest) disturbance cynnwrf (=agitation) disturbances aflonyddwch (=unrest) disturbances cynnwrf (=agitation) disturbed aflonydd (=agitated) disturbed cythryblus (of psychological condition) disturbed pupil disgybl cythryblus disturbed pupils disgybl cythryblus disunite tynnu'n rhydd dital harp telyn fysell dital harps telyn fysell dither mwydro ditty canig diuresis troethlif diuretic diwretig diuretics diwretig diurnal dyddiol dive deif dive deifio dive at a striker's feet deifio wrth draed ymosodwr dive for the ball deifio am y bêl dive forward roll deifrol ymlaen dive forward rolls deifrol ymlaen diverge dargyfeirio divergence dargyfeiriad divergences dargyfeiriad divergent dargyfeiriol divergent question cwestiwn dargyfeiriol divergent questions cwestiwn dargyfeiriol divergent series cyfres ddargyfeiriol divergent thinking meddwl dargyfeiriol divergent thinkings meddwl dargyfeiriol diverging lens lens dargyfeirio diversify amrywiaethu diversion dargyfeiriad diversions dargyfeiriad diversity amrywiaeth divertimento divertimento dives deif divide gwahanfa ddŵr divide rhannu divide by a number rhannu â rhif divided rhanedig dividend buddran (=sum of money) dividend rhannyn (=number to be divided) dividends buddran (=sum of money) dividends rhannyn (=number to be divided) divider rhannwr dividers cwmpas mesur dividers rhannwr divides gwahanfa ddŵr dividing a line rhannu llinell dividing areas rhannu arwynebedd dividing head pen rhannu dividing heads pen rhannu dividing lines in perspective rhannu llinellau mewn persbectif divisibility rhanadwyedd divisible rhanadwy division adran (of football league etc) division gradden (of scale) division rhaniad (=part) division by factors rhannu â ffactorau division of labour rhaniad llafur divisional court llys adrannol divisional courts llys adrannol divisions adran (of football league etc) divisions amrywiadau (=variations) divisions gradden (of scale) divisions rhaniad (=part) divisor rhannydd divisors rhannydd divorce ysgariad divorce ysgaru divorces ysgariad dizygotic DZ deusygotig DS dizziness pendro do nothing instruction cyfarwyddyd gwneud dim do nothing instructions cyfarwyddyd gwneud dim do-se-do do-si-do doatiness llwydni mewn pren doctor meddyg doctorate doethuriaeth doctorates doethuriaeth doctors meddyg doctrine athrawiaeth doctrines athrawiaeth document dogfen document dogfennu document a system dogfennu system document reader darllenydd dogfennau document readers darllenydd dogfennau document window ffenestr dogfen document windows ffenestr dogfen documentation dogfennaeth documentations dogfennaeth documents dogfen docusoap sebon dogfennol docusoaps sebon dogfennol dodecagon dodecagon dodecagons dodecagon dodecahedron dodecahedron dodecahedrons dodecahedron dodecanal dodecanal dodecanals dodecanal dodecaphonic dodecaffonig dodecaphonic scale graddfa ddodecaffonig dodecaphonic scales graddfa ddodecaffonig dodecaphony dodecaffoni dodge osgoi dog paddle nofio ci dogfish morgi dogfishs morgi doily doili doldrums doldrymau dolerite dolerit dolerites dolerit dolina dolin dolinas dolin doll choice dewis doliau doll choices dewis doliau dollar doler dollar key bysell doler dollars doler dolly doli dolly peg peg doli dolly pegs peg doli dolly riveting rhybedu doli (bolster) dolman sleeve llawes ddolman dolman sleeves llawes ddolman dolmen dolmen dolmens dolmen dolomite dolomit dolomites dolomit dolphin dolffin dolphin kick cic dolffin dolphin kicks cic dolffin dolphins dolffin domain parth domains parth dome cromen dome cromennu dome castor castor cromen dome castors castor cromen domed cromennog domed blank blanc crymdo domed blanks blanc crymdo domed button botwm cromen domed buttons botwm cromen domes cromen domestic domestig (in general) domestic mewnol (not foreign) domestic affair mater mewnol domestic affairs mater mewnol domestic demand galw mewnol domestic demands galw mewnol domestic fuel tanwydd domestig domestic fuels tanwydd domestig domestic history hanes teuluol domestic industry diwydiant aelwyd domestic iron haearn smwddio domestic irons haearn smwddio domestic mains supply prif gyflenwad domestig domestic policy polisi cartref domestic science gwyddor cartref domestic sciences gwyddor cartref domestic staff staff domestig domestic studies astudiaethau cartref domestic system trefn aelwyd domestic systems trefn aelwyd domestic tourist ymwelydd o Brydain (in Britain) domestic tourists ymwelydd o Brydain (in Britain) domestic violence trais yn y cartref domestic violences trais yn y cartref domesticate dofi domiciliary cartref domiciliary service gwasanaeth cartref domiciliary services gwasanaeth cartref domiciliary visit ymweliad cartref domiciliary visits ymweliad cartref dominance goruchafiaeth dominances goruchafiaeth dominant llywydd (in music) dominant trechol (in general) dominant attribute priodwedd drechol dominant attributes priodwedd drechol dominant cadence diweddeb amherffaith dominant cadences diweddeb amherffaith dominant colour lliw trechol dominant colours lliw trechol dominant factor ffactor drechol dominant factors ffactor drechol dominant feature nodwedd trechol dominant features nodwedd trechol dominant seventh chord cord seithfed y llywydd dominant seventh chords cord seithfed y llywydd dominant wind gwynt cryfaf dominant winds gwynt cryfaf dominants llywydd (in music) dominate goruchafu (in the natural environment) dominate tra-arglwyddiaethu (of people) domination tra-arglwyddiaeth dominations tra-arglwyddiaeth doming hammer morthwyl cromennu doming hammers morthwyl cromennu dominion awdurdod (=control) dominion dominiwn (=territory) dominions awdurdod (=control) dominions dominiwn (=territory) domino domino domino banding bandin domino domino bandings bandin domino donkey seddisl (easel) donor rhoddwr donor molecule moleciwl cyfrannol donor molecules moleciwl cyfrannol donors rhoddwr doodling dwdlan door drws door fitting gosod drws door frame ffrâm ddrws door frames ffrâm ddrws door furniture celfi drws door latch clicied drws door latches clicied drws door lock clo drws door locks clo drws door panel panel drws door panels panel drws door-to-door salesman gwerthwr o ddrws i ddrws door-to-door salesmans gwerthwr o ddrws i ddrws doors drws dopamine dopamin dopamines dopamin doping amhureddu dormancy cysgiad dormant cwsg dormant bud blaguryn cwsg dormant buds blaguryn cwsg dormant volcano llosgfynydd cwsg dormer roof to dormer dormer roofs to dormer dormer window ffenestr do dormer windows ffenestr do dormitory dortur dormitory town tref noswylio dormitory towns tref noswylio dormitory village pentref noswylio dormitory villages pentref noswylio dorsal dorsal dorsal exercise ymarfer uwchgefn dorsal exercises ymarfer uwchgefn dorsal fin asgell ddorsal dorsal fins asgell ddorsal dorsal spine pigyn dorsal dorsal spines pigyn dorsal dorsiflexion cefnblygiad dorsiflexions cefnblygiad dorsiventral cefndorrol dorter dortur dorters dortur dose dos doses dos dot dot dot dotio dot matrix printer argraffydd matrics dot matrix printers argraffydd matrics dot pitch pitsh dotiau dot pitches pitsh dotiau dot punch pwnsh dotio dot punches pwnsh dotio dot punching dotbwnsio dotted line llinell doredig dotted lines llinell doredig dotted note nodyn dot dotted notes nodyn dot dotted rest tawnod dot dotted rests tawnod dot double dwbl double dyblu double action harp telyn arwaith dwbl double action harps telyn arwaith dwbl double arch dwy law i ffurfio pont (in dance) double award dyfarniad dwbl double awards dyfarniad dwbl double back stitch pwyth ôl dwbl double back stitches pwyth ôl dwbl double bar bar dwbl double bar line llinell bar dwbl double bar lines llinell bar dwbl double bars bar dwbl double bass bas dwbl double bass player canwr bas dwbl double bass players canwr bas dwbl double bassoon basŵn dwbl double bassoonist canwr basŵn dwbl double bassoonists canwr basŵn dwbl double bassoons basŵn dwbl double blast foot bellows megin droed chwyth dwbl double bond bond dwbl double bonds bond dwbl double buffering byffro dwbl double chain stitch pwyth cadwyn ddwbl double chain stitches pwyth cadwyn ddwbl double chorus côr dwbl double circulation cylchrediad dwbl double circulations cylchrediad dwbl double concerto concerto dwbl double counterpoint gwrthbwynt dwbl double counterpoints gwrthbwynt dwbl double cream hufen dwbl double creams hufen dwbl double cropping cnydio dwbl double cut file ffeil toriad dwbl double cut files ffeil toriad dwbl double decomposition dadelfeniad dwbl double decompositions dadelfeniad dwbl double density dwysedd dwbl double diapason diapason dwbl double diapasons diapason dwbl double dipper dipell ddwbl double dippers dipell ddwbl double dotted note nodyn deuddot double dotted notes nodyn deuddot double dribble dribl dwbl double dribbles dribl dwbl double ended dart dart deubwynt double ended darts dart deubwynt double engagement cyweddiad dwbl double engagements cyweddiad dwbl double entry llyfrifo dwbl double exposition dangosiad dwbl double expositions dangosiad dwbl double faced hammer morthwyl dau wyneb crwn double faced hammers morthwyl dau wyneb crwn double faggot stitch pwyth ffagod dwbl double faggot stitches pwyth ffagod dwbl double fault ffawt ddwbl double faults ffawt ddwbl double flat meddalnod dwbl double flats meddalnod dwbl double folded seam sêm ddeublyg double folded seams sêm ddeublyg double fugue ffiwg ddwbl double fugues ffiwg ddwbl double glazing gwydro dwbl double haunched dwbl hansiedig double helix helics dwbl double helixes helics dwbl double hem hem ddwbl double hems hem ddwbl double hollow-bit tongs gefel gegron ddwbl double incontinence anymataliaeth ddwbl double incontinences anymataliaeth ddwbl double knot stitch pwyth cwlwm dwbl double knot stitches pwyth cwlwm dwbl double lapped dovetail joint goruniad cynffonnog dwbl double lapped dovetail joints goruniad cynffonnog dwbl double length hyd dwbl double length arithmetic rhifyddeg hyd dwbl double length arithmetics rhifyddeg hyd dwbl double lengths hyd dwbl double lesson gwers ddwbl double lessons gwers ddwbl double machine stitched seam sêm ffel ddwbl double machine stitched seams sêm ffel ddwbl double mortise and tenon joint uniad mortais a thyno dwbl double mortise and tenon joints uniad mortais a thyno dwbl double open diapason diapason agored dwbl double open diapasons diapason agored dwbl double patch pocket poced glwt ddwbl double patch pockets poced glwt ddwbl double pointed dart dart deubwynt double pointed darts dart deubwynt double precision trachywiredd dwbl double precision arithmetic rhifyddeg trachywiredd dwbl double precision arithmetics rhifyddeg trachywiredd dwbl double precisions trachywiredd dwbl double quote dyfynnod dwbl double quotes dyfynnod dwbl double reed brwynen ddwbl double reeds brwynen ddwbl double roof to trawslath double roofs to trawslath double scull sgwl dwbl double sculls sgwl dwbl double sharp llonnod dwbl double sharps llonnod dwbl double sheet cynfas ddwbl double sheets cynfas ddwbl double somersault trosben dwbl double somersaults trosben dwbl double spacing bylchu dwbl double stopping gwasgiad dwbl double stoppings gwasgiad dwbl double strike trawiad dwbl double strikes trawiad dwbl double suspension gohiriant dwbl (in music) double suspensions gohiriant dwbl (in music) double take-off esgyniad deudroed double take-offs esgyniad deudroed double tenon tyno dwbl double tenons tyno dwbl double thickness trwch dwbl double thread edau ddwbl double threads edau ddwbl double tide dau lanw double tides dau lanw double tonguing tafodi dwbl double turning troad dwbl double turnings troad dwbl double virginal firdsinal ddwbl double virginals firdsinal ddwbl double-acting coupler cyplydd dwyffordd double-acting couplers cyplydd dwyffordd double-acting cylinder silindr gweithrediad-dwbl double-acting cylinders silindr gweithrediad-dwbl double-boarded floor llawr estyll dwbl double-boarded floors llawr estyll dwbl double-breasted â chaead dwbl (coat) double-ended bolt bollt ddeuben double-ended bolts bollt ddeuben double-ended spanner sbaner deuben double-ended spanners sbaner deuben double-glazed door drws dwbl-wydrog double-glazed doors drws dwbl-wydrog double-glazed window ffenestr gwydr dwbl double-glazed windows ffenestr gwydr dwbl double-headed screw sgriw edau ddeuben double-headed screws sgriw edau ddeuben double-lap tile teilsen lap dwbl double-lap tiles teilsen lap dwbl doubles dwbl doubles parau doubles game gêm i barau doubles games gêm i barau doublet dwbled doublets dwbled dove grey llwydlas (enamelling colour) dovetail angle ongl gynffonnog dovetail angles ongl gynffonnog dovetail bridle bagl gynffonnog dovetail bridle joint uniad bagl cynffonnog dovetail bridle joints uniad bagl cynffonnog dovetail bridles bagl gynffonnog dovetail cleat cledd cynffonnog dovetail cleats cledd cynffonnog dovetail halving haneru cynffonnog dovetail halving joint uniad haneru cynffonnog dovetail halving joints uniad haneru cynffonnog dovetail housing joint uniad rhigol gynffonnog dovetail housing joints uniad rhigol gynffonnog dovetail joint uniad cynffonnog dovetail joints uniad cynffonnog dovetail key clo cynffonnog dovetail nailing hoelio cynffonnog dovetail pin pìn cynffonnog dovetail pins pìn cynffonnog dovetail saw llif dyno fach dovetail saws llif dyno fach dovetail slope goledd cynffonnog dovetail slopes goledd cynffonnog dovetail tapered housing joint uniad rhigol gynffonnog daprog dovetail tapered housing joints uniad rhigol gynffonnog daprog dovetail template patrymlun cynffonnog dovetail templates patrymlun cynffonnog dovetailed key allwedd gynffonnog dovetailing tryfalu dovetailing machine peiriant uniadau cynffonnog dovetailing machines peiriant uniadau cynffonnog dowager gweddw dowagers gweddw dowel hoelbren dowel bit ebill hoelbren dowel bits ebill hoelbren dowel construction adeiladwaith hoelbren dowel constructions adeiladwaith hoelbren dowel groove rhigol hoelbren dowel grooves rhigol hoelbren dowel guide cyfeirydd hoelbren dowel guides cyfeirydd hoelbren dowel jig jig hoelbrennau dowel jigs jig hoelbrennau dowel joint uniad hoelbren dowel joints uniad hoelbren dowel peg peg hoelbren dowel pegs peg hoelbren dowel plate plât hoelbrennau dowel plates plât hoelbrennau dowel rod rhoden hoelbren dowel rods rhoden hoelbren dowels hoelbren down arrow saeth i lawr down arrows saeth i lawr down beat music cerddoriaeth curiad cryf down beat musics cerddoriaeth curiad cryf down cutting tyrchu (=vertical corrasion) down payment blaendal down payments blaendal down time amser di-fynd down times amser di-fynd down-count cyfrif i lawr down-counts cyfrif i lawr down-field i lawr y maes (of magnetic field) down-stroke ôl-strôc down-strokes ôl-strôc downbeat curiad i lawr downbeats curiad i lawr downdate dad-ddiweddaru downfold plyg i lawr downfolds plyg i lawr downhill side ochr waered downhill sides ochr waered downhill transition trawsnewid gwaeredol downhill transitions trawsnewid gwaeredol downland twyndir downlands twyndir download llwytho i lawr downpour cawod drom downpours cawod drom downstream i lawr yr afon downthrow side ochr syrthiedig downthrow sides ochr syrthiedig downtown canol tref downtowns canol tref downward i lawr downward pressure gwasgedd tuag i lawr downward pressures gwasgedd tuag i lawr downward sloping curve cromlin ddisgynnol downward sloping curves cromlin ddisgynnol downward vertical fertigol i lawr downward-sideways i lawr ac i'r ochr downwarp crychiad i lawr downwarps crychiad i lawr dowried gwaddoledig dowry gwaddol draft drafft draft drafftio draft a pattern drafftio patrwm draft document dogfen ddrafft draft documents dogfen ddrafft drafted pattern patrwm drafft drafted patterns patrwm drafft drafting paper papur drafftio drafting papers papur drafftio drafting process proses ddrafftio drafts drafft drag llusgiad drag llusgo drag bar llusgo bar (command) dragonnade erledigaeth filwrol dragonnades erledigaeth filwrol dragoon dragŵn dragoons dragŵn drags llusgiad drain draen drain draenio drainage carthffosiaeth (of sewage) drainage draeniad (in general) drainage bag bag draenio drainage bags bag draenio drainage basin dalgylch afon drainage basins dalgylch afon drainage pattern patrwm draeniad drainage patterns patrwm draeniad drainage runs dyfnder draeniau drainages carthffosiaeth (of sewage) drainages draeniad (in general) draining board astell ddiferu draining boards astell ddiferu draining paper papur diferu draining papers papur diferu drains draen drama drama drama in education drama mewn addysg dramas drama dramatic dramatig dramatic form ffurf ddramatig dramatic forms ffurf ddramatig dramatic skill sgìl dramatig dramatic skills sgìl dramatig dramatic structure strwythur dramatig dramatic structures strwythur dramatig dramatic theory theori drama dramatize dramateiddio drape gorchuddio draped backcloth cefnliain gorchuddio draped backcloths cefnliain gorchuddio draper dilledydd drapers dilledydd drapery dilladaeth draping qualities gorweddiad draught drafft draught tynfa (of ship) draught animal anifail gwedd draught animals anifail gwedd draughts drafft draughts tynfa (of ship) draughtsman drafftsmon draughtsmans drafftsmon draughtsmanship drafftsmonaeth draughtsmanships drafftsmonaeth draw lluniadu (a drawing in the technical sense) draw / paint computer system system luniadu / peintio ar gyfrifiadur draw / paint computer systems system luniadu / peintio ar gyfrifiadur draw a cross-section llunio trawstoriad draw a line tynnu llinell draw a picture tynnu llun draw a tangent tynnu tangiad draw a thread tynnu edau draw attention tynnu sylw (to) draw conclusions tynnu casgliadau draw down tynnu lawr draw leaf table bwrdd dalen estynedig draw leaf tables bwrdd dalen estynedig draw off tapio draw plate plât tynnu draw plates plât tynnu draw spike sbigyn tynnu draw spikes sbigyn tynnu draw to scale lluniadu wrth raddfa draw tongs gefel dynnu draw-a-man test prawf tynnu llun person draw-a-man tests prawf tynnu llun person drawbolt tynfollt drawbolts tynfollt drawboring darforio drawbridge pont godi drawbridges pont godi drawer drôr drawer and cupboard pulls dolennau droriau a chypyrddau drawer base gwaelod drôr drawer bases gwaelod drôr drawer bearer cynhalydd drôr drawer bearers cynhalydd drôr drawer bottom gwaelod drôr drawer bottoms gwaelod drôr drawer construction adeiladwaith drôr drawer constructions adeiladwaith drôr drawer guide rhedwr drôr drawer guides rhedwr drôr drawer joint uniad drôr drawer joints uniad drôr drawer lock clo drôr drawer lock chisel cŷn clo drôr drawer lock chisels cŷn clo drôr drawer locks clo drôr drawer opening agoriad drôr drawer openings agoriad drôr drawer rail rheilen ddrôr drawer rails rheilen ddrôr drawer runner rhedwr drôr drawer runners rhedwr drôr drawer side ochr ddrôr drawer sides ochr ddrôr drawer slip drôr-gryfhawr drawer slips drôr-gryfhawr drawers drôr drawfiling darffeilio drawing llun (in general) drawing lluniad (in technical sense) drawing convention confensiwn lluniadu drawing conventions confensiwn lluniadu drawing down tynnu lawr (forging process) drawing ink inc lluniadu drawing inks inc lluniadu drawing instruments offer lluniadu drawing pencil pensil lluniadu drawing pencils pensil lluniadu drawing technique techneg luniadu drawing techniques techneg luniadu drawing-board bwrdd lluniadu drawing-board clamp clamp bwrdd lluniadu drawing-board clamps clamp bwrdd lluniadu drawing-board clip clip bwrdd lluniadu drawing-board clips clip bwrdd lluniadu drawing-boards bwrdd lluniadu drawing-paper papur lluniadu drawing-papers papur lluniadu drawing-pin pìn bawd drawing-pins pìn bawd drawings llun (in general) drawings lluniad (in technical sense) drawknife cyllell ddeugarn drawknifes cyllell ddeugarn drawn fabric embroidery brodwaith ffabrig drawn game gêm gyfartal drawn games gêm gyfartal drawn line llinelliad drawn lines llinelliad drawn thread embroidery brodwaith tynnu edau drawsheet cynfas dynnu drawsheets cynfas dynnu drawstring llinyn tynnu drawstrings llinyn tynnu dredge carthu dredger llong garthu (=dredging ship) dredger sgeintydd (for sprinkling) dredgers llong garthu (=dredging ship) dredgers sgeintydd (for sprinkling) dress ffrog (=frock) dress gwisg (=clothing) dress gwisgo dress trin (in cooking) dress placket opening agoriad placed ffrog dress placket openings agoriad placed ffrog dress sense chwaeth gwisgo dress senses chwaeth gwisgo dress shield pad chwys dress shields pad chwys dress the set gwisgo'r set dress the stage gwisgo'r llwyfan dress weight pwysau ffrog dresser dreser (furniture) dressers dreser (furniture) dressing dresin (for salad) dressing gorchudd (on wound) dressing gown gŵn tŷ dressing gowns gŵn tŷ dressing table bwrdd gwisgo dressing tables bwrdd gwisgo dressing up gwisgo dressings dresin (for salad) dressings gorchudd (on wound) dressmaker gwniyddes dressmaker's dummy model gwniyddes dressmaker's pin pìn bach dressmaker's pins pìn bach dressmakers gwniyddes dribble dribl (in sport) dribble driblo (in sport) dribble glafoerio (saliva) dribbler driblwr dribblers driblwr dribbles dribl (in sport) dried fruits ffrwythau sych dried milk llaeth powdr dried milks llaeth powdr drier sychydd driers sychydd drift drifft (longshore) drift drifftio (fishing) drift lluwch (of snow etc) drift net rhwyd ddrifft drift nets rhwyd ddrifft drift velocity cyflymder drifft drifter driffter (ship) drifters driffter (ship) drifting drifftio (forging process) drifting gwneud tyllau (of holes) drifts drifft (longshore) drifts lluwch (of snow etc) driftwood broc driftwoods broc drill dril drill drilio drill bit ebill dril drill bits ebill dril drill chuck crafanc dril drill chucks crafanc dril drill part rhan dril drill parts rhan dril drill size maint dril drill sizes maint dril drill socket soced dril drill sockets soced dril drill table bwrdd drilio drill tables bwrdd drilio driller driliwr drillers driliwr drilling capacity maint drilio drilling jig jig drilio drilling jigs jig drilio drilling machine peiriant drilio drilling machines peiriant drilio drills dril drinking chocolate siocled yfed drinking chocolates siocled yfed drip rings modrwyau drip tray hambwrdd diferu (for drip-dry and synthetics) drip-dry dripsych drip-dry dripsychu dripping toddion dripstone bargodfaen dripstones bargodfaen drive curo (a nail) drive dreif (in sport) drive gyriad (act of) drive gyriant (of car, computer etc) drive gyrru (in general) drive the ball dreifio'r bêl driver gyrrwr driver and driven gyrru a gyredig driver cell cell yrru driver cells cell yrru driver circuit cylched yrru driver circuits cylched yrru drivers gyrrwr drives dreif (in sport) drives gyriad (act of) drives gyriant (of car, computer etc) driving belt belt yrru driving belts belt yrru driving disk disg gyrru driving disks disg gyrru driving dog cariwr driving dogs cariwr driving fit ffit orwasg driving fits ffit orwasg driving plate plât troi driving plates plât troi drizzle glaw mân drizzles glaw mân drone drôn drone accompaniment cyfeiliant drôn drone accompaniments cyfeiliant drôn drone bass bas drôn drones drôn drop cwymp (=fall) drop diferu (of liquid) drop diferyn (of liquid) drop gollwng (a ball) drop forging delw ofannu drop goal gôl adlam drop goals gôl adlam drop kick cic adlam drop kicks cic adlam drop out adlamu allan (of ball) drop pattern patrwm disgyn drop patterns patrwm disgyn drop shot ergyd gwta drop shots ergyd gwta drop-down door drws gostwng drop-down doors drws gostwng drop-leaf table bwrdd dalen blyg drop-leaf tables bwrdd dalen blyg droplet defnyn droplet infection heintiad defnynnau droplet infections heintiad defnynnau droplets defnyn dropped ball pêl gwymp dropped balls pêl gwymp dropped shoulder ysgwydd isel dropped shoulders ysgwydd isel dropper diferydd droppers diferydd dropping funnel twndis diferu dropping funnels twndis diferu dropping the atomic bomb gollwng y bom atomig drops cwymp (=fall) drops diferyn (of liquid) drops of blood dafnau gwaed drops of moisture dafnau hylif dross amhuredd drought sychder droughts sychder drover porthmon drovers porthmon drowned valley dyffryn boddedig drowsy swrth drug cyffur drug abuse camddefnyddio cyffuriau drug addiction caethiwed i gyffuriau drug addictions caethiwed i gyffuriau drug administration gweini cyffuriau drug dependency dibyniaeth ar gyffuriau drug levels lefelau cyffuriau drug resistance ymwrthiant cyffuriau drug resistances ymwrthiant cyffuriau drugs cyffur drugs and alcohol cyffuriau ac alcohol druid derwydd druidism derwyddiaeth druidisms derwyddiaeth druids derwydd drum drwm drum and sticks drwm a ffyn drum kit offer drymiau drum printer argraffydd drwm drum printers argraffydd drwm drum roll bwrlwm drwm drum rolls bwrlwm drwm drumlin drymlin drumlins drymlin drummer drymiwr drummers drymiwr drums drwm drunk meddw drunk meddwyn drunken saw llif chwil drunken saws llif chwil drunken screw sgriw chwil drunken screws sgriw chwil drunken thread edau chwil drunken threads edau chwil drunks meddwyn drupe drŵp drupes drŵp druxiness marc gwyn mewn pren dry sych dry sychu dry brush brwsh sych dry brushs brwsh sych dry cleaned sychlan dry cleaners sychlanhawyr dry cleaning sychlanhau dry colourant lliwydd sych dry colourants lliwydd sych dry frying ffrio sych dry point engraving ysgythriad sychbwynt dry point engravings ysgythriad sychbwynt dry point site safle sych dry point sites safle sych dry rot pydredd sych dry rots pydredd sych dry run rhediad ffug dry runs rhediad ffug dry transfer lettering llythrennu troslun sych dry valley dyffryn sych dry weight pwysau sych dry-bright polish llathr disgleirsych dry-bright polishs llathr disgleirsych drying agent cyfrwng sychu drying agents cyfrwng sychu drying cabinet cwpwrdd sychu drying cabinets cwpwrdd sychu drying process proses sychu drying rack rhesel sychu drying racks rhesel sychu drying time amser sychu drying times amser sychu drypoint etching ysgythru sychbwynt dual deuol dual alliance cynghrair ddeublyg dual alliances cynghrair ddeublyg dual carriageway ffordd ddeuol dual ownership perchenogaeth ddeublyg dual ownerships perchenogaeth ddeublyg dual purpose pwrpas deublyg dual purposes pwrpas deublyg dual sensory impairment nam ar ddau synnwyr dual sensory impairments nam ar ddau synnwyr dualism deuoliaeth dualisms deuoliaeth dubbing tros-seinio (of sound) dubbing trosleisio (of speech translation) ducal dugol duchess duges duchesse set matiau duchesse duchy dugaeth duck hwyaden duck dive deif hwyaden duck dives deif hwyaden duck-board bwrdd cerdded duck-boards bwrdd cerdded ducking dowcio ducking stool stôl drochi ducking stools stôl drochi ducks hwyaden duct dwythell ductile hydwyth ductility hydwythedd ductless diddwythell ductless gland chwarren ddiddwythell ductless glands chwarren ddiddwythell ducts dwythell duel gornest duels gornest duet deuawd duets deuawd dugout twll ymochel dugouts twll ymochel duke dug dukedom dugaeth dukedoms dugaeth dukes dug dukka dukka (=dukha) dukkas dukka (=dukha) dulciana dulciana dulcianas dulciana dulcimer dwlsimer dulcimers dwlsimer dulcitone dylsiton dulcitones dylsiton duly yn briodol (=as is right) duma dwma dumas dwma dumb child plentyn mud dumb childs plentyn mud dumb terminal terfynell fud dumb terminals terfynell fud dummy dymi (for sucking) dummy ffugiad (=false pass) dummy ffugio dummy pipe pibell fud (on organ) dummy pipes pibell fud (on organ) dump dympio dump tomen dumpling twmplen dumplings twmplen dumps tomen dune twyn dune community cymuned dwyni dune slack llac twyni dune slacks llac twyni dunes twyn dungarees dyngarîs dungeon dwnsiwn dungeons dwnsiwn duodecimal deuddegol duodenum dwodenwm duodenums dwodenwm duple dyblyg duple minor set set ddeubar duple minor sets set ddeubar duple time amser dau duple times amser dau duplet dwbled duplets dwbled duplex dwplecs duplexes dwplecs duplicate dyblyg duplicate dyblygeb duplicate dyblygu duplicates dyblygeb duplication dyblygiad duplications dyblygiad durability gwydnwch durable gwydn durable colour lliw sy'n para durable colours lliw sy'n para durable goods nwyddau sy'n para duralumin dwralwmin duralumins dwralwmin duramen dwramen duramens dwramen duration amser parhad (of heart beat) duration parhad durations amser parhad (of heart beat) durations parhad duricrust cramen galed duricrusts cramen galed dust llwch dust tynnu llwch dust board bwrdd llwch (drawer) dust boards bwrdd llwch (drawer) dust bowl powlen lwch dust bowls powlen lwch dust devil cythraul llwch dust devils cythraul llwch dust free atmosphere atmosffer di-lwch dust free atmospheres atmosffer di-lwch dust particle gronyn llwch dust particles gronyn llwch dust-free di-lwch dust-proof rhydd o lwch dustbin bin sbwriel dustbins bin sbwriel dustpan padell lwch dustpans padell lwch dusts llwch dusty llychlyd duty toll (=tax) duty of care dyletswydd gofal duty officer swyddog dyletswydd duty officers swyddog dyletswydd duumvir deuwriad duumvirate deuwraeth duumvirates deuwraeth duumvirs deuwriad duvet duvet duvets duvet duxelles duxelles dwarf pea corbysen dwarf peas corbysen dwarf plant corblanhigyn dwarf plants corblanhigyn dwarf shrub corwrych dwarf shrubs corwrych dwarf star seren gorrach dwarf stars seren gorrach dwarf willow corhelygen dwarf willows corhelygen dwarfism corachedd dwarfisms corachedd dwell angle ongl breswyl dwell angles ongl breswyl dwelling annedd dwellings annedd dyad deuad dyads deuad dye llifo dye llifyn dye fix sefydlyn llifyn dye fixes sefydlyn llifyn dye loss colli llifyn dye pick-up codi llifyn dyebath baddon llifo dyebaths baddon llifo dyed llifedig dyed cane gwialen liw dyed canes gwialen liw dyed hessian hesian llifedig dyed hessians hesian llifedig dyed seagrass morwellt llifedig dyed string llinyn llifedig dyed strings llinyn llifedig dyestuff defnydd llifo dyestuffs defnydd llifo dyke clawdd (=wall) dyke deic (in geology) dyke ffos (=ditch) dyke morglawdd (=sea wall) dyke swarm clwstwr deiciau dyke swarms clwstwr deiciau dykes clawdd (=wall) dykes deic (in geology) dykes ffos (=ditch) dykes morglawdd (=sea wall) dynamic dynamig dynamic allocation dyrannu dynamig dynamic data structure strwythur data dynamig dynamic data structures strwythur data dynamig dynamic equilibrium ecwilibriwm dynamig dynamic equilibriums ecwilibriwm dynamig dynamic memory cof dynamig dynamic random access memory cof hapgyrch dynamig (DRAM) dynamic screen sgrin ddynamig dynamic screens sgrin ddynamig dynamic store storfa ddynamig dynamic stores storfa ddynamig dynamical dynamegol dynamics dynameg dynamite dynameit dynamites dynameit dynamo dynamo dynamometer dynamometr dynamometers dynamometr dynastic llinachyddol dynasticism llinachyddiaeth dynasticisms llinachyddiaeth dynasty llinach dynatron dynatron dynatrons dynatron dysarthria parlys lleferydd dysarthrias parlys lleferydd dysentery dysentri dysfluency diffyg rhuglder dysfunction camweithrediad dysfunctions camweithrediad dyslexia dyslecsia dyslexias dyslecsia dyslexic dyslecsig dyspepsia diffyg traul dyspepsias diffyg traul dyspeptic dyspeptig dysphasia dysffasia dysphasias dysffasia dyspnoea dyspnoea dyspnoeas dyspnoea dysprosium dysprosiwm (Dy) dysprosiums dysprosiwm (Dy) dystrophic camfaethol dystrophy nychdod (in physiology) début début débuts début décor décor décors décor e-mail e-bost (of medium) e-mail e-hebiaeth (of mail sent or received) e-mail e-hebu (=correspond by email) e-mails e-bost (of medium) e-mails e-hebiaeth (of mail sent or received) eager awyddus ear clust ear discharge rhedlif clust ear discharges rhedlif clust ear drum tympan y glust ear drums tympan y glust ear flick plwc clust ear flicks plwc clust ear ossicle esgyrnyn y glust ear ossicles esgyrnyn y glust earache clust dost earaches clust dost eardrum pilen y glust eardrums pilen y glust earl iarll earldom iarllaeth earldoms iarllaeth earls iarll early adolescence llencyndod cynnar early adolescences llencyndod cynnar early adopter mabwysiadwr cynnar early adopters mabwysiadwr cynnar early childhood plentyndod cynnar early childhoods plentyndod cynnar early history hanes cynnar early modern history hanes modern cynnar early modern period cyfnod modern cynnar early modern periods cyfnod modern cynnar early modern world byd modern cynnar early modern worlds byd modern cynnar early peoples pobloedd cynnar early years blynyddoedd cynnar early years education service gwasanaeth addysg blynyddoedd cynnar early years education services gwasanaeth addysg blynyddoedd cynnar early years learning dysgu blynyddoedd cynnar early years worker gweithiwr blynyddoedd cynnar early years workers gweithiwr blynyddoedd cynnar earmark clustnodi earmarked funding cyllid a glustnodwyd earmarked fundings cyllid a glustnodwyd earned income incwm gwaith earned incomes incwm gwaith earnings enillion earphone ffôn clust earphones ffôn clust earring clustdlws earrings clustdlws earth daear (of land) earth daearu earth pridd (=soil) earth flow tirlif earth flows tirlif earth movement symudiad daear earth movements symudiad daear earth tremor daeargryd earth tremors daeargryd earth wire gwifren ddaearu earth wires gwifren ddaearu earthenware llestri pridd earthing daearu earthquake daeargryn earthquake hazard perygl o ddaeargryn earthquake hazards perygl o ddaeargryn earthquakes daeargryn earths daear (of land) earths pridd (=soil) earthshine llewyrch daear earthshines llewyrch daear earthwork gwrthglawdd earthworks gwrthglawdd ease esmwythder ease esmwytho (easing of fullness) ease lleddfu ease of flow rhwyddineb llifo ease of formation rhwyddineb ffurfiant easel îsl easel tray hambwrdd îsl easels îsl eases esmwythder east dwyrain eastern margins glandiroedd dwyreiniol easting dwyreiniad eastings dwyreiniad easts dwyrain easy hawdd easy solder sodr rhwydd easy solders sodr rhwydd easy-flo solder sodr llifrwydd easy-flo solders sodr llifrwydd eaves bondo ebb trai ebonizing eboneiddio ebony eboni ebony stain staen eboni ebony stains staen eboni ebullioscopic ebwliosgopig ebullioscopy ebwliosgopaeth ebullition byrlymu eccentric echreiddig (of geometrical figures, ellipses) eccentric centre allganol eccentric centres allganol eccentric circle allgylch eccentric circles allgylch eccentric disc disg echreiddig eccentric discs disg echreiddig eccentricity echreiddiad ecclesiastical eglwysig ecclesiastical canon canon eglwysig ecclesiastical canons canon eglwysig ecclesiastical embroidery brodwaith eglwysig ecclesiastical history hanes eglwysig ecclesiastical mode modd eglwysig ecclesiastical modes modd eglwysig ecclesiasticism eglwysyddiaeth ecclesiasticisms eglwysyddiaeth ecdysis ecdysis echelon echelon echelon form ffurf echelon echelon forms ffurf echelon echelons echelon echinoderm echinoderm echinoderms echinoderm echo atsain echo atseinio echo chorus côr atsain echo game gêm atsain echo games gêm atsain echo organ organ atsain echo organs organ atsain echolalia ecolalia echolalias ecolalia echolalic speech lleferydd ecolalig echolalic speeches lleferydd ecolalig eclair eclair eclairs eclair eclectic eclectig eclipse diffyg (of sun, moon) eclipsed conformation cydffurfiad gorchuddiedig eclipsed conformations cydffurfiad gorchuddiedig eclipses diffyg (of sun, moon) ecliptic ecliptig ecliptic plane plân ecliptig ecliptic planes plân ecliptig eclogue bugeilgerdd eclogues bugeilgerdd ecocline ecoclin ecoclines ecoclin ecological ecolegol ecological pattern patrwm ecolegol ecological patterns patrwm ecolegol ecology ecoleg econometrics econometreg economic economaidd economic activity gweithgaredd economaidd economic and industrial understanding dealltwriaeth economaidd a diwydiannol economic and industrial understandings dealltwriaeth economaidd a diwydiannol economic cost cost economaidd economic costs cost economaidd economic development datblygu economaidd economic factor ffactor economaidd economic factors ffactor economaidd economic goods nwyddau economaidd economic growth twf economaidd economic growths twf economaidd economic history hanes economaidd economic prosperity ffyniant economaidd economic recovery adferiad economaidd economic rent rhent economaidd economic rents rhent economaidd economical darbodus (=frugal) economically developing country gwlad sy'n datblygu'n economaidd economics economeg economics of education economeg addysgu economies of scale darbodion maint economist economegydd economists economegydd economize gwneud arbedion economy economi ecospecies ecorywogaeth ecosystem ecosystem ecosystems ecosystem ecotone cyffindir ecotone ecotôn ecotones cyffindir ecotones ecotôn ecotype ecoteip ecotypes ecoteip ectoderm ectoderm ectoderms ectoderm ectoparasite ectoparasit ectoparasites ectoparasit ectoplasm ectoplasm ectoplasms ectoplasm ecumene byd cyfannedd, y ecumenes byd cyfannedd, y ecumenical eciwmenaidd ecumenical movement mudiad eciwmenaidd ecumenical movements mudiad eciwmenaidd ecumenism eciwmeniaeth ecumenisms eciwmeniaeth eczema ecsema eczemas ecsema edaphic edaffig eddy trolif eddy trolifo eddy current cerrynt trolif eddy currents cerrynt trolif edge min (=sharpness) edge ymyl (=rim, side) edge ymylu edge detection canfod ymyl edge guide ffin-ganllaw edge guides ffin-ganllaw edge joint uniad ymyl edge jointing ymyluno edge joints uniad ymyl edge mark marc ymyl edge marks marc ymyl edge stitch ymylbwytho edge to edge ymyl wrth ymyl edge treatment triniaeth ymyl edge treatments triniaeth ymyl edged tools offer miniog edges min (=sharpness) edges ymyl (=rim, side) edging ymylwaith edgings ymylwaith edict cyhoeddeb edicts cyhoeddeb edit golygu edition argraffiad editions argraffiad editor golygydd editors golygydd educability addysgedd educable addysgadwy education addysg education authority awdurdod addysg education committee pwyllgor addysg education committees pwyllgor addysg education officer swyddog addysg education officers swyddog addysg education priority area ardal o flaenoriaeth addysgol education priority areas ardal o flaenoriaeth addysgol education welfare officer swyddog lles addysg education welfare officers swyddog lles addysg educational addysgol educational advantage mantais addysgol educational advantages mantais addysgol educational approach dull addysgol educational approaches dull addysgol educational development datblygiad addysgol educational developments datblygiad addysgol educational facilities cyfleusterau addysgol educational guidance cyfarwyddyd addysgol educational guidances cyfarwyddyd addysgol educational gymnastics gymnasteg addysgol educational needs anghenion addysgol educational psychologist seicolegydd addysg educational psychologists seicolegydd addysg educational quotient cyniferydd addysgol educational quotients cyniferydd addysgol educational support grant grant cynnal addysg educational support grants grant cynnal addysg educational toy tegan addysgol educationalist addysgwr educationalists addysgwr educations addysg educative addysgiadol educe edwytho eduction edwythiad eductions edwythiad eel llysywen eelpout gweflogyn eelpouts gweflogyn effect effaith effect of frequency effaith amledd effect of pollution effaith llygredd effective effeithiol effective movement symudiad effeithiol effective movements symudiad effeithiol effective performance perfformiad effeithiol effective performances perfformiad effeithiol effective rainfall glawiad effeithiol effective rainfalls glawiad effeithiol effective response ymateb effeithiol effective responses ymateb effeithiol effectiveness effeithiolrwydd effector effeithydd effectors effeithydd effects effaith efferent echddygol efferent nerve nerf echddygol efferent nerves nerf echddygol efferent neuron niwron echddygol efferent neurons niwron echddygol effervesce eferwi effervescence eferwad effervescences eferwad effervescing eferwol efficiency effeithlonrwydd (in general) efficiency and effectiveness effeithlonrwydd ac effeithiolrwydd efficiency savings arbedion effeithlonrwydd efficient effeithlon efficient cause achos effeithlon efficient causes achos effeithlon effigy arddelw efflorescence ewlychiad efflorescences ewlychiad efflorescent ewlychol effluence elifiant effluences elifiant effluent carthffrwd (of sewage) effluent elifol effluent elifyn (in general) effluents carthffrwd (of sewage) effluents elifyn (in general) effort ymdrech efforts ymdrech egalitarian egalitaraidd egalitarian egalitariad egalitarianism egalitariaeth egalitarianisms egalitariaeth egalitarians egalitariad egest carthu egestion allfwrw (amoeba) egestion carthiad (digestive tract) egestions carthiad (digestive tract) egg wy egg and dart treatment addurn wy a saethell egg and dart treatments addurn wy a saethell egg cup cwpan wy egg cups cwpan wy egg custard cwstard wy egg custard sauce saws cwstard wy egg custard sauces saws cwstard wy egg custard tart tarten gwstard wy egg custard tarts tarten gwstard wy egg custards cwstard wy egg formation ffurfiant wy egg formations ffurfiant wy egg membrane pilen wy egg membranes pilen wy egg nucleus cnewyllyn wy egg shape ar ffurf wy egg tempera tempera wy egg temperas tempera wy egg yolk melynwy egg yolks melynwy egg-shaped head pen ffurf wy egg-shaped heads pen ffurf wy eggshell plisgyn wy eggshell finish gorffeniad plisgyn wy eggshell finishs gorffeniad plisgyn wy eggshell paint paent plisgyn wy eggshell paints paent plisgyn wy eggshell porcelain porslen plisgyn wy eggshell porcelains porslen plisgyn wy eggshells plisgyn wy egocentric myfïol egocentricity myfïaeth eiderdown cwrlid plu eiderdowns cwrlid plu eigen function ffwythiant eigen eigen functions ffwythiant eigen eigen value gwerth eigen eigen values gwerth eigen eigen vector fector eigen eigen vectors fector eigen eight wyth eight wythwr (of person) eight bit buffer byffer wyth did eight bit buffers byffer wyth did eight points of the compass wyth pwynt y cwmpawd eighth wythfed (interval) eighth-note nodyn wyth (quaver) eighth-notes nodyn wyth (quaver) eighths wythfed (interval) eights wyth eights wythwr (of person) einsteinium einsteiniwm (Es) einsteiniums einsteiniwm (Es) eisteddfod eisteddfod eisteddfods eisteddfod either way offence trosedd neillfordd either way offences trosedd neillfordd ejaculate alldaflu ejaculation alldafliad (in physiology) ejaculations alldafliad (in physiology) ejaculatory alldaflol eject bwrw allan ejection allfwriad ejections allfwriad ejector drift drifft llacio ejector drifts drifft llacio ekistics anheddeg elaborate coeth (of work of art) elaborate coethi (a work of art) elaborate manwl (=detailed) elaborate manylu (=detail) elapsed time amser a aeth heibio elapsed times amser a aeth heibio elastic elastig elastic band band elastig elastic bands band elastig elastic energy egni elastig elastic fibre ffibr elastig elastic fibres ffibr elastig elastic limit terfan elastig elastic limits terfan elastig elastic potential energy egni potensial elastig elastic recoil adlamiad elastig elastic recoils adlamiad elastig elastic scattering gwasgariad elastig elastic scatterings gwasgariad elastig elasticity elastigedd (of material, in economics) elasticity of demand elastigedd y galw elastics elastig elastine elastin elastines elastin elastomeric elastomerig elastomers elastomerau elation ymlediad (in physics) elations ymlediad (in physics) elbow penelin elbow joint cymal penelin elbow joints cymal penelin elbow of capture elin ladrad elbows penelin elder henuriad elder statesman gwladweinydd hŷn elder statesmans gwladweinydd hŷn elderly henoed elderly oedrannus elderly visitor ymwelydd oedrannus elderly visitors ymwelydd oedrannus elders henuriad elect ethol elect etholedig elect etholedig rai election etholiad elections etholiad elective monarchy brenhiniaeth etholedig elective mutism dewis peidio â siarad elector etholwr electoral etholiadol electoral machinery peirianwaith etholiadol electoral reform diwygio etholiadol electoral representation cynrychiolaeth etholiadol electoral representations cynrychiolaeth etholiadol electoral system trefn etholiadol electoral systems trefn etholiadol electorate etholwyr electors etholwr electric trydan electric trydanol electric arc furnace ffwrnais arc drydan electric arc furnaces ffwrnais arc drydan electric arc welding weldio arc drydan electric blanket blanced drydan electric blankets blanced drydan electric blue glas trydan (enamelling colour) electric blues glas trydan (enamelling colour) electric circuit cylched drydanol electric circuits cylched drydanol electric current cerrynt trydan electric currents cerrynt trydan electric drill dril trydan electric drills dril trydan electric element elfen drydan electric elements elfen drydan electric field line llinell faes drydanol electric field lines llinell faes drydanol electric field meter mesurydd maes trydanol electric field meters mesurydd maes trydanol electric finishing stove stof orffennu drydan electric finishing stoves stof orffennu drydan electric flex fflecs drydan electric flexes fflecs drydan electric force of attraction grym atyniad trydanol electric force of repulsion grym gwrthyriad trydanol electric fuse ffiws trydan electric fuses ffiws trydan electric guitar gitâr drydan electric guitars gitâr drydan electric iron haearn trydan electric irons haearn trydan electric kiln odyn drydan electric kilns odyn drydan electric motor modur trydan electric motors modur trydan electric musical instrument offeryn cerdd trydan electric musical instruments offeryn cerdd trydan electric organ organ drydan electric organs organ drydan electric plane plaen trydan electric planes plaen trydan electric plug plwg trydan electric plugs plwg trydan electric potential difference gwahaniaeth potensial trydanol electric potential differences gwahaniaeth potensial trydanol electric power pŵer trydanol electric power point pwynt trydan electric power points pwynt trydan electric powers pŵer trydanol electric shock sioc drydan electric shocks sioc drydan electric socket soced trydan electric sockets soced trydan electric spot welding sbotweldio trydan electric storage heater gwresogydd stôr trydan electric storage heaters gwresogydd stôr trydan electric terminal terfynell drydan electric terminals terfynell drydan electrical trydanol electrical appliance dyfais drydanol electrical appliances dyfais drydanol electrical component cydran drydanol electrical components cydran drydanol electrical generator generadur trydan electrical generators generadur trydan electrical insulator ynysydd trydanol electrical insulators ynysydd trydanol electrical resistance gwrthiant trydanol electrical resistances gwrthiant trydanol electrician trydanwr electrician's insulated pliers gefelen ynysedig trydanwr electrician's screwdriver tyrnsgriw trydanwr electrician's screwdrivers tyrnsgriw trydanwr electricians trydanwr electricity trydan electricity supply cyflenwad trydan electricity transmission line lein trawsyrru trydan electricity transmission lines lein trawsyrru trydan electrics trydan electrify trydanu electroacoustic equipment cyfarpar electroacwstig electroacoustic equipments cyfarpar electroacwstig electrochemical electrocemegol electrochemical electrocemegyn electrochemical equivalent cywerth electrocemegol electrochemical equivalents cywerth electrocemegol electrochemicals electrocemegyn electrode electrod electrodes electrod electrolyse electroleiddio electrolysis electrolysis electrolyte electrolyt electrolytes electrolyt electrolytic electrolytig electrolytic capacitor cynhwysydd electrolytig electrolytic capacitors cynhwysydd electrolytig electrolytic reaction adwaith electrolytig electrolytic reactions adwaith electrolytig electromagnetic electromagnetig electromagnetic induction anwythiad electromagnetig electromagnetic inductions anwythiad electromagnetig electromagnetic radiation pelydriad electromagnetig electromagnetic radiations pelydriad electromagnetig electromagnetic spectrum sbectrwm electromagnetig electromagnetic spectrums sbectrwm electromagnetig electromagnetism electromagnetedd (phenomenon) electromagnetism electromagneteg (study of) electromagnetisms electromagnetedd (phenomenon) electromagnetisms electromagneteg (study of) electrometer electromedr electrometers electromedr electromotive force grym electromotif (emf) electromotive forces grym electromotif (emf) electron electron electron acceptor derbynnydd electronau electron acceptors derbynnydd electronau electron affinity affinedd electronol electron carrier cludydd electronau electron carriers cludydd electronau electron cloud cwmwl electronau electron cloud overlap gorgyffyrddiad cymylau electronau electron cloud overlaps gorgyffyrddiad cymylau electronau electron clouds cwmwl electronau electron configuration ffurfwedd electronau electron configurations ffurfwedd electronau electron delocalization dadleoliad electronau electron delocalizations dadleoliad electronau electron density distribution dosbarthiad dwysedd electronau electron density distributions dosbarthiad dwysedd electronau electron diffraction diffreithiant electronau electron diffractions diffreithiant electronau electron donor cyfrannydd electronau electron donors cyfrannydd electronau electron flow llif electronau electron flows llif electronau electron in bound state electron mewn cyflwr rhwym electron lens lens electronau electron microscope electronmicrosgop electron microscopes electronmicrosgop electron pair repulsion theory damcaniaeth gwrthyriad parau electron electron shell plisgyn electronau electron shells plisgyn electronau electron stream llif electronau electron streams llif electronau electron-deficient electron-ddiffygiol electronegative electronegatif electronegativity electronegatifedd electronic electronig electronic circuit cylched electronig electronic circuits cylched electronig electronic communicator cyfathrebwr electronig electronic communicators cyfathrebwr electronig electronic computer cyfrifiadur electronig electronic computers cyfrifiadur electronig electronic conduction dargludiad electronig electronic conductions dargludiad electronig electronic configuration ffurfwedd electronig electronic configurations ffurfwedd electronig electronic data interchange ymgyfnewid data electronig electronic data interchange EDI link cyswllt ymgyfnewid data electronig EDI electronic data interchange EDI links cyswllt ymgyfnewid data electronig EDI electronic data processing prosesu data electronig (EDP) electronic equipment offer electronig electronic funds transfer trosglwyddo cyfalaf electronig electronic information gwybodaeth electronig electronic informations gwybodaeth electronig electronic keyboard allweddell electronig electronic keyboards allweddell electronig electronic machine peiriant electronig electronic machines peiriant electronig electronic mail ehebiaeth (correspondence) electronic mails ehebiaeth (correspondence) electronic news gathering casglu newyddion yn electronig electronic organ organ electronig electronic organs organ electronig electronic sound sain electronig electronic sounds sain electronig electronic structure adeiledd electronig electronic structures adeiledd electronig electronics electroneg electronmicrograph electronmicrograff electronmicrographs electronmicrograff electrons electron electrophile electroffil electrophiles electroffil electrophilic addition adiad electroffilig electrophilic additions adiad electroffilig electrophoresis electrofforesis electrophorus electrofforws electroplate electroplat electroplate electroplatio electroplates electroplat electropositive electropositif electropositivity electropositifedd electroreceptor electrondderbynydd electroreceptors electrondderbynydd electroscope electrosgop electroscopes electrosgop electrostatic electrostatig electrostatic attraction atyniad electrostatig electrostatic attractions atyniad electrostatig electrostatic charge gwefr electrostatig electrostatic charges gwefr electrostatig electrostatic induction anwythiad electrostatig electrostatic inductions anwythiad electrostatig electrostatic phenomenon ffenomen electrostatig electrostatic phenomenons ffenomen electrostatig electrostatic potential potensial electrostatig electrostatic potentials potensial electrostatig electrostatics electrostateg electrovalent electrofalent elegy galargan element elfen element of competence elfen cymhwysedd elemental elfennaidd elementary elfennol elementary education addysg elfennol elementary educations addysg elfennol elementary entity unffurfedd elfennol elementary particle gronyn elfennol elementary particles gronyn elfennol elementary school ysgol elfennol elementary schools ysgol elfennol elements elfen elements of painting elfennau peintio elevation codiad (of boiling point) elevation golwg (of drawing) elevation view golwg anghyflawn elevation views golwg anghyflawn elevations codiad (of boiling point) elevations golwg (of drawing) elevator codwr (for grain) elevators codwr (for grain) eleven a side game gêm un ar ddeg bob ochr eleven a side games gêm un ar ddeg bob ochr eleventh unfed ar ddeg (interval) elevenths unfed ar ddeg (interval) elfinwood ellyllbren elfinwoods ellyllbren eligible cymwys eliminant dilëydd eliminants dilëydd eliminate dileu elimination bwrw allan (in biology) elimination dilead (in chemistry) elimination gwaredu (from the body) elimination by substitution dileu drwy amnewid elimination print dileubrint elimination printing dileubrintio elimination prints dileubrint elimination reaction adwaith dileu (in chemistry) elimination reactions adwaith dileu (in chemistry) eliminations dilead (in chemistry) elite elit elite elitaidd elites elit elitism elitaeth elitisms elitaeth elitist elitydd elitists elitydd ellipse elips ellipses elips ellipsoid elipsoid ellipsoidal elipsoidol ellipsoids elipsoid elliptic eliptig elliptical eliptigol elliptical arch bwa eliptigol elliptical arches bwa eliptigol elliptical flange fflans eliptigol elliptical flanges fflans eliptigol elongate hwyhau elongated hirgul elongation hwyhad elongations hwyhad eluent echludydd eluents echludydd elute echludo elution echludiad elutions echludiad eluvial echlifol eluviation echlifiant eluviations echlifiant emancipate rhyddfreinio emancipation rhyddfreiniad emancipation of the serfs rhyddfreinio'r taeogion emancipations rhyddfreiniad embargo gwaharddiad embark byrddio embassy llysgenhadaeth embayment amfae embayments amfae embed mewnblannu embedded character nod wedi'i fewnblannu embedded characters nod wedi'i fewnblannu embellishment addurniad embellishments addurniad emblem arwyddlun emblems arwyddlun emboss boglynnu embossed boglynnog embossed wallpaper papur boglynnog embossed wallpapers papur boglynnog embossing boglynwaith embossings boglynwaith embracery rhaithymyrraeth embroider brodio embroidered collage collage brodwaith embroidered collages collage brodwaith embroidered lace les wedi'i frodio embroidered laces les wedi'i frodio embroidered textiles tecstilau wedi'u brodio embroidery brodwaith embroidery cotton edau frodwaith embroidery cottons edau frodwaith embroidery frame ffrâm frodio embroidery frames ffrâm frodio embroidery needle nodwydd frodio embroidery needles nodwydd frodio embroidery scissors siswrn brodio embroidery thread edau frodio embroidery threads edau frodio embroidery wool gwlân brodio embroidery wools gwlân brodio embryo embryo embryo dune egin-dwyn embryo dunes egin-dwyn embryo sac coden embryo embryo sacs coden embryo emerald emrallt emeralds emrallt emerge dod allan emerged cyfodol emergency argyfwng emergency brys emergency protection order gorchymyn amddiffyn brys emergency protection orders gorchymyn amddiffyn brys emergency stop stop brys emergency stops stop brys emergent allddodol emergent beam paladr allddodol emergent beams paladr allddodol emergent nation cenedl ddatblygol emergent nations cenedl ddatblygol emery emeri emery cloth clwt emeri emery cloths clwt emeri emery paste past emeri emery pastes past emeri emery powder powdr emeri emery powders powdr emeri emery wheel olwyn emeri emery wheels olwyn emeri emetic cyfoglyn emetics cyfoglyn emigrant ymfudwr emigrants ymfudwr emigrate ymfudo emission spectroscopy sbectrosgopeg allyriant emission spectrum sbectrwm allyrru emission spectrums sbectrwm allyrru emissivity allyrredd emit allyrru emitter allyrrydd emitters allyrrydd emotion emosiwn emotionable stability sefydlogrwydd emosiynol emotional emosiynol emotional abuse camdriniaeth emosiynol emotional abuses camdriniaeth emosiynol emotional and behavioural difficulties anawsterau ymddygiad ac emosiwn emotional and social development datblygiad emosiynol a chymdeithasol emotional and social developments datblygiad emosiynol a chymdeithasol emotional deprivation amddifadiad emosiynol emotional deprivations amddifadiad emosiynol emotional development datblygiad emosiynol emotional developments datblygiad emosiynol emotional disturbance cythrwfl emosiynol emotional disturbances cythrwfl emosiynol emotions emosiwn empathy empathi emperor ymerawdwr emperors ymerawdwr emphasis pwyslais emphasise pwysleisio emphasized pwysleisiol empire ymerodraeth empires ymerodraeth empirical empirig empirical formula fformiwla empirig empirical formulas fformiwla empirig empirical investigation ymchwiliad empirig empirical investigations ymchwiliad empirig empirical method dull empirig empirical methods dull empirig empiricism empiriaeth empiricisms empiriaeth empiricist empirydd empiricists empirydd employ cyflogi employability cyflogadwyedd employable cyflogadwy employed cyflogedig employee gweithiwr (=worker, staff member) employee gweithiwr cyflogedig (=paid worker) employee organisation cymdeithas i weithwyr employee organisations cymdeithas i weithwyr employees gweithiwr (=worker, staff member) employees gweithiwr cyflogedig (=paid worker) employer cyflogwr employer employee relations cysylltiadau rhwng y cyflogwr a'r gweithwyr employers cyflogwr employment cyflogaeth employment appeal tribunal tribiwnlys apêl cyflogaeth employment appeal tribunals tribiwnlys apêl cyflogaeth employment contract contract cyflogaeth employment contracts contract cyflogaeth employment exchange swyddfa gyflogi employment exchanges swyddfa gyflogi employments cyflogaeth empower awdurdodi (=authorize) empower rhoi grym (clients) empowerment model model rhoi grym empowerment models model rhoi grym empress ymerodres emulate efelychu emulator efelychydd emulators efelychydd emulsification emwlseiddio emulsifier emwlsydd emulsifiers emwlsydd emulsify emwlsio emulsion paint paent emwlsiwn emulsion paints paent emwlsiwn emulsion polish llathr emwlsiwn emulsion polishs llathr emwlsiwn enable galluogi enable interrupts galluogi ymyriadau enabler galluogwr enablers galluogwr enabling act deddf alluogi enabling acts deddf alluogi enabling signal signal galluogi enabling signals signal galluogi enactive thinking meddwl enactif enamel enamel enamel enamlo enamel chips sglodion enamel enamel paint paent enamel enamel paints paent enamel enamel thread edau enamel enamel threads edau enamel enamelled enamlog enamelling colour lliw enamlo enamelling colours lliw enamlo enamelling kiln odyn enamlo enamelling kilns odyn enamlo enamels enamel enantiomer enantiomer enantiomers enantiomer enantiomorph enantiomorff enantiomorphs enantiomorff encampment gwersyllfan encampments gwersyllfan encapsulation mewngapsiwleiddio encaustic llosgliw encaustic tile teilsen losgliw encaustic tiles teilsen losgliw encircle amgylchynu encirclement amgylchyniad encirclements amgylchyniad enclave clofan enclaves clofan enclose amgáu (in letter) enclose cau (land etc) enclosed amgaeedig enclosed choir organ organ gôr gaeedig enclosed choir organs organ gôr gaeedig enclosed land tir caeedig enclosed lands tir caeedig enclosed solo organ organ solo gaeedig enclosed solo organs organ solo gaeedig enclosure lloc (archaeological) enclosure tir caeedig (=enclosed land) enclosure movement mudiad cau tiroedd enclosure movements mudiad cau tiroedd enclosures lloc (archaeological) enclosures tir caeedig (=enclosed land) encode amgodio encompass cwmpasu encourage annog encroach llechfeddiannu (upon rights) encroachment llechfeddiant (of rights) encroachments llechfeddiant (of rights) encrypt amgryptio encyclical cylchlythyr y Pab (papal) encyclicals cylchlythyr y Pab (papal) encyclopaedia gwyddoniadur encyclopaedias gwyddoniadur encyclopaedist gwyddoniadurwr encyclopaedists gwyddoniadurwr encysted cystiedig end elevation ochrolwg end elevations ochrolwg end face wyneb pen end faces wyneb pen end grain graen pen end grains graen pen end milling cutter melinwr ochr end milling cutters melinwr ochr end moraine marian terfynol end moraines marian terfynol end of dance diwedd dawns end of data diwedd y data end of field diwedd maes end of file diwedd ffeil end of job diwedd gorchwyl end of record diwedd cofnod end of run diwedd rhediad end of table talcen bwrdd end of tape diwedd tâp end of the race diwedd y ras end organ terfynolyn end organs terfynolyn end paper papur terfyn end papers papur terfyn end play llacrwydd y pen end point pwynt terfyn end point titration diweddbwynt end point titrations diweddbwynt end points pwynt terfyn end product cynnyrch terfynol end product inhibition ataliad gan gynnyrch terfynol end product inhibitions ataliad gan gynnyrch terfynol end products cynnyrch terfynol end view ochrolwg end views ochrolwg end-cutting nipper niper torri blaen end-cutting nippers niper torri blaen end-of-module test prawf diwedd modiwl end-of-module tests prawf diwedd modiwl end-point diweddbwynt end-points diweddbwynt endemic endemig endergonic endergonig endive endif endives endif endocarp endocarp endocarps endocarp endocrine endocrinaidd endocrine gland chwarren endocrin endocrine glands chwarren endocrin endocrine system system endocrin endocrine systems system endocrin endocrinology endocrinoleg endocycle endoseicl endocycles endoseicl endocyst endocyst endocysts endocyst endodermal endodermaidd endogenesis mewndarddiad endogenous mewndarddol endolymph endolymff endolymphs endolymff endometrium endometriwm endometriums endometriwm endomorphic endomorffig endoplasmic reticulum reticwlwm endoplasmig endoplasmic reticulums reticwlwm endoplasmig endorse arnodi (=write on the back of a cheque etc) endorse cadarnhau (=confirm) endorse cefnogi (=support) endorsed arnodedig endorsement arnodiad (=writing on back of cheque etc) endorsement cadarnhad (=confirmation) endorsement cefnogaeth (=support) endorsements arnodiad (=writing on back of cheque etc) endorsements cadarnhad (=confirmation) endorsements cefnogaeth (=support) endoscope endosgop endoscopes endosgop endoskeleton sgerbwd mewnol endoskeletons sgerbwd mewnol endosperm endosberm endosperms endosberm endothelium endotheliwm endotheliums endotheliwm endothermic endothermig endow gwaddoli endowed gwaddoledig endowed school ysgol waddoledig endowed schools ysgol waddoledig endowment gwaddol endowment assurance aswiriant gwaddol endowment assurances aswiriant gwaddol endowment mortgage morgais gwaddol endowment mortgages morgais gwaddol endowment policy polisi gwaddol endowments gwaddol endrumpf lledwastad terfynol endrumpfs lledwastad terfynol endurance dygnwch endurances dygnwch enema enema enemas enema enemy gelyn enemy action ymgyrch y gelyn enemy actions ymgyrch y gelyn enemy lines llinellau'r gelyn energetic egnïol energetic activity gweithgaredd egnïol energetics egnïeg energize egnioli energized egnioledig energy egni energy balance cydbwysedd egni energy balances cydbwysedd egni energy barrier rhwystr egni energy barriers rhwystr egni energy content cynnwys egni energy contents cynnwys egni energy demands gofynion egni energy efficiency effeithlonrwydd egni energy expenditure traul egni energy expenditures traul egni energy flow llif egni energy flows llif egni energy harnessing harnesu egni energy issues materion egni energy level lefel egni energy levels lefel egni energy source ffynhonnell egni energy sources ffynhonnell egni energy system system egni energy systems system egni energy transfer trosglwyddo egni energy value gwerth egni energy value of food cyfwerth egni bwyd energy values gwerth egni energy yield cynnyrch egni energy yields cynnyrch egni energy-rich bond bond egnioledig energy-rich bonds bond egnioledig enfeoff enffeodu enfold ymblygu enfolds ymblygu enfranchise rhyddfreinio engage cyweddu (the blade) engage with gweithio'n agos gyda engaged column colofn gyswllt engaged columns colofn gyswllt engagement cyrch milwrol (in war) engagement cyweddiad (in fencing) engagement ymrwymiad (commitment) engagements cyrch milwrol (in war) engagements cyweddiad (in fencing) engagements ymrwymiad (commitment) engine injan (of steam train) engine peiriant (in general) engine cylinder silindr peiriant engine cylinders silindr peiriant engine friction ffrithiant peiriant engine frictions ffrithiant peiriant engine house peiriandy (technical usage) engine house tŷ injan (historically, in quarries etc) engine houses peiriandy (technical usage) engine houses tŷ injan (historically, in quarries etc) engineer peiriannydd engineer's hammer morthwyl peiriannydd engineer's hammers morthwyl peiriannydd engineer's marking blue hylif marcio glas engineer's marking blues hylif marcio glas engineer's square sgwâr peiriannydd engineer's squares sgwâr peiriannydd engineer's vice feis peiriannydd engineer's vices feis peiriannydd engineering peirianneg engineering activities gweithgareddau peirianyddol engineering brick bricsen beirianneg engineering bricks bricsen beirianneg engineering drawing lluniad peirianegol (of produce) engineering drawing lluniadu peirianegol (of activity) engineering drawings lluniad peirianegol (of produce) engineering function swyddogaeth peirianneg engineering functions swyddogaeth peirianneg engineering industry diwydiant peirianneg engineering system system beirianegol engineering systems system beirianegol engineerings peirianneg engineers peiriannydd engines injan (of steam train) engines peiriant (in general) englacial mewnrewlifol englacial moraine marian perfedd englacial moraines marian perfedd englishry saesonaeth engrain engreinio engrave ysgythru engraved glassware llestri gwydr ysgythredig engraving ysgythriad engraving block bloc ysgythru engraving blocks bloc ysgythru engraving line llin-ysgythriad engraving lines llin-ysgythriad engraving tool erfyn ysgythru engraving tools erfyn ysgythru engravings ysgythriad engross brasgopïo (=produce a fair copy) engross braslythrennu (=reproduce in larger letters) engrossment brasgopi (=fair copy) engrossment braslythreniad (=large writing) engrossments brasgopi (=fair copy) engrossments braslythreniad (=large writing) engulf amlyncu (amoeba etc) enhance gwella enhanced gwell enharmonic enharmonig enharmonic change newid enharmonig enharmonic changes newid enharmonig enharmonic interval cyfwng enharmonig enharmonic intervals cyfwng enharmonig enharmonic note nodyn enharmonig enharmonic notes nodyn enharmonig enigma enigma enigmas enigma enjoy mwynhau enjoyment mwynhad enjoyments mwynhad enlarge helaethu enlarge a pattern helaethu patrwm enlarged image delwedd fwy enlarged images delwedd fwy enlargement helaethiad enlargement and reduction helaethu a lleihau enlargements helaethiad enlightened goleuedig enlightened absolutism absoliwtiaeth oleuedig enlightened absolutisms absoliwtiaeth oleuedig enlist ymrestru enquiry ymholiad enquiry frame ffrâm holi enquiry frames ffrâm holi enquiry question cwestiwn ymholi enquiry questions cwestiwn ymholi enrichment cyfoethogi enrol cofrestru enrolled nurse nyrs restredig enrolled nurses nyrs restredig enrolment cofrestriad enrolments cofrestriad ensemble ensemble ensembles ensemble ensign lluman (=flag) ensign llumanwr (of person) ensigns lluman (=flag) ensigns llumanwr (of person) ensure sicrhau entail entael entail enteilio entail fee ffi entael entail fees ffi entael entails entael entemophilous entemoffilaidd entente entente ententes entente enter cofrestru (for an exam) enter mynd i mewn (=go in) enter treiddio (=penetrate) enteral tube feeding bwydo gyda thiwb enteritis enteritis enterokinase enterocinas enterokinases enterocinas enterprise menter enterprise zone ardal fenter enterprise zones ardal fenter enterprises menter entertainment adloniant entertainments adloniant enthalpy enthalpi enthalpy change newid enthalpi enthalpy change of atomization newid enthalpi atomeiddiad enthalpy change of combustion newid enthalpi hylosgiad enthalpy change of formation newid enthalpi ffurfiant enthalpy change of hydration newid enthalpi hydradiad enthalpy change of neutralization newid enthalpi niwtraliad enthalpy change of solution newid enthalpi toddiant enthalpy change of sublimation newid enthalpi sychdarthiad enthalpy changes newid enthalpi enthalpy changes of formation newidiadau enthalpi ffurfiant enthalpy of vaporization enthalpi anweddiad entire cyfan entirety cyfanrwydd entitlement hawl entitlements hawl entity endid entity FAULT endid DIFFYG entity-relationship diagram diagram perthynas endidau entity-relationship diagrams diagram perthynas endidau entomology entomoleg entr'acte entr'acte entr'actes entr'acte entrance agoriad (=opening) entrance mynedfa (=way in) entrances agoriad (=opening) entrances mynedfa (=way in) entrenched meander ystum culrych entrenched meanders ystum culrych entrepreneur entrepreneur entrepreneurs entrepreneur entropy entropi entry caniad (in composition) entry cofnod (=record) entry cydiad (in ensemble) entry datganiad (in fugue) entry mynedfa (=doorway) entry mynediad (=act or instance of going in) entry point man cyflwyno (in discussion etc) entry points man cyflwyno (in discussion etc) entrée dish llestr entrée (of container) entrée dish saig entrée (of food) entrée dishs llestr entrée (of container) entrée dishs saig entrée (of food) enumerable rhifadwy enumerate rhifo enumeration rhifiad enumerations rhifiad enuresis enwresis envelope amlen envelope of straight lines amlen llinellau syth envelopes amlen environment amgylchedd environment committee pwyllgor amgylchedd environment committees pwyllgor amgylchedd environmental amgylcheddol environmental challenge her yr amgylchedd environmental challenges her yr amgylchedd environmental conservation and protection gwarchod ac amddiffyn yr amgylchedd environmental education addysg amgylcheddol environmental educations addysg amgylcheddol environmental factor ffactor amgylcheddol environmental factors ffactor amgylcheddol environmental hazard perygl amgylchedd environmental hazards perygl amgylchedd environmental health iechyd yr amgylchedd environmental healths iechyd yr amgylchedd environmental impact effaith amgylcheddol environmental impacts effaith amgylcheddol environmental pollution llygredd amgylcheddol environmental pollutions llygredd amgylcheddol environmental protection amddiffyn yr amgylchedd environmental studies astudiaethau'r amgylchedd environments amgylchedd envoy cennad enzyme ensym enzyme activator actifadydd ensym enzyme activators actifadydd ensym enzyme activity actifedd ensymig enzyme detergent glanedydd ensym enzyme detergents glanedydd ensym enzyme inhibition ataliad ensym enzyme inhibitions ataliad ensym enzyme prosthetic group grŵp prosthetig ensym enzyme prosthetic groups grŵp prosthetig ensym enzyme specificity penodolrwydd ensym enzymes ensym eosinophil eosinoffil eosinophils eosinoffil epaulette epaulette epaulettes epaulette epeiric sea môr epeirig epeiric seas môr epeirig epeirogenetic epeirogenetig ephemera effemera ephemeras effemera ephermeris effermeris epic arwrgerdd epic arwrol epicentre uwchganolbwynt epicentres uwchganolbwynt epicotyl epicotyl epicotyls epicotyl epics arwrgerdd epicyclic episeiclig epicycloid episeicloid epicycloids episeicloid epidemic epidemig epidemics epidemig epidemiological data data epidemiolegol epidermal epidermaidd epidural epidwral epidural analgesic poenleddfwr epidwral epidural analgesics poenleddfwr epidwral epigeal epigeal epiglottis epiglotis epigynous epigynol epilepsy epilepsi epileptic epileptig epileptic child plentyn epileptig epileptic childs plentyn epileptig epimerism epimeredd epimerisms epimeredd epimerization epimeru epimorphic epimorffig epipetalous epipetalog epiphysis epiffysis epiphyte epiffyt epiphytes epiffyt epiphytic epiffytig episcopacy esgobaeth episcopal esgobol episcopalian esgobaethol episcopalian esgobwr episcopalianism esgobwriaeth episcopalianisms esgobwriaeth episcopalians esgobwr episcopate esgobaeth episcopates esgobaeth episiotomy episiotomi episode atgan (in music) episode pennod (in book) episodes atgan (in music) episodes pennod (in book) episodical atganol epistle epistol epistles epistol epitaph beddargraff epitaphs beddargraff epithelial epithelaidd epithelium epitheliwm epitheliums epitheliwm epitrochoid epitrocoid epitrochoids epitrocoid epoch cyfnod epoches cyfnod epoxy epocsi epoxy resin resin epocsi epoxy resin glue glud resin epocsi epoxy resin glues glud resin epocsi epoxy resins resin epocsi epée epée epées epée equable cymedrol (of climate) equable cyson (=not varying) equal cyfartal (in general) equal hafal (in mathematics) equal unfaint (magnitude) equal addition method dull adio cyfartal equal addition methods dull adio cyfartal equal and opposite hafal a dirgroes equal area arwynebedd cyfartal equal areas arwynebedd cyfartal equal constituencies etholaethau cyfartal equal divisions rhannau unfaint equal opportunities policy polisi cyfle cyfartal equal opportunity cyfle cyfartal equal partition dosrannu cyfartal equal pay cyflog cydradd equal rights hawliau cyfartal equal sign hafalnod ( = ) equal signs hafalnod ( = ) equal stretching ymestyn cyfartal equal temperament ardymer cyfartal equal temperaments ardymer cyfartal equality cydraddoldeb (in general) equality hafaledd (mathematical) equalize cyfartalu (in general) equalize hafalu (in mathematics) equally likely yr un mor debygol equally likely principle egwyddor tebygolrwydd hafal equally likely principles egwyddor tebygolrwydd hafal equally spaced cytbell equate hafalu equation hafaliad equations hafaliad equator cyhydedd equatorial cyhydeddol equatorial projection tafluniad cyhydeddol equatorial projections tafluniad cyhydeddol equators cyhydedd equi-area projection tafluniad arwynebedd hafal equi-area projections tafluniad arwynebedd hafal equi-partition hafal-ymraniad equi-partitions hafal-ymraniad equiangular hafalonglog equidistant cytbell equidistant projection tafluniad cytbell equidistant projections tafluniad cytbell equilateral hafalochrog equilateral arch bwa hafalochrog equilateral arches bwa hafalochrog equilateral triangle triongl hafalochrog equilateral triangles triongl hafalochrog equilaterals hafalochrog equilibrate ecwilibreiddio equilibrium ecwilibriwm equilibrium concentration crynodiad ecwilibriwm equilibrium concentrations crynodiad ecwilibriwm equilibrium constant cysonyn ecwilibriwm equilibrium constants cysonyn ecwilibriwm equilibrium expression mynegiad ecwilibriwm equilibrium expressions mynegiad ecwilibriwm equilibrium position safle ecwilibriwm equilibrium positions safle ecwilibriwm equilibrium potential potensial ecwilibriwm equilibrium potentials potensial ecwilibriwm equilibrium price pris ecwilibriwm equilibrium prices pris ecwilibriwm equilibrium unemployment diweithdra ecwilibriwm equilibrium unemployments diweithdra ecwilibriwm equilibriums ecwilibriwm equinox cyhydnos equinoxes cyhydnos equipluve glawlin cymarebol equipluves glawlin cymarebol equipment cyfarpar (in general) equipment offer (for kitchen, camping) equipments cyfarpar (in general) equipotential unbotensial equispaced â lle gwag cyfartal equitable redemption adbryniad ecwitïol equitable redemptions adbryniad ecwitïol equity ecwiti (jurisdiction) equivalence cywerthedd equivalence relation perthynas cywerthedd equivalence relations perthynas cywerthedd equivalences cywerthedd equivalent cywerth equivalent cywerthydd equivalent area arwynebedd cywerth equivalent areas arwynebedd cywerth equivalent circuit cylched gywerth equivalent circuits cylched gywerth equivalent fractions ffracsiynau cywerth equivalent lens lens cywerth equivalent sets setiau cywerth equivalent systems systemau cywerth equivalent weight pwysau cywerth equivalents cywerthydd era oes erase dileu eraser dilëwr erasers dilëwr erasure dilead erasures dilead erbium erbiwm (Er) erbiums erbiwm (Er) erect codi erect unionsyth erect image delwedd unionsyth erect images delwedd unionsyth erectile tissue meinwe sythu erectile tissues meinwe sythu erection codiad (in physiology) erections codiad (in physiology) erector muscle cyhyryn sythu erector muscles cyhyryn sythu eremite ermid eremites ermid eremitical meudwyaidd ergodic ergodig ergonomic aids cymhorthion ergonomig ergonomics ergonomeg ergot mallryg ergots mallryg ermine carlwm ermines carlwm erode erydu eroded surface arwyneb erydog eroded surfaces arwyneb erydog erosion erydiad erosion platform llwyfan erydu erosion platforms llwyfan erydu erosion surface arwyneb erydiad erosion surfaces arwyneb erydiad erosions erydiad erosive erydol erosive agent erydydd erosive agents erydydd error cyfeiliornad (=amount of inaccuracy) error gwall (=mistake) error character gwallnod error characters gwallnod error checking code cod archwilio gwallau error checking codes cod archwilio gwallau error code cod gwallau error codes cod gwallau error correcting code cod cywiro gwallau error correcting codes cod cywiro gwallau error detecting code cod darganfod gwallau error detecting codes cod darganfod gwallau error diagnostics diagnosteg gwallau error handling trin gwallau error interrupt ymyriad gwall error interrupts ymyriad gwall error message neges gwall error messages neges gwall error range amrediad gwallau error ranges amrediad gwallau error routine rheolwaith gwallau error routines rheolwaith gwallau error trap magl gwallau error trapping maglu gwallau error traps magl gwallau errors cyfeiliornad (=amount of inaccuracy) errors gwall (=mistake) erupt echdorri eruption echdoriad eruptions echdoriad eruv eruv eruvs eruv erythrocyte corffilyn coch y gwaed (=corpuscle) erythrocytes corffilyn coch y gwaed (=corpuscle) escalate codi (of prices) escalate dwysáu (of conflict) escalope escalope escalopes escalope escape velocity cyflymder dianc escapement cilfa (plane) escapements cilfa (plane) escarpment sgarp escarpments sgarp eschatological myth myth eschatolegol eschatological myths myth eschatolegol eschatology eschatoleg escheat siedu escheat siêd escheator siedwr escheators siedwr escheats siêd escribed circle allgylch escribed circles allgylch escutcheon esgytsiwn escutcheon pin pìn esgytsiwn escutcheon pins pìn esgytsiwn escutcheon plate plât esgytsiwn escutcheon plates plât esgytsiwn escutcheons esgytsiwn esker esgair eskers esgair esparto esparto espionage ysbïo esquire yswain esquires yswain essay traethawd essence rhinflas essences rhinflas essential hanfodol essential boundary conditions amodau ffin hanfodol essential dimensions dimensiynau hanfodol essential note nodyn anhepgor essential notes nodyn anhepgor essential traffic trafnidiaeth hanfodol essential traffics trafnidiaeth hanfodol essentials hanfodion establish sefydlu established conservation area ardal gadwraeth sefydledig established conservation areas ardal gadwraeth sefydledig established routine trefn sefydledig established routines trefn sefydledig establishing shot llun lleoli establishing shots llun lleoli establishment sefydliad establishments sefydliad estate stad estate agent gwerthwr eiddo estate agent details manylion y gwerthwr eiddo estate agents gwerthwr eiddo estate duty treth stad estate ownership perchenogaeth stad estate ownerships perchenogaeth stad estates stad estates of the realm stadau'r deyrnas ester ester esterification esteriad esterifications esteriad esterify esteru esters ester estimate amcangyfrif estimated perspective persbectif amcangyfrifol estimated perspectives persbectif amcangyfrifol estimated uncertainty ansicrwydd amcangyfrifol estimates amcangyfrif estimation amcangyfrif (=rough calculation) estimation barn (=opinion) estimation of error amcangyfrif cyfeiliornad estimations amcangyfrif (=rough calculation) estimations barn (=opinion) estimator amcangyfrifyn estimators amcangyfrifyn estreat ystrêd estreats ystrêd estuary moryd etch ysgythru etch plain gwastadedd ysgythru etch plains gwastadedd ysgythru etched glassware llestri gwydr ysgythrog etcher ysgythrwr etchers ysgythrwr etching ysgythriad etching ground grwnd ysgythru etching grounds grwnd ysgythru etching needle nodwydd ysgythru etching needles nodwydd ysgythru etching press gwasg ysgythru etchings ysgythriad ethane ethan ethanes ethan ethanoic ethanöig ethanol ethanol ethanolic sodium hydroxide sodiwm hydrocsid ethanolig ethanolic sodium hydroxides sodiwm hydrocsid ethanolig ethanolic solution of iodomethane hydoddiant iodomethan ethanolig ethene ethen ethenes ethen ether ether ethers ether etheryser etherydd etherysers etherydd ethical moesegol ethical issue mater moesegol ethical issues mater moesegol ethical monotheism undduwiaeth foesegol ethical monotheisms undduwiaeth foesegol ethical teaching addysgu am foeseg ethical theory damcaniaeth foesegol ethics moeseg ethnic ethnig ethnic minority group grŵp lleiafrifol ethnig ethnic minority groups grŵp lleiafrifol ethnig ethnic origin tarddiad ethnig ethnic origins tarddiad ethnig ethnicity ethnigedd ethnographic area ardal ethnograffig ethnographic areas ardal ethnograffig ethnological legend chwedl ethnolegol ethnological legends chwedl ethnolegol ethnology ethnoleg ethnomusicology ethnogerddoleg ethos ethos ethyl alcohol ethyl alcohol ethyl alcohols ethyl alcohol ethyl benzenecarboxylate ethyl bensencarbocsylad ethyl benzenecarboxylates ethyl bensencarbocsylad ethyl benzoate ethyl bensoad ethyl benzoates ethyl bensoad ethyne ethyn ethynes ethyn etiolate ymheglu etiolated heglog etiolation hegledd etiolations hegledd eukaryote ewcaryot eukaryotes ewcaryot eukaryotic ewcaryotig euphonious persain euphony perseinedd euro ewro europium ewropiwm (Eu) europiums ewropiwm (Eu) eustatic ewstatig eutectic mixture cymysgedd ewtectig eutectic mixtures cymysgedd ewtectig eutectic point pwynt ewtectig eutectic points pwynt ewtectig eutectics ewtecteg euthanasia ewthanasia euthanasias ewthanasia eutherian ewtheraidd eutrophic ewtroffig eutrophication ewtroffigedd eutrophications ewtroffigedd evacuate gwagio evacuation ymgiliad evacuation procedures trefn ymgilio evacuations ymgiliad evacuee faciwî evacuees faciwî evaded cadence diweddeb annisgwyl evaded cadences diweddeb annisgwyl evagination allweiniad evaginations allweiniad evaluate cloriannu (in general) evaluate enrhifo (in mathematics) evaluate gwerthuso (in appraisal process) evaluate evidence gwerthuso tystiolaeth evaluate expressions enrhifo mynegiadau evaluation enrhifiad (in mathematics) evaluation gwerthusiad (in appraisal process) evaluation criterion maen prawf gwerthuso evaluation criterions maen prawf gwerthuso evaluations enrhifiad (in mathematics) evaluations gwerthusiad (in appraisal process) evangelical efengylaidd evangelist efengylwr evangelists efengylwr evaporate anweddu evaporating basin dysgl anweddu evaporating basins dysgl anweddu evaporation anweddiad evaporations anweddiad evapotranspiration anwedd-drydarthiad evapotranspirations anwedd-drydarthiad even llyfn even chance siawns deg even chances siawns deg even crestline briglin cyson even crestlines briglin cyson even down llyfnhau even function eil-ffwythiant even functions eil-ffwythiant even grain graen llyfn even grains graen llyfn even number eilrif even numbers eilrif even parity eilbaredd even parity check gwiriad eilbaredd even parity checks gwiriad eilbaredd even pitch pitsh llyfn even pitches pitsh llyfn even plaid plad cyson even plaids plad cyson even pressure gwasgedd llyfn even pressures gwasgedd llyfn even texture gwead llyfn even textures gwead llyfn even weave gwehyddiad llyfn even weaves gwehyddiad llyfn evening class dosbarth nos evening dress ffrog fin nos evening meal pryd o fwyd gyda'r hwyr evening meals pryd o fwyd gyda'r hwyr evens siawns deg evensong gosber evensongs gosber event cystadleuaeth (=competition) event digwyddiad (=happening) event handling trin digwyddiadau events cystadleuaeth (=competition) events digwyddiad (=happening) everglaze sglein parhaol (finish) everglazes sglein parhaol (finish) evergreen bythwyrdd evergreen coeden fythwyrdd evergreens coeden fythwyrdd eversion echdroad eversions echdroad evict troi allan evidence tystiolaeth evidences tystiolaeth evidential tystoliaethol evil drygioni evil and suffering drygioni a dioddefaint evils drygioni evolute efoliwt evolutes efoliwt evolution esblygiad evolutionary esblygiadol evolutions esblygiad evolve cynhyrchu (of gases) evolve datblygu (=develop) evolve esblygu (in biology) evolve a design datblygu cynllun evolved gases nwyon cynyrchiedig exacerbation gwaethygiad exacerbations gwaethygiad exact union exact length hyd cywir exact lengths hyd cywir exact money arian cywir exact sampling distribution dosraniad samplu union exact sampling distributions dosraniad samplu union exact size maint cywir exact sizes maint cywir exactly yn union exactness manwl gywirdeb exaggerate gorliwio exaggeration gorliwiad exaggerations gorliwiad examination archwiliad (of patient etc) examination arholiad (formal test) examination component cydran arholiad examination components cydran arholiad examination paper papur arholiad examination papers papur arholiad examination under anaesthetic archwiliad dan anaesthetig examination under anaesthetics archwiliad dan anaesthetig examinations archwiliad (of patient etc) examinations arholiad (formal test) examinations board bwrdd arholi examinations boards bwrdd arholi examine archwilio (=look closely at) examine arholi (=test in an examination) examining magistrate ynad archwiliol examining magistrates ynad archwiliol example enghraifft examples enghraifft excavate cloddio excavation cloddiad excavations cloddiad exceed bod yn fwy na excentric allganol (in biology) except eithrio exception eithriad exceptional child plentyn eithriadol exceptional childs plentyn eithriadol exceptions eithriad excess gormodedd excess demand goralw excess demands goralw excess energy gormodedd egni excess pressure gormodedd gwasgedd excess pressures gormodedd gwasgedd excessive gormodol excessive end play llacrwydd gormodol ar y pen excessive slackness llacrwydd gormodol exchange cyfnewid exchange cyfnewidfa exchange rate cyfradd gyfnewid exchange rates cyfradd gyfnewid exchange reaction adwaith cyfnewid exchange reactions adwaith cyfnewid exchange scheme cynllun cyfnewid exchange schemes cynllun cyfnewid exchangeable cyfnewidiadwy exchangeable disk disg cyfnewidiadwy exchangeable disk store storfa ddisg gyfnewidiadwy (EDS) exchangeable disk stores storfa ddisg gyfnewidiadwy (EDS) exchangeable disks disg cyfnewidiadwy exchanges cyfnewidfa exchequer trysorlys exchequers trysorlys excircle allgylch excircles allgylch excise ecseis exciseman ecseismon excisemans ecseismon excises ecseis excision toriad excisions toriad excitable cyffroadwy excitation cyffroad excitation waves tonnau cyffroad excitations cyffroad excitatory centre canolfannyn cyffroadol excitatory centres canolfannyn cyffroadol excitatory post-synaptic potential potensial ôl-synaptig cyffroadol (EPSP) excitatory post-synaptic potentials potensial ôl-synaptig cyffroadol (EPSP) excite cynhyrfu excited state cyflwr cynhyrfol excited states cyflwr cynhyrfol excitement cynnwrf excitements cynnwrf exciting cynhyrfus exclamation mark ebychnod exclamation marks ebychnod exclave allglofan exclaves allglofan exclosure gwaharddle exclosures gwaharddle exclude cau allan (=shut out) exclude gwahardd (=prohibit) excluded child plentyn wedi'i wahardd excluded childs plentyn wedi'i wahardd exclusion clause cymal eithrio exclusion clauses cymal eithrio exclusion principle egwyddor wahardd exclusion principles egwyddor wahardd exclusive anghynhwysol exclusive OR NEU anghynhwysol excommunicant ysgymunwr excommunicants ysgymunwr excommunicate ysgymuno excommunication ysgymuniad excommunications ysgymuniad excrete ysgarthu excretion ysgarthiad excretions ysgarthiad excretory ysgarthle excretory ysgarthol excretory cavity ceudod ysgarthiol excretory organ organ ysgarthu excretory organs organ ysgarthu excretory substance sylwedd ysgarthiol excretory substances sylwedd ysgarthiol executable gweithredadwy execute cyflawni (=carry into effect) execute dienyddio (=kill) execute gweithredu (=act) execute cycle cylchred weithredu execute cycles cylchred weithredu execute phase gwedd weithredu execute phases gwedd weithredu execution time amser gweithredu execution times amser gweithredu executive adran weithredol (department) executive gweithredol executive gweithredwr executive swyddog gweithredol (officer) executive body corff gweithredol executive committee pwyllgor gwaith (in general) executive committees pwyllgor gwaith (in general) executive program rhaglen oruchwylio executive programs rhaglen oruchwylio executives adran weithredol (department) executives gweithredwr executives swyddog gweithredol (officer) executor ysgutor executors ysgutor exemplar enghraifft batrymol exemplars enghraifft batrymol exempt wedi'i esgusodi (with masculine nouns) exempt wedi'i hesgusodi (with feminine nouns) exemption esgusodiad (in general) exemption rhyddhad (from income tax) exemption clause cymal eithrio exemption clauses cymal eithrio exemptions esgusodiad (in general) exemptions rhyddhad (from income tax) exercise ymarfer exercise activity gweithgaredd ymarfer corff (physical activity) exercise adherence ymlyniad at ymarfer corff (physical activity) exercise adherences ymlyniad at ymarfer corff (physical activity) exercise plan cynllun ymarfer corff (physical activity) exercise plans cynllun ymarfer corff (physical activity) exercise programme rhaglen ymarfer corff (physical activity) exercise programmes rhaglen ymarfer corff (physical activity) exercises ymarfer exergonic ecsergonig exert a force rhoi grym exhalant siphon siffon allanadlu exhalant siphons siffon allanadlu exhale allanadlu exhaled gases nwyon allanadledig exhaust disbyddu (=use up) exhaust gwacáu (evacuate) exhaust air aer gwacáu exhaust airs aer gwacáu exhaust gas nwy gwacáu exhaust manifold maniffold gwacáu exhaust manifolds maniffold gwacáu exhaust pipe pibell wacáu exhaust pipes pibell wacáu exhaust port porth gwacáu exhaust ports porth gwacáu exhaust pump pwmp gwacáu exhaust pumps pwmp gwacáu exhausted disbyddedig (of seams of coal) exhaustible disbyddadwy exhaustion gorludded exhaustions gorludded exhibit arddangos exhibition arddangosfa (display of art etc) exhibition arddangosiad (act of) exhibitions arddangosfa (display of art etc) exhibitions arddangosiad (act of) exhibitor arddangoswr exhibitors arddangoswr exhorter cymhellwr exhorters cymhellwr exhumed datgladdedig (of landform) exile alltud (in general) exile alltudio exiles alltud (in general) existence bodolaeth existence of God bodolaeth Duw existence theorem theorem bodolaeth existence theorems theorem bodolaeth existences bodolaeth existing use defnydd presennol existing uses defnydd presennol exit allanfa (=way out) exits allanfa (=way out) exocrine ecsocrin exocrine gland chwarren ecsocrin exocrine glands chwarren ecsocrin exocrines ecsocrin exogenesis alldarddiad exogenic alldarddol exogenous alldarddol exorcise bwrw allan exoskeleton sgerbwd allanol exoskeletons sgerbwd allanol exothermic ecsothermig exothermic heat gwres ecsothermig exothermic heats gwres ecsothermig exotic alldardd (of river) exotic egsotig (of plants) exotics alldardd (of river) expand ehangu expand ymledu expanded ehangedig expanded metal metel ehangedig expanded metals metel ehangedig expanding industry diwydiant ehangol expanding reamer agorell gymwysadwy expanding reamers agorell gymwysadwy expansion ehangiad expansion allowance lwfans ehangu expansion allowances lwfans ehangu expansion bolt bollt ymestyn expansion bolts bollt ymestyn expansion cloud chamber llestr niwl ehangiad expansion cloud chambers llestr niwl ehangiad expansion slot agen ehangu expansion slots agen ehangu expansions ehangiad expansive bit ebill ymledu expansive bits ebill ymledu expansivity eangolrwydd expectant mother mam feichiog expectant mothers mam feichiog expected disgwyliedig (of value) expected value gwerth disgwyliedig expected values gwerth disgwyliedig expectorant poergarthydd expectorants poergarthydd expediency buddioldeb expedition alldaith (outdoor pursuit) expedition ymgyrch (military) expeditions alldaith (outdoor pursuit) expeditions ymgyrch (military) expel alltudio (from country) expel diarddel (from institution, movement) expenditure gwariant expenditure retained gwariant a gedwir yn ôl expenditure retaineds gwariant a gedwir yn ôl expenditures gwariant expense traul expenses traul experience profiad experience of nirvana profiad o nirfana experiences profiad experiential learning dysgu drwy brofiadau experiment arbrawf experiment arbrofi experimental arbrofol experimental data data arbrofion experimental error cyfeiliornad mewn arbrawf experimental errors cyfeiliornad mewn arbrawf experimental evidence tystiolaeth arbrofol experimental evidences tystiolaeth arbrofol experimental film ffilm arbrofol experimental films ffilm arbrofol experimental method dull arbrofol experimental methods dull arbrofol experimental procedure dull o weithredu arbrawf experimental procedures dull o weithredu arbrawf experimental technique techneg arbrofi experimental techniques techneg arbrofi experimental work gwaith arbrofi experimental works gwaith arbrofi experiments arbrawf expert system system arbenigo expert systems system arbenigo expertise arbenigedd expertises arbenigedd expiration allanadliad (=breathing out) expirations allanadliad (=breathing out) expire allanadlu (=breath out) explain egluro explanation esboniad explanations esboniad explanatory diagram diagram eglurhaol explanatory diagrams diagram eglurhaol explicit echblyg (in mathematics) explicit penodol (in computing) explicit function ffwythiant echblyg (in mathematics) explicit functions ffwythiant echblyg (in mathematics) explode ffrwydro exploded taenedig (of drawing etc) exploded drawing lluniad taenedig exploded drawings lluniad taenedig exploded isometric isometrig taenedig exploded isometric view golwg isometrig taenedig exploded isometric views golwg isometrig taenedig exploded isometrics isometrig taenedig exploded sketch braslun taenedig exploded sketches braslun taenedig exploded view golwg taenedig exploded views golwg taenedig exploit datblygu (=develop) exploit ecsbloetio (=use unfairly) exploitation ecsbloetiaeth exploitation of resources datblygu adnoddau exploitations ecsbloetiaeth exploration archwiliad (of ideas) exploration fforiad (of land) exploration method dull archwilio exploration methods dull archwilio explorations archwiliad (of ideas) explorations fforiad (of land) exploratory archwiliadol exploratory behaviour gweithgaredd chwilio exploratory behaviours gweithgaredd chwilio exploratory play chwarae archwiliadol explore archwilio (ideas) explore fforio (land) explorer fforiwr explorers fforiwr explosion ffrwydrad explosions ffrwydrad explosive ffrwydrol explosive ffrwydryn explosives ffrwydryn exponent esbonydd (in mathematics) exponential esbonyddol exponential definition diffiniad esbonyddol exponential definitions diffiniad esbonyddol exponential functions ffwythiannau esbonyddol exponential phase gwedd esbonyddol exponential phases gwedd esbonyddol exponents esbonydd (in mathematics) export allforio export allforyn export duty toll allforio exporter allforiwr exporters allforiwr exports allforyn expose datgelu (facts etc) expose dinoethi (in photography) expose to light rhoi yn y golau exposed agored (to the weather) exposed noeth (in music) exposed eighth wythfed noeth exposed eighths wythfed noeth exposed fifth pumed noeth exposed fifths pumed noeth exposed octave wythfed noeth exposed octaves wythfed noeth exposition dangosiad expositions dangosiad exposure datguddiad (to air, light etc) exposure dinoethiad (in photography) exposure oerfel (=being exposed to the elements) exposures datguddiad (to air, light etc) exposures dinoethiad (in photography) exposures oerfel (=being exposed to the elements) express mynegi expression mynegiad (in mathematics, act of expressing) expression mynegiant (of ideas etc) expression ymadrodd (=phrase) expression mark marc mynegiant expression marks marc mynegiant expressionism mynegiadaeth expressionisms mynegiadaeth expressionist mynegiadol expressionist mynegiadwr expressionists mynegiadwr expressions mynegiad (in mathematics, act of expressing) expressions mynegiant (of ideas etc) expressions ymadrodd (=phrase) expressive llawn mynegiant expressive arts celfyddydau mynegiannol expressive language disorder diffyg mynegiant llafar expressive language disorders diffyg mynegiant llafar expressive movement symudiad mynegiannol expressive movements symudiad mynegiannol expressiveness mynegolrwydd expressway ffordd gyflym expropriate difeddiannu expulsion alltudiad (from country) expulsion diarddeliad (from movement) expulsion ymwthiad (in childbirth) expulsions alltudiad (from country) expulsions diarddeliad (from movement) expulsions ymwthiad (in childbirth) extempore byrfyfyr extemporization datganiad ar y pryd (performance) extemporization passage darn byrfyfyr extemporization passages darn byrfyfyr extemporizations datganiad ar y pryd (performance) extemporize datganu ar y pryd (in singing) extend estyn extend ymestyn extended day diwrnod estynedig extended family teulu estynedig extended language iaith estynedig extended languages iaith estynedig extended line llinell estynedig extended lines llinell estynedig extended modulator cyweiriadur mawr extended modulators cyweiriadur mawr extended prose rhyddiaith estynedig extended proses rhyddiaith estynedig extended reading darllen estynedig extended readings darllen estynedig extender estynnydd extenders estynnydd extensible estynadwy extension estyniad extension ymestyniad (of muscles) extension activity gweithgaredd estyn extension booklet llyfryn ymestyn extension booklets llyfryn ymestyn extension hinge colfach estyn extension hinges colfach estyn extension organ organ estyn extension organs organ estyn extension paper papur estynedig extension papers papur estynedig extension study astudiaeth estyn extensions estyniad extensions ymestyniad (of muscles) extensive eang extensive listening gwrando eang extensive reading darllen eang extensor muscle cyhyryn estyn extensor muscles cyhyryn estyn extent maint (=size) extent stent (land) extent of reaction lledaeniad yr adwaith (in chemistry) extents maint (=size) extents stent (land) exterior allanol exterior tu allan exterior angle ongl allanol exterior angles ongl allanol exterior plywood pren haenog allanol exterior plywoods pren haenog allanol exteriors tu allan exterminate difodi extermination camp gwersyll difodi extermination camps gwersyll difodi external allanol external assessment asesu allanol external assessor aseswr allanol external assessors aseswr allanol external benefit budd allanol external benefits budd allanol external bisector hanerydd allanol external bisectors hanerydd allanol external chest compression cywasgiad allanol ar y frest external chest compressions cywasgiad allanol ar y frest external circlip cylchglip allanol external circlips cylchglip allanol external communication cyfathrebu allanol external cost cost allanol external costs cost allanol external degree gradd allanol external degrees gradd allanol external examiner arholwr allanol external examiners arholwr allanol external growth twf allanol external growths twf allanol external memory cof allanol external part rhan allanol external parts rhan allanol external point pwynt allanol external points pwynt allanol external pressure gwasgedd allanol external pressures gwasgedd allanol external recruitment recriwtio allanol external respiration resbiradaeth allanol external respirations resbiradaeth allanol external validator dilysydd allanol external validators dilysydd allanol extinct diflanedig extinct volcano llosgfynydd marw extinguisher stake bonyn hirbig extinguisher stakes bonyn hirbig extort cribddeilio extorter cribddeiliwr extorters cribddeiliwr extortion cribddeiliaeth extortionate gormodol extortions cribddeiliaeth extra contractual referral achos all-gontract (ECR) extra contractual referrals achos all-gontract (ECR) extra fine mân iawn extra galactic echalaethog extra high tension tensiwn arbennig o uchel (e.h.t.) extra high tensions tensiwn arbennig o uchel (e.h.t.) extra-curricular activity gweithgaredd allgyrsiol extra-embryonic allembryonig extra-evidential alldystiolaethol extra-musical stimulus ysgogiad allgerddorol extra-nuclear allniwclear extracellular allgellog extract detholiad (=part of something) extract echdynnu extract echdynnyn (=something extracted) extract rhanfap (of map) extract rhin (of meat) extract a resource echdynnu adnodd extract water echdynnu dŵr extraction echdyniad extraction rate of flour cyfradd echdynnol blawd extractions echdyniad extractive echdynnol extractive industry diwydiant echdynnol extractor echdynnwr extractor fan gwyntyll echdynnu extractor fans gwyntyll echdynnu extractors echdynnwr extracts detholiad (=part of something) extracts echdynnyn (=something extracted) extracts rhanfap (of map) extracts rhin (of meat) extradition estraddodi extrados of an arch cromlin allanol bwa extraneous allanol (=outside) extraneous estron (=foreign) extrapolate allosod extrapolation allosodiad extrapolations allosodiad extraterritorial alldiriogaethol extreme eithaf extreme pressure oil olew gwasgedd eithaf (E.P.) extreme pressure oils olew gwasgedd eithaf (E.P.) extreme unction eneiniad olaf extreme unctions eneiniad olaf extreme value gwerth eithaf extreme values gwerth eithaf extreme west gorllewin eithaf extreme wests gorllewin eithaf extremely thankful hynod ddiolchgar extremes eithafion extremes of weather eithafion tywydd extremist eithafol extremist eithafwr extremists eithafwr extremities eithafoedd extrinsic anghynhenid extrovert allblyg extrude allwthio extrusion allwthiad extrusions allwthiad extrusive allwthiol extrusive rock craig allwthiol extrusive rocks craig allwthiol exudate archwys exudates archwys exudation archwysiad exudations archwysiad exude archwysu eye crau (=hole in needle etc) eye llygad (=organ of sight) eye bolt bollt ddolen eye bolts bollt ddolen eye contact cyswllt llygaid eye contacts cyswllt llygaid eye lens lens y llygad eye movement symudiad llygad eye movements symudiad llygad eye muscle cyhyr llygad eye muscles cyhyr llygad eye of hammer crau morthwyl eye of needle crau nodwydd eye ring cylch llygad eye rings cylch llygad eye tooth dant llygad eye tooths dant llygad eye-level llinell orwel eye-level grill gridyll uchel eye-level grills gridyll uchel eye-levels llinell orwel eyeball pelen y llygad eyeballs pelen y llygad eyebrow ael eyebrows ael eyelash blewyn amrant eyelashs blewyn amrant eyelet llygaden eyelet hole twll llygaden eyelet holes twll llygaden eyelet pliers gefelen llygaden eyelet punch tyllwr llygadennau eyelet punches tyllwr llygadennau eyelet tools offer llygadennu eyelets llygaden eyepiece sylladur (microscope) eyepiece graticule sylladur graticwl eyepiece graticules sylladur graticwl eyepieces sylladur (microscope) eyot ynysig eyots ynysig eyre cylchdaith (of justices) eyres cylchdaith (of justices) fabric ffabrig fabric colour lliw ffabrig fabric colours lliw ffabrig fabric conditioner cyflyrydd ffabrig fabric conditioners cyflyrydd ffabrig fabric craft crefft ffabrig fabric crafts crefft ffabrig fabric dressing gorchudd ffabrig fabric dressings gorchudd ffabrig fabric dye llifyn ffabrig fabric dyes llifyn ffabrig fabric medium cyfrwng ffabrig fabric mediums cyfrwng ffabrig fabric printing printio ffabrig fabric printing mallet gordd brintio ffabrig fabric printing mallets gordd brintio ffabrig fabric softener cyflyrydd ffabrig fabric softeners cyflyrydd ffabrig fabricate ffabrigo fabricated ffabrigedig fabrics ffabrig facade ffasâd facades ffasâd face wyneb face wynebu face downwards wyneb i waered face edge ymyl wyneb face edge mark marc ymyl wyneb face edge marks marc ymyl wyneb face edges ymyl wyneb face plate plât wyneb face plates plât wyneb face side ochr wyneb face sides ochr wyneb face the direction of the throw wynebu cyfeiriad y tafliad face the net wynebu'r rhwyd face to face wyneb yn wyneb face value wynebwerth face values wynebwerth face vault llofnaid wyneb face vaults llofnaid wyneb face veneer argaen wyneb face veneers argaen wyneb face-centred cubic ciwbig wyneb-ganolog face-centred cubic lattice dellten giwbig wyneb-ganolog face-centred cubic lattices dellten giwbig wyneb-ganolog faced hem hem wedi'i hwynebu faced hems hem wedi'i hwynebu faced opening agoriad wedi'i wynebu faced openings agoriad wedi'i wynebu faced plywood pren haenog wedi'i wynebu faced plywoods pren haenog wedi'i wynebu faced scalloping sgolop wedi'i wynebu faced scallopings sgolop wedi'i wynebu faceplate turning turnio ar wynebplat faces wyneb facet ffased faceted spur sbardun ffasedaidd faceted spurs sbardun ffasedaidd facets ffased facial wynebol facial nerve nerf wynebol facial nerves nerf wynebol facial plane plân wynebol facial planes plân wynebol facies gwedd facilitate hwyluso facilitated transport cludiant cynorthwyedig facilitated transports cludiant cynorthwyedig facilitator hwyluswr facilitators hwyluswr facilities cyfleusterau facilities and amenities cyfleusterau a mwynderau facility dawn (=aptitude) facility rhwyddineb (=ease, fluency) facing wynebyn facing fillet ffiled wynebu facing fillets ffiled wynebu facing left wynebu'r chwith (of lathe tools) facing right wynebu'r dde (of lathe tools) facing tool erfyn wynebu facing tools erfyn wynebu facings wynebyn facsimile ffacsimili facsimile message neges ffacs facsimile messages neges ffacs facsimile number rhif ffacs facsimile numbers rhif ffacs facsimiles ffacsimili fact ffaith faction carfan factionalism carfanyddiaeth factionalisms carfanyddiaeth factions carfan factor ffactor factor analysis dadansoddi ffactorau factorial ffactoraidd factorial ffactorial factorial ecology ecoleg ffactoraidd factorials ffactorial factorizable ffactoriadwy factorization ffactoriad factorizations ffactoriad factorize ffactorio factorize completely ffactorio yn llwyr factorizing ffactoriaeth factorizings ffactoriaeth factors ffactor factors of production ffactorau cynhyrchu factory ffatri factory farming ffermio gorddwys factory legislation deddfwriaeth ffatri factory legislations deddfwriaeth ffatri factory shop siop ffatri factory shops siop ffatri factory system trefn ffatri factory systems trefn ffatri facts ffaith facultative amryddawn (in biology) faculty cyfadran (group of subject departments) faculty cynneddf (=aptitude or inherent power) fad chwiw fade colli lliw (of colour) fade pylu (of image on screen) faeces ymgarthion faggot ffagotsen faggot stitch pwyth ffagod faggot stitches pwyth ffagod faggot weld weldiad ffagod faggot welds weldiad ffagod faggots ffagotsen faggotting ffagodwaith faggottings ffagodwaith fagotto fagotto faience faience (=pottery) faiences faience (=pottery) failure methiant failure to thrive diffyg cynnydd failures methiant faint llewyg faint llewygu faint relief tirwedd anamlwg faint reliefs tirwedd anamlwg faints llewyg fair teg fair catch daliad glân fair catches daliad glân fair ground tir teg fair grounds tir teg fair play chwarae teg fair test prawf teg fair testing profi teg fair tests prawf teg fair trading masnachu teg fairway sianel fordwyo (for shipping) fairy tale stori tylwyth teg fairy tales stori tylwyth teg faith ffydd faiths ffydd fake ffug fake ffugio fake ffugwaith fakes ffugwaith falconer hebogydd falconers hebogydd fall cwymp fall line llinell gwymp fall lines llinell gwymp fallen angel angel syrthiedig fallen angels angel syrthiedig falling rolls gostyngiad mewn nifer fallout llwch ymbelydrol (radioactive) fallouts llwch ymbelydrol (radioactive) fallow braenar (land) fallow braenaru (land) fallows braenar (land) falls cwymp false ffug (in general) false gau (of prophets etc) false attack ffug ymosod false bedding ffug haenau false close diweddeb annisgwyl false closes diweddeb annisgwyl false entry camgydiad false front ffrynt ffug (of drawer) false fronts ffrynt ffug (of drawer) false fruit ffug ffrwythyn false fruits ffug ffrwythyn false hem hem ffug false hems hem ffug false relation gau berthynas false relations gau berthynas false root gwreiddyn ffug false roots gwreiddyn ffug false tooth dant gosod false tooths dant gosod faltung ffaltwng faltungs ffaltwng familial teuluol familiar context cyd-destun cyfarwydd familiar contexts cyd-destun cyfarwydd familiarisation trip taith ymgyfarwyddo familiarisation trips taith ymgyfarwyddo familiarize oneself with ymgyfarwyddo â family teulu family allowance lwfans teulu family allowances lwfans teulu family credit credyd teulu family credits credyd teulu family doctor meddyg teulu family doctors meddyg teulu family group grŵp teulu family grouping grwpio teuluol family groups grŵp teulu family life bywyd teuluol family lifes bywyd teuluol family planning cynllunio teulu family planning clinic clinig cynllunio teulu family planning clinics clinig cynllunio teulu family practitioner meddyg teulu family practitioners meddyg teulu family psychotherapy seicotherapi teuluol family therapy therapi teulu family tree cart achau family trees cart achau famine newyn famines newyn fan bwa (=fan shaped object) fan ffan (=keen follower) fan gwyntyll (of device) fan heater tân chwythu fan heaters tân chwythu fan vaulting ffanfowt fan vaultings ffanfowt fan-fold paper papur igam ogam fan-fold papers papur igam ogam fancy ffansi (of needlework etc) fanfare ffanfer fanfares ffanfer fanglomerate bwa malurion fanglomerates bwa malurion fantasia ffantasia fantasias ffantasia fantasy ffantasi fantasy figure ffigur ffantasi fantasy figures ffigur ffantasi fantasy play chwarae ffantasi fanzine ffansîn fanzines ffansîn far pell far side ochr bellaf far sides ochr bellaf farad ffarad farads ffarad farce stwffin (=forcemeat) farces stwffin (=forcemeat) farm fferm farm ffermio farm implements offer fferm farmer ffermwr farmers ffermwr farming community cymuned amaethyddol farms fferm farthingale cylchbais farthingales cylchbais fascia ffasgau fascia board astell dywydd fascia boards astell dywydd fasciated ffasgol fasciation ffasgedd fasciations ffasgedd fascicle ffasgell fascicles ffasgell fascicular ffasgellol fascism ffasgaeth fascisms ffasgaeth fascist ffasgaidd fascist ffasgydd fascist dictator unben ffasgaidd fascist dictators unben ffasgaidd fascists ffasgydd fashion ffasiwn fashion trend gogwydd ffasiwn fashion trends gogwydd ffasiwn fashions ffasiwn fast anniflan (of colour) fast cyflym fast ympryd fast ymprydio fast access storage storfa fuangyrch fast access storages storfa fuangyrch fast ball pêl gyflym fast balls pêl gyflym fast bowler bowliwr cyflym fast bowlers bowliwr cyflym fast bowling bowlio cyflym fast colour lliw anniflan (enamelling colour) fast colours lliw anniflan (enamelling colour) fast dye llifyn anniflan fast dyes llifyn anniflan fast food bwyd cyflym fast foods bwyd cyflym fast reaction adwaith cyflym fast reactions adwaith cyflym fast starter cychwynnwr cyflym fast starters cychwynnwr cyflym fasten bachu (with hook) fasten clymu (with rope) fasten hoelio (with nails) fastener ffasnydd fasteners ffasnydd fastening device dyfais sicrhau fastening devices dyfais sicrhau fastening screw sgriw sicrhau fastening screws sgriw sicrhau fastenings dull cau fastness anniflanedd (of colour) fasts ympryd fat braster fat depot storfa fraster fat depots storfa fraster fat globule globwl braster fat globules globwl braster fat pigment pigment bras fat pigments pigment bras fat soluble vitamin fitamin braster-hydawdd fat soluble vitamins fitamin braster-hydawdd fatal dose dos angheuol fatal doses dos angheuol fatal error gwall angheuol fatal errors gwall angheuol father tape mam-dâp father tapes mam-dâp fathom gwryd fathoms gwryd fatigue lludded (of muscle, metal) fatigues lludded (of muscle, metal) fatty brasterog fatty acid asid brasterog fatty acids asid brasterog fatty marrow mêr brasterog fatty marrows mêr brasterog fatty meat cig gwyn fatty meats cig gwyn fault bai (=blame) fault diffyg (=defect) fault ffawt (in geology and tennis) fault ffawtio (in geology and tennis) fault line ffawtlin fault lines ffawtlin fault processing system system prosesu diffygion fault processing systems system prosesu diffygion fault rate cyfradd diffygion fault rates cyfradd diffygion fault status statws diffyg fault zone cylchfa ffawtio fault zones cylchfa ffawtio faulted strata haenau ffawtiedig faults bai (=blame) faults diffyg (=defect) faults ffawt (in geology and tennis) faulty diffygiol faulty bully bwli cam faulty goods nwyddau diffygiol fauna ffawna faux bourdon faux bourdon faux bourdons faux bourdon favour ffafrio favourite ffefryn favourites ffefryn fax ffacs fax ffacsio fax gateway porth ffacs fax header template patrymlun pennawd ffacs fax header templates patrymlun pennawd ffacs fax template templed ffacs fax templates templed ffacs fealty llw ffyddlondeb fealty homage gwrogaeth llw ffyddlondeb fealty homages gwrogaeth llw ffyddlondeb feasibility study astudiaeth dichonoldeb feasible dichonadwy feasible region rhanbarth dichonadwy feasible regions rhanbarth dichonadwy feasible solution datrysiad dichonadwy feasible solutions datrysiad dichonadwy feast gŵyl feast day dydd gŵyl feasts gŵyl feather pluen feather pluo feather key allwedd bluen feather smocking smocwaith pluen feather smockings smocwaith pluen feather stitch pwyth pluen feather stitches pwyth pluen feather weight pwysau plu feathering pluo (pottery decoration) feathers pluen feature arwedd (on surface) feature erthygl nodwedd (=feature article) feature nodwedd (in general) feature film prif ffilm feature films prif ffilm feature length film prif ffilm feature length films prif ffilm feature variants amrywiolion nodwedd features arwedd (on surface) features erthygl nodwedd (=feature article) features nodwedd (in general) features wynepryd (of face) febrile twymynol fecundity ffrwythlonedd federal ffederal federal republic gweriniaeth ffederal federal republics gweriniaeth ffederal federalism ffederaliaeth federalisms ffederaliaeth federate ffederaleiddio federation ffederasiwn federations ffederasiwn fee ffi feed bwydo (in general) feed porthi (livestock) feed porthiant feed dog dannedd (on machine) feed hole twll porthi feed holes twll porthi feed shaft siafft borthi feed shafts siafft borthi feedback adborth feedback adborthi feedback control loop dolen adborth a rheoli feedback control loops dolen adborth a rheoli feedback loop dolen adborth feedback loops dolen adborth feedback sheet dalen adborth feedback sheets dalen adborth feedbacks adborth feeder cyflenwydd (of stream, road etc) feeder ymborthwr (of animal) feeders cyflenwydd (of stream, road etc) feeders ymborthwr (of animal) feeding habits arferion bwyta feeding relationship perthynas bwydo feeding relationships perthynas bwydo feeding-bottle potel fwydo feeding-bottles potel fwydo feeding-time amser bwydo feeding-times amser bwydo feeds porthiant feel naws (=atmosphere) feel teimlad (=touch) feel teimlo feeler gauge medrydd teimlo feeler gauges medrydd teimlo feeling teimlad feelings teimlad feels naws (=atmosphere) feels teimlad (=touch) feigned relic crair ffug feigned relics crair ffug feint ffugio feint of disengagement datgyweddiad ffug feldspar ffelsbar feldspars ffelsbar feldspathic ffelspathig felling cwympo coed (timber) felloe camog felloes camog fellow cymrawd (in university) fellows cymrawd (in university) fellowship cymrodoriaeth (in university) fellowships cymrodoriaeth (in university) felon ffelon felonious ffelonaidd felons ffelon felony ffeloniaeth felsenmeer ffelsenmer felsenmeers ffelsenmer felt ffelt felt buff bwff ffelt felt buffs bwff ffelt felt marker marciwr ffelt felt markers marciwr ffelt felt mop mop ffelt felt mops mop ffelt felt nail hoelen benfawr felt nails hoelen benfawr felt pad pad ffelt felt pads pad ffelt felt pen pen ffelt felt pen drawing llun pen ffelt felt pen drawings llun pen ffelt felt pens pen ffelt felt ring cylch ffelt felt rings cylch ffelt felt work gwaith ffelt felt works gwaith ffelt felt-tip pen pen blaen ffelt felt-tip pens pen blaen ffelt felted carpet carped ffeltiog felted carpets carped ffeltiog felting ffeltin feltings ffeltin felts ffelt female benyw female benywol female gamete gamet benyw female gametes gamet benyw female screw sgriw fenyw female screws sgriw fenyw female thread edau fenyw female threads edau fenyw females benyw feminine benywaidd feminism ffeministiaeth feminisms ffeministiaeth feminist ffeminist feminist ffeministaidd feminist model model ffeministaidd feminist models model ffeministaidd feminist theology diwinyddiaeth ffeministaidd feminists ffeminist femoral morddwydol femur asgwrn y forddwyd femurs asgwrn y forddwyd fen ffen fence ffens fence ffensio fence saw llif ffens fence saws llif ffens fencer ffensiwr fencers ffensiwr fences ffens fenestra ovalis ffenestr hirgron fenlands ffendiroedd fennel ffenigl fennels ffenigl fenstra rotunda ffenestr gron fenstra rotundas ffenestr gron feodary ffeodariad feoffee ffeodai feoffees ffeodai feoffees for impropriation ffeodeion amfeddiad feoffment ffeodiad feoffments ffeodiad feoffor ffeodwr feoffors ffeodwr fermata daliant fermatas daliant ferment eples ferment nodchwilio fermentation eplesiad fermentation science epleseg fermentation sciences epleseg fermentations eplesiad fermentative eplesol fermenter eplesydd fermenters eplesydd ferments eples fermium ffermiwm (Fm) fermiums ffermiwm (Fm) fern rhedynen ferns rhedynen ferric fferrig ferric chloride fferrig clorid ferric chlorides fferrig clorid ferrite fferrit ferrite core craidd fferrit ferrite cores craidd fferrit ferrites fferrit ferro-concrete fferoconcrit ferro-concretes fferoconcrit ferromagnetism fferomagnetedd ferromagnetisms fferomagnetedd ferrous fferrus ferrous core craidd fferrus ferrous cores craidd fferrus ferrous metal metel fferrus ferrous metals metel fferrus ferrule amgarn ferrule slot slot amgarn ferrule slots slot amgarn ferrules amgarn ferry fferi ferry glide llithriad fferi ferry glides llithriad fferi fertile ffrwythlon fertilised ffrwythlonedig fertility ffrwythlondeb fertility rate cyfradd ffrwythlondeb fertility rates cyfradd ffrwythlondeb fertilization ffrwythloniad fertilizations ffrwythloniad fertilize ffrwythloni (in biology) fertilize gwrteithio (in agriculture) fertilizer gwrtaith fertilizers gwrtaith fescue peiswellt fescues peiswellt festival gŵyl festival theatre theatr gŵyl festival theatres theatr gŵyl festivals gŵyl fetch cyrch fetch cyrchu fetch cywain (computer command) fetch / execute cycle cylchred cywain / gweithredu fetch / execute cycles cylchred cywain / gweithredu fetches cyrch fetish ffetish fetishs ffetish fettle ffetlo feud cynnen feudal ffiwdal feudal aid cymhorthdreth ffiwdal feudal aids cymhorthdreth ffiwdal feudal court llys ffiwdal feudal courts llys ffiwdal feudal incident hawl ffiwdal feudal incidents hawl ffiwdal feudal overlord uwcharglwydd ffiwdal feudal overlords uwcharglwydd ffiwdal feudal overlordship uwcharglwyddiaeth ffiwdal feudal overlordships uwcharglwyddiaeth ffiwdal feudal system trefn ffiwdal feudal systems trefn ffiwdal feudalism ffiwdaliaeth feudalisms ffiwdaliaeth feudalize ffiwdaleiddio feuds cynnen fever twymyn fevers twymyn fibre ffibr fibre content cynnwys ffibr fibre contents cynnwys ffibr fibre mat mat ffibr fibre mats mat ffibr fibre optics opteg ffibr fibre pen pen ffibr fibre pens pen ffibr fibre plug plwg ffibr fibre plugs plwg ffibr fibre track trac ffibr fibre tracks trac ffibr fibre washer wasier ffibr fibre washers wasier ffibr fibre-tip pen pen blaen ffibr fibre-tip pens pen blaen ffibr fibreboard bwrdd ffibr fibreboards bwrdd ffibr fibreglass gwydr ffibr fibreglass bar bar o wydr ffibr fibreglass bars bar o wydr ffibr fibreglass racket raced ffibr gwydr fibreglass rackets raced ffibr gwydr fibres ffibr fibril ffibrolyn fibrillation ffibriliad fibrillations ffibriliad fibrils ffibrolyn fibrin ffibrin fibrinogen ffibrinogen fibrinogens ffibrinogen fibrins ffibrin fibroblast ffibroblast fibroblasts ffibroblast fibrocyte ffibrocyt fibrocytes ffibrocyt fibrous ffibrog fibrous coat cot ffibrog fibrous coats cot ffibrog fibrous peat mawn ffibrog fibrous peats mawn ffibrog fibrous root gwreiddyn ffibrog fibrous roots gwreiddyn ffibrog fibula ffibwla fibulas ffibwla fictitious dychmygol fictitious statute statud ffug fictitious statutes statud ffug fiddle ffidil fiddle back cefn crwth fiddle back chair cadair gefn crwth fiddle back chairs cadair gefn crwth fiddler ffidlwr fiddlers ffidlwr fiddles ffidil fief ffiff fiefs ffiff field cae (in agriculture) field maes (of study etc) field maesu field centre canolfan maes field centres canolfan maes field coil coil maes field coils coil maes field data data maes field dependence dibyniaeth maes field dependences dibyniaeth maes field event cystadleuaeth faes field events cystadleuaeth faes field ion microscope microsgop maes ïonau field ion microscopes microsgop maes ïonau field length hyd maes field lengths hyd maes field line llinell faes field lines llinell faes field mapping mapio maes field marshal maeslywydd field marshals maeslywydd field notes nodiadau maes field of force maes grym field of view maes gweld field on the boundary maesu ar y ffin field sketch braslun maes field sketches braslun maes field strength cryfder maes field strengths cryfder maes field test prawf maes field tests prawf maes field worker gweithiwr maes field workers gweithiwr maes field-upgradeable maes-uwchriaddadwy fielder maeswr fielders maeswr fields cae (in agriculture) fields maes (of study etc) fields of pasture tir pori fieldwork gwaith maes fieldwork investigation ymchwiliad gwaith maes fieldwork investigations ymchwiliad gwaith maes fieldwork report adroddiad gwaith maes fieldwork reports adroddiad gwaith maes fieldworks gwaith maes fifth pumed (musical interval) fifth column pumed golofn fifth columns pumed golofn fifths pumed (musical interval) fig ffigysen fight or flight ymladd neu ffoi fighting arm braich ymladd fighting arms braich ymladd figment of imagination creadigaeth y dychymyg figurative ffigurol figurative painting paentiad ffigurol (of painted picture) figurative painting peintio ffigurol (of process or art) figurative paintings paentiad ffigurol (of painted picture) figure ffigur figure eight ffigur wyth figure eights ffigur wyth figured rhifoledig figured bass bas rhifoledig figures ffigur figurine ffiguryn figurines ffiguryn figuring rhifoli figuring of chords rhifoli cordiau filament ffilament filament yarn edau ffilament filament yarns edau ffilament filamentous ffilamentog filaments ffilament filbert shape brush brwsh siâp cneuen filbert shape brushs brwsh siâp cneuen file ffeilio file access cyrchu o ffeil file backup ffeil wrth gefn file backups ffeil wrth gefn file creation creu ffeil file extent maint ffeil file extents maint ffeil file handling trin ffeiliau file librarian llyfrgellydd ffeiliau file librarians llyfrgellydd ffeiliau file maintenance cynnal ffeiliau file name enw ffeil file names enw ffeil file organization trefnu ffeiliau file parts rhannau ffeil file pricker priciwr ffeil file prickers priciwr ffeil file processing prosesu ffeil file protection diogelu ffeil file protection code cod diogelu ffeil file protection codes cod diogelu ffeil file recovery adfer ffeil file store storfa ffeiliau file stores storfa ffeiliau file structure strwythur ffeiliau file structures strwythur ffeiliau filial mabol filiform edeuffurf filigree ffiligri filigrees ffiligri filing menu dewislen ffeilio filing menus dewislen ffeilio filings naddion fill llenwad (e.g. in volcano vent) fill llenwi filled llanw (3rds, 4ths, etc) filled tooth dant â llenwad filled tooths dant â llenwad filler llenwad fillers llenwad fillet ffiled fillet ffiledu fillet gauge medrydd ffiled fillet gauges medrydd ffiled fillet moulding mowldin ffiled fillet mouldings mowldin ffiled fillet weld lleinweldiad fillet welds lleinweldiad fillets ffiled filling llenwad filling rod rhoden lenwi filling rods rhoden lenwi filling station gorsaf betrol filling stations gorsaf betrol filling stitch pwyth llenwi filling stitches pwyth llenwi fillings llenwad fillister plane plaen ffilistr fillister planes plaen ffilistr fills llenwad (e.g. in volcano vent) film ffilm film consumption gwylio ffilmiau film culture diwylliant ffilmiau film cultures diwylliant ffilmiau film form ffurf ffilm film former ffurfiwr ffilm film formers ffurfiwr ffilm film forms ffurf ffilm film journalism newyddiaduraeth ffilm film journalisms newyddiaduraeth ffilm film language iaith ffilm film languages iaith ffilm film library llyfrgell ffilmiau film movement mudiad ffilmiau film movements mudiad ffilmiau film strip stribed ffilm film strips stribed ffilm film synopsis crynodeb o ffilm film trailer rhaglun ffilm film trailers rhaglun ffilm films ffilm filter hidlen (of solid particles) filter hidlo filter hidlydd (of light, sound) filter accumulation cronedd hidlo filter accumulations cronedd hidlo filter bed haen hidlo filter beds haen hidlo filter funnel twndis hidlo filter funnels twndis hidlo filter paper papur hidlo filter papers papur hidlo filter pump pwmp hidlo filter pumps pwmp hidlo filterable virus firws hidladwy filtered coffee coffi wedi'i hidlo filtered coffees coffi wedi'i hidlo filters hidlen (of solid particles) filters hidlydd (of light, sound) filtrate hidlif filtrates hidlif filtration hidliad filtrations hidliad fin asgell final terfynol final cause achos terfynol final causes achos terfynol final concord cytundeb terfynol final concords cytundeb terfynol final domestic demand galw mewnol terfynol final domestic demands galw mewnol terfynol final drive gyriad terfynol final drives gyriad terfynol final outcome gwrthrych terfynol final outcomes gwrthrych terfynol final report adroddiad terfynol final reports adroddiad terfynol final treatment triniaeth derfynol final treatments triniaeth derfynol final velocity cyflymder terfynol finale finale finales finale finals arholiadau terfynol finance ariannu finance cyllid finance the activities ariannu'r gweithgareddau finances cyllid financial ariannol financial aims and objectives nodau ac amcanion ariannol financial boom ffyniant ariannol financial booms ffyniant ariannol financial document dogfen ariannol financial documents dogfen ariannol financial information gwybodaeth ariannol financial informations gwybodaeth ariannol financial performance perfformiad ariannol financial performances perfformiad ariannol financial ratio cymhareb ariannol financial regulations rheoliadau ariannol financial service gwasanaeth ariannol financial services gwasanaeth ariannol financial transaction trafod ariannol financial transactions trafod ariannol financial year blwyddyn ariannol financial year basis sail blwyddyn ariannol financial years blwyddyn ariannol financier ariannwr financiers ariannwr finch pinc finch population poblogaeth y pincod finch populations poblogaeth y pincod finches pinc find darganfod (in general) find darganfyddiad find solutions darganfod atebion findings casgliadau (in report etc) finds darganfyddiad fine dirwy (=penalty) fine dirwyo fine main (of cloth) fine manwl (=worked in slender thread) fine mân (of small particles, print) fine tâl (=payment) fine adjustment cymhwysiad manwl fine adjustments cymhwysiad manwl fine art celfyddyd gain fine arts celfyddyd gain fine beam paladr main fine beams paladr main fine brass wire gwifren bres fain fine brass wires gwifren bres fain fine control rheolaeth fanwl fine control rheolydd manwl (dial switch) fine controls rheolaeth fanwl fine controls rheolydd manwl (dial switch) fine dust llwch mân fine dusts llwch mân fine grain graen mân fine grains graen mân fine grit grit mân fine grits grit mân fine knurl nwrl mân fine knurls nwrl mân fine leg coeswr cul fine legs coeswr cul fine manipulative skills sgiliau llawdrin manwl fine mesh rhwyll fain fine meshs rhwyll fain fine motor skills sgiliau echddygol manwl fine orifice agorfa fach fine orifices agorfa fach fine point pwynt main fine points pwynt main fine structure mân-adeiledd fine structures mân-adeiledd fine surface arwyneb llyfn fine surfaces arwyneb llyfn fine teeth dannedd mân fine texture gwead main fine textures gwead main fineness manedd (of sand, fragments) fineness meinder (of fabric) fines dirwy (=penalty) fines tâl (=payment) fines herbes sawrlysiau cymysg finger bys finger byseddu finger cymbals symbalau bys finger gauge medrydd bys finger gauges medrydd bys finger holds gafaelion bysedd finger hole twll bys finger holes twll bys finger joint uniad bys (box) finger joints uniad bys (box) finger lake llyn hirgul finger lakes llyn hirgul finger paint paent bys finger painting paentiad bys (of painted picture) finger painting peintio bys (of process or art) finger paintings paentiad bys (of painted picture) finger paints paent bys finger plate plât bys finger plates plât bys finger puppet pyped bys finger puppets pyped bys fingered bysedig fingering byseddu fingerprint ôl bys fingerprints ôl bys fingers bys finish gorffen finish gorffeniad finished gorffenedig finished appearance gwedd orffenedig finished appearances gwedd orffenedig finished dimensions dimensiynau gorffenedig finished drawing lluniad gorffenedig finished drawings lluniad gorffenedig finished goods nwyddau gorffenedig finished product cynnyrch gorffenedig finished products cynnyrch gorffenedig finished size maint gorffenedig finished sizes maint gorffenedig finished surface arwyneb gorffenedig finished surfaces arwyneb gorffenedig finishing gorffennu finishing cuts toriadau gorffennu finishing press gwasg orffennu finishing process proses orffennu finishing stove stof orffennu finishing stoves stof orffennu finishing technique techneg orffennu finishing techniques techneg orffennu finishing tools offer gorffennu finishs gorffeniad finite meidraidd finite canon canon gyfanedig finite canons canon gyfanedig finitely generated generadol feidraidd fiord ffiord fiords ffiord fire ffwrndanio (enamel) fire tanio fire tân fire blanket blanced dân fire blankets blanced dân fire bote hawl cynuta fire botes hawl cynuta fire damp nwy pwll glo fire damps nwy pwll glo fire extinguisher diffoddwr tân fire extinguishers diffoddwr tân fire protection diogelwch rhag tân fire protections diogelwch rhag tân fire weld tân weldio firebrick bricsen dân firebricks bricsen dân fireclay clai tân firedamp explosion tanchwa firedamp explosions tanchwa fireguard gard tân fireguards gard tân fireplace lle tân fireplaces lle tân fireproof gwrthdan fireproof material defnydd gwrthdan fireproof materials defnydd gwrthdan fires tân fireside chat sgwrs aelwyd fireside chats sgwrs aelwyd firing tanio (kiln) firing chamber siambr danio firing chambers siambr danio firing fork fforch danio firing forks fforch danio firm cadarn firm cwmni firm joint calliper caliper cymal cadarn firm joint callipers caliper cymal cadarn firm wrist arddwrn cadarn firm wrists arddwrn cadarn firmer chisel cŷn ffyrf firmer chisels cŷn ffyrf firmer gouge gaing gau gefn firmer gouges gaing gau gefn firming piece darn lletemu firming pieces darn lletemu firms cwmni firmware cadarnwedd firn ffirn firns ffirn first aid cymorth cyntaf first aids cymorth cyntaf first angle projection tafluniad ongl gyntaf first angle projections tafluniad ongl gyntaf first cause achos cyntaf first causes achos cyntaf first degree equation hafaliad unradd first degree equations hafaliad unradd first floor llawr cyntaf first floors llawr cyntaf first fold plyg cyntaf first folds plyg cyntaf first fruits blaenffrwyth first generation cenhedlaeth gyntaf first generations cenhedlaeth gyntaf first in - first out cyntaf i mewn - cyntaf allan (FIFO) first inversion gwrthdro cyntaf first inversions gwrthdro cyntaf first language pupil disgybl iaith gyntaf first language pupils disgybl iaith gyntaf first law of thermodynamics deddf gyntaf thermodynameg first movement form ffurf symudiad cyntaf (in music) first movement forms ffurf symudiad cyntaf (in music) first order trefn un first order differential equation hafaliad differol trefn un first order differential equations hafaliad differol trefn un first order reaction adwaith gradd un first order reactions adwaith gradd un first order stream ffrwd gradd un first order streams ffrwd gradd un first orders trefn un first point pwynt cyntaf first points pwynt cyntaf first reported assessment asesiad cyntaf sy'n destun adroddiad first reported assessments asesiad cyntaf sy'n destun adroddiad first serve serf gyntaf first serves serf gyntaf first sharp remove gwyriad y llonnod cyntaf first sharp removes gwyriad y llonnod cyntaf first slip slip cyntaf first slips slip cyntaf first unreported assessment asesiad cyntaf nad yw'n destun adroddiad first unreported assessments asesiad cyntaf nad yw'n destun adroddiad fiscal cyllidol fiscal drag llusgiad cyllidol fiscal drags llusgiad cyllidol fiscal policy polisi cyllidol fish pysgodyn fish bowl exercise ymarfer powlen bysgod fish bowl exercises ymarfer powlen bysgod fish eating bird aderyn pysgysol fish eating birds aderyn pysgysol fish finger bys pysgodyn fish fingers bys pysgodyn fish liver oil olew iau pysgod fish liver oils olew iau pysgod fish meal blawd pysgod fish meals blawd pysgod fish slice sleis bysgod fish slices sleis bysgod fish-tail scroll sgrôl cynffon pysgodyn fish-tail scrolls sgrôl cynffon pysgodyn fishbone stitch pwyth asgwrn pysgodyn fishbone stitches pwyth asgwrn pysgodyn fishcake cacen bysgod fishcakes cacen bysgod fisherman pysgotwr fisherman's joining knot cwlwm pysgotwr fisherman's joining knots cwlwm pysgotwr fishermans pysgotwr fishing pysgota fishing ground pysgodfa fishing grounds pysgodfa fishing village pentref pysgota fishing villages pentref pysgota fishmonger gwerthwr pysgod fishmongers gwerthwr pysgod fishs pysgodyn fissile ymholltog fission ymholltiad fission product cynnyrch ymhollti fission products cynnyrch ymhollti fission reaction adwaith ymholltiad fission reactions adwaith ymholltiad fissions ymholltiad fissure agen fissures agen fist dwrn fists dwrn fit ffit fit ffitio fit-up stage llwyfan cludadwy fit-up stages llwyfan cludadwy fitch hog brush brwsh blew ffwlbart fitch hog brushs brwsh blew ffwlbart fitment dodrefnyn sefydlog fitments dodrefnyn sefydlog fitness ffitrwydd (physical) fitness component elfen ffitrwydd fitness components elfen ffitrwydd fitness test prawf ffitrwydd fitness tests prawf ffitrwydd fits and limits ffitiau a therfynau fitted sheet cynfas ffitiedig fitted sheets cynfas ffitiedig fitted sleeve llawes hirgul fitted sleeves llawes hirgul fitter ffitiwr fitters ffitiwr fitting device dyfais ffitio fitting devices dyfais ffitio fitting line llinell ffitio fitting lines llinell ffitio fitting point pwynt ffitio fitting points pwynt ffitio fittings mân daclau five pump five -minute gun ergyd pum munud five -minute guns ergyd pum munud five bearded rockling brithyll Mair pumbarf five bearded rocklings brithyll Mair pumbarf five ply plywood pren haenog pum haen five ply plywoods pren haenog pum haen five steps pum cam five yard line llinell bumllath five yard lines llinell bumllath five year plan cynllun pum mlynedd five year plans cynllun pum mlynedd five-ply wood pren pum haen five-ply woods pren pum haen fives pump fix gosod (=install) fix pennu (in economics) fix sefydlogi (in photography and biology) fixation sefydlogiad (of biological process) fixations sefydlogiad (of biological process) fixative sefydlyn fixative spray chwistrell sefydlogi fixatives sefydlyn fixator sefydlogydd fixators sefydlogydd fixed gosodedig (=given) fixed penodol (=specified) fixed sefydlog (=unchangeable) fixed asset ased sefydlog fixed assets ased sefydlog fixed capital cyfalaf sefydlog fixed capitals cyfalaf sefydlog fixed composition cyfansoddiad sefydlog fixed compositions cyfansoddiad sefydlog fixed cost cost sefydlog fixed costs cost sefydlog fixed costs figure ffigwr costau sefydlog fixed costs figures ffigwr costau sefydlog fixed dune twyn sefydlog fixed dunes twyn sefydlog fixed exchange rate cyfradd gyfnewid osodedig fixed exchange rates cyfradd gyfnewid osodedig fixed field maes sefydlog fixed fields maes sefydlog fixed fret cribell osod fixed frets cribell osod fixed grill gridyll sefydlog fixed grills gridyll sefydlog fixed guide tywysydd sefydlog fixed guides tywysydd sefydlog fixed interest llog penodol fixed interests llog penodol fixed jaw safn sefydlog fixed jaws safn sefydlog fixed knife cyllell sefydlog (veneer cutting) fixed knifes cyllell sefydlog (veneer cutting) fixed length hyd penodol fixed length record cofnod hyd penodol fixed length records cofnod hyd penodol fixed lengths hyd penodol fixed mass màs penodol fixed mass of gas màs penodol o nwy fixed pin roloc sefydlog fixed pins roloc sefydlog fixed point pwynt sefydlog fixed point arithmetic rhifyddeg pwynt sefydlog fixed point arithmetics rhifyddeg pwynt sefydlog fixed points pwynt sefydlog fixed position safle sefydlog fixed positions safle sefydlog fixed powder colour powdrliw sefydlog fixed powder colours powdrliw sefydlog fixed price pris penodol fixed prices pris penodol fixed seat sedd sefydlog fixed seats sedd sefydlog fixed shelf silff sefydlog fixed shelfs silff sefydlog fixed size reamer agorell maint sefydlog fixed size reamers agorell maint sefydlog fixed steady sadydd disymud fixed table bwrdd sefydlog fixed tables bwrdd sefydlog fixed tub twb sefydlog fixed tubs twb sefydlog fixed word length hyd gair penodol fixed word lengths hyd gair penodol fixer sefydlyn fixers sefydlyn fixing pin pìn sefydlu fixing pins pìn sefydlu fixity of tenure sicrwydd daliadaeth fixture gosodyn fixtures gosodyn fjard ffiard fjards ffiard flaccid llipa flag baner (in general) flag lluman (in sport) flag llumanu flagellum fflagelwm flagellums fflagelwm flageolet beans ffa flageolet flags baner (in general) flags lluman (in sport) flagship llong y llyngesydd flagships llong y llyngesydd flagstone carreg lorio flagstones carreg lorio flake fflaw flake culture diwylliant fflawiau flake cultures diwylliant fflawiau flake test prawf haenu (jam) flake tests prawf haenu (jam) flake white gwyn plwm flake whites gwyn plwm flaked fflawiog flakes fflaw flaky pastry crwst haenog flambé flambé flame fflam flame cell cell fflam flame cells cell fflam flame cutter fflamdorrwr flame cutters fflamdorrwr flame probe chwiliedydd fflam flame probes chwiliedydd fflam flame proof gwrth-fflam flame test prawf fflam flame tests prawf fflam flame-failure device dyfais ailgynnau fflam flame-failure devices dyfais ailgynnau fflam flames fflam flammability fflamadwyedd flammable fflamadwy flan fflan flan ring cylch fflan flan rings cylch fflan flange fflans flange fflansio flange disc disg fflans flange discs disg fflans flanged rail rheilen fflans flanged rails rheilen fflans flanged seam sêm fflans flanged seams sêm fflans flanged spigot sbigot fflans flanged spigots sbigot fflans flanges fflans flank ystlys flanking transmission trawsyriant ochrol flanking transmissions trawsyriant ochrol flanks ystlys flannel gwlanen flannel patch clwt gwlanen flannel patches clwt gwlanen flannel seam sêm wlanen flannel seams sêm wlanen flannelette fflaneléd flannelettes fflaneléd flannels gwlanen flans fflan flap fflap flap pocket poced fflap flap pockets poced fflap flapjacks fflapjacs flapping chwifio flaps fflap flare fflerio flare fflêr flared skirt sgert fflêr flared skirts sgert fflêr flares fflêr flash fflach flash card cerdyn fflachio flash cards cerdyn fflachio flash converter trawsnewidydd fflach flash converters trawsnewidydd fflach flash flood fflachlif flash floods fflachlif flash point fflachbwynt flash points fflachbwynt flashback ôl-fflach flashbacks ôl-fflach flashed fflachedig flashing plygiad plwm (over door, window) flashings plygiad plwm (over door, window) flashover fflachiad flashovers fflachiad flashs fflach flask fflasg flasks fflasg flat fflat (=of little depth) flat fflat (=set of rooms, geographical feature) flat gwastad (=level, smooth) flat bit ebill gwastad flat bits ebill gwastad flat drawer slip drôr-gryfhawr fflat flat drawer slips drôr-gryfhawr fflat flat key lleddf gywair (in old Welsh music) flat locking plate plât cloi fflat flat locking plates plât cloi fflat flat metal axe bwyell fetel fflat flat metal axes bwyell fetel fflat flat organisational structure strwythur trefniadaeth gwastad flat organisational structures strwythur trefniadaeth gwastad flat-rate increase cynnydd unradd flat-rate increases cynnydd unradd flatfish lleden flatfishs lleden flatiron haearn smwddio flatirons haearn smwddio flatness gwastadrwydd flatpack furniture dodrefn fflatpac flatplan cynllun fflat flatplans cynllun fflat flats fflat (=set of rooms, geographical feature) flatten gostwng traw (musical pitch) flattened gwastad flatter fflatiwr flatters fflatiwr flatting fflatio (of forging process) flatulence gwynt flatulences gwynt flatus fflatws flautist ffliwtydd flautists ffliwtydd flavonoid fflafonoid flavonoids fflafonoid flavour blas flavouring cyflasyn flavourings cyflasyn flavours blas flaw diffyg flaws diffyg flax llin flax cord cortyn llin (sash window) flax cords cortyn llin (sash window) flax fibre ffibr llin flax fibres ffibr llin flaxes llin flea chwannen fleas chwannen fleck brychni fleck brychu flecks brychni flecnode fflecnod flecnodes fflecnod fleece cnu fleeces cnu fleecy cnufiog fleshy cnodiog flexibility hyblygrwydd flexibility regime rhaglen hyblygrwydd flexibility regimes rhaglen hyblygrwydd flexible hyblyg (=able to bend without breaking) flexible ystwyth (=supple) flexible cold glue glud oer ystwyth flexible cold glues glud oer ystwyth flexible coupling cyplydd hyblyg flexible couplings cyplydd hyblyg flexible hours scheme cynllun oriau hyblyg flexible hours schemes cynllun oriau hyblyg flexible joint cymal hyblyg flexible joints cymal hyblyg flexible workforce gweithlu hyblyg flexible workforces gweithlu hyblyg flexure plygiant flexure strength nerth plygiant flexure strengths nerth plygiant flexures plygiant flick fflic flick fflicio flick-flack fflic-fflac flick-flacks fflic-fflac flicks fflic flight feather pluen hedfan flight feathers pluen hedfan flip chart siart troi flip charts siart troi float arnofio float fflôt (=swimming aid) floating exchange rate cyfradd cyfnewid arnawf floating exchange rates cyfradd cyfnewid arnawf floating leaf deilen arnawf floating leafs deilen arnawf floating point pwynt arnawf floating point arithmetic rhifyddeg pwynt arnawf floating point arithmetics rhifyddeg pwynt arnawf floating point overflow gorlif pwynt arnawf floating point overflows gorlif pwynt arnawf floating points pwynt arnawf floats fflôt (=swimming aid) flock praidd flock print print ffloc flock prints print ffloc flocked carpet carped ffloc flocked carpets carped ffloc flocks praidd flood llifogydd flood hydrograph hydrograff llifogydd flood hydrographs hydrograff llifogydd flood plain gorlifdir flood plains gorlifdir floor joist trawst llawr floor joists trawst llawr floor level lefel llawr floor levels lefel llawr floor turtle crwban llawr floor turtles crwban llawr floorboard astell floorboards astell flooring saw llif lorio flooring saws llif lorio floorwork gwaith ar y llawr floorworks gwaith ar y llawr floppy disk disg hyblyg floppy disks disg hyblyg flora fflora floral blodeuog (in general) floral fflurol (in biology) floral diagram diagram fflurol floral diagrams diagram fflurol floral formula fformiwla fflurol floral formulas fformiwla fflurol floret blodigyn florets blodigyn florid blodeuog florigen fflorigen florigens fflorigen florist's wire gwifren gwerthwr blodau florist's wires gwifren gwerthwr blodau flotation arnofiad flotations arnofiad flotilla llynges fach flotillas llynges fach flounce fflowns flounces fflowns flounder lleden flounders lleden flour blawd flour improvers cemegion aeddfedu blawd flour paper papur blawd flour papers papur blawd flour paste past blawd flour pastes past blawd flourish blodeuo (of person) flourish ffanffer (=fanfare) flourish rhan flodeuog (=decorative passage) flourishs ffanffer (=fanfare) flourishs rhan flodeuog (=decorative passage) flours blawd floury blodiog flow llif flow llifo flow diagram diagram llif flow diagrams diagram llif flow function llif-ffwythiant flow functions llif-ffwythiant flow indicator dangosydd llif flow indicators dangosydd llif flow of charge llif gwefr flow pattern patrwm llif (of waves) flow patterns patrwm llif (of waves) flow production llif-gynhyrchu flow rate cyfradd llifiant flow rates cyfradd llifiant flow sheet llifddalen flow sheets llifddalen flowchart siart llif flowcharts siart llif flower blodyn flower head fflurben flower heads fflurben flower-inducing period cyfnod peri-blodeuo flower-inducing periods cyfnod peri-blodeuo flowering plant planhigyn blodeuol flowering plants planhigyn blodeuol flowers blodyn flowers of sulphur blawd sylffwr flowery blodeuog flowing garment dilledyn llac flowing garments dilledyn llac flowing water dŵr rhedegog flowing waters dŵr rhedegog flowline llinell rhediad flowlines llinell rhediad flows llif flowstone carreg ddylif flowstones carreg ddylif fluctuate anwadalu (in general) fluctuate tonni (of electric current) fluctuating anwadal fluctuating harmony harmoni anwadal fluctuation anwadaliad fluctuations anwadaliad fluctuative tonnog flue ffliw (in chimney, organ) fluency rhwyddineb (in calculation) flues ffliw (in chimney, organ) fluff fflwff fluff filter hidlen fflwff fluff filters hidlen fflwff fluffing fflwffio fluffs fflwff fluid hylif (=liquid) fluid hylifol (in general) fluid llifydd (of gas or liquid) fluid llifyddol (of gas or liquid) fluid llyfn (of style) fluid flow llif hylifau fluid flows llif hylifau fluid mosaic mosaig hylifol fluid mosaic model model mosaig hylifol fluid mosaic models model mosaig hylifol fluid mosaics mosaig hylifol fluidity llifedd (of gas or liquid) fluidization hylifo fluidized bed gwely llifol fluidized beds gwely llifol fluidizer hylifydd fluidizers hylifydd fluids hylif (=liquid) fluids llifydd (of gas or liquid) fluke llabed (of a whale) flukes llabed (of a whale) flume cafn (=channel) flume ceunant (=ravine) flumes cafn (=channel) flumes ceunant (=ravine) fluoresce fflwroleuo fluorescence fflwroleuedd fluorescences fflwroleuedd fluorescent fflwroleuol fluorescent colour lliw fflwroleuol fluorescent colours lliw fflwroleuol fluorescent dye llifyn fflwroleuol fluorescent dyes llifyn fflwroleuol fluorescent lighting fflwrolau fluorescent lightings fflwrolau fluorescent whitener gwynnydd fflwroleuol fluorescent whiteners gwynnydd fflwroleuol fluorescer fflworesydd fluorescers fflworesydd fluoridation fflworeiddiad fluoridations fflworeiddiad fluoride fflworid fluorides fflworid fluorimeter fflworimedr fluorimeters fflworimedr fluorine fflworin (F) fluorines fflworin (F) fluoroplastics fflworoblastigion fluorosis fflworosis flush cyfwyneb flush gwacáu flush gwrid (=blush) flush rhuthr dŵr (of water) flush bolt bollt gyfwyneb flush bolts bollt gyfwyneb flush door drws cyfwyneb flush doors drws cyfwyneb flush drawer slip drôr-gryfhawr cyfwyneb flush drawer slips drôr-gryfhawr cyfwyneb flush eave bondo cyfwyneb flush eaves bondo cyfwyneb flush joint uniad cyfwyneb flush joints uniad cyfwyneb flush moulding mowldin cyfwyneb flush mouldings mowldin cyfwyneb flush panel panel cyfwyneb flush panels panel cyfwyneb flush rails rheilen gyfwyneb flush surface arwyneb cyfwyneb flush surfaces arwyneb cyfwyneb flush-beaded panel panel gleinio cyfwyneb flush-beaded panels panel gleinio cyfwyneb flushs gwrid (=blush) flushs rhuthr dŵr (of water) flute ffliwt flute rhychu flute player ffliwtydd flute players ffliwtydd fluted rhychiog fluted cutter torrell rychiog fluted cutters torrell rychiog fluted edge ymyl rychiog fluted edges ymyl rychiog fluted flan ring cylch fflan rhychiog fluted flan rings cylch fflan rhychiog fluted hardboard caledfwrdd rhychiog fluted hardboards caledfwrdd rhychiog fluted lace les rhychiog fluted laces les rhychiog fluted reamer agorell rychiog fluted reamers agorell rychiog fluted screwdriver tyrnsgriw rychiog fluted screwdrivers tyrnsgriw rychiog flutes ffliwt fluting rhychwaith flutings rhychwaith flutter tonguing cryndafodi fluttering hwyfo fluvial afonol fluvioglacial material defnyddiau ffrwdrewlifol flux fflwcs flux density dwysedd fflwcs flux linkage cysylltedd fflwcs flux linkages cysylltedd fflwcs flux-turns interlinkage cydgysylltedd troadau fflwcs flux-turns interlinkages cydgysylltedd troadau fflwcs fluxes fflwcs fluxing agent cyfrwng fflycsio fluxing agents cyfrwng fflycsio fluxocarbon fflwcsocarbon fluxocarbons fflwcsocarbon fly cutter cŷn hedegog fly cutters cŷn hedegog fly kick cic wib fly kicks cic wib fly milling cutter melinwr hedegog fly on the wall documentary rhaglen ddogfen ‘pry ar y wal’ fly opening copis fly openings copis fly press gwasg hedegog fly spring naid ddeudroed fly springs naid ddeudroed fly stitch pwyth pryf fly stitches pwyth pryf fly weight pwysau pryf fly-leaf dalen frig fly-leafs dalen frig flying picket picedwr gwib flying pickets picedwr gwib flying shore ateg fwa flying shores ateg fwa flying shuttle gwennol hedegog flying shuttles gwennol hedegog flying tackle tacl wib flying tackles tacl wib flyover trosffordd flyovers trosffordd flyspring sbring deudroed flysprings sbring deudroed flywheel chwylrod flywheels chwylrod foam ewyn (=mass of bubbles) foam ewynnu foam sbwng (filling) foam rubber rwber sbwng foam rubbers rwber sbwng foam stabilizer sefydlogydd trochion foam stabilizers sefydlogydd trochion foambacked cefnsbwng foams ewyn (=mass of bubbles) foams sbwng (filling) focal ffocal focal length hyd ffocal focal lengths hyd ffocal focal point canolbwynt (of concentration etc) focal point pwynt ffocal (in optics etc) focal points canolbwynt (of concentration etc) focal points pwynt ffocal (in optics etc) focus canolbwynt (of concentration, earthquake etc) focus canolbwyntio (=concentrate) focus ffocws (in optics etc) focus ffocysu (in optics etc) focus area ardal ffocws focus areas ardal ffocws focus film ffilm ffocws focus films ffilm ffocws focus group grŵp ffocws focus groups grŵp ffocws focused canolbwyntiedig fodder porthiant fodder crop cnwd porthiant fodder crops cnwd porthiant fodders porthiant foetal alcohol syndrome syndrom alcohol y ffoetws foetal alcohol syndromes syndrom alcohol y ffoetws foetal membrane pilen y ffoetws foetal membranes pilen y ffoetws foetus ffoetws fog niwl fog niwlo foggara ffogara foggaras ffogara fogging niwl foggings niwl foil ffoil (=thin metal) foil ffwyl (in fencing) foilist ffwyliwr foilists ffwyliwr foils ffoil (=thin metal) foils ffwyl (in fencing) folar deiliog fold plyg fold plygu fold in cyfuno (in cooking) fold line llinell blygu fold lines llinell blygu fold-away grill gridyll plygu fold-away grills gridyll plygu fold-down screen sgrin blygu fold-down screens sgrin blygu folded plyg folded beds haenau plyg (strata) folded metal back saw llif gefn fetel plyg folded metal back saws llif gefn fetel plyg folded seam sêm blyg folded seams sêm blyg folded wall of the intestine mur plyg y coluddyn folder ffolder folders ffolder folding bars barrau plygu folding keel cilbren plygu folding keels cilbren plygu folding rule riwl blygu folding rules riwl blygu folding wedge lletem gyflin folding wedges lletem gyflin folding work gwaith plygu folding works gwaith plygu folds plyg foliage deiliant foliage sculpture cerflunwaith deiliant foliage sculptures cerflunwaith deiliant foliages deiliant foliated deiliog foliation deiliogrwydd foliations deiliogrwydd folio ffolio folium ffoliwm foliums ffoliwm folk dance dawns werin folk dance twmpath dawns (occasion) folk dance caller geilwad folk dance callers geilwad folk dances dawns werin folk dances twmpath dawns (occasion) folk dancing dawnsio gwerin folk dancing skills sgiliau dawnsio gwerin folk school ysgol werin folk schools ysgol werin folk song cân werin folk songs cân werin folklore llên gwerin folklores llên gwerin follicle ffoligl follicle-stimlating hormone hormon symbylu ffoliglau follicle-stimlating hormones hormon symbylu ffoliglau follicles ffoligl follicular ffoliglaidd follow dilyn follow on dilyn ymlaen follow through dilyn drwodd follow-up dilyniant follow-up dilynol follow-up visit ymweliad dilynol follow-up visits ymweliad dilynol follow-ups dilyniant follower dilynwr followers dilynwr following routes dilyn llwybrau fondant ffondant fondants ffondant font bedyddfaen (for baptism) font ffont (=set of type) fontanelle ffontanél fontanelles ffontanél fonts bedyddfaen (for baptism) fonts ffont (=set of type) food bwyd food additive ychwanegyn bwyd food additives ychwanegyn bwyd food chain cadwyn fwyd food chains cadwyn fwyd food components cydrannau bwyd food composition cyfansoddiad bwyd food compositions cyfansoddiad bwyd food content cynnwys bwyd food contents cynnwys bwyd food cycle cylchred fwyd food cycles cylchred fwyd food digestion treulio bwyd food group grŵp bwyd food groups grŵp bwyd food hygiene hylendid bwyd food hygienes hylendid bwyd food intolerance anoddefgarwch bwyd food intolerances anoddefgarwch bwyd food materials defnyddiau bwyd food mixer cymysgydd bwyd food mixers cymysgydd bwyd food outlet allfa fwyd food outlets allfa fwyd food poisoning gwenwyn bwyd food poisonings gwenwyn bwyd food preparation area lle paratoi bwyd food preparation areas lle paratoi bwyd food preservation cyffeithio bwyd food preservative cyffeithydd bwyd food preservatives cyffeithydd bwyd food processor prosesydd bwyd food processors prosesydd bwyd food product cynnyrch bwyd food product designer dylunydd cynhyrchion bwyd food product designers dylunydd cynhyrchion bwyd food products cynnyrch bwyd food pyramid pyramid bwydydd food pyramids pyramid bwydydd food rationing dogni bwyd food spoilage dirywiad bwyd food spoilages dirywiad bwyd food supplies cyflenwad bwyd food table tabl bwyd food tables tabl bwyd food vessel bwydlestr food vessels bwydlestr food web gwe fwydydd food webs gwe fwydydd food wrap defnydd lapio bwyd food wraps defnydd lapio bwyd food-related custom arfer bwyd food-related customs arfer bwyd foods bwyd foodstuff bwyd foodstuffs bwyd foolscap ffwlsgap foolscaps ffwlsgap foot troed (of body part) foot troedfedd (=measurement) foot and mouth crisis argyfwng clwy'r traed a'r genau foot bellows megin droed foot control rheolydd troed (of machine part) foot controls rheolydd troed (of machine part) foot fault ffawt troed foot faults ffawt troed foot glacier troed-rewlif foot glaciers troed-rewlif foot music cerddoriaeth traed foot musics cerddoriaeth traed foot of perpendicular troed y perpendicwlar foot run troedfedd o hyd (of timber) foot runs troedfedd o hyd (of timber) foot super troedfedd sgwâr o bren foot supers troedfedd sgwâr o bren foot-loose industry diwydiant rhyddsymudol foot-rush cwrs traed foot-rushs cwrs traed footage darn o ffilm footages darn o ffilm football pêl-droed football field maes pêl-droed football fields maes pêl-droed football pitch cae pêl-droed football pitches cae pêl-droed football stadium stadiwm pêl-droed football stadiums stadiwm pêl-droed footballer pêl-droediwr footballers pêl-droediwr footballs pêl-droed footbath baddon traed footbaths baddon traed footbridge pompren footbridges pompren footer troedyn footers troedyn foothills godrefryniau foothold gafael troed footholds gafael troed footlights golau'r godre footnote troednodyn footnotes troednodyn footpath llwybr troed footpaths llwybr troed footpower loom gwŷdd troedlath footpower looms gwŷdd troedlath footprint maint troed (in computing) footprint ôl troed (in general) footprints maint troed (in computing) footprints ôl troed (in general) foots troed (of body part) foots troedfedd (=measurement) footstool stôl droed footstools stôl droed footwear esgidiau footwork troedwaith footworks troedwaith forage porthiant forages porthiant foraging chwilota foramen fforamen foramens fforamen force byddin (=army) force gorfodaeth (=compulsion) force gorfodi force grym (in science) force constant cysonyn grym force constants cysonyn grym force exerted grym a roir force fit ffit orwasg force fits ffit orwasg force of gravity grym disgyrchiant force pump pwmp grym force pumps pwmp grym force ratio cymhareb grym force the follow on gorfodi'r dilyn ymlaen forced economy economi gorfodol forced labour llafur gorfodol forced labours llafur gorfodol forced loan benthyciad gorfodol forced loans benthyciad gorfodol forced oscillation osgiliad gorfod forced oscillations osgiliad gorfod forced vibration dirgryniad gorfod forced vibrations dirgryniad gorfod forcemeat stwffin forcemeats stwffin forcemeter mesurydd grym forcemeters mesurydd grym forceps gefel forces byddin (=army) forces gorfodaeth (=compulsion) forces grym (in science) ford rhyd fords rhyd fore blaen fore-brain blaen-ymennydd fore-brains blaen-ymennydd fore-edge painting peintio ymylodol fore-limb coes flaen fore-limbs coes flaen fore-rib asen flaen fore-ribs asen flaen forearm elin forearm deflection eliniad forearm deflections eliniad forearm shield elinwisg forearm shields elinwisg forearms elin forecast rhagolwg forecast rhagweld forecasts rhagolwg foreclose blaen-gau foredeep blaenddwfn foredeeps blaenddwfn foredune cyn-dwyn foredunes cyn-dwyn forefinger mynegfys forefingers mynegfys foreground blaendir foregrounds blaendir forehand blaenllaw forehand side ochr flaenllaw forehand sides ochr flaenllaw forehand stroke ergyd flaenllaw forehand strokes ergyd flaenllaw forehands blaenllaw foreign tramor (=overseas) foreign affair mater tramor foreign affairs mater tramor foreign body corffyn estron foreign exchange cyfnewidfa dramor foreign exchanges cyfnewidfa dramor foreign key allwedd estron foreign policy polisi tramor foreign trade masnach dramor foreign trades masnach dramor foreigner tramorwr foreigners tramorwr foreknowledge rhagwybodaeth foreknowledges rhagwybodaeth foreland penrhyn (=headland) foreland rhagdir (=land in front of something) forelands penrhyn (=headland) forelands rhagdir (=land in front of something) foremast hwylbren blaen foremasts hwylbren blaen forensic hypnosis hypnosis fforensig foresail hwyl flaen (jib) foresails hwyl flaen (jib) foreset bed gwely blaen-haen foreset beds gwely blaen-haen foresheet rhaff flaen foresheets rhaff flaen foreshore blaendraeth foreshores blaendraeth foreshorten rhagfyrhau foreshortening rhagfyriad foreshortenings rhagfyriad foreskin blaengroen foreskins blaengroen forest coedwig forest law cyfraith fforest forest laws cyfraith fforest forest school ysgol goedwig forest schools ysgol goedwig forest soils fforestbriddoedd forester coedwigwr foresters coedwigwr forestry coedwigaeth forests coedwig forfeiture fforffediad forfeitures fforffediad forge gefail forge gofannu forge parts rhannau gefail forgery ffugiad forges gefail forgework gwaith gof forgeworks gwaith gof forging gofaniad forging hammer morthwyl gofannu forging hammers morthwyl gofannu forging process proses ofannu forging tongs gefel ofannu forgings gofaniad forgive maddau forgiveness maddeuant fork fforc (for eating or cooking) fork fforch (for digging or lifting, a divergence of anything) fork centre canol fforch fork centres canol fforch fork chuck crafanc fforch fork chucks crafanc fforch forked fforchog forked tenon tyno fforchog forked tenons tyno fforchog forks fforc (for eating or cooking) forks fforch (for digging or lifting, a divergence of anything) form ffurf (=shape) form ffurfio form ffurflen (=document) form a line-out leinio form a star ffurfio seren form and content ffurf a chynnwys form letter llythyr parod form letters llythyr parod form room ystafell ddosbarth form rooms ystafell ddosbarth form sequences ffurfio dilyniannau form teacher athrawes ddosbarth (female) form teacher athro dosbarth (male) form teachers athrawes ddosbarth (female) form teachers athro dosbarth (male) form tools offer ffurfio form tutor tiwtor dosbarth form tutors tiwtor dosbarth form-feed dalen-borthi form-feed dalen-borthiad form-feeds dalen-borthiad form-line ffurflin form-lines ffurflin formal ffurfiol formal algebra algebra ffurfiol formal algebras algebra ffurfiol formal carer gofalydd ffurfiol formal carers gofalydd ffurfiol formal channel of communication sianel cyfathrebu ffurfiol formal drawing lluniad ffurfiol formal drawings lluniad ffurfiol formal group grŵp ffurfiol formal groups grŵp ffurfiol formal gymnastics gymnasteg ffurfiol formal logic rhesymeg ffurfiol formal logics rhesymeg ffurfiol formal operational stage stad weithredu ffurfiol formal operational stages stad weithredu ffurfiol formal operational thought meddwl gweithredu ffurfiol formal operational thoughts meddwl gweithredu ffurfiol formal parameter paramedr ffurfiol formal parameters paramedr ffurfiol formal pattern patrwm ffurfiol formal patterns patrwm ffurfiol formal proof prawf ffurfiol formal proofs prawf ffurfiol formal science education addysg wyddonol ffurfiol formal science educations addysg wyddonol ffurfiol formaldehyde fformaldehyd formaldehydes fformaldehyd formant fformant formants fformant format fformat format fformatio format-mode modd fformat format-modes modd fformat formation ffurfiant (in general) formation trefniant (=arrangement) formations ffurfiant (in general) formations trefniant (=arrangement) formative ffurfiannol formative assessment asesiad ffurfiannol formative assessments asesiad ffurfiannol formative evaluation gwerthusiad ffurfiannol formative evaluations gwerthusiad ffurfiannol formative recording cofnodi ffurfiannol formats fformat formatter fformatydd formatters fformatydd formed follower dilynwr ffurfiedig formed followers dilynwr ffurfiedig former ffurfydd former lake cynlyn former lakes cynlyn formers ffurfydd formic acid asid fformig formic acids asid fformig formica fformica formicas fformica forming tool erfyn ffurfio forming tools erfyn ffurfio forms ffurf (=shape) forms ffurflen (=document) forms of equation of the circle ffurfiau hafaliad y cylch formula fformiwla formulary fformiwlari formulas fformiwla formwork ffurfwaith formworks ffurfwaith fort caer fortepiano fortepiano fortification caer fortifications caer fortified manor house maenordy ag amddiffynfeydd fortified manor houses maenordy ag amddiffynfeydd fortify atgyfnerthu fortress caer forts caer forty-shilling freeholder rhydd-ddeiliad deugain swllt forty-shilling freeholders rhydd-ddeiliad deugain swllt forward blaen forward blaenwr (male) forward blaenwraig (female) forward ymlaen forward and back a double llanw a thrai (in dancing) forward and backward ymlaen ac yn ôl forward and downward ymlaen ac i lawr forward and sideways ymlaen ac i'r ochr forward and upward ymlaen ac i fyny forward arc arc flaen forward arcs arc flaen forward arrow saeth ymlaen forward arrows saeth ymlaen forward chaining cadwyno ymlaen forward paddling stroke strôc badlo ymlaen forward paddling strokes strôc badlo ymlaen forward pass pàs ymlaen forward pivot colyn blaen forward pivots colyn blaen forward policy polisi ymwthiol (of imperialist advance) forward reaction blaenadwaith forward reactions blaenadwaith forward roll rhôl ymlaen forward rolls rhôl ymlaen forward rush cwrs blaenwyr forward rushs cwrs blaenwyr forward thrust gwthiad ymlaen forward thrusts gwthiad ymlaen forwards blaen forwards blaenwr (male) forwards blaenwraig (female) fossil ffosil fossil ffosilaidd fossil fuels tanwydd ffosil fossil record cofnod ffosil fossil records cofnod ffosil fossilation ffosileiddiad fossilations ffosileiddiad fossiliferous ffosilifferaidd fossilize ffosileiddio fossils ffosil foster maethu foster care gofal maeth foster carer gofalwr maeth foster carers gofalwr maeth foster cares gofal maeth foster child plentyn maeth foster childs plentyn maeth foster home cartref maeth foster homes cartref maeth foster mother mam faeth foster mothers mam faeth foster parent rhiant maeth foster parents rhiant maeth fosterage cyfundrefn faeth fosterages cyfundrefn faeth foul trosedd foul play chwarae brwnt foul shot cam ergyd foul shots cam ergyd foul throw camdaflu foulard foulard foulards foulard fouling ffowlio fouls trosedd found sefydlu (establish) found material defnydd hapgael found materials defnydd hapgael found object gwrthrych hapgael found objects gwrthrych hapgael foundation sefydliad (=establishment) foundation sylfaen (=base) foundation sylfaenol foundation bolt bollt sylfaen foundation bolts bollt sylfaen foundation colour lliw sylfaen foundation colours lliw sylfaen foundation course cwrs sylfaen foundation courses cwrs sylfaen foundation garment dilledyn sail foundation garments dilledyn sail foundation stage curriculum cwricwlwm cyfnod sylfaen foundation stage curriculums cwricwlwm cyfnod sylfaen foundation stop stop sylfaen foundation stops stop sylfaen foundation subject pwnc sylfaen foundation subjects pwnc sylfaen foundations sefydliad (=establishment) foundations sylfaen (=base) founder sylfaenydd founders sylfaenydd founding bwrw haearn (e.g. iron) foundry ffowndri foundry ladle lletwad ffowndri foundry ladles lletwad ffowndri foundry mould mowld ffowndri foundry moulds mowld ffowndri foundry sand tywod ffowndri foundry sands tywod ffowndri four pedwar four ball pedair pêl four balls pedair pêl four figure table tabl pedwar ffigur four figure tables tabl pedwar ffigur four hundred metres pedwar can metr four in one canon canon bedwar yn un four lane highway ffordd fawr pedair lôn four points of contact pedwar pwynt cyswllt four-centred arch bwa pedwar canolbwynt four-centred arches bwa pedwar canolbwynt four-division saucer soser bedair rhan four-division saucers soser bedair rhan four-figure grid grid pedwar ffigur four-figure grids grid pedwar ffigur four-jaw chuck crafanc pedair safn four-jaw chucks crafanc pedair safn four-shaft loom gwŷdd pedair siafft four-shaft looms gwŷdd pedair siafft four-stroke pedair strôc four-stroke cycle cylchred pedair strôc four-stroke cycles cylchred pedair strôc four-stroke engine peiriant pedair strôc four-stroke engines peiriant pedair strôc four-way tool post post pedwar erfyn four-way tool posts post pedwar erfyn fours pedwar foursided stitch pwyth petryal foursided stitches pwyth petryal foursome pedwarawd foursomes pedwarawd fourth pedwerydd (interval) fourths pedwerydd (interval) fovea ffofea foveas ffofea fowl cyw iâr fowls cyw iâr fox wedging lletemu cudd fox-wedged wedi'i letemu'n gudd (with masculine nouns) fox-wedged tenon tyno wedi'i letemu'n gudd fox-wedged tenons tyno wedi'i letemu'n gudd foxiness staeniau brown (in wood) foxtrot ffocstrot foxtrots ffocstrot fractal ffractal fractals ffractal fraction ffracsiwn fractional ffracsiynol fractional crystallization grisialu ffracsiynol fractional distillation distyllu ffracsiynol fractionating column colofn ffracsiynu fractionating columns colofn ffracsiynu fractions ffracsiwn fractions of a complete turn ffracsiynau o dro cyflawn fracture toriad fracture torri fractures toriad fragile brau fragment darn fragmentary darniog fragmentation darniad fragmentation of holdings darnio ffermydd fragmentations darniad fragmented tameidiog fragments darn frail bregus frame fframio frame ffrâm frame connector cysylltydd ffrâm frame connectors cysylltydd ffrâm frame construction adeiladwaith ffrâm frame constructions adeiladwaith ffrâm frame of reference ffrâm gyfeirio frame saw llif ffrâm frame saws llif ffrâm frame-weaving worker gweithiwr ffrâm wehyddu frame-weaving workers gweithiwr ffrâm wehyddu framed construction adeiladwaith ffrâm framed constructions adeiladwaith ffrâm framed door drws fframiog framed doors drws fframiog framed roof to fframiog framed roofs to fframiog frames ffrâm framework fframwaith framework member aelod o fframwaith framework members aelod o fframwaith framework of care fframwaith gofal frameworks fframwaith franchise etholfraint (voting right) franchise masnachfraint (in commerce) franchise tir breiniol (land) franchisee deiliad braint franchisees deiliad braint franchises etholfraint (voting right) franchises masnachfraint (in commerce) franchises tir breiniol (land) franchisor breiniwr franchisors breiniwr francium ffranciwm (Fr) franciums ffranciwm (Fr) frankalmoign elusendir frankalmoigns elusendir franklin rhydd-ddeiliad franklins rhydd-ddeiliad frankpledge tangwystl frankpledges tangwystl frater ffreutur fraternal twins gefeilliaid annhebyg (non-identical) fraternity brawdgarwch (=brotherliness) fraternity brawdoliaeth (=group of men) fraters ffreutur fratricide brawd-laddiad fratricides brawd-laddiad fraud twyll frauds twyll fray rhaflad fray rhaflo frayed carpet carped treuliedig frayed carpets carped treuliedig fraying rhaflog frazil ffrasil frazils ffrasil free rhydd free rhyddhau free arm braich rydd (of machine part) free arms braich rydd (of machine part) free bargaining bargeinio rhydd free blending rhyddgymysgu free canon rhyddganon free canons rhyddganon free carbon carbon rhydd free carbons carbon rhydd free church eglwys rydd free churches eglwys rydd free company cwmni hur free counterpoint gwrthbwynt rhydd free counterpoints gwrthbwynt rhydd free curve cromlin rydd free curves cromlin rydd free cutting rhydd-dorri free dancing dawnsio rhydd free electron electron rhydd free electrons electron rhydd free embroidery brodwaith rhydd free energy egni parod free enterprise rhyddfenter free enterprises rhyddfenter free face wyneb rhydd free faces wyneb rhydd free fantasia ffantasia rydd free fantasias ffantasia rydd free flow play chwarae llif rhydd free flowing rhyddlifo free formation trefniant rhydd free formations trefniant rhydd free goods nwyddau di-gost free group grŵp rhydd free groups grŵp rhydd free hit ergyd rydd free hits ergyd rydd free kick cic rydd free kicks cic rydd free machine embroidery brodwaith rhydd â pheiriant free market marchnad rydd free market economy economi marchnad rydd free markets marchnad rydd free metre mesur rhydd free metres mesur rhydd free movement symudiad rhydd free movements symudiad rhydd free painting paentiad rhydd (of painted picture) free painting peintio rhydd (of process or act) free paintings paentiad rhydd (of painted picture) free period gwers rydd free periods gwers rydd free port porthladd rhydd free ports porthladd rhydd free practice ymarfer rhydd free practices ymarfer rhydd free radical radical rhydd free radicals radical rhydd free sale gwerthiant rhydd free sales gwerthiant rhydd free school ysgol rad free schools ysgol rad free slope llethr rhydd free slopes llethr rhydd free space gofod gwag free spaces gofod gwag free stroke symudiad rhydd free strokes symudiad rhydd free style dull rhydd free styles dull rhydd free tenant tenant rhydd free tenants tenant rhydd free thinker rhydd-feddyliwr free thinkers rhydd-feddyliwr free throw tafliad rhydd free throws tafliad rhydd free trade masnach rydd free trades masnach rydd free will ewyllys rydd free wills ewyllys rydd free-body diagram diagram gwrthrych rhydd free-body diagrams diagram gwrthrych rhydd free-fall disgyn yn rhydd free-range egg wy maes free-range eggs wy maes free-range hen iâr faes free-range hens iâr faes free-response question cwestiwn penagored free-response questions cwestiwn penagored free-standing rhydd-sefyll free-standing carcass sgerbwd rhydd-sefyll freedom of a city rhyddfraint dinas freedom of belief rhyddid cred freedom of contract rhyddid contract freedom of thought rhyddid meddwl freehand curve cromlin lawrydd freehand curves cromlin lawrydd freehand design dyluniad llawrydd freehand designs dyluniad llawrydd freehand diagram diagram llawrydd freehand diagrams diagram llawrydd freehand drawing lluniad llawrydd freehand drawings lluniad llawrydd freehand sketch braslun llawrydd freehand sketches braslun llawrydd freehold rhydd-ddaliad freehold land tir rhydd-ddaliol freehold lands tir rhydd-ddaliol freehold property eiddo rhydd-ddaliol freeholder rhydd-ddeiliad freeholders rhydd-ddeiliad freeholds rhydd-ddaliad freely pivot colynnu’n rhydd freeman rhyddfreiniwr freemans rhyddfreiniwr freemason saer rhydd freemasons saer rhydd freephone rhadffôn freephones rhadffôn freeplay chwarae rhydd freeway traffordd freeze rhewi freeze-dry sychrewi freeze-thaw action gwaith rhewi-dadmer freeze-thaw actions gwaith rhewi-dadmer freezer cwpwrdd rhew (cabinet) freezer rhewgell freezer burn llosg rhewgell freezer burns llosg rhewgell freezers cwpwrdd rhew (cabinet) freezers rhewgell freezing compartment blwch rhewi (in fridge) freezing compartments blwch rhewi (in fridge) freezing point rhewbwynt freezing points rhewbwynt freezing rain glasrew freezing rains glasrew freight line lein nwyddau freight lines lein nwyddau freight rate tâl cludo freight rates tâl cludo freight train trên llwythi freight trains trên llwythi frequency amlder (=commonness of occurrence) frequency amledd (=rate of recurrence of vibration etc) frequency distribution dosraniad amlder (of statistics) frequency distributions dosraniad amlder (of statistics) frequency division multiplexing amlblecsu rhaniad amledd frequency of beat amledd curiad frequency of discharge of water amlder gollwng dŵr frequency polygon polygon amlder frequency polygons polygon amlder frequency shift keying allweddu syfliad amledd frequency table tabl amlder (in statistics) frequency tables tabl amlder (in statistics) fresco ffresgo fresh ffres fresh bread bara ffres fresh breads bara ffres fresh breeze awel ffres fresh breezes awel ffres freshwater dŵr croyw freshwaters dŵr croyw fret cribell fret nut talfran fret nuts talfran frets cribell fretsaw llif ffret fretsaws llif ffret fretted cribellog (of musical instrument) fretted rhwyllog (of pattern) fretwork rhwyllwaith fretworks rhwyllwaith friable hyfriw friar brawd friars brawd friary tŷ'r brodyr fricassée fricassée fricassées fricassée friction ffrithiant friction clutch cydiwr ffrithiant friction clutches cydiwr ffrithiant friction drive gyriad ffrithiant friction drives gyriad ffrithiant friction washing golchi ffrithiant friction-compensated ffrithiant-gydadferedig friction-compensateds ffrithiant-gydadferedig frictional grip gafael ffrithiannol frictional grips gafael ffrithiannol frictional unemployment diweithdra ffrithiannol frictional unemployments diweithdra ffrithiannol frictionless diffrithiant frictionless roller rholer diffrithiant frictionless rollers rholer diffrithiant frictions ffrithiant frieze brethyn tewban (material) frieze ffris (architectural) frieze paper papur ffris frieze papers papur ffris friezeman masnachwr brethyn friezemans masnachwr brethyn friezes brethyn tewban (material) friezes ffris (architectural) frigate ffrigad frigates ffrigad frigid zone cylchfa rew frigid zones cylchfa rew frill ffrilen frills ffrilen fringe cwr (of town etc) fringe rhidennu fringe rhidens (=border of loose threads) fringe ymyl (=outer edge) fringe benefit cilfantais fringe benefits cilfantais fringes cwr (of town etc) fringes ymyl (=outer edge) fringing reef ymylriff fringing reefs ymylriff frit ffrit (glaze) frits ffrit (glaze) fritted glaze gwydredd ffrit fritted glazes gwydredd ffrit fritter ffriter fritter batter cytew ffriterau fritter batters cytew ffriterau fritters ffriter frizzling ffrislio frock ffrog frocks ffrog frog jump naid broga frog jumps naid broga frog spawn grifft broga frog spawns grifft broga frond ffrond fronds ffrond front blaen (of position) front ffrynt (of weather) front bodice bodis blaen front bodices bodis blaen front clearance cliriad blaen front clearances cliriad blaen front elevation blaenolwg front elevations blaenolwg front facing wynebyn blaen front facings wynebyn blaen front foot troed flaen front foots troed flaen front loader peiriant blaen-lwytho front loaders peiriant blaen-lwytho front loading kiln odyn blaen-lwytho front loading kilns odyn blaen-lwytho front office service gwasanaeth blaen swyddfa front office services gwasanaeth blaen swyddfa front opening agoriad blaen front openings agoriad blaen front panel panel blaen front panels panel blaen front rake gwyredd blaen front rakes gwyredd blaen front roller rholer blaen front rollers rholer blaen front row rheng flaen front rows rheng flaen front support ymgynnal blaen (in athletics) front suspension hongiad blaen front suspensions hongiad blaen front wall mur blaen front wall out of court line ffin flaen front walls mur blaen front-end processor blaen-brosesydd front-end processors blaen-brosesydd frontal apron ffedog flaen frontal aprons ffedog flaen frontal bone asgwrn talcen frontal bones asgwrn talcen frontal fog niwl ffrynt frontal fogs niwl ffrynt frontal lobe llabed flaen frontal lobes llabed flaen frontal rain glaw ffrynt frontal rains glaw ffrynt frontality blaenluniad frontier ffin frontier district ardal ffiniol frontier districts ardal ffiniol frontier state cyffinwlad frontier states cyffinwlad frontier zone parth ffiniol frontier zones parth ffiniol frontiers ffin frontispiece wynebddarlun frontispieces wynebddarlun frontogenesis ffryntdarddiad frontolysis ffryntwasgariad frontoparietal blaenbaredol frontosphenoidal blaensffenoidol fronts blaen (of position) fronts ffrynt (of weather) frost rhew frost action gwaith rhew frost actions gwaith rhew frost attack ymosodiad gan rew frost attacks ymosodiad gan rew frost heaving gwthiad rhew frost heavings gwthiad rhew frost hollow pant rhew frost hollows pant rhew frost line rhewlin frost lines rhewlin frost shattered rhewfriw frostbite ewinrhew frostbites ewinrhew frosted barugog frosts rhew frothy ewynnog frottage ffrotais (rubbing) frottage ffroteisio frottages ffrotais (rubbing) frozen food market marchnad y bwydydd rhewedig frozen food markets marchnad y bwydydd rhewedig fructose ffrwctos fructoses ffrwctos fruit ffrwyth (in general) fruit ffrwythyn (a single) fruit and vegetables ffrwythau a llysiau fruit bowl ffiol ffrwythau fruit bowls ffiol ffrwythau fruit cake teisen ffrwythau fruit cakes teisen ffrwythau fruit crumble crymbl ffrwythau fruit crumbles crymbl ffrwythau fruit fool ffŵl ffrwythau fruit fools ffŵl ffrwythau fruit juice sudd ffrwythau fruit juices sudd ffrwythau fruit snow eirffrwyth fruit snows eirffrwyth fruiting body ffrwythgorff fruits ffrwyth (in general) fruits ffrwythyn (a single) fruity ffrwythus frustrate drysu (hopes) frustrated rhwystredig frustration rhwystredigaeth frustrations rhwystredigaeth frustum ffrwstwm frustum of cone ffrwstwm côn frustum of pyramid ffrwstwm pyramid frustums ffrwstwm fry ffrio frying pan padell ffrio frying pans padell ffrio fucoxanthin ffwcosanthin fucoxanthins ffwcosanthin fudge cyffug (confectionery) fudges cyffug (confectionery) fuel tanwydd fuel cell cell danwydd fuel cells cell danwydd fuel consumption traul tanwydd fuel consumptions traul tanwydd fuel supply cyflenwad tanwydd fuels tanwydd fugal ffiwgaidd fugato ffiwgato fughetta ffiwgeta fughettas ffiwgeta fugitive ffoadur fugitive colour lliw diflan fugitive colours lliw diflan fugitives ffoadur fugue ffiwg fugue form ffurf ffiwg fugue forms ffurf ffiwg fugues ffiwg fulcrum ffwlcrwm fulcrums ffwlcrwm fulfil cyflawni fulfilling life bywyd boddhaus fulfilling lifes bywyd boddhaus full anthem anthem lawn full anthems anthem lawn full back cefnwr (male) full back cefnwraig (female) full backs cefnwr (male) full backs cefnwraig (female) full bilingualism dwyieithrwydd llawn full bilingualisms dwyieithrwydd llawn full central heating gwres canolog llawn full central heatings gwres canolog llawn full control rheolaeth lawn full controls rheolaeth lawn full cost price pris llawn full cost prices pris llawn full drop llithr llawn full drops llithr llawn full employment cyflogaeth lawn full employments cyflogaeth lawn full helix helics llawn full helixes helics llawn full immersion trochiad llawn full immersions trochiad llawn full knees bend gliniau'n blyg i'r eithaf full moon lleuad lawn full moons lleuad lawn full organ organ lawn full organs organ lawn full radiation pelydriad cyflawn (black body) full radiations pelydriad cyflawn (black body) full range of ability ystod lawn o allu full score sgôr lawn full scores sgôr lawn full screen editor sgrin-olygydd full screen editors sgrin-olygydd full size maint llawn full size court cwrt llawn maint full size courts cwrt llawn maint full sizes maint llawn full stop atalnod llawn full stops atalnod llawn full time amser llawn full times amser llawn full toss pelen lawn full version fersiwn llawn full versions fersiwn llawn full weight rope rhaff bwysau llawn full weight ropes rhaff bwysau llawn full-adder adydd cyflawn full-adders adydd cyflawn full-duplex dwplecs cyflawn full-duplexes dwplecs cyflawn full-length portrait portread hyd llawn full-length portraits portread hyd llawn full-screen llond sgrin full-time llawn amser fuller pannwr fuller's earth pridd y pannwr fuller's earths pridd y pannwr fullering pannu fullering tool erfyn pannu fullering tools erfyn pannu fullers pannwr fulling pannu fulling mill pandy fulling mills pandy fullness llawnder fullsize mock-up brasfodel maint llawn fullsize mock-ups brasfodel maint llawn fumarole mygdwll fumaroles mygdwll fumble ymbalfalu fume mygdarth fume mygdarthu fume cupboard cwpwrdd gwyntyllu fume cupboards cwpwrdd gwyntyllu fumes mygdarth fumigate mygdarthu fuming mygdarthol fun song cân hwyl fun songs cân hwyl function ffwythiant (in mathematics) function swyddogaeth (in general) function code cod swyddogaeth function codes cod swyddogaeth function key bysell swyddogaeth functional ffwythiannol (of mathematical functions) functional swyddogaethol (of purpose or task) functional area adran swyddogaethol functional areas adran swyddogaethol functional art celfyddyd swyddogaethol functional arts celfyddyd swyddogaethol functional assessment asesiad perfformiad functional assessments asesiad perfformiad functional design dylunio swyddogaethol functional difference gwahaniaeth gweithredol functional differences gwahaniaeth gweithredol functional group grŵp gweithredol (in chemistry) functional groups grŵp gweithredol (in chemistry) functional illiteracy anllythrennedd gweithredol functional literacy llythrennedd gweithredol functional niche cilfach weithredol functional niches cilfach weithredol functional reading darllen gweithredol functional readings darllen gweithredol functional surface arwyneb swyddogaethol functional surfaces arwyneb swyddogaethol functionalism swyddogaetholdeb (in psychology) functionalisms swyddogaetholdeb (in psychology) functionalist swyddogaethwr functionalists swyddogaethwr functions ffwythiant (in mathematics) functions swyddogaeth (in general) fund cronfa fundamental sylfaen fundamental sylfaenol fundamental attribution bias tuedd priodoliad sylfaenol fundamental circuit cylched sylfaenol fundamental circuits cylched sylfaenol fundamental discord anghytgord sylfaenol fundamental discords anghytgord sylfaenol fundamental dominant chord cord sylfaenol y llywydd fundamental dominant chords cord sylfaenol y llywydd fundamental dominant discord anghytgord sylfaenol y llywydd fundamental dominant discords anghytgord sylfaenol y llywydd fundamental interval cyfwng sylfaenol fundamental intervals cyfwng sylfaenol fundamental note nodyn sylfaenol fundamental notes nodyn sylfaenol fundamental shape ffurf sylfaenol fundamental shapes ffurf sylfaenol fundamental temperature tymheredd sylfaenol fundamental temperatures tymheredd sylfaenol fundamentalism ffwndamentaliaeth fundamentalisms ffwndamentaliaeth fundamentals sylfaen funds cronfa fundus ffwndws funeral march ymdeithgan angladd funeral marches ymdeithgan angladd fungal ffwngaidd fungal attack ymosodiad ffwng fungal attacks ymosodiad ffwng fungicide ffwngleiddiad fungicides ffwngleiddiad fungus ffwng funicular rheilffordd halio funicular polygon polygon rhaff funicular polygons polygon rhaff funiculars rheilffordd halio funnel twndish funnel stake bonyn twndish funnel stakes bonyn twndish funnels twndish fur cen (in pipes etc) fur ffwr (of animals) fur fabric ffabrig ffwr fur fabrics ffabrig ffwr furlong ystaden furlongs ystaden furnace ffwrnais furnaces ffwrnais furnished accommodation llety wedi'i ddodrefnu furnished accommodations llety wedi'i ddodrefnu furnishing fabric ffabrig dodrefnu furnishing fabrics ffabrig dodrefnu furniture dodrefn furniture beetle chwilen ddodrefn furniture beetles chwilen ddodrefn furniture polish llathrydd dodrefn furniture polishs llathrydd dodrefn furniture store siop ddodrefn furniture stores siop ddodrefn furniture wax cwyr dodrefn furniture waxes cwyr dodrefn furrow cwys furrows cwys further education addysg bellach further educations addysg bellach further recognised stroke strôc gydnabyddedig bellach further recognised strokes strôc gydnabyddedig bellach fuse ffiws (of device) fuse ffiwsio (when a fuse blows) fuse ymdoddi (=melt) fuse ymdoddiad (=melt) fused ymdoddedig fuses ffiws (of device) fuses ymdoddiad (=melt) fusible ymdoddadwy fusible alloy aloi ymdoddadwy fusible clay clai ymdoddadwy fusiform gwerthydffurf fusiforms gwerthydffurf fusing factor ffactor ymdoddi fusing factors ffactor ymdoddi fusing point ymdoddbwynt fusing points ymdoddbwynt fusion ymasiad (nuclear, cells etc) fusion ymdoddiad (=melting) fusions ymasiad (nuclear, cells etc) fusions ymdoddiad (=melting) future generations cenedlaethau i ddod future teaching addysgu pellach futurism dyfodoliaeth futurisms dyfodoliaeth futuristic dyfodolaidd fuzzification niwlo fuzzy logic rhesymeg niwlog fuzzy logics rhesymeg niwlog fuzzy set set niwlog fuzzy sets set niwlog g cydbwysedd (=balance) gabbro gabro gaberdine gaberdîn gable end talcen gable ends talcen gadget dyfais gadgets dyfais gadolinium gadoliniwm (Gd) gadoliniums gadoliniwm (Gd) gain cynnydd (=increase) gain ennill (=profit) gain access cael mynediad gain confidence ennill hyder gain control rheolydd cynnydd gain controls rheolydd cynnydd gain ground ennill tir gainful worker gweithiwr cyflog gainful workers gweithiwr cyflog gains cynnydd (=increase) gains ennill (=profit) gait cerddediad gaiter coesarn gaiters coesarn gaits cerddediad galactagogue blithogydd galactagogues blithogydd galactic galaethog galactosaemia galactosaemia galactosaemias galactosaemia galactose galactos galactoses galactos galaxy galaeth gale tymestl galena galena galenas galena gales tymestl gall ardyfiant planhigol (on plants) gall bustl (bile) gall-bladder coden y bustl gall-bladders coden y bustl galleon galiwn galleons galiwn gallery oriel (in the arts) gallery ponc (in quarrying) gallery forest coedwig galeri gallery forests coedwig galeri galley gali galliard galliard galliards galliard gallipot pot golchdrwyth gallipots pot golchdrwyth gallium galiwm (Ga) galliums galiwm (Ga) gallon galwyn gallons galwyn gallop carlam gallop carlamu gallops carlam galls ardyfiant planhigol (on plants) galls bustl (bile) gallstone carreg y bustl gallstones carreg y bustl galvanic galfanig galvanization galfaneiddiad galvanizations galfaneiddiad galvanize galfanu galvanized galfanedig galvanized iron haearn galfanedig galvanized irons haearn galfanedig galvanized window ffenestr alfanedig galvanized windows ffenestr alfanedig galvanized wire gwifren alfanedig galvanized wires gwifren alfanedig galvanometer galfanomedr galvanometers galfanomedr gamba gamba (organ stop) gambas gamba (organ stop) gamboge tint arlliw gamboge gamboge tints arlliw gamboge game gêm game form ffurf ar gêm game forms ffurf ar gêm game laws deddfau helwriaeth game theory damcaniaeth gemau gamekeeper ciper gamekeepers ciper games gêm games equipment offer chwaraeon games teacher athrawes chwaraeon (female) games teacher athro chwaraeon (male) games teachers athrawes chwaraeon (female) games teachers athro chwaraeon (male) gamete gamet gametes gamet gametocyte gametocyt gametocytes gametocyt gametogenesis gametogenesis gametophore gametoffor gametophores gametoffor gametophyte gametoffyt gametophytes gametoffyt gamgee gwlân gamgees gwlân gamma radiation pelydriad gama gamma radiations pelydriad gama gamma ray pelydryn gama gamopetalous gamopetalog gamosepalous gamosepalog gamut gamwt gamuts gamwt gang gang ganglion ganglion ganglionic ganglionig ganglions ganglion gangrene madredd gangrenes madredd gangs gang gap adwy (made for a purpose) gap bwlch (in general) gap town tref adwy gap towns tref adwy gapped bylchog gapped edge ymyl fylchog gapped edges ymyl fylchog garage garej (with a private dwelling) garage modurdy (of commercial enterprise) garages garej (with a private dwelling) garages modurdy (of commercial enterprise) garaging cadw car garbage sbwriel garbages sbwriel garden gardd garden garddio garden city gardd-ddinas gardens gardd gargoyle gargoil gargoyles gargoil garland garlant garlands garlant garment dilledyn garments dilledyn garnet paper papur garnet garnet papers papur garnet garrison garsiwn garrisons garsiwn garter gardys garter stitch pwyth gardys garter stitches pwyth gardys garters gardys gas nwy gas cylinder silindr nwy gas cylinders silindr nwy gas exchange cyfnewid nwyon gas fire tân nwy gas fires tân nwy gas law deddf nwyon gas laws deddf nwyon gas lighter taniwr nwy gas lighters taniwr nwy gas phase gwedd nwy gas phases gwedd nwy gas poker pocer nwy gas pokers pocer nwy gas-liquid chromatography cromatograffaeth hylif nwy gas-ring cylch nwy gas-rings cylch nwy gaseous nwyol gaseous exchange cyfnewid nwyol gaseous exchanges cyfnewid nwyol gash vein craig-wythïen gash veins craig-wythïen gashed edge ymyl wedi'i niweidio gashed edges ymyl wedi'i niweidio gasket gasged gaskets gasged gastight nwyglos gastric gastrig gastric gland chwarren gastrig gastric glands chwarren gastrig gastric juice sudd gastrig gastric juices sudd gastrig gastric pit mân-bant gastrig gastric pits mân-bant gastrig gastro-enteritis gastro-enteritis gastro-enterology gastro-enteroleg gastrocnemius croth y goes gastrointestinal pibell gastroberfeddol (tract) gastrointestinals pibell gastroberfeddol (tract) gastrula gastrwla gastrulas gastrwla gastrulation gastrwliad gastrulations gastrwliad gate adwy (in electronics, computing) gate clwyd (=hurdle) gate llidiart (of garden) gate porthell (in metallurgy) gate and knife tool erfyn porthellu a chyllell gate and knife tools erfyn porthellu a chyllell gate delay oediad adwy gate latch clicied llidiart gate latches clicied llidiart gate tool erfyn porthellu gate tools erfyn porthellu gate vault llofnaid glwyd gate vaults llofnaid glwyd gate-leg table bwrdd coes gât gate-leg tables bwrdd coes gât gated adwyog gatekeeping didoli (in administration of cases) gates adwy (in electronics, computing) gates clwyd (=hurdle) gates llidiart (of garden) gates porthell (in metallurgy) gateway porth gather crych gather crychdynnu gathered fullness llawnder wedi'i grychdynnu gathered lace les wedi'i grychdynnu gathered laces les wedi'i grychdynnu gathered skirt sgert grychog gathered skirts sgert grychog gatherer casglwr (in general) gatherer crychell (machine attachment) gatherers casglwr (in general) gatherers crychell (machine attachment) gathering crychiad (in material) gathering note nodyn casglu gathering notes nodyn casglu gatherings crychiad (in material) gathers crych gauge lled rheilffordd (of railway) gauge medrydd (=instrument) gauge medryddu gauge block bloc medrydd gauge blocks bloc medrydd gauges lled rheilffordd (of railway) gauges medrydd (=instrument) gauze rhwyllen gauze rhwyllog gauze cloth lliain rhwyllog gauze cloths lliain rhwyllog gauze swab swab rhwyllog gauze swabs swab rhwyllog gauzes rhwyllen gavelkind cyfran gavelkinds cyfran gavotte gavotte gavottes gavotte gear gêr (of vehicle, lathe) gear taclau (=equipment) gear mechanism mecanwaith gêr gear mechanisms mecanwaith gêr gear ratio cymhareb gêr gear tooth dant gêr gear tooths dant gêr gear train trên gêr gear trains trên gêr gear wheel olwyn gêr gear wheels olwyn gêr gearbox blwch gêr gearboxes blwch gêr gearing ratio cymhareb geriad gears gêr (of vehicle, lathe) gel gel gel coat araen gel gel coats araen gel gel medium cyfrwng gel gel mediums cyfrwng gel gelatine gelatin gelatine size seis gelatin gelatine sizes seis gelatin gelatines gelatin gelatinous gelaidd gelatinous state cyflwr gelaidd gelatinous states cyflwr gelaidd gelation geliad gelations geliad gelifluction oerlif gelifluctions oerlif gem gem gemma blaguryn gemmas blaguryn gemmule gemwl gemmules gemwl gemshorn gemshorn gemshorns gemshorn gender rhyw (=sex) gender rhyw y person gender bias gogwydd o ran rhyw gender-stereotyped stereoteipio o ran rhyw genders rhyw (=sex) genders rhyw y person gene genyn gene complex cymhlygyn genynnol gene complexes cymhlygyn genynnol gene frequency amlder genynnol gene locus locws genyn gene pool cyfanswm genynnol gene pools cyfanswm genynnol gene recombination adgyfuno genynnol gene therapy therapi genynnau genealogical achyddol genealogy achyddiaeth general cadfridog general cyffredinol general Christian character cymeriad cyffredinol Cristnogol general Christian characters cymeriad cyffredinol Cristnogol general ability gallu cyffredinol general ability test prawf gallu cyffredinol general ability tests prawf gallu cyffredinol general anaesthetic anaesthetig cyffredinol general anaesthetics anaesthetig cyffredinol general defence amddiffyniad cyffredinol general defences amddiffyniad cyffredinol general degree gradd gyffredinol general degrees gradd gyffredinol general election etholiad cyffredinol general elections etholiad cyffredinol general feature nodwedd gyffredinol general features nodwedd gyffredinol general gas equation hafaliad cyffredinol nwy general gas equations hafaliad cyffredinol nwy general hospital ysbyty cyffredinol general hospitals ysbyty cyffredinol general improvement area ardal gwelliannau cyffredinol general improvement areas ardal gwelliannau cyffredinol general medicine meddygaeth gyffredinol general medicines meddygaeth gyffredinol general objective amcan cyffredinol general objectives amcan cyffredinol general pause daliant cyffredinol (of orchestra) general pauses daliant cyffredinol (of orchestra) general post office prif swyddfa'r post general post offices prif swyddfa'r post general practitioner meddyg teulu general practitioners meddyg teulu general purpose area llecyn at ddibenion cyffredinol general purpose areas llecyn at ddibenion cyffredinol general sales gwerthiant cyffredinol general schools budget cyllideb gyffredinol i ysgolion general schools budgets cyllideb gyffredinol i ysgolion general session sesiwn gyffredinol general sessions sesiwn gyffredinol general space gofod cyffredinol general spaces gofod cyffredinol general staff staff milwrol general store siop bob peth general stores siop bob peth general strike streic gyffredinol general strikes streic gyffredinol general subject level lefel gyffredinol y pwnc general subject levels lefel gyffredinol y pwnc general surgery llawfeddygaeth gyffredinol generalisation cyffredinoliad generalisations cyffredinoliad generalised cyffredinoledig generalised animal cell cyffredinoliad o gell anifail generalised animal cells cyffredinoliad o gell anifail generaliseds cyffredinoledig generality cyffredinolrwydd generalize cyffredinoli generals cadfridog generate cynhyrchu (in general) generate generadu (with generator) generating capacity gallu cynhyrchu generation cenhedlaeth (=age-group) generation generadiad (of heat, light) generation time amser mitotig (in biology) generation times amser mitotig (in biology) generations cenhedlaeth (=age-group) generations generadiad (of heat, light) generative cenhedlol generator generadur generator of sound generadur sain generators generadur generic generig generic convention confensiwn generig generic conventions confensiwn generig generic skills sgiliau generig generic theme thema generig generic themes thema generig genes genyn genetic genetig genetic code cod genynnol genetic codes cod genynnol genetic drift symudiad genetig genetic drifts symudiad genetig genetic engineering peirianneg genetig genetic engineerings peirianneg genetig genetic equilibrium cydbwysedd genetig genetic equilibriums cydbwysedd genetig genetic factor ffactor genetig genetic factors ffactor genetig genetic fingerprinting adnabod ôl bys genynnol genetic isolation arwahaniad genynnau genetic isolations arwahaniad genynnau genetic variant amrywiolyn genetig genetic variants amrywiolyn genetig genetic variation amrywiad genetig genetic variations amrywiad genetig genetically modified a’u genynnau wedi’u haddasu genetics geneteg genital cenhedlol genitals organau cenhedlu genius athrylith genocide hil-laddiad genocides hil-laddiad genome genom genomer genomer genomers genomer genomes genom genosome genosom genosomes genosom genotype genoteip genotypes genoteip genotypic genoteipaidd genotypic frequency amlder genoteipaidd genre genre genres genre gentle curve cromlin raddol gentle curves cromlin raddol gentleman bonheddwr gentlemans bonheddwr gentlemen's agreement cytundeb rhwng cyfeillion gentlemen's agreements cytundeb rhwng cyfeillion gently rounded slope llethr esmwyth crwn gently rounded slopes llethr esmwyth crwn gentry bonedd genus genws geoanticline geoanticlin geoanticlines geoanticlin geoboard geofwrdd geoboards geofwrdd geochemical geocemegol geochronology geocronoleg geochronometry geocronometreg geode geod geodes geod geodesic geodesig geodesy geodedd geodetic geodetig geodimeter geodimedr geodimeters geodimedr geographical concept cysyniad daearyddol geographical concepts cysyniad daearyddol geographical context cyd-destun daearyddol geographical contexts cyd-destun daearyddol geographical enquiry ymholiad daearyddol geographical feature nodwedd ddaearyddol geographical features nodwedd ddaearyddol geographical information system system gwybodaeth ddaearyddol geographical information systems system gwybodaeth ddaearyddol geography daearyddiaeth geoid geoid geoids geoid geology daeareg geometric geometrig geometric concept cysyniad geometrig geometric concepts cysyniad geometrig geometric construction lluniad geometrig geometric constructions lluniad geometrig geometric design dyluniad geometrig geometric designs dyluniad geometrig geometric grid grid geometrig geometric grids grid geometrig geometric mean cymedr geometrig geometric means cymedr geometrig geometric pattern patrwm geometrig geometric patterns patrwm geometrig geometric progression dilyniant geometrig geometric progressions dilyniant geometrig geometric series cyfres geometrig geometric shape siâp geometrig geometric shapes siâp geometrig geometric tolerancing goddefiannu geometrig geometrical geometregol geometrical method dull geometregol geometrical methods dull geometregol geometrical proportion cyfrannedd geometregol geometrical proportions cyfrannedd geometregol geometry geometreg geomorphic environment amgylchedd geomorffig geomorphic environments amgylchedd geomorffig geomorphic process proses geomorffig geomorphological geomorffolegol geomorphological process proses geomorffolegol geomorphology geomorffoleg geophysics geoffiseg geophyte geoffyt geophytes geoffyt geopolitics geowleidyddiaeth georgette georgette georgettes georgette geostrophic geostroffig geosyncline geosynclin geosynclines geosynclin geotaxis geotacsis geothermal geothermol geotropism geotropedd geotropisms geotropedd geraniol geraniol geraniols geraniol gerbil gerbil gerbils gerbil geriatric geriatrig geriatrician geriatregydd geriatricians geriatregydd geriatrification heneiddiad geriatrifications heneiddiad germ germ germ layer haenen ymrannu (embryo) germ layers haenen ymrannu (embryo) germ-cell cell genhedlu germ-cells cell genhedlu germanium germaniwm (Ge) germaniums germaniwm (Ge) germinal cenhedlol (relating to reproduction) germinal epithelium epitheliwm cenhedlol germinal epitheliums epitheliwm cenhedlol germinal ridge crib genhedlol germinal ridges crib genhedlol germinate egino germinating seed hedyn eginol germinating seeds hedyn eginol germinating temperature tymheredd egino germinating temperatures tymheredd egino germination eginiad germinations eginiad germs germ gesso geso gestation period cyfnod cario (of woman) gestation period cyfnod cyfebru (of animal) gestation periods cyfnod cario (of woman) gestation periods cyfnod cyfebru (of animal) gesture ystum gesture ystumio gestures ystum geyser geiser geysers geiser ghetto geto giant cawr giant enfawr (cells, chromosomes etc) giant chromosome cromosom enfawr giant chromosomes cromosom enfawr giant molecular moleciwlaidd enfawr giant star seren gawr giant stars seren gawr giant structure adeiledd enfawr giant structures adeiledd enfawr giants cawr gib strip stribed gib gib strips stribed gib gibberellic acid asid giberelig gibberellic acids asid giberelig gibberellin giberelin gibberellins giberelin giddiness pendro gifted dawnus gifted child plentyn dawnus gifted childs plentyn dawnus gigabyte gigabeit (Gb) gigabytes gigabeit (Gb) gigantic anferth gigue gigue gigues gigue gild euro gilded goreurog gilding metal metel euro gilding metals metel euro gill tagell (of fish, mushrooms etc) gill tagellog gill arch bwa tagell gill arches bwa tagell gill filament ffilament tagell gill filaments ffilament tagell gill plate plât tagell gill plates plât tagell gill raker cribin dagell gill rakers cribin dagell gill slit agen y dagell gill slits agen y dagell gills tagell (of fish, mushrooms etc) gilt goreurog gilt glass gwydr goreurog gimlet gimbil gimlet point pwynt gimbil gimlet points pwynt gimbil gimlets gimbil gimp pin pìn gimp gimp pins pìn gimp ginger biscuit bisged sinsir ginger biscuits bisged sinsir gingham gingham ginghams gingham ginnery melin gotwm girder hytrawst girders hytrawst girdle gwregys girdle scar craith gylchog girdle scars craith gylchog girdles gwregys girth cwmpas girths cwmpas given instant ennyd benodol given instants ennyd benodol gizzard glasog gizzards glasog glabrous llyfn glacial rhewlifol glacial chronology cronoleg rewlifol glacial drift drifft rhewlifol glacial drifts drifft rhewlifol glacial erosion erydiad rhewlifol glacial erosions erydiad rhewlifol glacial lake rhewlyn glacial lakes rhewlyn glacial maximum uchafbwynt rhewlifol glacial maximums uchafbwynt rhewlifol glaciate rhewlifo glaciation rhewlifiant glaciations rhewlifiant glacier milk llaeth rhewlif glacier milks llaeth rhewlif glacier snout blaen rhewlif glacier snouts blaen rhewlif glacier sole gwadn rhewlif glacier soles gwadn rhewlif glaciologist rhewlifwr glaciologists rhewlifwr glaciology rhewlifeg glacé cherry ceiriosen glacé gladiator gladiator gladiators gladiator glair glaer glair glaeru glairs glaer glance adlam (=ricochet) glance gwyro (in batting) glances adlam (=ricochet) gland chwarren glands chwarren glandular chwarennol glans penis blaen pidyn glare llacharedd glares llacharedd glass drych (=mirror) glass gwydr (of material or object) glass blowing gwydr-chwythu glass chime clychsain gwydr glass chimes clychsain gwydr glass fibre gwydrffibr glass fibres gwydrffibr glass mat mat gwydr glass mats mat gwydr glass mosaic mosaig gwydr glass mosaics mosaig gwydr glass panel panel gwydr glass panels panel gwydr glass rod rhoden wydr glass rods rhoden wydr glass slab slab gwydr glass slabs slab gwydr glass wool gwlân gwydr glass wools gwlân gwydr glass-reinforced fibre ffibr wedi'i atgyfnerthu â gwydr glass-reinforced fibres ffibr wedi'i atgyfnerthu â gwydr glasscloth brethyn llyfnu glasscloths brethyn llyfnu glasshouse tŷ gwydr glasshouses tŷ gwydr glassware llestri gwydr glassy gwydrog glaucous llwydwyrdd glaucous gull gwylan y gogledd glaucous gulls gwylan y gogledd glaze gwydredd (=glassy covering) glaze gwydro (with glassy covering) glaze sglein (=shine) glaze sgleinio (=shine) glaze firing tanio gwydrog glaze stain staen gwydredd glaze stains staen gwydredd glazed gwydrog (with glassy covering) glazed sglein (=shiny) glazed cotton cotwm sglein glazed cottons cotwm sglein glazed crockery llestri wedi'u gwydro glazed door drws gwydrog glazed doors drws gwydrog glazed paper papur sglein glazed papers papur sglein glazed surface arwyneb gwydrog glazed surfaces arwyneb gwydrog glazes gwydredd (=glassy covering) glazes sglein (=shine) glazing bar bar gwydro glazing bars bar gwydro glebeland clastir glebelands clastir glee club clwb glee glee clubs clwb glee glenoid cavity crau glenoid gley glei gleying gleio glial gliaidd glials gliaidd glide llithriad glide llithro glide llithrydd (sliding door) glider gleider gliders gleider glides llithriad glides llithrydd (sliding door) gliding joint cymal llithro gliding joints cymal llithro glint-line lake llyn glintlin glint-line lakes llyn glintlin glissade glissade glissades glissade global byd-eang (=worldwide) global eang (in computing) global distribution of population dosbarthiad byd-eang poblogaeth global energy egni'r byd global environment amgylchedd byd-eang global environments amgylchedd byd-eang global pattern patrwm byd-eang global patterns patrwm byd-eang global sport chwaraeon byd-eang global tectonic process proses dectonig fyd-eang global trial function ffwythiant prawf globaidd global trial functions ffwythiant prawf globaidd global variable newidyn eang global variables newidyn eang global warming cynhesu byd-eang globalization globaleiddio globe glôb globe artichoke artisiog glôb globe artichokes artisiog glôb globes glôb globular crwn globular clusters clystyrau crwn globule globwl globules globwl globulin globwlin globulins globwlin glockenspiel glockenspiel glockenspiels glockenspiel glomerular filtrate hidlif glomerwlaidd glomerular filtrates hidlif glomerwlaidd glomerulus glomerwlws gloss sglein gloss paint paent sglein gloss paints paent sglein glossopharyngeal glosoffaryngeal glossy sgleiniog glossy cane gwialen loyw glossy canes gwialen loyw glossy finish gorffeniad sgleiniog glossy finishs gorffeniad sgleiniog glossy paper papur sglein glossy papers papur sglein glossy surface arwyneb sglein glossy surfaces arwyneb sglein glottis glotis gloup mordwll gloups mordwll glove maneg glove-puppet pyped maneg glove-puppet movement symudiad pyped maneg glove-puppet movements symudiad pyped maneg glove-puppets pyped maneg gloves maneg glow tywyn glow tywynnu glowing tywynnol glowing splint prennyn yn mudlosgi (in chemistry) glowing splints prennyn yn mudlosgi (in chemistry) glows tywyn glucagon glwcagon glucagons glwcagon glucose glwcos glucose oxidase glwcos ocsidas glucose oxidases glwcos ocsidas glucose tolerance test prawf goddefiad glwcos glucose tolerance tests prawf goddefiad glwcos glucose-1-phosphate glwcos-1-ffosffad glucose-1-phosphates glwcos-1-ffosffad glucoses glwcos glucosuria glwcoswria glucosurias glwcoswria glue glud glue gludio glue block bloc glud glue blocks bloc glud glue brush brwsh glud glue brushs brwsh glud glue ear gormod o gwyr yn y glust glue kettle tegell glud glue kettles tegell glud glue pot pot glud glue pots pot glud glue size seis glud glue sizes seis glud glue sniffing arogli glud glued blocks blociau wedi'u gludio glued-on panel panel wedi'i ludio glued-on panels panel wedi'i ludio glues glud gluing surface arwyneb gludio gluing surfaces arwyneb gludio gluon glwon gluons glwon glutamic acid asid glwtamig glutamic acids asid glwtamig glutamine glwtamin glutamines glwtamin glycerine glyserin glycerines glyserin glycerol glyserol glycerols glyserol glycine glycin glycines glycin glycogen glycogen glycogen synthetase glycogen synthetas glycogen synthetases glycogen synthetas glycogens glycogen glycolysis glycolysis glycoprotein glycoprotein glycoproteins glycoprotein glycoside glycosid glycosides glycosid glycosidic glycosidaidd glyptic art celfyddyd glyptig glyptic arts celfyddyd glyptig gnomonic projection tafluniad nomonig gnomonic projections tafluniad nomonig go about ogamu (in sport) goal cyrchnod (=aim) goal gôl (in sport) goal area cwrt y gôl goal areas cwrt y gôl goal board bwrdd gôl goal boards bwrdd gôl goal kick cic gôl goal kicks cic gôl goal line llinell gôl goal lines llinell gôl goal net rhwyd gôl goal nets rhwyd gôl goal post postyn gôl goal posts postyn gôl goal setting gosod nod (in policy making) goal shooter saethwr goal shooters saethwr goalkeeper gôl-geidwad goalkeepers gôl-geidwad goalpost postyn goalposts postyn goals cyrchnod (=aim) goals gôl (in sport) goat-hair brush brwsh blew gafr goat-hair brushs brwsh blew gafr gobelin stitch pwyth gobelin gobelin stitches pwyth gobelin goblet gobled goblet cell cell gobled goblet cells cell gobled goblets gobled god duw godet godet godets godet goffering goffro goggles goglau going gofod llorwedd (stairs) goings gofod llorwedd (stairs) goitre gwen, y wen goitres gwen, y wen gold aur (Au) gold cushion clustog aur gold cushions clustog aur gold leaf deilen aur gold leaf electroscope electrosgop deilen aur gold leaf electroscopes electrosgop deilen aur gold leafs deilen aur gold medal medal aur gold medals medal aur gold size seis aur gold sizes seis aur gold thread edau aur gold threads edau aur gold tooling foil ffoil offeru aur gold tooling foils ffoil offeru aur gold tooling leaf deilen offeru aur gold tooling leafs deilen offeru aur golden bread crumbs briwsion cras golden rectangle petryal euraid golden rectangles petryal euraid golden rule rheol euraidd golden rules rheol euraidd golden section adran euraid golden sections adran euraid golds aur (Au) goldsmith gof aur goldsmiths gof aur golf links maes golff gomarist gomaraidd gomarist gomarwr gomarists gomarwr gonad gonad gonadotrophic gonadotroffig gonadotrophic hormone hormon gonadotroffig gonadotrophic hormones hormon gonadotroffig gonadotrophin gonadotroffin gonadotrophins gonadotroffin gonads gonad gonorrhoea gonorea gonorrhoeas gonorea good balance cydbwysedd da good balances cydbwysedd da good ball pêl dda good balls pêl dda good length hyd da good length ball bowliad hyd da good length balls bowliad hyd da good lengths hyd da good loser collwr da good losers collwr da good posture ymddaliad da good postures ymddaliad da good practice ymarfer da good practices ymarfer da good proportion cyfrannedd da good proportions cyfrannedd da good quality wood pren o ansawdd da good quality woods pren o ansawdd da good sporting behaviour ymddygiad da wrth chwarae good sporting behaviours ymddygiad da wrth chwarae good technique techneg dda good techniques techneg dda good timing amseru da good works gweithredoedd da good-enough parenting magu digon da goods nwyddau goods and chattels nwyddau a meddiannau goods or services nwyddau neu wasanaethau goodwill ewyllys dda goodwills ewyllys dda googly gwgli goose pimples croen gŵydd gooseberries eirin Mair gooseneck mynwydd gooseneck mynwyddu goosenecks mynwydd gore gôr gored skirt sgert gôr gored skirts sgert gôr gores gôr gorge ceunant gorges ceunant gospel efengyl gospels efengyl gouache gouache gouaches gouache gouge cafnu gouge gaing gau gouge cut toriad gaing gau gouge cuts toriad gaing gau gouged out lake llyn cafnog gouged out lakes llyn cafnog gouges gaing gau govern llywodraethu governance trefn lywodraethol governances trefn lywodraethol governing body corff llywodraethol government llywodraeth government by decree llywodraeth drwy ordinhad government of Wales llywodraeth Cymru government ombudsman ombwdsmon llywodraeth government ombudsmans ombwdsmon llywodraeth government spending gwariant llywodraeth government spendings gwariant llywodraeth government training centre canolfan hyfforddi'r llywodraeth government training centres canolfan hyfforddi'r llywodraeth governments llywodraeth governor llywodraethwr governors llywodraethwr governorship swydd llywodraethwr governorships swydd llywodraethwr graben dyffryn hollt (=rift valley) grabens dyffryn hollt (=rift valley) grace gras grace note addurnod grace notes addurnod graceful degradation diraddiad gosgeiddig graceful degradations diraddiad gosgeiddig graces gras gradation graddiad gradation of accents graddiad acenion gradation of contraction graddio cyfangiad gradation of dissonance graddoliad anghyseinedd gradation of volume graddiad sain gradations graddiad grade gradd grade graddio (=arrange in grades, sort) grade graddoli (=pass gradually between grades, blend) grade description disgrifiad graddau grade descriptions disgrifiad graddau grade of pencil gradd o bensil grade review adolygu graddau grade-related criterion maen prawf gradd berthynol grade-related criterions maen prawf gradd berthynol graded graddedig graded profile proffil graddedig graded profiles proffil graddedig graded test prawf graddedig graded tests prawf graddedig graded word reading test prawf graddedig darllen geiriau graded word reading tests prawf graddedig darllen geiriau grades gradd gradient graddiant gradients graddiant gradients of graphs graddiannau graffiau grading test prawf graddio grading tests prawf graddio gradual graddol gradual graddolen (in church service) graduals graddolen (in church service) graduate graddio graduate person graddedig graduate teacher athrawes raddedig (female) graduate teacher athro graddedig (male) graduate teachers athrawes raddedig (female) graduate teachers athro graddedig (male) graduated graddedig (in general) graduated graddnodedig (of thermometer) graduated flask fflasg raddedig graduated flasks fflasg raddedig graduated pension pensiwn graddedig graduated pensions pensiwn graddedig graduates person graddedig graduation graddnod (of thermometer) graduation ceremony seremoni graddio graduations graddnod (of thermometer) graffito graffito graft impiad graft impio graft hybrid croesryw impiedig graft hybrids croesryw impiedig grafted shoot cyffyn impiedig grafted shoots cyffyn impiedig grafts impiad grain graen (in rock,wood, cloth) grain grawn (food crop) grain gronyn (=particle) grain direction cyfeiriad y graen grain directions cyfeiriad y graen grain markings marciau graen graining graenio graining comb crib graenio graining combs crib graenio grains graen (in rock,wood, cloth) grains grawn (food crop) grains gronyn (=particle) grainy surface arwyneb graenog grainy surfaces arwyneb graenog gram gram grammar school ysgol ramadeg grammar schools ysgol ramadeg gramophone gramoffon gramophones gramoffon grams gram granal granaidd granary granar granary bread bara brown garw granary breads bara brown garw granary flour blawd brown garw granary flours blawd brown garw grand barré grand barré (of the guitar) grand barrés grand barré (of the guitar) grand canonical ensemble ensemble canonaidd mawreddog grand canonical ensembles ensemble canonaidd mawreddog grand duke archddug grand dukes archddug grand inquisitor uchel chwilyswr grand inquisitors uchel chwilyswr grand larceny lladrad mawr grand master uchel feistr grand masters uchel feistr grand opera opera fawreddog grand operas opera fawreddog grand period of growth prif gyfnod tyfiant grand piano piano traws grand prince uchel dywysog grand princes uchel dywysog granddaughter wyres granddaughters wyres grandfather tad-cu grandfather tape nain-dâp grandfather tapes nain-dâp grandfather-father-son principle egwyddor-nain-mam-merch grandfather-father-son principles egwyddor-nain-mam-merch grandfathers tad-cu grandmother mam-gu grandmothers mam-gu grandson ŵyr grandsons ŵyr grange maenor granges maenor granite gwenithfaen granites gwenithfaen grant grant grant maintained school ysgol a gynhelir â grant grant maintained schools ysgol a gynhelir â grant grant sanctuary rhoi noddfa grants grant granular gronynnog granulated gronynnog granulation gronyniad granulation tissue meinwe ronynnog granulation tissues meinwe ronynnog granulations gronyniad granule gronigyn granules gronigyn granulocyte granwlocyt granulocytes granwlocyt granum granwm granums granwm grapefruit grawnffrwyth grapefruits grawnffrwyth graph graff graph paper papur graff graph papers papur graff graph plotter plotydd graff graph plotters plotydd graff graphic graffig graphic art celfyddyd graffig graphic arts celfyddyd graffig graphic design dylunio graffig graphic designer dylunydd graffig graphic designers dylunydd graffig graphic image delwedd graffig graphic images delwedd graffig graphic notation nodiant graffig graphic notations nodiant graffig graphic score sgôr graffig graphic scores sgôr graffig graphical graffigol graphical differentiation differiad graffigol graphical differentiations differiad graffigol graphical display unit uned arddangos graffigol (GDU) graphical display units uned arddangos graffigol (GDU) graphical integration integriad graffigol graphical integrations integriad graffigol graphical technique techneg graffigol graphical techniques techneg graffigol graphical user interface rhyngwyneb defnyddiwr graffigol graphical user interfaces rhyngwyneb defnyddiwr graffigol graphics graffeg (in general) graphics graffigwaith (=graphical work) graphics pad pad graffeg graphics pads pad graffeg graphics tablet llechen graffeg graphics tablets llechen graffeg graphics terminal terfynell graffeg graphics terminals terfynell graffeg graphite graffit graphites graffit graphs graff graptolite graptolit graptolites graptolit grasp gafael grasps gafael grass gwair grass green gwyrdd porfa (enamelling colour) grass greens gwyrdd porfa (enamelling colour) grassland glaswelltir grasslands glaswelltir grated crayon creon mâl grated crayons creon mâl graticule graticiwl (in optical instruments) graticule rhwyll map (on maps) graticule intersection llinellau rhwyllog yn croesi graticules graticiwl (in optical instruments) graticules rhwyll map (on maps) grating gratin gratings gratin grave bedd grave goods nwyddau claddu gravel graean gravel graeanu gravelly graeanog gravels graean graver crafell gravers crafell graves bedd graveyard mynwent graveyards mynwent gravimetric result canlyniad grafimetrig gravimetric results canlyniad grafimetrig gravitate disgyrchu gravitation disgyrchedd gravitational disgyrchol gravitational attraction atyniad disgyrchiant gravitational attractions atyniad disgyrchiant gravitational equipotential surface arwyneb unbotensial disgyrchiant gravitational equipotential surfaces arwyneb unbotensial disgyrchiant gravitational field maes disgyrchiant gravitational field line llinell faes disgyrchiant gravitational field lines llinell faes disgyrchiant gravitational fields maes disgyrchiant gravitational force grym disgyrchiant gravitational forces grym disgyrchiant gravitational potential potensial disgyrchiant gravitational potential difference gwahaniaeth potensial disgyrchiant gravitational potential differences gwahaniaeth potensial disgyrchiant gravitational potentials potensial disgyrchiant gravitational pull tynfa disgyrchiant gravitational pulls tynfa disgyrchiant gravitational slumping cylchlithriad disgyrchiant gravitational slumpings cylchlithriad disgyrchiant gravitational unit uned disgyrchiant gravitational units uned disgyrchiant gravitations disgyrchedd gravity disgyrchiant gravity flow llif disgyrchiant gravity flows llif disgyrchiant gravity moulding moldio disgyrchol gravity pull tynfa disgyrchiant gravity pulls tynfa disgyrchiant gravity slope llethr disgyrchiant gravity slopes llethr disgyrchiant graze clwyf crafiad (of wound) graze crafiad (=scrape) graze crafu (=scrape) graze pori (=feed on grass) grazes clwyf crafiad (of wound) grazes crafiad (=scrape) grazier porfäwr graziers porfäwr grazing incidence prin drawiad (in physics) grazing incidences prin drawiad (in physics) grazing land tir pori grazing lands tir pori grease iro grease saim grease box blwch saim grease boxes blwch saim grease gun gwn saim grease guns gwn saim grease solvent hydoddydd saim grease solvents hydoddydd saim greases saim greasy seimlyd great circle cylch mawr great circles cylch mawr great organ prif organ great organs prif organ great white shark siarc mawr gwyn great white sharks siarc mawr gwyn great-grandchild gorwyr great-grandchilds gorwyr greatest common divisor rhannydd cyffredin mwyaf (=highest common factor) greatest common divisors rhannydd cyffredin mwyaf (=highest common factor) greave coesarf greaves coesarf green belt llain las green belt site safle tir glas green belt sites safle tir glas green belts llain las green field tir glas (in planning etc) green field site safle tir glas green field sites safle tir glas green fields tir glas (in planning etc) green sand tywod llaith green sand mould mowld tywod llaith green sand moulding mowldio tywod llaith green sand moulds mowld tywod llaith green sands tywod llaith green sward glastir green swards glastir green timber pren heb ei sychu (unseasoned) green timbers pren heb ei sychu (unseasoned) green ware crochenwaith heb ei danio green wares crochenwaith heb ei danio greengrocer gwerthwr llysiau (person) greengrocer siop lysiau (shop) greengrocers gwerthwr llysiau (person) greengrocers siop lysiau (shop) greenhouse tŷ gwydr greenhouse effect effaith tŷ gwydr greenhouse effects effaith tŷ gwydr greenhouses tŷ gwydr greens gwyrddion (=environmentalists) greensand tywodfaen gwyrdd greensands tywodfaen gwyrdd greeting card cerdyn cyfarch greeting cards cerdyn cyfarch gregarious cymdeithasgar (of people) gregarious heidiol (of animals) gregariousness cymdeithasgarwch (of people) gregariousness heidioledd (of animals) grenade grenâd grenades grenâd grey llwyd (enamelling colour) grey tywyllu (=darken) grey area ardal lwyd grey areas ardal lwyd grey board bwrdd llwyd grey boards bwrdd llwyd grey cardboard cardbord llwyd grey cardboards cardbord llwyd grey cast iron haearn bwrw llwyd grey cast irons haearn bwrw llwyd grey dune twyn llwyd grey dunes twyn llwyd grey iron haearn llwyd grey irons haearn llwyd grey matter breithell (brain) grey matters breithell (brain) grey modelling clay clai modelu llwyd grey powdered clay clai powdr llwyd grid grid grid bias bias grid grid north gogledd grid grid norths gogledd grid grid reference cyfeirnod grid grid references cyfeirnod grid grid resistor gwrthydd grid grid resistors gwrthydd grid grid system system grid grid systems system grid grid work gwaith grid grid works gwaith grid gridiron sgwarog grids grid grief galar grief reaction adwaith galar grief reactions adwaith galar griefs galar grievance cwyn grievance procedure dull gweithredu cwynion grievance procedures dull gweithredu cwynion grievances cwyn grieving process proses o alaru grike greic grikes greic grill gridyll grille dellt awyru (ventilation) grille gril (of car) grilled chop golwyth o'r gridyll grilled chops golwyth o'r gridyll grilles dellt awyru (ventilation) grilles gril (of car) grills gridyll grimace tynnu wyneb grimace ystum grimaces ystum grind llifanu (=reduce, sharpen or smooth) grind malu (=crush) grind in a mortar malu mewn morter grinder llifanydd grinders llifanydd grinding angle ongl lifanu grinding angles ongl lifanu grinding bevel befel llifanu grinding bevels befel llifanu grinding machine peiriant llifanu grinding machines peiriant llifanu grinding paste past llifanu grinding pastes past llifanu grinding wheel olwyn lifanu grinding wheels olwyn lifanu grindstone maen llifanu grindstone truer cywirwr maen llifanu grindstone truers cywirwr maen llifanu grindstones maen llifanu grip gafael grips gafael grit grut gritaceous grutiog grits grut gritstone carreg grut gritstones carreg grut gritty grutiog groan griddfan groan ochenaid groans ochenaid grocer groser grocers groser grog grog grogs grog groin cesail y forddwyd groins cesail y forddwyd grommet gromed grommets gromed groove rhigol groove punch pwnsh sêm groove punch seaming tool erfyn semio rhigol groove punch seaming tools erfyn semio rhigol groove punches pwnsh sêm grooved rhigolog grooved frame ffrâm rigolog grooved frames ffrâm rigolog grooved nut nyten rigolog grooved nuts nyten rigolog grooved panel panel rhigolog grooved panels panel rhigolog grooved seam sêm rigolog grooved seams sêm rigolog grooved stile cledren rigolog grooved stiles cledren rigolog groover rhigolydd groovers rhigolydd grooves rhigol grooving rhigoli grooving plane plaen rhigoli grooving planes plaen rhigoli grosgrain sidan rib (of silk) grosgrains sidan rib (of silk) gross crynswth (of income etc) gross deuddeg dwsin (=144) gross box office takings crynswth arian am docynnau gross capital cyfalaf crynswth gross capitals cyfalaf crynswth gross income incwm crynswth gross incomes incwm crynswth gross investment buddsoddiad gros gross investments buddsoddiad gros gross loss colled grynswth gross manipulative skills sgiliau llawdrin bras gross motor skills sgiliau echddygol bras gross pay cyflog crynswth gross product lluoswm crynswth gross products lluoswm crynswth gross profit elw crynswth gross profits elw crynswth grotesque grotesg grotto groto ground grwnd (in art) ground almonds almonau mâl ground bass grwndfas ground coat araen grwnd ground coats araen grwnd ground coffee coffi mâl ground coffees coffi mâl ground floor llawr gwaelod ground floors llawr gwaelod ground moraine marian llusg ground moraines marian llusg ground photograph ffotograff lefel y tir ground photographs ffotograff lefel y tir ground plan cynllun llawr ground plans cynllun llawr ground plate grwndblat ground plates grwndblat ground state cyflwr isaf ground states cyflwr isaf ground swell ymchwydd y don ground swells ymchwydd y don ground the ball turio'r bêl ground tissue meinwe daear ground tissues meinwe daear ground water dŵr daear (=phreatic water) ground waters dŵr daear (=phreatic water) ground-rent rhent safle ground-rents rhent safle grounds grwnd (in art) groundsman tirmon groundsmans tirmon groundsmanship tirmonaeth groundsmanships tirmonaeth groundwater dŵr daear groundwaters dŵr daear group cylch (in informal context) group grŵp (in formal context) group twr (=huddle) group activity gweithgaredd grŵp group activity session sesiwn gweithgaredd grŵp group activity sessions sesiwn gweithgaredd grŵp group dynamics dynameg grŵp group family teulu grŵp group interaction rhyngweithio grŵp group leader arweinydd grŵp group leaders arweinydd grŵp group of objects grŵp o wrthrychau group piece darn grŵp group pieces darn grŵp group test prawf grŵp group test of mental ability prawf grŵp o allu ymenyddol group tests prawf grŵp group therapy therapi grŵp grouping of notes cyfosod nodau grouping of rests cyfosod tawnodau groups cylch (in informal context) groups grŵp (in formal context) groups twr (=huddle) grouse grugiar grouses grugiar grout growt grout growtio grouts growt grove llwyn groves llwyn grow tyfu growing point tyfbwynt growing points tyfbwynt growing season tymor tyfu growing seasons tymor tyfu growth twf (act or process of) growth tyfiant (something grown / growing) growth and development twf a datblygiad growth curve cromlin dyfiant growth curves cromlin dyfiant growth cycle cylchred dyfiant growth cycles cylchred dyfiant growth formation ffurf tyfiant growth formations ffurf tyfiant growth hormone hormon twf growth hormones hormon twf growth industry diwydiant twf growth medium cyfrwng cynnal twf growth mediums cyfrwng cynnal twf growth rate cyfradd twf growth rates cyfradd twf growth response twf-ymateb growth responses twf-ymateb growth ring cylch tyfiant growth rings cylch tyfiant growths twf (act or process of) growths tyfiant (something grown / growing) groyne argor groynes argor grub bolt bollt ddigopa grub bolts bollt ddigopa grub-screw sgriw ddigopa grub-screws sgriw ddigopa grubber kick cic bwt grubber kicks cic bwt guanine gwanin guanines gwanin guano giwana guarantee gwarant guarantee gwarantu guaranteed goods nwyddau gwarantiedig guarantees gwarant guarantor gwarantwr guarantors gwarantwr guard gard (of person or device) guard gwarchod guard gwarchodlu (=body of troops) guard cell cell warchod guard cells cell warchod guard plate plât gwarchod guard plates plât gwarchod guard position safiad gwarchod guard positions safiad gwarchod guard rail rheilen warchod guard rails rheilen warchod guardian gwarcheidwad guardian angel angel gwarcheidiol guardian angels angel gwarcheidiol guardians gwarcheidwad guardianship gwarcheidwaeth guardianships gwarcheidwaeth guards gard (of person or device) guards gwarchodlu (=body of troops) guerrilla milwr gerila guerrilla warfare rhyfel gerila guerrilla warfares rhyfel gerila guerrillas milwr gerila guest gwestai guest house gwesty guest houses gwesty guest speaker siaradwr gwadd guest speakers siaradwr gwadd guests gwestai guidance arweiniad (=advice) guidance cyfarwyddyd (=instruction) guidances arweiniad (=advice) guidances cyfarwyddyd (=instruction) guide canllaw (=guideline) guide cyfeirydd (of instrument) guide llywio (behaviour etc) guide tywys (in general) guide tywysydd (of person) guide book arweinlyfr guide books arweinlyfr guide line tywyslinell (of diagram) guide lines tywyslinell (of diagram) guide pin pìn arwain guide pins pìn arwain guide plate plât tywys guide plates plât tywys guide screw sgriw gyfeirio guide screws sgriw gyfeirio guideline canllaw guidelines canllaw guidelines of good practice canllawiau ymarfer da guides canllaw (=guideline) guides cyfeirydd (of instrument) guides tywysydd (of person) guild gild (historical, ecological) guild urdd (in association titles etc) guildhall neuadd y dref guildhalls neuadd y dref guilds gild (historical, ecological) guilds urdd (in association titles etc) guillemot gwylog guillemots gwylog guillotine gilotîn guillotine shears gwellaif gilotîn guillotines gilotîn guilt euogrwydd guilts euogrwydd guitar gitâr guitarist gitarydd guitarists gitarydd guitars gitâr gulch ceunant gulches ceunant gulf gwlff gulfs gwlff gullet gwddf (of saw) gullet llwnc gullets gwddf (of saw) gullets llwnc gullied gylïog gully gyli gum deintgig (holding teeth) gum gwm (=glue) gum gymio gum arabic gwm arabig gum arabics gwm arabig gum eraser dilëwr gwm gum erasers dilëwr gwm gum paper papur gwm gum papers papur gwm gum shield tarian geg gum shields tarian geg gummed gymedig gummed binding rhwymyn gwm gummed bindings rhwymyn gwm gummed tape tâp glud gummed tapes tâp glud gun gwn gunmetal gwnfetel gunmetals gwnfetel gunpowder powdr gwn gunpowders powdr gwn gunshot wound clwyf ergyd gwn gunshot wounds clwyf ergyd gwn gunwale gynwal gunwales gynwal gurmukhi gurmukhi gurmukhis gurmukhi guru gwrw (general usage) gurus gwrw (general usage) gush out ffrydio gusset cwysed gussets cwysed gust hwrdd gustation blasu gustatory hair blewyn blasu gustatory hairs blewyn blasu gusts hwrdd gut coludd gut fret cribell goludd gut frets cribell goludd gut string tant coludd gut strings tant coludd guttate ymddafnu guttation ymddafniad guttations ymddafniad gutter cafn (on roof) gutter cwter (in street) gutters cafn (on roof) gutters cwter (in street) guyot mynydd guyot guyots mynydd guyot gybe starn ogam gybe starn ogamu gybes starn ogam gymnasium campfa gymnasiums campfa gymnast gymnastwr gymnastic action gweithred gymnastig gymnastic actions gweithred gymnastig gymnastic activity gweithgaredd gymnastig gymnastics gymnasteg gymnasts gymnastwr gymnosperm gymnosberm gymnosperms gymnosberm gymnospore gymnosbor gymnospores gymnosbor gynaecium gynaeciwm gynaeciums gynaeciwm gynaecologist gynaecolegydd gynaecologists gynaecolegydd gynaecology gynaecoleg gynoecium gynoeciwm gynoeciums gynoeciwm gypsum gypswm gypsum plaster plastr gypswm gypsum plasters plastr gypswm gypsums gypswm gypsy sipsi gyration chwyrliant gyrations chwyrliant gyre cylchgerrynt gyres cylchgerrynt gyro compass cwmpawd gyro gyroscope gyrosgop gyroscopes gyrosgop haberdashery manion gwnïo habit abid (=dress) habit arfer (=custom) habitable trigiadwy habitat cynefin habitation annedd habitations annedd habitats cynefin habits abid (=dress) habits arfer (=custom) habitual abortion erthylu cyson hack hacio hacksaw haclif hacksaw blade llafn haclif hacksaw blades llafn haclif hacksaw frame ffrâm haclif hacksaw frames ffrâm haclif hacksaws haclif haematite haematit haematite iron haearn haematit haematite irons haearn haematit haematites haematit haematitic haematitig haematologist haematolegydd haematologists haematolegydd haematology haematoleg haematuria haematwria haematurias haematwria haemocoel ceudod gwaed haemocoels ceudod gwaed haemocyanin haemocyanin haemocyanins haemocyanin haemocytometer haemocytomedr haemocytometers haemocytomedr haemoglobin haemoglobin haemoglobins haemoglobin haemolysis haemolysis haemophilia haemoffilia haemophilias haemoffilia haemoptysis gwaedboer haemorrhage gwaedlif haemorrhages gwaedlif haff morlyn haffs morlyn hafnium haffniwm (Hf) hafniums haffniwm (Hf) hagiography buchedd sant hair blewyn (on body) hair gwallt (on head) hair canvas cynfas rhawn hair cell cell flewyn hair cells cell flewyn hair follicle ffoligl blewyn hair follicles ffoligl blewyn hair shirt rhawnbais hair shirts rhawnbais hairdryer sychwr gwallt hairdryers sychwr gwallt hairs blewyn (on body) halberd gwayw fwyell halberds gwayw fwyell half hanner half arch hanner bwa half arches hanner bwa half cell hanner cell half cells hanner cell half centre hanner canol half centres hanner canol half close diweddeb amherffaith half closes diweddeb amherffaith half court line llinell hanner cwrt half court lines llinell hanner cwrt half knees bend gliniau'n blyg i'r hanner half moon hanner lleuad half moon chisel cŷn hanner crwn half moon chisels cŷn hanner crwn half moon stake bonyn hanner crwn half moon stakes bonyn hanner crwn half moons hanner lleuad half rotary-cut veneer argaen toriad hanner cylchdro half rotary-cut veneers argaen toriad hanner cylchdro half round hanner crwn half round chisel cŷn hanner crwn half round chisels cŷn hanner crwn half round file ffeil hanner crwn half round files ffeil hanner crwn half round moulding mowldin hanner crwn half round mouldings mowldin hanner crwn half round rasp rhathell hanner crwn half round rasps rhathell hanner crwn half round scraper sgrafell hanner crwn half round scrapers sgrafell hanner crwn half rounds hanner crwn half section hanner trychiad half sections hanner trychiad half size hanner maint llawn half sizes hanner maint llawn half time hanner amser half times hanner amser half turn hanner tro half turns hanner tro half value period cyfnod hanner actifedd half value periods cyfnod hanner actifedd half-adder hanner adydd half-adders hanner adydd half-back hanerwr (male) half-back hanerwraig (female) half-backs hanerwr (male) half-backs hanerwraig (female) half-bound hanner rhwym half-day hanner diwrnod half-drop pattern patrwm hanner disgyn half-drop patterns patrwm hanner disgyn half-duplex hanner dwplecs half-duplexes hanner dwplecs half-kneeling penlinio un glin half-lap joint goruniad hanerog half-lap joints goruniad hanerog half-length hanner hyd half-length portrait portread hanner hyd half-length portraits portread hanner hyd half-lengths hanner hyd half-life hanner oes half-lifes hanner oes half-mask hanner masg half-masks hanner masg half-recessed join uniad hanner cilannog half-recessed joins uniad hanner cilannog half-ripping hanner rhwygo half-sectional hanner trychiadol half-sectional elevation golwg hanner trychiadol half-sectional elevations golwg hanner trychiadol half-sectional end elevation ochrolwg hanner trychiadol half-sectional end elevations ochrolwg hanner trychiadol half-sectional front elevation blaenolwg hanner trychiadol half-sectional front elevations blaenolwg hanner trychiadol half-sectional plan uwcholwg hanner trychiadol half-sectional plans uwcholwg hanner trychiadol half-sectional side elevation ochrolwg hanner trychiadol half-sectional side elevations ochrolwg hanner trychiadol half-sectional view golwg hanner trychiadol half-sectional views golwg hanner trychiadol half-space key bysell hanner bwlch half-term hanner tymor half-terms hanner tymor half-timber trawst bras wedi'i haneru half-timbers trawst bras wedi'i haneru half-tone hanner tôn half-tones hanner tôn half-volley hanner foli half-wave hanner ton half-wave rectified power supply cyflenwad pŵer gydag unioniad hanner ton half-wave rectifier meter mesurydd unioni hanner ton half-wave rectifier meters mesurydd unioni hanner ton half-waves hanner ton halfs hanner halfway line llinell hanner halfway lines llinell hanner halide halid halides halid halitosis halitosis hall mark nod gwarant hall marks nod gwarant hallmote halmwd hallmotes halmwd hallucinate gweld rhithiau hallucination rhithweledigaeth hallucinations rhithweledigaeth halo eurgylch (of saint) halo lleugylch (of moon) halogen halogen halogenated halogenaidd halogenation halogeniad halogenations halogeniad halogeno-compound cyfansoddyn halogenaidd halogeno-compounds cyfansoddyn halogenaidd halogenoalkane halogenoalcan halogenoalkanes halogenoalcan halogens halogen halophobe haloffob halophobes haloffob halophyte haloffyt halophytes haloffyt halophytic haloffytig halt atal halt ataliad halter neck gwddf tennyn halter necks gwddf tennyn halter top top tennyn halter tops top tennyn halts ataliad halve haneru halving joint uniad haneru halving joints uniad haneru hamlet pentrefan hamlets pentrefan hammer morthwyl hammer morthwylio hammer beam trawst gordd hammer beam roof to trawst gordd hammer beam roofs to trawst gordd hammer beams trawst gordd hammer drill dril morthwyl hammer drills dril morthwyl hammer handle coes morthwyl hammer handles coes morthwyl hammer mark marc morthwyl hammer marks marc morthwyl hammer part rhan morthwyl hammer parts rhan morthwyl hammer stone carreg forthwylio hammer stones carreg forthwylio hammer-head tenon tyno pen morthwyl hammer-head tenons tyno pen morthwyl hammers morthwyl hand llaw hand axe bwyell law hand axes bwyell law hand ball pêl law hand balls pêl law hand basin basn ymolchi hand basins basn ymolchi hand cards cardiau gwlân hand drawn lettering llythrennu â llaw hand drill dril llaw hand drills dril llaw hand embroidery brodwaith llaw hand file ffeil law hand files ffeil law hand flat file ffeil law fflat hand flat files ffeil law fflat hand hot gwres llaw (water) hand jam clo llaw hand jams clo llaw hand lens chwyddwydr hand loom gwŷdd llaw hand looms gwŷdd llaw hand machine peiriant llaw hand machines peiriant llaw hand made o waith llaw hand made buttonhole twll botwm llaw hand made buttonholes twll botwm llaw hand off hwp llaw hand offs hwp llaw hand organ organ law hand organs organ law hand painting paentiad llaw (of painted picture) hand painting peintio llaw (of process or art) hand paintings paentiad llaw (of painted picture) hand puppet pyped llaw hand puppets pyped llaw hand rail canllaw hand rails canllaw hand reamer agorell law hand reamers agorell law hand saw llawlif hand saws llawlif hand scraper sgrafell law hand scrapers sgrafell law hand screw sgriw law hand screws sgriw law hand sketch braslun llaw hand sketches braslun llaw hand taper tapr llaw hand tapers tapr llaw hand tools offer llaw hand vice feis law hand vices feis law hand walking llaw gerdded hand washable golchadwy â llaw hand wrench tyndro llaw hand wrenches tyndro llaw hand-breadth dyrnfedd (=4 inches) hand-breadths dyrnfedd (=4 inches) hand-eye coordination cydsymud llaw a llygad hand-held cup anemometer anemomedr llaw hand-held cup anemometers anemomedr llaw hand-in serfiwr (=server) hand-ins serfiwr (=server) hand-operated gweithredu â llaw hand-out dalen hysbysebu hand-outs dalen hysbysebu hand-shaking ysgwyd llaw handbag bag llaw handbags bag llaw handbill hysbyslen fach handbills hysbyslen fach handbook llawlyfr handbooks llawlyfr handicap anfantais handicapped child plentyn dan anfantais handicapped childs plentyn dan anfantais handicaps anfantais handicraft gwaith llaw handicrafts gwaith llaw handkerchief hances handkerchiefs hances handle carn (of knife, screwdriver etc) handle coes (of bat, brush, hammer, saucepan etc) handle dolen (of jug, cup etc) handle trafod (data, goods, ball etc) handle cane gwialen ddolen handle canes gwialen ddolen handle head pen coes handle heads pen coes handle the ball llawio'r bêl (when it's an offence) handles carn (of knife, screwdriver etc) handles coes (of bat, brush, hammer, saucepan etc) handles dolen (of jug, cup etc) handling llawio (of ball in sport) handling triniaeth (=treatment) handling ymdriniaeth (=discussion) handlings triniaeth (=treatment) handlings ymdriniaeth (=discussion) handlist llawrestr handlists llawrestr handout taflen handouts taflen hands llaw hands across seren (in dancing) hands four cylch pedwar hands fours cylch pedwar hands three cylch tri pedwar hands threes cylch tri pedwar hands! llaw! (in sport) hands-on ymarferol handset set law handsets set law handsign arwydd llaw (for pitch) handsigns arwydd llaw (for pitch) handspring sbring llaw handsprings sbring llaw handstand llawsafiad handstand llawsefyll handstands llawsafiad handwork gwaith llaw handworks gwaith llaw handwriting llawysgrifen handwritings llawysgrifen hang crogi (a person etc) hang hongian hanger cambren (for hanging clothes) hanger hongiwr (of tapestry etc) hangers cambren (for hanging clothes) hangers hongiwr (of tapestry etc) hanging crog hanging bowl powlen grog hanging bowls powlen grog hanging carcass sgerbwd crog hanging end pen crog hanging ends pen crog hanging garden gardd grog hanging gardens gardd grog hanging indent mewnoliad crog hanging indents mewnoliad crog hanging loop dolen grog hanging loops dolen grog hanging paragraph paragraff crog hanging paragraphs paragraff crog hanging stile cledren hongian hanging stiles cledren hongian hanging valley crognant hanging wall crogfur hanging walls crogfur hank twysgen hanks twysgen haploid haploid haploidy haploidi harbour harbwr harbours harbwr hard caled hard copy copi caled hard cover clawr caled hard covers clawr caled hard disk disg caled hard disks disg caled hard flooring llawr caled hard floorings llawr caled hard landscaping tirlunio caled hard news newyddion caled hard return dychweliad caled hard returns dychweliad caled hard rock craig galed hard rocks craig galed hard sectored sectoriad caled hard sectoreds sectoriad caled hard silver solder sodr arian caled hard silver solders sodr arian caled hard soap sebon caled hard soaps sebon caled hard solder sodr caled hard solders sodr caled hard water dŵr caled hard waters dŵr caled hard wired gwifredig hardboard caledfwrdd hardboard plane plaen caledfwrdd hardboard planes plaen caledfwrdd hardboards caledfwrdd hardcore craidd caled hardcores craidd caled harden caledu hardener caledwr hardeners caledwr hardening and tempering caledu a thymheru hardening hammer morthwyl caledu hardening hammers morthwyl caledu hardening material defnydd caledu hardening materials defnydd caledu hardie cŷn eingion hardie hole twll offer hardie holes twll offer hardies cŷn eingion hardiest tree coeden wytnaf hardiest trees coeden wytnaf hardiness gwydnwch hardness caledwch hardness of water caledwch dŵr hardness scale graddfa galedwch hardness scales graddfa galedwch hardness test prawf caledwch hardness tests prawf caledwch hardpan cletir hardpans cletir hardware caledwedd (of computers) hardware shop siop nwyddau metel hardware shops siop nwyddau metel hardwares caledwedd (of computers) hardwearing yn gwisgo'n dda hardwood pren caled hardwood cell cell pren caled hardwood cells cell pren caled hardwood fillet ffiled pren caled hardwood fillets ffiled pren caled hardwood mallet gordd pren caled hardwood mallets gordd pren caled hardwood wedging lletemu pren caled hardwoods pren caled haricot beans ffa haricot harmattan harmatan harmattans harmatan harmful niweidiol harmful bacteria bacteria niweidiol harmonic harmonig harmonic chromatic scale graddfa gromatig harmonig harmonic chromatic scales graddfa gromatig harmonig harmonic colour lliw harmonig harmonic colours lliw harmonig harmonic interval cyfwng harmonig harmonic intervals cyfwng harmonig harmonic mean cymedr harmonig harmonic means cymedr harmonig harmonic minor scale graddfa leiaf harmonig harmonic minor scales graddfa leiaf harmonig harmonic motion mudiant harmonig harmonic motions mudiant harmonig harmonic movement rhediad harmonig harmonic movements rhediad harmonig harmonic proportion cyfrannedd harmonig harmonic proportions cyfrannedd harmonig harmonic sequence dilyniant harmonig harmonic sequences dilyniant harmonig harmonic series cyfres harmonig harmonica harmonica harmonicas harmonica harmonics harmonig harmonious cydseiniol harmonious colour lliw cydnaws harmonious colours lliw cydnaws harmonium harmoniwm harmonium player harmonydd harmonium players harmonydd harmoniums harmoniwm harmonize harmoneiddio harmony cytgord (figurative sense) harmony harmoni (in music) harp telyn harp stop stop telyn harp stops stop telyn harpist telynor (male) harpist telynores (female) harpists telynor (male) harpists telynores (female) harps telyn harpsichord harpsicord harpsichords harpsicord harvest cynhaeaf harvest moon lleuad fedi harvest moons lleuad fedi harvest service cyfarfod diolchgarwch harvest services cyfarfod diolchgarwch harvest thanksgiving diolch am y cynhaeaf harvests cynhaeaf hash stwnsh (in general) hash table tabl stwnsh hash tables tabl stwnsh hash total cyfanswm stwnsh hash totals cyfanswm stwnsh hashed random file organization trefn hap-ffeil stwnshlyd hashed random file organizations trefn hap-ffeil stwnshlyd hashing stwnsio hashing algorithm algorithm stwnsio hashing algorithms algorithm stwnsio hashs stwnsh (in general) hasp and staple hasb a stwffwl hatch agoriad gweini (for serving) hatch deor (of egg) hatch lliniogi (=mark with lines) hatchery deorfa hatches agoriad gweini (for serving) hatchet bwyell hatchet bit haearn sodro bwyell hatchet bits haearn sodro bwyell hatchet stake bonyn ongl lem hatchet stakes bonyn ongl lem hatchets bwyell hauberk llurig hauberks llurig haulage cludiant haulage contractor cludwr nwyddau haulage contractors cludwr nwyddau haulages cludiant haulier halier hauliers halier haunch hansio haunched mortise and tenon mortais a thyno hansiedig haunched mortise and tenon joint uniad mortais a thyno hansiedig haunched mortise and tenon joints uniad mortais a thyno hansiedig haunched tenon tyno hansiedig haunched tenons tyno hansiedig haustorium hawstoriwm haustoriums hawstoriwm haven hafan havens hafan hawking heboga hawthorn draenen wen hawthorns draenen wen hay infusion trwyth gwair hay infusions trwyth gwair haybote perthfudd haybotes perthfudd hayward caegeidwad haywards caegeidwad hazard perygl hazardous substance sylwedd peryglus hazardous substances sylwedd peryglus hazards perygl haze tawch (atmospheric pollution etc) hazes tawch (atmospheric pollution etc) head pen (in general) head wynebyn (in geology) head boy prif fachgen head girl prif ferch head girls prif ferch head injury anaf i'r pen head motif motiff pen head motifs motiff pen head movement symudiad y pen head movements symudiad y pen head of department pennaeth adran head of faculty pennaeth cyfadran head of lower school pennaeth yr ysgol isaf head of middle school pennaeth yr ysgol ganol head of navigation terfyn mordwyo head of subject pennaeth pwnc head of upper school pennaeth yr ysgol uchaf head of year pennaeth blwyddyn head office prif swyddfa head offices prif swyddfa head register llais y pen head registers llais y pen head the ball penio'r bêl head voice llais y pen head voices llais y pen head wall recession enciliad cefnfur head wall recessions enciliad cefnfur head wear gwisg pen head wears gwisg pen head-on ben-ben headache cur pen headaches cur pen header peniad (of ball) header tape blaen-dâp header tapes blaen-dâp headers peniad (of ball) heading pennawd headings pennawd headland pentir headlands pentir headline pennawd headlines pennawd headmaster prifathro headmasters prifathro headmistress prifathrawes headphone ffôn pen headphones ffôn pen headquarters pencadlys heads pen (in general) heads wynebyn (in geology) headslide penlithryn headslides penlithryn headspring sbring pen headsprings sbring pen headstand pensafiad headstand pensefyll headstands pensafiad headstock pen byw (of lathe) headstock centre canol tro headstock centres canol tro headstocks pen byw (of lathe) headteacher pennaeth ysgol headteachers pennaeth ysgol headward erosion blaen erydu headwater blaenddwr headwaters blaenddwr headword prif air headwords prif air heal gwella health iechyd health and fitness officer swyddog iechyd a ffitrwydd health and fitness officers swyddog iechyd a ffitrwydd health and safety iechyd a diogelwch health and safety legislation deddfwriaeth iechyd a diogelwch health and safety legislations deddfwriaeth iechyd a diogelwch health and safety officer swyddog iechyd a diogelwch health and safety officers swyddog iechyd a diogelwch health and social care iechyd a gofal cymdeithasol health and social care setting sefyllfa iechyd a gofal cymdeithasol health and social care settings sefyllfa iechyd a gofal cymdeithasol health and social cares iechyd a gofal cymdeithasol health authority awdurdod iechyd health care assistant cynorthwyydd gofal iechyd health care assistants cynorthwyydd gofal iechyd health care provider darparwr gofal iechyd health care providers darparwr gofal iechyd health care purchaser prynwr gofal iechyd health care purchasers prynwr gofal iechyd health care support worker gweithiwr cynnal gofal iechyd health care support workers gweithiwr cynnal gofal iechyd health care system cyfundrefn gofal iechyd health care systems cyfundrefn gofal iechyd health centre canolfan iechyd health centres canolfan iechyd health club clwb iechyd health clubs clwb iechyd health education addysg iechyd health education authority awdurdod addysg iechyd health educations addysg iechyd health improvement gwella iechyd health improvement plan cynllun gwella iechyd health improvement plans cynllun gwella iechyd health index mynegai iechyd health indexes mynegai iechyd health maintenance cynnal iechyd health promotion hybu iechyd health promotion activity gweithgaredd hybu iechyd health promotion campaign ymgyrch hybu iechyd health promotion campaigns ymgyrch hybu iechyd health promotion material deunydd hybu iechyd health promotion materials deunydd hybu iechyd health risk perygl iechyd health risks perygl iechyd health screening sgrinio iechyd health service gwasanaeth iechyd health services gwasanaeth iechyd health status statws iechyd health team tîm iechyd health teams tîm iechyd health visitor ymwelydd iechyd health visitors ymwelydd iechyd health-related exercise ymarfer cysylltiedig ag iechyd health-related exercises ymarfer cysylltiedig ag iechyd healths iechyd healthy iach healthy diet deiet iachus healthy diets deiet iachus healthy lifestyle ffordd iach o fyw healthy lifestyles ffordd iach o fyw healthy plate plât o fwyd iachus healthy plates plât o fwyd iachus hearing clyw (=ability to hear) hearing gwrandawiad (of a case) hearing aid teclyn clywed hearing aids teclyn clywed hearing loss colli clyw hearings clyw (=ability to hear) hearings gwrandawiad (of a case) heart calon heart attack trawiad ar y galon heart attacks trawiad ar y galon heart disease clefyd y galon heart diseases clefyd y galon heart failure methiant y galon heart failures methiant y galon heart murmur murmur y galon heart murmurs murmur y galon heart rate cyfradd curiad y galon heart rate training zone cylchfa ymarfer cyfradd curiad y galon heart rate training zones cylchfa ymarfer cyfradd curiad y galon heart rates cyfradd curiad y galon heart shake hollt calon heart shakes hollt calon heart sounds synau'r galon heartbeat curiad calon heartbeats curiad calon hearth aelwyd hearth body corff yr aelwyd hearth tax treth aelwyd hearth taxes treth aelwyd hearth trowel trywel aelwyd hearth trowels trywel aelwyd hearths aelwyd heartland perfeddwlad heartlands perfeddwlad hearts calon heartwood rhuddin heartwoods rhuddin heat gwres (=condition of being hot) heat gwresogi heat rhagras (=preliminary race) heat and energy foods bwydydd gwres ac egni heat capacity cynhwysedd gwres heat haze tes heat hazes tes heat of combustion gwres hylosgi heat of formation gwres ffurfio heat of neutralisation gwres niwtralu heat of reaction gwres adweithio heat of vaporization gwres anweddu heat resistant gwrthiannol i wres heat sink suddfan gwres heat sinks suddfan gwres heat treatment triniaeth wres heat treatments triniaeth wres heat-resisting varnish farnais gwrth-wres heat-resisting varnishs farnais gwrth-wres heater gwresogydd heater circuit cylched wresogi heater circuits cylched wresogi heater current cerrynt gwresogi heater currents cerrynt gwresogi heaters gwresogydd heath rhos heathland rhostir heathlands rhostir heaths rhos heating element elfen wresogi heating elements elfen wresogi heats gwres (=condition of being hot) heats rhagras (=preliminary race) heatstroke trawiad gwres heatstrokes trawiad gwres heatwave ton wres heatwaves ton wres heave gwthiad (in geological fault) heave haliad (of rope) heave halio (a rope) heave ymgodi (on a bar) heave ymgodiad (on a bar) heave hanging hongian halio heave swing swing ymhalio heave swings swing ymhalio heaven nefoedd (in religious sense) heavenly body corff wybrennol heavens nefoedd (in religious sense) heavens wybren (=sky) heaves gwthiad (in geological fault) heaves haliad (of rope) heaves ymgodiad (on a bar) heavy trwm heavy colour lliw trwm heavy colours lliw trwm heavy damping gwanychiad trwm heavy dampings gwanychiad trwm heavy duty detergent glanedydd cryf heavy duty detergents glanedydd cryf heavy duty drilling machine peiriant drilio gwaith trwm heavy duty drilling machines peiriant drilio gwaith trwm heavy impasto impasto trwm heavy industry diwydiant trwm heavy metal metel trwm heavy metals metel trwm heavy oil olew trwchus heavy oils olew trwchus heavy water dŵr trwm heavy waters dŵr trwm heavy weight pwysau trwm hectare hectar hectares hectar heddle brwyd heddles brwyd hedge perth hedges perth hedonic calculus calcwlws hedonig hedonic relevance perthnasedd hedonig hedonic relevances perthnasedd hedonig heel sawdl heel sodli heel and toe step step sawdl a bawd heel and toe steps step sawdl a bawd heel clearance cliriad sawdl heel clearances cliriad sawdl heel of a bow sawdl bwa heel of glove sawdl y faneg heelball cwyr rhwbio heelballs cwyr rhwbio heels sawdl hegemony penarglwyddiaeth height taldra (of person) height uchder (=elevation) height / time graph graff uchder / amser height / time graphs graff uchder / amser height adjusting nut nyten gymhwyso uchder height adjusting nuts nyten gymhwyso uchder height gauge medrydd uchder height gauges medrydd uchder heights taldra (of person) heights uchder (=elevation) heights are to the nearest metre above mean sea level uchderau i'r metr agosaf uwchlaw lefel y môr cymedrig heir etifedd heir apparent edling heir apparents edling heir presumptive etifedd tebygol heir presumptives etifedd tebygol heirs etifedd helical heligol helical flute ffliwt heligol helical flutes ffliwt heligol helical path llwybr heligol helical paths llwybr heligol helical spring sbring heligol helical springs sbring heligol helical thread edau heligol helical threads edau heligol helicoid helicoid helicoidal helicoidol helicoids helicoid helicopter hofrennydd helicopters hofrennydd heliotropic heliotropig heliotropism heliotropedd heliotropisms heliotropedd heliport maes hofrenyddion heliports maes hofrenyddion helium heliwm (He) heliums heliwm (He) helix helics helix angle ongl helics helix angles ongl helics helix clearance cliriad helics helix clearances cliriad helics helixes helics hell uffern hells uffern helm roof to helm helm roofs to helm helmet helm helmets helm helmsman llywiwr helmsmans llywiwr help cymorth helplessness diymadferthedd helps cymorth hem hem hem hemio hem allowance lwfans hem hem allowances lwfans hem hem depth lled hem hem depths lled hem hem finish gorffeniad hem hem finishs gorffeniad hem hem line llinell hem hem lines llinell hem hem marker marciwr hem hem markers marciwr hem hem stitch pwyth hemio hem stitches pwyth hemio hem stitching hembwytho hemicellulose hemicellwlos hemicelluloses hemicellwlos hemiparesis lled-barlys un ochr hemiplegia parlys un ochr hemiplegias parlys un ochr hemisphere hemisffer hemispheres hemisffer hemispherical bowl bowlen hemisffer hemispherical bowls bowlen hemisffer hemispherical shell cragen hemisffer hemispherical shells cragen hemisffer hemmer hemell (machine attachment) hemmers hemell (machine attachment) hemp cywarch hemp twine cortyn cywarch hemp twines cortyn cywarch hemps cywarch henge cylch pridd henges cylch pridd henotheism henotheistiaeth henotheisms henotheistiaeth hepatic portal vein gwythïen bortal hepatig hepatic portal veins gwythïen bortal hepatig hepatic vein gwythïen hepatig hepatic veins gwythïen hepatig hepatitis hepatitis heptagon heptagon heptagonal heptagonal heptagons heptagon herald herodr heraldic herodrol heraldic banner lluman herodrol heraldic banners lluman herodrol heraldic bard arwyddfardd heraldic bards arwyddfardd heraldic colour lliw herodrol heraldic colours lliw herodrol heraldic lettering llythrennu herodrol heraldic purse pwrs herodrol heraldic purses pwrs herodrol heraldry herodraeth heralds herodr herb llysieuyn herbaceous llysieuol herbal llysieulyfr (book) herbals llysieulyfr (book) herbarium herbariwm herbariums herbariwm herbicide chwynladdwr herbicides chwynladdwr herbivore llysysydd herbivores llysysydd herbivorous llysysol herbs llysieuyn herd buches (of dairy cows) herd gyr (of cattle) herd immunity imiwnedd poblogaeth herds buches (of dairy cows) herds gyr (of cattle) hereditament etifeddiant hereditaments etifeddiant hereditary etifeddol hereditary fief ffiff etifeddol hereditary fiefs ffiff etifeddol hereditary monarchy brenhiniaeth etifeddol heredity etifeddeg heresy heresi heretic heretic heretical hereticaidd heretics heretic heriot ebediw heriots ebediw heritage etifeddiaeth heritages etifeddiaeth hermaphrodite deurywiad hermaphrodites deurywiad hermaphroditic deurywiol hermaphroditism deurywiaeth hermaphroditisms deurywiaeth hermetically sealed cwbl seliedig hermit meudwy hermitage cell meudwy hermitages cell meudwy hermits meudwy hero arwr heroic society cymdeithas arwrol herpes herpes herring bone strut cynheiliad saethben herring bone struts cynheiliad saethben herring-bone banding bandin saethben herring-bone bandings bandin saethben herring-bone pattern patrwm saethben herring-bone patterns patrwm saethben herring-bone stitch pwyth saethben herring-bone stitches pwyth saethben herring-bone weave gwehyddiad saethben herring-bone weaves gwehyddiad saethben hertz herts (Hz) hertzes herts (Hz) hessian hesian hessians hesian heterodyne heterodein heterodynes heterodein heterogametic heterogametaidd heterogeneity heterogenedd heterogeneous heterogenaidd heterolytic fission ymholltiad heterolytig heterolytic fissions ymholltiad heterolytig heterophony heteroffoni heterosexual heterorywiol heterosporous heterosboraidd heterospory heterosboredd heterostyly heterostyledd heterotroph heterotroff heterotrophs heterotroff heterozygous heterosygaidd heuristic hewristig heuristic play chwarae hewristig heuristic program rhaglen hewristig heuristic programs rhaglen hewristig heuristic proof prawf hewristig heuristic proofs prawf hewristig hex hecs hex digit digid hecs hex digits digid hecs hexacyanoferrate ion ïon hecsacyanofferad hexacyanoferrate ions ïon hecsacyanofferad hexadecimal hecsadegol hexadecimal counting system system rifo hecsadegol hexadecimal counting systems system rifo hecsadegol hexadecimal notation nodiant hecsadegol hexadecimal notations nodiant hecsadegol hexagon hecsagon hexagonal hecsagonol hexagonal close-packing pacio tyn hecsagonol hexagonal head bolt bollt ben hecsagonol hexagonal head bolts bollt ben hecsagonol hexagonal head screw sgriw ben hecsagonol hexagonal head screws sgriw ben hecsagonol hexagonal nut nyten hecsagonol hexagonal nuts nyten hecsagonol hexagonal prism prism hecsagonol hexagonal prisms prism hecsagonol hexagonal pyramid pyramid hecsagonol hexagonal pyramids pyramid hecsagonol hexagonal section material defnydd trychiad hecsagonol hexagonal section materials defnydd trychiad hecsagonol hexagons hecsagon hexahedron hecsahedron hexahedrons hecsahedron hexose hecsos hexoses hecsos hey hai hey between hai traws hey betweens hai traws hey with your own hai unrhyw hi-tech technoleg uwch hi-teches technoleg uwch hiatus bwlch hibernate gaeafgysgu hibernation gaeafgwsg hibernations gaeafgwsg hiccup igian hidden cudd hidden costs costau cudd hidden curriculum cwricwlwm cudd hidden curriculums cwricwlwm cudd hidden detail manylion cudd hidden detail line llinell manylion cudd hidden detail lines llinell manylion cudd hidden eighth wythfed cudd hidden eighths wythfed cudd hidden fifth pumed cudd hidden fifths pumed cudd hidden instrument offeryn cudd hidden instruments offeryn cudd hidden line llinell gudd hidden lines llinell gudd hide croen (=skin) hide cuddio hide mallet gordd ledr hide mallets gordd ledr hide picture cuddio llun hides croen (=skin) hierarchical hierarchaidd hierarchical database cronfa ddata hierarchaidd hierarchical databases cronfa ddata hierarchaidd hierarchical model model hierarchaidd hierarchical models model hierarchaidd hierarchical organisational structure fframwaith rheoli hierarchaidd hierarchical organisational structures fframwaith rheoli hierarchaidd hierarchy hierarchaeth hierarchy of needs hierarchaeth anghenion hierarchy of the courts hierarchaeth y llysoedd hieroglyphic writing ysgrifen hieroglyffig hieroglyphic writings ysgrifen hieroglyffig high uchel high Renaissance uchel Ddadeni high altar prif allor high altars prif allor high ball pêl uchel high balls pêl uchel high carbon steel dur carbon uchel high carbon steels dur carbon uchel high chair cadair uchel high clarinet uwchglarinét high clarinets uwchglarinét high class area ardal dosbarth uchaf high class areas ardal dosbarth uchaf high density building adeiladu clos high dive deifio'n uchel high fidelity cywair-bur high foaming detergent glanedydd llawndrochion high foaming detergents glanedydd llawndrochion high forward roll rhôl uchel ymlaen high forward rolls rhôl uchel ymlaen high frequency amledd uchel (of oscillations) high frequency induction furnace ffwrnais anwytho amledd uchel high frequency induction furnaces ffwrnais anwytho amledd uchel high jump naid uchel high jumps naid uchel high level lefel uchel high levels lefel uchel high limit terfan uchel high limits terfan uchel high line llinell uchel high lines llinell uchel high neck gwddf uchel high necks gwddf uchel high place uchelfa high places uchelfa high population density dwysedd poblogaeth uchel high pressure gwasgedd uchel high pressure system system gwasgedd uchel high pressure systems system gwasgedd uchel high pressures gwasgedd uchel high register nodau uchel high relief cerfwedd uchel (=alto relievo) high reliefs cerfwedd uchel (=alto relievo) high sales gwerthiant mawr high sea cefnfor high seas cefnfor high spin amlsbin high standard safon uchel high standards safon uchel high street bank banc stryd fawr high street banks banc stryd fawr high tensile uchel dynnol high tensile steel dur ucheldynnol high tensile steels dur ucheldynnol high tide llanw uchel high tides llanw uchel high treason uchel frad high treasons uchel frad high vacuum gwactod eithaf high vacuums gwactod eithaf high voltage foltedd uchel high voltages foltedd uchel high water penllanw high water mark marc penllanw high water marks marc penllanw high waters penllanw high-level language iaith lefel uchel high-level languages iaith lefel uchel high-level programming language iaith raglennu lefel uchaf high-level programming languages iaith raglennu lefel uchaf high-order uwch-werth high-speed bit ebill cyflym iawn high-speed bits ebill cyflym iawn high-speed drill dril cyflym iawn high-speed drills dril cyflym iawn highboard llwyfan uchel highboards llwyfan uchel higher uwch higher clergy uwch glerigwyr higher degree gradd uwch higher degrees gradd uwch higher education addysg uwch higher educations addysg uwch higher order polynomial equation uwch-hafaliad polynomaidd higher order polynomial equations uwch-hafaliad polynomaidd highest common factor ffactor gyffredin fwyaf highest common factors ffactor gyffredin fwyaf highest point pwynt uchaf highest points pwynt uchaf highland ucheldir highlands ucheldir highlight amlygu (=bring into prominence) highlight goleubwyntio (in art) highlight lliwddangos (=mark with a highlighter) highlight uchafbwynt highlight bar bar amlygu highlight bars bar amlygu highlighting goleubwyntio (in art) highlights uchafbwynt highly skilled tra medrus highly specialised tra arbenigol highway priffordd highwayman lleidr pen-ffordd highwaymans lleidr pen-ffordd hijack herwgipio hill bryn hill country bryndir hill fog niwl mynydd hill fogs niwl mynydd hill fort bryngaer hill forts bryngaer hill shading arlliwio llethrau hill station brynfa hill stations brynfa hillock bryncyn hillocks bryncyn hills bryn hilly bryniog hilt carn hilts carn hilum hadgraith hilums hadgraith hind brain ôl-ymennydd hind brains ôl-ymennydd hind gut ôl-berfeddyn hind guts ôl-berfeddyn hind leg coes ôl hind legs coes ôl hind-milk armel hind-milks armel hinge colfach hinge colfachu hinge bracket braced colfach hinge brackets braced colfach hinge knuckle cymal colfach hinge knuckles cymal colfach hinge leaf dalen golfach hinge leafs dalen golfach hinge pin pìn colfach hinge pins pìn colfach hinge-bound clofach-glwm hinged colfachog hinged arm braich golfachog hinged arms braich golfachog hinges colfach hinterland cefnwlad hinterlands cefnwlad hip clun hip carry cario wrth glun hip joint cymal y glun hip joints cymal y glun hip line llinell glun hip lines llinell glun hip measurement mesuriad clun hip measurements mesuriad clun hip rafter ceibr talcen hip rafters ceibr talcen hip roof talcendo hip roof rafter cwpl talcen hip roof rafters cwpl talcen hip roofs talcendo hire llogi hire-purchase hurbwrcas hire-purchase hurbwrcasu hire-purchases hurbwrcas hirsute blewog histidine histidin histidines histidin histogram histogram histograms histogram histology histoleg histone histon histones histon histopathology histopatholeg historian hanesydd historians hanesydd historical hanesyddol historical data data hanesyddol historical feature nodwedd hanesyddol historical features nodwedd hanesyddol historical method dull yr hanesydd historical methods dull yr hanesydd historical period cyfnod hanesyddol historical periods cyfnod hanesyddol historical perspective persbectif hanesyddol historical perspectives persbectif hanesyddol historical source ffynhonnell hanesyddol historical sources ffynhonnell hanesyddol historical theme thema hanesyddol historical themes thema hanesyddol historical topic topig hanesyddol historical topics topig hanesyddol historicism hanesiaeth historicisms hanesiaeth historicity hanesoldeb historiographer hanesydd (=historian) historiographer hanesyddiaethwr (=authority on historiography) historiographers hanesydd (=historian) historiographers hanesyddiaethwr (=authority on historiography) historiography hanesyddiaeth history hanes hit ergyd (=a stroke with a bat) hit ergydio (=strike with a bat) hit taro (=reach a target) hit trawiad (in general) hit a boundary taro chwech (for six runs) hit a boundary taro pedwar (for four runs) hit back taro nôl hit back trawiad nôl hit backs trawiad nôl hit for six taro chwech hit rate cyfradd taro hit rates cyfradd taro hit the ball twice taro'r bêl eilwaith hit the target taro'r targed hit wicket taro'r wiced hit-out ergyd ochr hit-outs ergyd ochr hitch clymu hoar frost barrug hoar frosts barrug hoard celc hoarding oriel bren (castle) hoardings oriel bren (castle) hoards celc hob pentan hobby hobi hockey hoci hodograph hodograff hodographs hodograff hogback hopgefn hogbacks hopgefn hoghair brush brwsh blew mochyn hoghair brushs brwsh blew mochyn hoist codi hoist teclyn codi hoists teclyn codi hold charges cadw'r un prisiau mynediad holder daliwr holders daliwr holdfast dalbren (=clamp) holdfast gludafael (of algae) holdfasts dalbren (=clamp) holdfasts gludafael (of algae) holding daliad (of land, shares etc) holding device dyfais ddal holding devices dyfais ddal holding hands cydio dwylo holding power pwerddaliad (nails and screws) holding powers pwerddaliad (nails and screws) holding tools offer gafael holding washer wasier gynnal holding washers wasier gynnal holdings daliad (of land, shares etc) hole twll hole in the heart twll yn y galon hole saw llif dwll hole saws llif dwll holes twll holiday brochure taflen wyliau holiday brochures taflen wyliau holiday camp gwersyll gwyliau holiday camps gwersyll gwyliau holiday centre canolfan wyliau holiday centres canolfan wyliau holiday insurance yswiriant gwyliau holiday insurances yswiriant gwyliau holiday village pentref gwyliau holiday villages pentref gwyliau holidays gwyliau holistic cyfannol holistic model model cyfannol holistic models model cyfannol hollow cafnu hollow gwag hollow pant hollow pantio hollow back somersault trosben ceugefn hollow back somersaults trosben ceugefn hollow bit tongs gefel gegron hollow head pen cau hollow heads pen cau hollow mandrel mandrel cau (lathe) hollow mandrels mandrel cau (lathe) hollow moulding mowldin cau hollow mouldings mowldin cau hollow plane plaen cafnu hollow planes plaen cafnu hollow saddle key allwedd gyfrwy cau hollow set set gau hollow sets set gau hollow square bit tongs gefel gegsgwar hollow tree coeden gau hollow trees coeden gau hollow ware ceunwyddau hollowing cafnu hollowing block bloc cafnu hollowing blocks bloc cafnu hollowing hammer morthwyl cafnu hollowing hammers morthwyl cafnu hollows pant holmium holmiwm (Ho) holmiums holmiwm (Ho) holocaust holocost holocausts holocost holomorphic holomorffig holophytic holoffytig holozoic holosöig holy sanctaidd holy book llyfr bendigaid holy books llyfr bendigaid holy communion cymun bendigaid holy communions cymun bendigaid holy day dydd gŵyl homage gwrogaeth homages gwrogaeth home cartref home hafanu home army byddin gartref home background cefndir cartref home backgrounds cefndir cartref home computer market marchnad y cyfrifiaduron cartref home computer markets marchnad y cyfrifiaduron cartref home cured bacon cig moch cartref home cured bacons cig moch cartref home economics economeg y cartref home economist economegydd cartref home economists economegydd cartref home education addysg gartref home educations addysg gartref home farm fferm y plas home farms fferm y plas home front ffrynt cartref home fronts ffrynt cartref home help cymorth cartref (service) home help cynorthwyydd cartref (person) home help organizer trefnydd cymorth cartref home help organizers trefnydd cymorth cartref home helps cymorth cartref (service) home helps cynorthwyydd cartref (person) home key cywair gwreiddiol (of musical notes) home market marchnad gartref home markets marchnad gartref home ownership perchentyaeth home ownerships perchentyaeth home page tudalen gartref home pages tudalen gartref home rule ymreolaeth home ruler ymreolwr home rulers ymreolwr home rules ymreolaeth home run rhediad adref home runs rhediad adref home shopping siopa o'r cartref home tonic tonydd cysefin home tonics tonydd cysefin home visit ymweliad cartref home visits ymweliad cartref home worker gweithiwr cartref home workers gweithiwr cartref home-made goods nwyddau cartref homegrown timber coed cartref homegrown vegetables llysiau cartref homeland mamwlad homelands mamwlad homeless digartref homelessness bod yn ddigartref homeopathy homeopathi homeostasis homeostasis homeostatic mechanism mecanwaith homeostatig homeostatic mechanisms mecanwaith homeostatig homeothermic homeothermig homes cartref homespun brethyn cartref homespuns brethyn cartref homestead tyddyn homesteads tyddyn homework gwaith cartref homeworks gwaith cartref homily homili homocyclic homoseiclig homogeneity homogenedd homogeneous homogenaidd homography homograffeg homologous homologaidd homologous series cyfres homologaidd homologue homolog homologues homolog homology homoleg homolytic fission ymholltiad homolytig homolytic fissions ymholltiad homolytig homomorphic homomorffig homomorphism homomorffedd homomorphisms homomorffedd homophonic homoffonig homosporous homosboraidd homothetic homothetig homozygous homosygaidd hone carreg hogi hone hogi hone hôn hones carreg hogi hones hôn honest competition cystadlu gonest honey guide dynodyn mêl honey guides dynodyn mêl honeycomb diliau mêl honeycomb smocking smocwaith crwybr honeycomb smockings smocwaith crwybr honeycomb stitch pwyth crwybr honeycomb stitches pwyth crwybr honeycombed crwybrog honeycombed door drws crwybr gwenyn honeycombed doors drws crwybr gwenyn honeycombing crwybro honeysuckle pattern patrwm gwyddfid honeysuckle patterns patrwm gwyddfid honing guide tywyswr hogi honing guides tywyswr hogi honorary degree gradd er anrhydedd honorary degrees gradd er anrhydedd honour anrhydedd (in general) honour anrhydeddu (in general) honour arglwyddiaeth freiniol (feudal) honours anrhydedd (in general) honours arglwyddiaeth freiniol (feudal) honours degree gradd anrhydedd honours degrees gradd anrhydedd hood cwfl (on garment) hood lwfer (above fire etc) hoods cwfl (on garment) hoods lwfer (above fire etc) hoof foot troed garn hoof foots troed garn hook bach (of implement) hook bachiad (=act of hooking) hook bachu hook gwrach (=harp peg) hook and bolt bach a bollt hook and eye bach a llygad hook shot bachiad hook shots bachiad hook wrench tyndro bach hook wrenches tyndro bach hooked spit tafod bachog hooked spits tafod bachog hooker bachwr (in rugby) hookers bachwr (in rugby) hooks bach (of implement) hooks bachiad (=act of hooking) hooks gwrach (=harp peg) hooliganism hwliganiaeth hooliganisms hwliganiaeth hoop cylch hoop cylchu (a wheel) hooper daliwr hoopers daliwr hoops cylch hop herc hop hercian hopeless anobeithiol hopper hopran hoppers hopran hops hopys hopsack hopsac hopsacks hopsac horde llu hordes llu horizon gorwel horizon line llinell orwel horizon lines llinell orwel horizons gorwel horizontal llorwedd horizontal llorweddol horizontal astride vault llofnaid hir ar led horizontal astride vaults llofnaid hir ar led horizontal axis echelin lorweddol horizontal bar bar llorweddol horizontal bars bar llorweddol horizontal boring borio llorweddol horizontal branch pipe peipen gangen lorweddol horizontal branch pipes peipen gangen lorweddol horizontal buttonhole twll botwm llorweddol horizontal buttonholes twll botwm llorweddol horizontal centring canoli llorweddol horizontal chiselling naddu llorweddol horizontal control rheolaeth lorweddol horizontal controls rheolaeth lorweddol horizontal equivalent cywerth llorwedd horizontal equivalents cywerth llorwedd horizontal force grym llorweddol horizontal forces grym llorweddol horizontal grouping grwpio llorweddol horizontal integration integreiddio llorweddol horizontal kneeling penlinio llorweddol horizontal line llinell lorweddol horizontal lines llinell lorweddol horizontal milling machine peiriant melino llorwedd horizontal milling machines peiriant melino llorwedd horizontal paring naddu llorweddol horizontal plane plân llorweddol (H.P.) horizontal planes plân llorweddol (H.P.) horizontal pug mill melin gleio lorweddol horizontal pug mills melin gleio lorweddol horizontal range cyrhaeddiad llorweddol horizontal ranges cyrhaeddiad llorweddol horizontal relationship perthynas lorweddol horizontal relationships perthynas lorweddol horizontal scale graddfa lorweddol horizontal scales graddfa lorweddol horizontal section trychiad llorweddol horizontal sections trychiad llorweddol horizontal stripe rhes lorweddol horizontal stripes rhes lorweddol horizontal through vault llofnaid fwlch hir horizontal through vaults llofnaid fwlch hir horizontal traces olinau llorweddol horizontality llorwedd-dra horizontals llorwedd hormonal hormonaidd hormone hormon hormones hormon horn corn horn passage caniad y cyrn horn passages caniad y cyrn horn player canwr corn horn players canwr corn hornbook llyfr corn hornbooks llyfr corn hornpipe cornddawns (dance) hornpipe pibgorn (instrument) hornpipes cornddawns (dance) hornpipes pibgorn (instrument) horns corn horny texture gwead cornaidd horny textures gwead cornaidd horoscope horosgop horoscopes horosgop horror arswyd horrors arswyd horse ceffyl (of animal) horse hors (for airing clothes) horse latitudes lledredau'r meirch horse with pommels ceffyl â chorfau horsepower marchnerth horsepowers marchnerth horses ceffyl (of animal) horses hors (for airing clothes) horseshoe pedol ceffyl horseshoe arch bwa pedol horseshoe arches bwa pedol horseshoe magnet magnet pedol horseshoe magnets magnet pedol horseshoes pedol ceffyl horst horst horsts horst hose pipe peipen ddŵr rwber hose pipes peipen ddŵr rwber hosiery hosanwaith hospice hosbis hospices hosbis hospital ysbyty hospital play specialist arbenigwr chwarae ysbyty hospital play specialists arbenigwr chwarae ysbyty hospitalize anfon i'r ysbyty hospitals ysbyty host gwesteiwr (of person or computer) host gwestywr (at hotel) host organeb letyol (organism) host cell cell letyol host cells cell letyol hostage gwystl hostages gwystl hostel hostel hostels hostel hosts gwesteiwr (of person or computer) hosts gwestywr (at hotel) hosts organeb letyol (organism) hot gorgynnes (in metalworking) hot poeth hot blast chwythiad gorgynnes hot blasts chwythiad gorgynnes hot colour lliw gorgynnes (in metalworking) hot colours lliw gorgynnes (in metalworking) hot cross bun picen y Grog hot cross buns picen y Grog hot dip galvanizing galfanu dip poeth hot dipping dipio poeth hot iron haearn poeth hot irons haearn poeth hot metal metel gorgynnes (in metalworking) hot metals metel gorgynnes (in metalworking) hot sand tywod gorgynnes hot sands tywod gorgynnes hot set set boeth hot sets set boeth hot shortness poeth freuder hot spot man poeth hot spots man poeth hot spring tarddell boeth hot springs tarddell boeth hot strip mill melin strip boeth hot strip mills melin strip boeth hot water dye llifyn dŵr poeth hot water dyes llifyn dŵr poeth hot water starch startsh dŵr poeth hot water starches startsh dŵr poeth hot wire gwifren boeth hot wires gwifren boeth hot-housing gorysgogi (=overstimulation) hotbed magwrfa hotbeds magwrfa hotel gwesty hotel chain cadwyn o westai hotel chains cadwyn o westai hotel management rheolaeth gwesty hotel managements rheolaeth gwesty hotels gwesty hotness poethder hour awr hour angle ongl awr hour angles ongl awr hourly rate tâl yn ôl yr awr hourly rates tâl yn ôl yr awr hours awr hours of labour oriau o lafur house tŷ house church eglwys dŷ house churches eglwys dŷ house contents policy polisi cynnwys y tŷ house officer meddyg tŷ house officers meddyg tŷ house price pris tŷ house prices pris tŷ house to let tŷ ar osod housebote anheddfudd housebotes anheddfudd housebound caeth i'r tŷ housecraft crefft cadw tŷ housecrafts crefft cadw tŷ housed shelf silff rigolog housed shelfs silff rigolog houseflies clêr household cartref (=home) household gosgordd (=retinue) household tŷ (=a house and its affairs) household goods nwyddau tŷ household linen llieiniau tŷ household soap sebon golchi household soaps sebon golchi householder deiliad y tŷ householders deiliad y tŷ households cartref (=home) households gosgordd (=retinue) households tŷ (=a house and its affairs) housekeeping cadw tŷ housekeeping allowance lwfans cadw tŷ housekeeping allowances lwfans cadw tŷ housemaid morwyn tŷ housemaids morwyn tŷ houses tŷ housewife gwraig tŷ housewifery crefft cadw tŷ housewifes gwraig tŷ housing rhigol (for track, joint) housing tai (in general) housing action area ardal weithredu ar dai housing action areas ardal weithredu ar dai housing association cymdeithas tai housing associations cymdeithas tai housing benefit budd-dal tai housing benefit supplement atodiad budd-dal tai housing benefit supplements atodiad budd-dal tai housing benefits budd-dal tai housing circlip cylchglip mewn rhigol housing circlips cylchglip mewn rhigol housing department adran dai housing departments adran dai housing estate stad o dai housing estates stad o dai housing joint uniad rhigol draws housing joints uniad rhigol draws housing problems problemau cartrefu housing provision darparu tai housing subsidy cymhorthdal tai housings rhigol (for track, joint) hovercraft hofrenfad hovercrafts hofrenfad how's that? howsat? hub both hue arlliw hue and cry gwaedd ac ymlid hug cofleidio hug the ball cofleidio'r bêl hug the knees cofleidio'r pengliniau hulk llong garchar (=prison ship) hulks llong garchar (=prison ship) hull corff llong hulls corff llong hum tas galch (in geography) human bod dynol human dynol human activity gweithgarwch dynol human behaviour ymddygiad dynol human behaviours ymddygiad dynol human body corff dynol human capital cyfalaf dynol human capitals cyfalaf dynol human character cymeriad dynol human characters cymeriad dynol human computer interface rhyngwyneb dynol y cyfrifiadur human computer interfaces rhyngwyneb dynol y cyfrifiadur human development datblygiad dynol human developments datblygiad dynol human digestive system system dreulio ddynol human digestive systems system dreulio ddynol human environment amgylchedd dynol human environments amgylchedd dynol human features nodweddion dynol human figure ffigur dynol human figures ffigur dynol human form ffurf ddynol human forms ffurf ddynol human genetics geneteg dyn human geography daearyddiaeth ddynol human processes prosesau dynol human resource planning cynllunio adnoddau dynol human resources adnoddau dynol human resources function swyddogaeth adnoddau dynol human resources functions swyddogaeth adnoddau dynol human resources manager rheolwr adnoddau dynol human resources managers rheolwr adnoddau dynol human rights iawnderau dynol humanisitic art celfyddyd ddyneiddiol humanisitic arts celfyddyd ddyneiddiol humanism dyneiddiaeth humanisms dyneiddiaeth humanist dyneiddiwr humanistic dyneiddiol humanistic education addysg ddyneiddiol humanistic educations addysg ddyneiddiol humanists dyneiddiwr humanitarian dyngarol humanitarian dyngarwr humanitarianism dyngarwch humanitarianisms dyngarwch humanitarians dyngarwr humanities dyniaethau humanity dynoliaeth humans bod dynol humerus hwmerws humid llaith humidification lleithiad humidifications lleithiad humidifier lleithydd humidifiers lleithydd humidity lleithder humification llufadredd humifications llufadredd humiliation cywilydd humiliations cywilydd hummock ponc hummocks ponc hummocky ponciog humus hwmws hundred cant (=100) hundred cantref (=administrative area) hundred court llys y cantref hundred courts llys y cantref hundred metres can metr hundred metres race ras gan metr hundred metres races ras gan metr hundred square sgwâr cant hundred squares sgwâr cant hundreds cant (=100) hundreds cantref (=administrative area) hundredth canfed hundredths canfed hunter heliwr hunter's moon lleuad hela hunter's moons lleuad hela hunter-gatherer heliwr-gasglwr hunter-gatherers heliwr-gasglwr hunters heliwr hurdle clwyd hurdle race ras glwydi hurdle races ras glwydi hurdler clwydwr hurdlers clwydwr hurdles clwyd hurricane corwynt hurricanes corwynt husbandry hwsmonaeth husk plisgyn husks plisgyn hussar hwsâr hussars hwsâr hustings hysting hyaline cartilage cartilag hyalin hyaline cartilages cartilag hyalin hyaluronic acid asid hyalwronig hyaluronic acids asid hyalwronig hybrid croesryw hybrid vigour ymnerth croesryw hybrid vigours ymnerth croesryw hybridisation croesrywedd hybridisations croesrywedd hybrids croesryw hydathode hydathod hydathodes hydathod hydrate hydrad hydrate hydradu hydrated hydradol hydrates hydrad hydration hydradiad hydrations hydradiad hydraulic hydrolig hydraulic lift lifft hydrolig hydraulic lifts lifft hydrolig hydraulic organ chwythorgan ddŵr hydraulic organs chwythorgan ddŵr hydraulic press gwasgydd hydrolig hydraulics hydroleg hydride hydrid hydrides hydrid hydrocarbon hydrocarbon hydrocarbon fuel tanwydd hydrocarbon hydrocarbon fuels tanwydd hydrocarbon hydrocarbons hydrocarbon hydrocephalic hydroceffalig hydrochloric acid asid hydroclorig hydrochloric acids asid hydroclorig hydrodynamics hydrodynameg hydroelectric trydan dŵr hydroelectric power pŵer trydan dŵr hydroelectric powers pŵer trydan dŵr hydroelectrics trydan dŵr hydrofoil hydroffoil hydrofoils hydroffoil hydrogen hydrogen (H) hydrogen acceptor derbynnydd hydrogen hydrogen acceptors derbynnydd hydrogen hydrogen peroxide hydrogen perocsid hydrogen peroxides hydrogen perocsid hydrogenate hydrogenu hydrogenated hydrogenaidd hydrogenation hydrogeniad hydrogenations hydrogeniad hydrogenize hydrogenu hydrogens hydrogen (H) hydrograph hydrograff hydrographs hydrograff hydrography hydrograffeg hydrolapse cwymp gwlithbwynt hydrolapses cwymp gwlithbwynt hydrological cycle cylchred hydrolegol hydrological cycles cylchred hydrolegol hydrology hydroleg hydrolyse hydrolysu hydrolysis hydrolysis hydrometer hydromedr hydrometers hydromedr hydrophilic hydroffilig hydrophobic hydroffobig hydrophobics hydroffobig hydropool hydrobwll hydropools hydrobwll hydroscopic hydrosgopig hydrosphere hydrosffer hydrospheres hydrosffer hydrostatic hydrostatig hydrostatics hydrostateg hydrothermal hydrothermol hydrotropism hydrotropedd hydrotropisms hydrotropedd hydroxide hydrocsid hydroxides hydrocsid hydroxyethanoic acid asid hydrocsiethanöig hydroxyethanoic acids asid hydrocsiethanöig hydroxyproline hydrocsiprolin hydroxyprolines hydrocsiprolin hyetograph hyetograff hyetographs hyetograff hygiene hylendid hygienes hylendid hygienic hylan hygrogram hygrogram hygrograms hygrogram hygrometer hygromedr hygrometers hygromedr hygroscopic hygrosgopig hymn emyn hymn tune emyn-dôn hymn tunes emyn-dôn hymns emyn hypabyssal rock craig hypabysol hypabyssal rocks craig hypabysol hyper major gorfwyaf hyper majors gorfwyaf hyperactive child plentyn gorfywiog hyperactive childs plentyn gorfywiog hyperactivity gorfywiogrwydd hyperbola hyperbola hyperbolas hyperbola hyperbole gormodiaith hyperboles gormodiaith hyperbolic hyperbolig hyperbolic function ffwythiant hyperbolig hyperbolic functions ffwythiant hyperbolig hyperboloid hyperboloid hyperboloids hyperboloid hypergeometric hypergeometrig hyperinflation gorchwyddiant hyperinflations gorchwyddiant hypermarket archfarchnad hypermarkets archfarchnad hypermedia hypergyfryngau hyperplasia gordyfiant hyperplasias gordyfiant hypertension gorbwysedd (blood pressure) hypertensions gorbwysedd (blood pressure) hypertext hyperdestun hypertext knowledge gwybodaeth hyperdestun hypertext knowledges gwybodaeth hyperdestun hypertext link cyswllt hyperdestun hypertext links cyswllt hyperdestun hypertext mark-up language iaith farcio hyperdestun hypertext mark-up languages iaith farcio hyperdestun hypertexts hyperdestun hypertonic hypertonig hypertrochoid hypertrocoid hypertrochoids hypertrocoid hypertrophy hypertroffedd hyperventilation goranadlu hypha hyffa hyphal hyffaidd hyphas hyffa hyphen cysylltnod hyphenation exception eithriad cysylltnodi hyphenation exceptions eithriad cysylltnodi hyphens cysylltnod hypochlorite bleach cannydd hypoclorit hypochlorite bleaches cannydd hypoclorit hypocycloid hypocylchoid hypocycloids hypocylchoid hypodermal hypodermaidd hypodermic tangroenol hypodermic needle theory damcaniaeth nodwydd hypodermig hypogeal tanddaearol hypoglossal isdafodol hypomode modd deilliedig hypomodes modd deilliedig hyposecretion hyposecretiad hyposecretions hyposecretiad hypotension isbwysedd hypotensions isbwysedd hypotenuse hypotenws hypotenuses hypotenws hypothalamus hypothalamws hypothermia hypothermia hypothermias hypothermia hypothesis rhagdybiaeth hypothesis test prawf rhagdybiaeth hypothesis testing profi rhagdybiaethau hypothesis tests prawf rhagdybiaeth hypotonic to hypotonig i hypsography hypsograffeg hypsometer hypsomedr hypsometers hypsomedr hypsometric hypsometrig hysteresis hysteresis hysteria hysteria hysterias hysteria iambic dyrchafedig iambus corfan dyrchafedig ice iâ ice axe caib eira ice axes caib eira ice barrier bar iâ ice barriers bar iâ ice bound rhewgaeth ice cap cap iâ ice caps cap iâ ice cold wind rhewynt ice cold winds rhewynt ice dam argae iâ ice dams argae iâ ice edge ymyl iâ ice edges ymyl iâ ice fall rhewgwymp ice falls rhewgwymp ice floe ffloch iâ ice floes ffloch iâ ice fog niwl iâ ice fogs niwl iâ ice front ffrynt iâ ice fronts ffrynt iâ ice jam tagfa iâ ice jams tagfa iâ ice lobe llabed iâ ice lobes llabed iâ ice marginal channel sianel iâ ymylol ice marginal channels sianel iâ ymylol ice peg peg iâ ice pegs peg iâ ice shattered rhewddrylliog ice sheet llen iâ ice sheets llen iâ ice shelf sgafell iâ ice shelfs sgafell iâ ice wedge lletem iâ ice wedges lletem iâ iceberg mynydd iâ icebergs mynydd iâ icicle pibonwyen icicles pibonwyen icon eicon iconic eiconig iconic representation portread eiconig iconic representations portread eiconig iconic thinking meddwl eiconig iconoclasm delwddrylliad iconoclasms delwddrylliad iconoclast delwddrylliwr iconoclastic delwddrylliol iconoclasts delwddrylliwr iconographic eiconograffig iconography eiconograffeg iconography and practice eiconograffeg ac ymarfer icons eicon icosahedron icosahedron icosahedrons icosahedron icy cold rhewllyd idea syniad ideal delfryd (in general) ideal delfrydol (in general) ideal ideal (in mathematics) ideal perffaith (in physics) ideal gas nwy delfrydol idealism delfrydiaeth (in general) idealisms delfrydiaeth (in general) idealist delfrydwr idealists delfrydwr idealization delfrydiad idealizations delfrydiad ideals delfryd (in general) ideals ideal (in mathematics) ideas syniad idemfactor idemffactor idemfactors idemffactor idempotent idempotent identical unfath identical twin gefell unfath identical twins gefell unfath identifiable canfyddadwy identification adnabyddiaeth identification uniaethu (with someone) identifications adnabyddiaeth identified need angen canfyddadwy identified needs angen canfyddadwy identifier dynodwr identifiers dynodwr identify adnabod (=establish the identity of, recognize) identify canfod (by analysis of the circumstances) identify nodi (=note) identify the specimen enwi'r sbesimen identifying needs adnabod anghenion identity hunaniaeth (=personality) identity unfathiant (=absolute sameness) identity band band adnabod identity bands band adnabod identity card cerdyn adnabod identity cards cerdyn adnabod identity element elfen unfathiant identity elements elfen unfathiant ideogram ideogram ideograms ideogram ideologue ideolegwr ideologues ideolegwr ideology ideoleg idle resources adnoddau segur idle return stroke strôc ddychwel segur idle return strokes strôc ddychwel segur idle rich cyfoethogion segur idler wheels olwynion cyswllt idling speed cyflymder segura idling speeds cyflymder segura idol eilun idolatry eilunaddoliaeth idols eilun igloo iglw igneous igneaidd igneous rock craig igneaidd igneous rocks craig igneaidd ignite cynnau ignition taniad ignition system system danio ignition systems system danio ignitions taniad ignorance anwybodaeth ignorances anwybodaeth ignore anwybyddu ignore character nod anwybyddu ignore characters nod anwybyddu ileum ilewm ileums ilewm iliac iliag iliac artery rhydweli iliag iliac vein gwythïen iliag iliac veins gwythïen iliag iliolumbar artery rhydweli iliolymbar ilium iliwm iliums iliwm illegal anghyfreithlon illegal character nod anghyfreithlon illegal characters nod anghyfreithlon illegality anghyfreithlondeb illegitimate anghyfreithlon illiteracy anllythrennedd illiterate anllythrennog illness afiechyd illness behaviour ymddygiad afiechyd illness behaviours ymddygiad afiechyd illuminant goleuydd illuminants goleuydd illuminate goleuo (=light up) illuminate goliwio (=decorate a manuscript) illuminated goliwiedig (of manuscript) illuminated lettering llythrennu goliwiedig illuminated manuscript llawysgrif oliwiedig illuminated manuscripts llawysgrif oliwiedig illuminated script sgript oliwiedig illuminated scripts sgript oliwiedig illuminating power goleunerth illuminating powers goleunerth illumination golau (=light) illumination goliwiad (of manuscript) illumination factor ffactor goleuo illumination factors ffactor goleuo illuminations golau (=light) illuminations goliwiad (of manuscript) illuminism ilwminiaeth illuminisms ilwminiaeth illuminist ilwminydd illuminists ilwminydd illusion rhith illusionism rhithiolaeth illusionisms rhithiolaeth illusions rhith illustrate darlunio (with a drawing) illustrate egluro (=explain or make clear) illustrate enghreifftio (with an example) illustrated darluniadol (with drawings) illustrated eglurhaol (with examples) illustration darlun (=picture) illustration darlun eglurhaol (=drawing or picture illustrating a book etc) illustration darluniad (=act or instance of illustrating) illustration enghraifft (=example) illustrations darlun (=picture) illustrations darlun eglurhaol (=drawing or picture illustrating a book etc) illustrations darluniad (=act or instance of illustrating) illustrations enghraifft (=example) illustrative darluniadol (=containing drawing or pictures) illustrative enghreifftiol (serving as an explanation or example) illuvial mewnlifol illuviation mewnlif illuviations mewnlif image delw (=idol) image delwedd (=representation, idea) image analysis dadansoddi delweddau image manipulation trin delweddau image processing prosesu delweddau imagery delweddaeth images delw (=idol) images delwedd (=representation, idea) imaginary dychmygol imaginary background cefndir dychmygol imaginary backgrounds cefndir dychmygol imaginary part rhan ddychmygol imaginary parts rhan ddychmygol imaginary world byd dychmygol imaginary worlds byd dychmygol imagination dychymyg imaginations dychymyg imaginative llawn dychymyg imaginative composition cyfansoddiad llawn dychymyg imaginative compositions cyfansoddiad llawn dychymyg imaginative play chwarae llawn dychymyg imbalance anghydbwysedd imbalances anghydbwysedd imbecile ynfytyn imbeciles ynfytyn imbecility ynfydrwydd imbed plannu imbricated structure adeiledd gorwthiad imbricated structures adeiledd gorwthiad imitate dynwared imitation dynwarediad imitations dynwarediad imitative dynwaredol imitative learning dysgu drwy ddynwared imitative play chwarae efelychol immature anaeddfed immature soil pridd anaeddfed immature soils pridd anaeddfed immediacy digyfryngedd immediate access store storfa uniongyrchol immediate access stores storfa uniongyrchol immediate operand operand uniongyrchol immediate operands operand uniongyrchol immerse trochi immersion trochiad immersion heater gwresogydd troch immersion heaters gwresogydd troch immersion programme rhaglen drochi immersion programmes rhaglen drochi immersions trochiad immigrant mewnfudwr immigrant education addysg mewnfudwyr immigrant educations addysg mewnfudwyr immigrant labour llafur estron immigrant labours llafur estron immigrants mewnfudwr immigrate mewnfudo immigration mewnfudiad immigrations mewnfudiad immiscible anghymysgadwy immobilised enzyme ensym ansymudol immobilised enzymes ensym ansymudol immobility ansymudoledd immoral anfoesol immorality anfoesoldeb immortality anfarwoldeb immunal suppression ataliad imiwnedd immunal suppressions ataliad imiwnedd immune imiwn immune reaction adwaith imiwn immune reactions adwaith imiwn immunisation programme rhaglen imiwneiddio immunisation programmes rhaglen imiwneiddio immunity imiwnedd immunization imiwneiddiad immunizations imiwneiddiad immunize imiwneiddio immunologist imiwnolegydd immunologists imiwnolegydd immunology imiwnoleg immunosuppression atal imiwnedd impact ardrawiad (=firm press) impact effaith (=effect or influence) impact adhesive adlyn ardrawol impact adhesives adlyn ardrawol impact glue glud ardrawol impact glues glud ardrawol impact printer argraffydd traw impact printers argraffydd traw impact resistance gwrthiant ardrawiad impact resistances gwrthiant ardrawiad impact sound sŵn gwrthdaro impact sounds sŵn gwrthdaro impact strength nerth ardrawiad impact strengths nerth ardrawiad impacted cywasgedig impacts ardrawiad (=firm press) impacts effaith (=effect or influence) impair amharu ar impaired diffygiol impairment nam impairments nam impasto impasto impeach uchelgyhuddo impeachment uchelgyhuddiad impeachments uchelgyhuddiad impedance rhwystriant impedances rhwystriant impede rhwystro impediment nam impediments nam impeller pwlsadur (pulsator) impellers pwlsadur (pulsator) imperfect cadence diweddeb amherffaith imperfect cadences diweddeb amherffaith imperfect competition cystadleuaeth amherffaith imperfect competitions cystadleuaeth amherffaith imperfection amherffeithrwydd imperfections amherffeithrwydd imperial imperial (measure) imperial imperialaidd (of expansionist aims) imperial ymerodrol (of empire) imperial history hanes yr ymerodraeth imperialism imperialaeth imperialisms imperialaeth imperialist imperialydd imperialists imperialydd impermeable anathraidd impermeable membrane pilen anathraidd impermeable membranes pilen anathraidd impersonal amhersonol impervious anhydraidd impetus ysgogiad impinge ardaro implant mewnblaniad implant mewnblannu implant a cell in the placenta mewnblannu cell yn y brych implantation mewnblannu implants mewnblaniad implement gweithredu implementation gweithred (in mathematics) implementations gweithred (in mathematics) implication goblygiad implication of trend goblygiad y duedd implications goblygiad implicit ymhlyg implicit function ffwythiant ymhlyg implicit functions ffwythiant ymhlyg implied ymhlyg implied terms telerau dealledig implosion mewnffrwydrad implosions mewnffrwydrad imply ymhlygu impolder polderu import mewnforio import mewnforyn import duty toll mewnforio import replacement amnewid mewnforion import tariff toll mewnforio import tariffs toll mewnforio imported timber coed sy'n cael eu mewnforio importer mewnforiwr importers mewnforiwr imports mewnforyn impose gosod impost treth imposts treth impound powndio impoverish tlodi impoverishment tlodi impoverishments tlodi impregnate ffrwythloni (in biology) impregnate trwytho (=saturate) impregnated wadding wadin trwythedig impregnated waddings wadin trwythedig impregnation ffrwythloniad (in biology) impregnation trwythiad (=saturation) impregnations ffrwythloniad (in biology) impregnations trwythiad (=saturation) impresario impresario impression argraff impressionable argraffadwy impressionism argraffiadaeth impressionisms argraffiadaeth impressionist argraffiadydd impressionistic argraffiadol impressionists argraffiadydd impressions argraff impressive nodedig impressment gorfodaeth impressments gorfodaeth imprimatur imprimatur imprimatura imprimatura imprimaturas imprimatura imprimaturs imprimatur imprint gwasgnod (of knurling tool) imprints gwasgnod (of knurling tool) impromptu byrfyfyr impromptu impromptu impromptus impromptu improper afreolaidd improper fraction ffracsiwn pendrwm improper fractions ffracsiwn pendrwm impropriate amfeddu impropriate tithe degwm amfedd impropriate tithes degwm amfedd impropriation amfeddiad impropriations amfeddiad impropriator amfeddwr impropriators amfeddwr improve gwella improve performance gwella perfformiad improved land tir wedi ei wella improved lands tir wedi ei wella improved varieties gwell amrywogaethau improvement gwelliant improvement grant grant gwella improvement grants grant gwella improvements gwelliant improving the school grounds gwella tir yr ysgol improvisation creu'n fyrfyfyr improvise addasu byrfyfyr (=adapt) improvise chwarae'n fyrfyfyr (in music playing) improvised byrfyfyr improvised apparatus offer byrfyfyr improvised testing profi byrfyfyr impulse ergyd impulse symbyliad (=mental incitement) impulse ysgogiad (nervous) impulse buying prynu byrbwyll impulses ergyd impulses symbyliad (=mental incitement) impulses ysgogiad (nervous) impulsive ergydiol impulsive tension tensiwn ergydiol impulsive tensions tensiwn ergydiol impure amhur impurity amhuredd imputed cost cost briodoledig imputed costs cost briodoledig in care mewn gofal in good proportion mewn cyfrannedd da in her personal capacity dan ei henw ei hun in his personal capacity dan ei enw ei hun in parallax mewn paralacs in proportion mewn cyfrannedd in register mewn iawn luniad in reserve wrth gefn in sequence yn olynol in series mewn cyfres in the course of employment yng nghwrs cyflogaeth in the nude yn noethlymun in the proportion yn y gyfrannedd in the round yn dri dimensiwn in twos yn ddeuoedd in vitro in vitro in vitro fertilization ffrwythloni in vitro (IVF) in vivo in vivo in vogue mewn bri in-house mewnol in-line mewn llinell in-line point follower dilynwr pwynt mewn-llinell in-line point followers dilynwr pwynt mewn-llinell in-line production cynhyrchu mewn-llinell in-line roller rholer mewn-llinell in-line rollers rholer mewn-llinell in-patient claf mewnol in-patients claf mewnol in-range mewn amrediad in-service education addysg mewn swydd in-service educations addysg mewn swydd in-service training course cwrs hyfforddiant mewn swydd in-service training courses cwrs hyfforddiant mewn swydd inability anallu inaccessibility anhygyrchedd inaccessible anhygyrch inaccuracy anghywirdeb inaccurate gwallus inaccurate size maint gwallus inaccurate sizes maint gwallus inactivate anactifadu inactive anactif (in chemistry) inactivity anactifedd inadequate annigonol inanimate difywyd inappropriate clothing dillad anaddas inaudible anhyglyw inaugural agoriadol inaugural lecture darlith sefydlu inaugural lectures darlith sefydlu inaugural speech araith sefydlu inaugural speeches araith sefydlu inaugurate sefydlu inblowing wind gwynt mewnchwyth inblowing winds gwynt mewnchwyth inborn cynhenid inborn capacity gallu cynhenid inborn errors of metabolism gwallau cynhenid metabolaeth inbound i mewn (of flights, traffic etc) inbreed mewnfridio incandescence gwyniasedd incandescences gwyniasedd incandescent gwynias incandescent cloud cwmwl gwynias incandescent clouds cwmwl gwynias incantation swyngan incantations swyngan incarcerate carcharu incarnation ymgnawdoliad incarnations ymgnawdoliad incendiarism llosgyddiaeth incendiarisms llosgyddiaeth incendiary bom tân (bomb) incense arogldarth (sweet smelling gum or spice) incense cynhyrfu (=enrage) incenses arogldarth (sweet smelling gum or spice) incentive cymhelliad incentive travel teithio cymhellol incentives cymhelliad incentre mewnganol incentres mewnganol incest llosgach incests llosgach inch modfedd inches modfedd incidence nifer (of cases) incidence trawiad (in physics) incidence of rainfall dygwydd glawiad incidences nifer (of cases) incidences trawiad (in physics) incident digwyddiad (=occurrence) incident trawol (=striking) incident treth (feudal) incident radiation pelydriad trawol incident radiations pelydriad trawol incident ray pelydryn trawol incidents digwyddiad (=occurrence) incidents treth (feudal) incipient plasmolysis plasmolysis cychwynnol incircle mewngylch (inscribed circle) incircles mewngylch (inscribed circle) incise endorri incised alphabet gwyddor endoredig incised alphabets gwyddor endoredig incised carving cerfiad endorri incised carvings cerfiad endorri incised meander ystum rhychog incised meanders ystum rhychog incised moulding mowldin endoredig incised mouldings mowldin endoredig incised wound clwyf toriad incised wounds clwyf toriad incising knife cyllell endorri incising knifes cyllell endorri incision endoriad incisions endoriad incisor blaenddant incisors blaenddant incline goledd incline goleddu incline inclein (in a slate quarry) incline of difficulty goledd anhawster inclined ar oledd inclined face wyneb ar oledd inclined faces wyneb ar oledd inclined plane plân ar oledd inclined planes plân ar oledd inclined rope rhaff ar oledd inclined ropes rhaff ar oledd inclined solids solidau ar oledd inclines goledd inclines inclein (in a slate quarry) include cynnwys included angle ongl gynwysedig included angles ongl gynwysedig inclusion cynhwysiad inclusions cynhwysiad inclusive cynhwysol income incwm income elasticity elastigedd incwm income group grŵp incwm income groups grŵp incwm income support cymhorthdal incwm income supports cymhorthdal incwm income tax treth incwm income taxes treth incwm incomes incwm incommensurable anghymesur incompatible anghydnaws (of objects) incompatible anghymarus (of people) incompetence anghymwyster incompetence model model anallu incompetence models model anallu incompetences anghymwyster incomplete anghyflawn incomplete dominance trechedd anghyflawn incomplete dominances trechedd anghyflawn incomplete view golwg anghyflawn incomplete views golwg anghyflawn incompressible anghywasg inconsistency anghysondeb inconsistent anghyson incontinence anymataliaeth incontinences anymataliaeth incontinent anymataliol inconvenience anhwylustod inconveniences anhwylustod incorrect anghywir increase cynnydd increase cynyddu increase rate cyfradd cynnydd increase rates cyfradd cynnydd increase stitches cynyddu pwythau increases cynnydd increasing control rheolaeth gynyddol increasing controls rheolaeth gynyddol increasing cost cost gynyddol increasing costs cost gynyddol increasing fluency rhwyddineb cynyddol increasing sequence dilyniant cynyddol increasing sequences dilyniant cynyddol increment cynyddiad (in computing) incremental cynyddol increments cynyddiad (in computing) incrustation crameniad incrustations crameniad incrusted cramennog incubation period cyfnod deori (of egg) incubation period cyfnod magu (of disease) incubation periods cyfnod deori (of egg) incubation periods cyfnod magu (of disease) incubator crud cynnal (for babies) incubator deorydd (for eggs) incubators crud cynnal (for babies) incubators deorydd (for eggs) incumbency perigloriaeth incumbent deiliad (of any office) incumbent periglor (of ecclesiastical office) incumbents deiliad (of any office) incumbents periglor (of ecclesiastical office) incursion cipgyrch incursions cipgyrch incus eingion indathrene blue glas indathrin indathrene blues glas indathrin indebted dyledus indefinite amhendant indefinite integral integryn amhendant indefinite integrals integryn amhendant indefinite length hyd amhendant indefinite lengths hyd amhendant indehiscent anymagorol indelible ink inc parhaol indelible inks inc parhaol indemnify rhyddarbed indemnity digollediad (=compensation) indemnity indemniad (=protection or exemption) indent indeintio (legal documents) indent mewnoli (a margin) indent mewnoliad (of margin) indentation danheddiad (=toothlike notches) indentation indeintiad (of legal documents) indentation pantiad (=dent) indentations danheddiad (=toothlike notches) indentations indeintiad (of legal documents) indentations pantiad (=dent) indented danheddus (with toothlike notches) indented paragraph paragraff wedi'i fewnoli indented paragraphs paragraff wedi'i fewnoli indented text testun wedi'i fewnoli indented texts testun wedi'i fewnoli indents mewnoliad (of margin) indenture indeintur indentured labour llafur ymrwymedig indentured labours llafur ymrwymedig indentures indeintur independence annibyniaeth independences annibyniaeth independent annibynnol independent cwmni annibynnol (of television companies) independent assortment of genes rhydd-ddosraniad y genynnau independent chuck crafanc gafael annibynnol independent chucks crafanc gafael annibynnol independent gentry bonedd annibynnol independent learning dysgu annibynnol independent reading level lefel darllen annibynnol independent reading levels lefel darllen annibynnol independent school ysgol annibynnol independent schools ysgol annibynnol independent section adran annibynnol independent sections adran annibynnol independent shop siop annibynnol independent shops siop annibynnol independent study astudio annibynnol independent suspension hongiad annibynnol independent suspensions hongiad annibynnol independent university prifysgol annibynnol independent variable newidyn annibynnol independent variables newidyn annibynnol independently assorting rhydd-ddosrannol independents cwmni annibynnol (of television companies) indeterminacy amhenodrwydd indeterminate amhenderfynedig (in economics) indeterminate key cywair amhenodol index indecs (in mathematics and science) index mynegai (=alphabetical list with references) index mynegeio (list alphabetically with references) index finger mynegfys index fingers mynegfys index linked indecs gyswllt index mode modd mynegai index modes modd mynegai index notation nodiant indecs index notations nodiant indecs index number mynegrif index numbers mynegrif index of proportionality indecs cyfranoledd index pin pìn cyfeirio index pins pìn cyfeirio index register cofrestr mynegai index registers cofrestr mynegai indexed address cyfeiriad mynegedig indexed addressing cyfeirio mynegedig indexed sequential file ffeil ddilyniannol fynegedig indexed sequential files ffeil ddilyniannol fynegedig indexes indecs (in mathematics and science) indexes mynegai (=alphabetical list with references) indexical sign arwydd mynegeiol indexical signs arwydd mynegeiol indicate dangos indicate dynamics dangos dynameg indication arwydd indications arwydd indicator dangosydd indicator of abuse dangosydd camdriniaeth indicators dangosydd indict ditio indictable ditiadwy indictable offence trosedd dditiadwy indictable offences trosedd dditiadwy indictment ditiad indictments ditiad indifference curves cromliniau diwahaniaeth indiffusible anhryledadwy indigenous brodorol indigenous industry diwydiant brodorol indigestible anhydraul indigestion diffyg traul indigestions diffyg traul indirect anuniongyrchol indirect addressing cyfeirio anuniongyrchol indirect care gofal anuniongyrchol indirect carer gofalydd anuniongyrchol indirect carers gofalydd anuniongyrchol indirect cares gofal anuniongyrchol indirect contact cyswllt anuniongyrchol indirect contacts cyswllt anuniongyrchol indirect free kick cic rydd anuniongyrchol indirect free kicks cic rydd anuniongyrchol indirect lighting golau anuniongyrchol indirect lightings golau anuniongyrchol indirect tax treth anuniongyrchol indirect taxes treth anuniongyrchol indiscriminate diwahân indissoluble residue gwaddod annhoddadwy indissoluble residues gwaddod annhoddadwy indistinguishability anwahaniaethrwydd indium indiwm (In) indiums indiwm (In) individual unigol individual unigolyn individual activities gweithgareddau fel unigolyn (in sport) individual demand curve cromlin galw unigol individual demand curves cromlin galw unigol individual game gêm unigol individual games gêm unigol individual performance review adolygiad perfformiad unigol individual performance reviews adolygiad perfformiad unigol individual possession meddiant unigol individual possessions meddiant unigol individual test prawf unigol individual tests prawf unigol individual training and assessment programme rhaglen hyfforddi ac asesu unigol individual training and assessment programmes rhaglen hyfforddi ac asesu unigol individualism unigoliaeth individualisms unigoliaeth individualist unigolydd individualists unigolydd individualized education programme rhaglen addysg unigol individualized education programmes rhaglen addysg unigol individualized reading programme rhaglen ddarllen i'r unigolyn individualized reading programmes rhaglen ddarllen i'r unigolyn individuals unigolyn indivisibility anwahanadrwydd indivisible anwahanadwy indoctrinate cyflyru indol-3-yl-acetic acid asid indol-3-yl-asetig (IAA) indol-3-yl-acetic acids asid indol-3-yl-asetig (IAA) indole indol indole acetic acid asid indol asetig indole acetic acids asid indol asetig indole butyric acid asid indol bwtyrig (IBA) indole butyric acids asid indol bwtyrig (IBA) indoles indol indoor dan do indoor environment amgylchedd dan do indoor environments amgylchedd dan do indoor use defnydd dan do indoor uses defnydd dan do indoor work gwaith dan do indoor works gwaith dan do induce anwytho (in logic, physics etc) induce peri (=cause) induce prysuro (birth) induced anwythol induced charge gwefr anwythol induced charges gwefr anwythol induced fit ffit anwythol induced fits ffit anwythol induct sefydlu inductance anwythiant inductances anwythiant induction anwythiad (in logic, physics etc) induction sefydliad (of a person) induction coil coil anwythiad induction coils coil anwythiad induction course cwrs sefydlu induction courses cwrs sefydlu induction meeting cyfarfod sefydlu induction meetings cyfarfod sefydlu induction stroke strôc anwythiad induction strokes strôc anwythiad induction training hyfforddiant sefydlu induction trainings hyfforddiant sefydlu induction year blwyddyn sefydlu induction years blwyddyn sefydlu inductions anwythiad (in logic, physics etc) inductions sefydliad (of a person) inductive anwythol inductive proof prawf anwythol inductive proofs prawf anwythol inductive sensor synhwyrydd anwythol inductive sensors synhwyrydd anwythol inductor anwythydd inductors anwythydd indulgence maddeueb (papal) indulgences maddeueb (papal) indurated wedi'i chaledu (with feminine nouns) indurated wedi'i galedu (with masculine nouns) induration calediant indurations calediant indusium indwsiwm indusiums indwsiwm industrial diwydiannol industrial action gweithredu diwydiannol industrial area ardal ddiwydiannol industrial areas ardal ddiwydiannol industrial complex cymhlyg diwydiannol industrial complexes cymhlyg diwydiannol industrial conflict gwrthdaro diwydiannol industrial estate stad ddiwydiannol industrial estates stad ddiwydiannol industrial history hanes diwydiannol industrial marketing marchnata diwydiannol industrial melanism melanedd diwydiannol industrial melanisms melanedd diwydiannol industrial practice arfer diwydiannol industrial practices arfer diwydiannol industrial relations cysylltiadau diwydiannol industrial retraining ailhyfforddi diwydiannol industrial sector sector diwydiannol industrial sectors sector diwydiannol industrial training hyfforddiant diwydiannol industrial training board bwrdd hyfforddi diwydiannol industrial training boards bwrdd hyfforddi diwydiannol industrial trainings hyfforddiant diwydiannol industrial tribunal tribiwnlys diwydiannol industrial tribunals tribiwnlys diwydiannol industrial waste gwastraff diwydiannol industrial wastes gwastraff diwydiannol industrialization diwydiannaeth industrializations diwydiannaeth industrialize diwydianeiddio industry diwydiant industry lead body corff arwain diwydiant ineducable anaddysgadwy ineffective aneffeithiol ineffectiveness aneffeithioldeb inefficiency aneffeithlonrwydd inefficient aneffeithlon inelastic anelastig inelastic collision gwrthdrawiad anelastig inelastic collisions gwrthdrawiad anelastig inelastic scattering gwasgariad anelastig inelastic scatterings gwasgariad anelastig inequalities in health anghydraddoldebau iechyd inequality anhafaledd (in mathematics) inequation anhafaliad inequations anhafaliad inert anadweithiol (without active chemical etc properties) inert difywyd (=without inherent power, sluggish) inert colour lliw difywyd inert colours lliw difywyd inert gas nwy anadweithiol inert pair effect effaith pâr anadweithiol inert pair effects effaith pâr anadweithiol inert substance sylwedd anadweithiol inert substances sylwedd anadweithiol inertia inertia (of property of matter) inertia syrthni (=sloth) inertial inertiaidd inertial frame of reference ffrâm gyfeirio inertiaidd inertias inertia (of property of matter) inertias syrthni (=sloth) inessentials anhanfodion inevitable accident damwain anochel inevitable accidents damwain anochel inextensible anestynadwy infacing scarp sgarp mewnwynebol infacing scarps sgarp mewnwynebol infallible anffaeledig infancy babandod infant baban infant baptism bedydd plant infant baptisms bedydd plant infant mortality marwolaethau babanod infant psychology seicoleg babanod infant school ysgol babanod infant schools ysgol babanod infant welfare lles babanod infant welfares lles babanod infanticide babanladdiad infanticides babanladdiad infantile babanaidd infantry gwŷr traed infants baban infect heintio infected heintiedig infection haint (=infectious disease) infection heintiad (act or process) infections haint (=infectious disease) infections heintiad (act or process) infectious heintus infectious disease clefyd heintus infectious diseases clefyd heintus infer casglu inference casgliad inferences casgliad inferential statistics ystadegau casgliadol inferior gwael (of quality) inferior is (of rank) inferior isaf (in anatomy) inferior israddol (=lower and therefore not as good) inferior goods nwyddau gwael inferior resonance cyseiniant israddol inferior resonances cyseiniant israddol inferiority complex cymhleth israddoldeb inferiority complexes cymhleth israddoldeb infertile anffrwythlon infertility anffrwythlondeb infest bod yn bla infestation pla infestations pla infidel anghrediniwr (=unbeliever) infidel pagan (=pagan) infidels anghrediniwr (=unbeliever) infidels pagan (=pagan) infield maes agos infields maes agos infilling mewnlenwad infillings mewnlenwad infiltrate ymdreiddio infimum inffimwm infinite anfeidraidd infinite canon cylchganon infinite canons cylchganon infinite loop dolen ddiddiwedd infinite loops dolen ddiddiwedd infinitely yn anfeidraidd infinitesimal gorfychan infinitesimal gorfychanyn infinitesimals gorfychanyn infinity anfeidredd infirm methedig infirmary clafdy infix mewnddodi infix mewnddodiad infix notation nodiant mewnddodol infix notations nodiant mewnddodol infixes mewnddodiad inflamed llidus inflammable fflamadwy inflammable liquid hylif fflamadwy inflammable liquids hylif fflamadwy inflammable vapour anwedd fflamadwy inflammable vapours anwedd fflamadwy inflammation llid (medical) inflammations llid (medical) inflate chwyddo (in finance) inflate enchwythu (in physics) inflated enchwythedig inflation chwyddiant (of currency) inflation enchwythiad (=distention with air etc) inflation target targed chwyddiant inflation targets targed chwyddiant inflationary chwyddiannol inflations chwyddiant (of currency) inflations enchwythiad (=distention with air etc) inflection ffurfdro inflections ffurfdro inflexibility anhyblygrwydd inflexible anhyblyg inflexion goslef inflexions goslef inflorescence fflurgainc inflorescences fflurgainc inflow llifo i mewn influence dylanwad influence dylanwadu influences dylanwad influenza ffliw influenza virus firws y ffliw influenzas ffliw influx dylifiad influxes dylifiad infold mewnblygu informal anffurfiol informal approach dull anffurfiol informal approaches dull anffurfiol informal care gofal anffurfiol informal carer gofalydd anffurfiol informal carers gofalydd anffurfiol informal cares gofal anffurfiol informal communication cyfathrebu anffurfiol informal education addysg anffurfiol informal educations addysg anffurfiol informal group grŵp anffurfiol informal groups grŵp anffurfiol informal method dull anffurfiol informal methods dull anffurfiol informal reading inventory rhestr ddarllen anffurfiol informal teaching addysgu anffurfiol information gwybodaeth information bit did gwybodaeth information bits did gwybodaeth information channel sianel wybodaeth information channels sianel wybodaeth information desk desg gwybodaeth information desks desg gwybodaeth information handbook llawlyfr gwybodaeth information handbooks llawlyfr gwybodaeth information handling trin gwybodaeth information mapping mapio gwybodaeth information probability field maes tebygolrwydd gwybodaeth information probability fields maes tebygolrwydd gwybodaeth information processing prosesu gwybodaeth information retrieval adalw gwybodaeth information science gwyddor gwybodaeth information sciences gwyddor gwybodaeth information source ffynhonnell gwybodaeth information sources ffynhonnell gwybodaeth information system system wybodaeth information systems system wybodaeth information technology technoleg gwybodaeth (IT) information technology centre canolfan technoleg gwybodaeth (ITEC) information technology centres canolfan technoleg gwybodaeth (ITEC) information test prawf gwybodaeth information tests prawf gwybodaeth information theory theori gwybodaeth informations gwybodaeth informative advertising hysbysebu er gwybodaeth informative label label gwybodaeth informative labels label gwybodaeth informed choice dewis gwybodus informed choices dewis gwybodus informed consent cydsyniad gwybodus informed consents cydsyniad gwybodus infra-basal iswaelodol infraorbital gland chwarren islygadol infraorbital glands chwarren islygadol infrared isgoch infrared grill gridyll isgoch infrared grills gridyll isgoch infrared wave ton isgoch infrared waves ton isgoch infrareds isgoch infrastructure isadeiledd infrastructures isadeiledd infringement trosedd infringements trosedd infuse trwytho infusion arllwysiad (of action) infusion trwyth (=liquid or admixture) infusions arllwysiad (of action) infusions trwyth (=liquid or admixture) ingate trowel trywel gât ingate trowels trywel gât ingenious dyfeisgar ingenuity dyfeisgarwch ingest amlyncu ingestion amlynciad ingestions amlynciad ingot ingot ingot mould mowld ingot ingot moulds mowld ingot ingots ingot ingredient cynhwysyn ingredients cynhwysyn ingress mynediad ingrowing toenail casewin ingrowing toenails casewin ingrown meander ystum lledrych ingrown meanders ystum lledrych inhabitant trigolyn inhabitants trigolyn inhabited cyfannedd inhalant siphon siffon mewnanadlu inhalant siphons siffon mewnanadlu inhalation mewnanadliad inhalations mewnanadliad inhale mewnanadlu inhaled gases nwyon mewnanadledig inhaler mewnanadlydd inhalers mewnanadlydd inherit etifeddu inheritance etifeddiad (of characteristics) inheritances etifeddiad (of characteristics) inherited etifeddol inherited defect nam etifeddol inherited defects nam etifeddol inhibit atal (in biochemistry, psychology) inhibit llesteirio (=hinder) inhibiting ataliol inhibition ataliad (e.g. enzyme and psychological) inhibition swildod (=shyness) inhibitions ataliad (e.g. enzyme and psychological) inhibitions swildod (=shyness) inhibitor atalydd inhibitors atalydd inhibitory ataliol inhibitory centre canolfannyn ataliol inhibitory centres canolfannyn ataliol inhibitory post-synaptic potential IPSP potensial ôl-synaptig ataliol inhospitable digroeso initial cychwynnol initial ability level lefel gallu cychwynnol initial ability levels lefel gallu cychwynnol initial concentration crynodiad cychwynnol initial concentrations crynodiad cychwynnol initial conditions amodau cychwynnol initial curvature crymedd cychwynnol initial curvatures crymedd cychwynnol initial cycle cylchred gychwynnol initial cycles cylchred gychwynnol initial line llinell gychwynnol initial lines llinell gychwynnol initial proposal cynnig cyntaf initial proposals cynnig cyntaf initial rate cyfradd gychwynnol initial rates cyfradd gychwynnol initial teacher training hyfforddiant cychwynnol i athrawon initial teacher trainings hyfforddiant cychwynnol i athrawon initial velocity cyflymder cychwynnol initialization procedure trefn ymgychwyn initialization procedures trefn ymgychwyn initialize ymgychwyn (disc) initiate agor (=open) initiate cychwyn (=start) initiate proceedings cychwyn achos initiation derbyn (into a religion) initiation reaction adwaith cychwynnol initiation reactions adwaith cychwynnol initiative cam cyntaf (=first step) initiative menter (=enterprise) initiatives cam cyntaf (=first step) initiatives menter (=enterprise) inject chwistrellu (into a receptacle) inject rhoi pigiad (a person) injection chwistrelliad (into a receptacle) injection pigiad (into person) injection moulding mowldio chwistrellu injections chwistrelliad (into a receptacle) injections pigiad (into person) injective mapping mapio mewnsaethol injunction gorfodeb (=judicial order of compulsion) injunction gwaharddeb (=judicial order of restraint) injunctions gorfodeb (=judicial order of compulsion) injunctions gwaharddeb (=judicial order of restraint) injury anaf ink inc ink incio ink drier sychydd inc ink driers sychydd inc ink roller rholer inc ink rollers rholer inc ink sac coden inc ink sacs coden inc ink thinner teneuydd inc ink thinners teneuydd inc ink-jet printer argraffydd chwistrell ink-jet printers argraffydd chwistrell inking in incio inking slab slab incio inking slabs slab incio inkle loom gwŷdd incl inkle looms gwŷdd incl inland mewndirol inlay mewnosod inlay mewnosodiad inlay strings llinynnau mewnosod inlet cilfach (of sea, lake) inlet mewnfa (=intake) inlet-head blaen cilfach inlet-heads blaen cilfach inlets cilfach (of sea, lake) inlets mewnfa (=intake) inlier mewngraig inliers mewngraig inn of court neuadd brawdlys innate cynhenid inner mewnol inner bead glain mewnol inner beads glain mewnol inner city dinas fewnol inner city school ysgol dinas fewnol inner city schools ysgol dinas fewnol inner core craidd mewnol inner cores craidd mewnol inner ear clust fewnol inner ears clust fewnol inner face wyneb mewnol inner faces wyneb mewnol inner parts rhannau mewnol inner pedal pedal mewnol inner pedals pedal mewnol innermost nesaf i mewn innervate nerfogi innervation nerfogaeth innervations nerfogaeth innings batiad innominate anenwol (of artery) innovate arloesi innovation arloesedd innovation cyfnewidiad (=alteration) innovation datblygiad newydd (=new development) innovation newyddbeth (=new thing) innovations arloesedd innovations cyfnewidiad (=alteration) innovations datblygiad newydd (=new development) innovations newyddbeth (=new thing) inoculate brechu inoculation brechiad inoculation theory damcaniaeth brechu inoculations brechiad inorganic anorganig input cyfraniad (=contribution of information) input mewnbwn (=information fed into a computer) input mewnbynnu input mewngyrch (in finance) input / output buffer byffer mewnbwn / allbwn input / output buffers byffer mewnbwn / allbwn input / output device dyfais mewnbwn / allbwn input / output devices dyfais mewnbwn / allbwn input / output routine rheolwaith mewnbwn / allbwn input / output routines rheolwaith mewnbwn / allbwn input / output stream mewnlif / all-lif input / output streams mewnlif / all-lif input control system system reoli mewnbwn input control systems system reoli mewnbwn input stream mewnlif input streams mewnlif input unit uned fewnbynnu input units uned fewnbynnu inputs cyfraniad (=contribution of information) inputs mewnbwn (=information fed into a computer) inputs mewngyrch (in finance) inquest cwest inquests cwest inquiry ymchwiliad (=investigation) inquiry ymholiad (=question) inquisition chwilys (=ecclesiastical court) inquisition ymchwiliad (=enquiry) inquisitions chwilys (=ecclesiastical court) inquisitions ymchwiliad (=enquiry) inquisitorial system system holgar inquisitorial systems system holgar insane gwallgof inscribe arysgrifio inscribed circle mewngylch (in-circle) inscribed circles mewngylch (in-circle) inscription arysgrif inscriptions arysgrif insect pryfyn insect attack ymosodiad trychfilod insect attacks ymosodiad trychfilod insect bite pigiad pryfyn insect bites pigiad pryfyn insecticide pryfleiddiad insecticides pryfleiddiad insectivorous pryfysol insects pryfyn insemination ymhadiad inseminations ymhadiad insequent haplif insequent stream ffrwd haplif insequent streams ffrwd haplif insequents haplif insert mewnosod insert mewnosodiad insert file mewnosod ffeil insert header mewnosod pennyn insert merge field mewnosod maes cyfun inserted stitch pwyth cyswllt inserted stitches pwyth cyswllt insertion mewniad insertion sort trefniad mewnosod insertion sorts trefniad mewnosod insertions mewniad inserts mewnosodiad inset mewnosodiad insets mewnosodiad inshore gyda'r glannau inshore fishing pysgota'r glannau inside tu mewn inside callipers caliperau mewnol inside diameter diamedr mewnol inside diameters diamedr mewnol inside forward mewnwr inside forwards mewnwr inside half mewnwr inside halfs mewnwr inside left mewnwr chwith inside lefts mewnwr chwith inside leg coes fewnol inside legs coes fewnol inside micrometer micromedr mewnol inside micrometers micromedr mewnol inside of glove cledr y faneg inside right mewnwr de (of player) inside rights mewnwr de (of player) inside the circle tu mewn i'r cylch inside the circles tu mewn i'r cylch insides tu mewn insight mewnwelediad insights mewnwelediad insolation darheulad insolations darheulad insolubility anhydoddedd insoluble anhydawdd insolvency methdaliad insolvent methdalwr insolvents methdalwr insomnia anhunedd insomnias anhunedd inspect arolygu inspection arolygiad inspection chamber siambr archwilio inspection chambers siambr archwilio inspections arolygiad inspector arolygwr inspectorate arolygiaeth inspectorates arolygiaeth inspectors arolygwr inspiration mewnanadliad (of air) inspiration ysbrydoliaeth (poetic etc) inspirations mewnanadliad (of air) inspirations ysbrydoliaeth (poetic etc) inspiratory reserve volume cyfaint mewnanadlol wrth gefn inspiratory reserve volumes cyfaint mewnanadlol wrth gefn inspire ysbrydoli (poetic etc) inspired air aer mewnanadledig inspired airs aer mewnanadledig instability ansadrwydd (of object) instability ansefydlogrwydd (of economy, society etc) install gosod (machinery, software etc) install dictionaries gosod geiriaduron installation program rhaglen osod installation programs rhaglen osod instalment rhandal instalments rhandal instant ennyd instant grip wrench tyndro gafael ebrwydd instant grip wrenches tyndro gafael ebrwydd instantaneous ebrwydd (in general) instantaneous enydaidd (in physics) instantaneous centre of rotation canol enydaidd y cylchdro instantaneous grip gafael ebrwydd instantaneous grip vice feis gafael ebrwydd instantaneous grip vices feis gafael ebrwydd instantaneous grips gafael ebrwydd instantaneous water-heater gwresogydd dŵr ebrwydd instantaneous water-heaters gwresogydd dŵr ebrwydd instants ennyd instep cefn troed insteps cefn troed instinct greddf instinctive behaviour ymddygiad greddfol instinctive behaviours ymddygiad greddfol instincts greddf institute sefydliad institute of education athrofa institute of legal executives sefydliad y gweithredwyr cyfreithlon institutes sefydliad institution sefydliad institutional sefydliadol institutional care gofal mewn sefydliad institutional cares gofal mewn sefydliad institutional determinant penderfynyn sefydliadol institutional determinants penderfynyn sefydliadol institutional discrimination gwahaniaethu sefydliadol institutional history hanes sefydliadau institutionalize sefydliadu institutions sefydliad instruction cyfarwyddyd instruction address cyfeiriad cyfarwyddyd instruction cycle cylchred gyfarwyddyd instruction cycles cylchred gyfarwyddyd instruction decoder datgodiwr cyfarwyddyd instruction decoders datgodiwr cyfarwyddyd instruction format fformat cyfarwyddyd instruction formats fformat cyfarwyddyd instruction register cofrestr gyfarwyddyd instruction registers cofrestr gyfarwyddyd instruction set set gyfarwyddiadau instruction sets set gyfarwyddiadau instruction sheet taflen gyfarwyddiadau instruction sheets taflen gyfarwyddiadau instruction word gair cyfarwyddiadol instruction words gair cyfarwyddiadol instructional programme rhaglen hyfforddi instructional programmes rhaglen hyfforddi instructions cyfarwyddyd instructor hyfforddwr instructors hyfforddwr instrument offeryn (=implement) instrument offeryn (of music) instrumental offerynnol (of music) instrumental ostinato ostinato offerynnol instrumental part rhan offerynnol instrumental parts rhan offerynnol instrumental writing ysgrifennu ar gyfer offerynnau instrumentalist offerynnwr instrumentalists offerynnwr instrumentation offeryniaeth instrumentations offeryniaeth instruments offeryn (=implement) instruments offeryn (of music) insular ynysol insulate ynysu insulated ynysedig insulating board bwrdd ynysu insulating boards bwrdd ynysu insulating material defnydd ynysu insulating materials defnydd ynysu insulation ynysiad insulations ynysiad insulator ynysydd insulators ynysydd insulin inswlin insulin-dependent diabetes mellitus diabetes mellitus dibynnol ar inswlin insulins inswlin insurance yswiriant insurance policy polisi yswiriant insurances yswiriant insure yswirio insured yswiriedig insured population poblogaeth yswiriedig insured populations poblogaeth yswiriedig insurer yswiriwr insurers yswiriwr insurrection gwrthryfel insurrections gwrthryfel intact spurs sbardunau didoriad intaglio intaglio intaglio engraving ysgythriad intaglio intaglio engravings ysgythriad intaglio intake cymeriant (of food) intake ffridd (land) intake mewnlif (flow) intake nifer a dderbynnir intake and output cymeriant ac allgynnyrch intake and outputs cymeriant ac allgynnyrch intakes cymeriant (of food) intakes ffridd (land) intakes mewnlif (flow) intakes nifer a dderbynnir intarsia intarsia intarsias intarsia integer cyfanrif integer arithmetic rhifyddeg cyfanrifau integer arithmetics rhifyddeg cyfanrifau integer value gwerth cyfanrifol integer values gwerth cyfanrifol integer variable newidyn cyfanrifol integer variables newidyn cyfanrifol integers cyfanrif integral annatod (part of something) integral cyfannol (of integer) integral integrol (of calculus) integral integryn (of calculus) integral calculus calcwlws integrol integral diagram diagram integrol integral diagrams diagram integrol integral domain parth integrol integral domains parth integrol integral multiple lluosrif cyfannol integral multiples lluosrif cyfannol integral value gwerth cyfannol integral values gwerth cyfannol integrals integryn (of calculus) integrand integrand integrands integrand integrate cyfannu (=combine into a whole or complete by the addition of parts) integrate integreiddio (=bring into equal participation) integrate integru (=find the integral of) integrate children integreiddio plant integrate society cyfannu cymdeithas integrated cyfannol (of objects) integrated integredig (of children, people) integrated circuit cylched gyfannol (IC) integrated circuits cylched gyfannol (IC) integrated course cwrs cyfannol integrated courses cwrs cyfannol integrated curriculum cwricwlwm cyfannol integrated curriculums cwricwlwm cyfannol integrated day diwrnod cyfannol integrated learning dysgu cyfannol integrated school ysgol gyfannol integrated schools ysgol gyfannol integrated studies astudiaethau cyfannol integrated support service gwasanaeth cefnogi cyfannol integrated support services gwasanaeth cefnogi cyfannol integrated syllabus maes llafur cyfannol integrated training hyfforddiant cyfannol integrated trainings hyfforddiant cyfannol integration cyfannu (of parts into a whole) integration integreiddiad integration integreiddio (of people) integration integriad (in calculus) integration by parts integru fesul rhan integration time amser integru integration times amser integru integrations integreiddiad integrations integriad (in calculus) integrative integreiddiol integrity cyfanrwydd (=wholeness) integrity unplygrwydd (=moral uprightness) integument pilyn integuments pilyn intellectual deallusol intellectual development datblygiad deallusol intellectual developments datblygiad deallusol intellectual experience profiad deallusol intellectual experiences profiad deallusol intellectual factor ffactor ddeallusol intellectual factors ffactor ddeallusol intellectual property rights hawliau eiddo deallusol intelligence deallusrwydd intelligence quotient cyniferydd deallusrwydd (I.Q.) intelligence quotients cyniferydd deallusrwydd (I.Q.) intelligence test prawf deallusrwydd intelligence tests prawf deallusrwydd intelligences deallusrwydd intelligent deallus intelligent knowledge based systems systemau deallus yn seiliedig ar wybodaeth (IKBS) intelligent terminal terfynell ddeallus intelligent terminals terfynell ddeallus intelligentsia deallusion intense angerddol (of feeling) intense dwys intense tanbaid (of light) intensity angerdd (of feeling) intensity arddwysedd (in physics) intensity tanbeidrwydd (of light) intensive arddwys (in physics) intensive care gofal dwys intensive cares gofal dwys intention bwriad intentions bwriad inter-block gap bwlch rhyngfloc inter-block gaps bwlch rhyngfloc inter-granal rhyng-granaidd interact rhyngweithio interaction rhyngweithiad interactions rhyngweithiad interactive rhyngweithiol interactive video fideo rhyngweithiol interagency work gwaith rhwng asiantaethau interagency works gwaith rhwng asiantaethau interbedded rhynghaenol interbreed rhyngfridio intercalary rhyngosodol intercede eiriol intercellular rhyng-gellol intercellular spaces gwagleoedd rhyng-gellol intercept rhyng-gipio (a ball in sport) intercept rhyng-gyfarfod (e.g. of aeroplanes) intercept rhyngdoriad (in mathematics) intercept rhyngdorri (in mathematics) interception rhyng-gipiad (of a ball in sport) interception rhyng-gyfarfyddiad (e.g. of aeroplanes) interceptions rhyng-gipiad (of a ball in sport) interceptions rhyng-gyfarfyddiad (e.g. of aeroplanes) intercepts rhyngdoriad (in mathematics) intercession eiriolaeth intercessions eiriolaeth interchange cydgyfnewid (in mathematics) interchange ymgyfnewid (of data) interchangeable cydgyfnewidiol (in mathematics) interconvertibility rhyngdrawsnewidioldeb intercorrelation rhyng-gydberthyniad intercorrelations rhyng-gydberthyniad intercostal rhyngasennol intercourse cyfathrach rywiol (sexual) intercourses cyfathrach rywiol (sexual) interdepartmental rhyngadrannol interdependence cyd-ddibyniaeth interdependences cyd-ddibyniaeth interdependent cyd-ddibynnol interdependent variable newidyn rhyngddibynnol interdependent variables newidyn rhyngddibynnol interdict gwaharddiad interdicts gwaharddiad interdrumlin rhyngdrymlinol interest budd (=advantage or profit) interest diddordeb (=concern, curiosity, pastime) interest llog (=money paid for money lent) interest area maes diddordeb interest areas maes diddordeb interest rate cyfradd llog interest rates cyfradd llog interest-getting question cwestiwn i ddenu diddordeb interest-getting questions cwestiwn i ddenu diddordeb interesting diddorol interests budd (=advantage or profit) interests diddordeb (=concern, curiosity, pastime) interests llog (=money paid for money lent) interface rhyngwyneb interface rhyngwynebu interfaces rhyngwyneb interfacial rhyngwynebol interfacing wynebyn cudd interfacings wynebyn cudd interfascicular rhyngffasgellol interference ymyrraeth (in general) interference fit ffit ymyrryd interference fits ffit ymyrryd interferences ymyrraeth (in general) interfering ymyrrol interferometer ymyradur interferometers ymyradur interferon interfferon interferons interfferon interfluve tir rhyngafonol interfluves tir rhyngafonol intergalactic rhyngalaethog interglacial rhyngrewlifol intergroup discrimination gwahaniaethu ar sail grŵp interim interim interim report adroddiad interim interim reports adroddiad interim interior mewndir (of land) interior mewndirol (of land) interior mewnol (in general) interior tu mewn (=inside) interior angle ongl fewnol interior angles ongl fewnol interior decorating addurno mewnol interior decoration addurn mewnol interior decorations addurn mewnol interior plywood pren haenog mewnol interior plywoods pren haenog mewnol interiors mewndir (of land) interiors tu mewn (=inside) interlace rhyngles interlace rhynglesio interlaces rhyngles interlining leinin cudd interlinings leinin cudd interlink cydgysylltu interlinked cydgysylltiol interlock cydgloi interlocked grain graen rhyng-gloëdig interlocked grains graen rhyng-gloëdig interlocking device dyfais gydgloëdig interlocking devices dyfais gydgloëdig interlocking spurs sbardunau pleth interlude egwyl (in a performance) interludes egwyl (in a performance) intermediary cyfryngwr intermediary compound rhyng-gyfansoddyn intermediary compounds rhyng-gyfansoddyn intermediary metabolism metabolaeth ryngol intermediary metabolisms metabolaeth ryngol intermediate canolradd (in education) intermediate rhyngolyn (in biology) intermediate area ardal lwyd (=grey area) intermediate areas ardal lwyd (=grey area) intermediate education addysg ganolradd intermediate educations addysg ganolradd intermediate goods nwyddau rhyngol intermediate layer haen ryngol intermediate layers haen ryngol intermediate school ysgol ganolradd intermediate schools ysgol ganolradd intermediate state rhyng-gyflwr (in mathematics) intermediate states rhyng-gyflwr (in mathematics) intermediates rhyngolyn (in biology) intermezzo intermezzo intermittent ysbeidiol intermittent feed porthiant ysbeidiol intermittent feeds porthiant ysbeidiol intermittent stream ffrwd ysbeidiol intermittent streams ffrwd ysbeidiol intermix cydgymysgiad intermix cydgymysgu intermixable rhyng-gymysgadwy intermixes cydgymysgiad intermixture cydgymysgedd intermixtures cydgymysgedd intermont rhyngfynyddig internal mewnol internal assessment asesu mewnol internal assessor aseswr mewnol internal assessors aseswr mewnol internal bisector hanerydd mewnol internal bisectors hanerydd mewnol internal bleeding gwaedu mewnol internal capsule cwpan mewnol internal capsules cwpan mewnol internal circlip cylchglip mewnol internal circlips cylchglip mewnol internal combustion engine peiriant tanio mewnol internal combustion engines peiriant tanio mewnol internal comfort cynhesrwydd mewnol internal comforts cynhesrwydd mewnol internal communication cyfathrebu mewnol internal degree gradd fewnol internal degrees gradd fewnol internal diameter diamedr mewnol internal diameters diamedr mewnol internal environment amgylchedd mewnol internal environments amgylchedd mewnol internal examination arholiad mewnol internal examinations arholiad mewnol internal examiner arholwr mewnol internal examiners arholwr mewnol internal fabric ffabrig mewnol internal fabrics ffabrig mewnol internal growth twf mewnol internal growths twf mewnol internal illumination golau mewnol internal illuminations golau mewnol internal inquiry ymchwiliad mewnol internal pressure gwasgedd mewnol internal pressures gwasgedd mewnol internal recruitment recriwtio mewnol internal resistance gwrthiant mewnol internal resistances gwrthiant mewnol internal respiration resbiradaeth fewnol internal respirations resbiradaeth fewnol internal secretion secretiad mewnol internal secretions secretiad mewnol internal step cam mewnol internal steps cam mewnol internal verifier dilysydd mewnol internal verifiers dilysydd mewnol internal wall wal fewnol internal walls wal fewnol internalize mewnoli international rhyngwladol international dimension dimensiwn rhyngwladol international dimensions dimensiwn rhyngwladol international ferry terminal terminws llongau fferi rhyngwladol international ferry terminals terminws llongau fferi rhyngwladol international history hanes rhyngwladol international hotel chain cadwyn ryngwladol o westai international hotel chains cadwyn ryngwladol o westai international level lefel ryngwladol international levels lefel ryngwladol international market marchnad ryngwladol international marketing marchnata rhyngwladol international markets marchnad ryngwladol international paper sizes meintiau papur rhyngwladol international relations cydberthynas y gwledydd international runner rhedwr rhyngwladol international runners rhedwr rhyngwladol international sport chwaraeon rhyngwladol international tension tensiwn rhyngwladol international tensions tensiwn rhyngwladol international trade masnach ryngwladol international trades masnach ryngwladol internationalism rhyngwladoliaeth internationalisms rhyngwladoliaeth internecine cyd-ddinistriol internet banking bancio rhyngrwyd internet connection cysylltiad rhyngrwyd internet connections cysylltiad rhyngrwyd internodal rhyngnodol internode internod internodes internod interpenetrate cydymdreiddio interpenetration cyd-dreiddiad interpenetrations cyd-dreiddiad interpersonal rhyngbersonol interpersonal communication cyfathrebu rhyngbersonol interpersonal relations cydberthynas rhwng pobl interpersonal skills sgiliau rhyngbersonol interphase rhyngwedd interphases rhyngwedd interplay cydadwaith interpolate rhyngosod interpolation rhyngosodiad interpolations rhyngosodiad interpret dehongli interpretation dehongliad interpretations dehongliad interpreted language iaith ddeongledig interpreted languages iaith ddeongledig interpreter dehonglydd (=computing program) interpreters dehonglydd (=computing program) interpretive code cod deongliadol interpretive codes cod deongliadol interquartile rhyngchwartel interquartile range amrediad rhyngchwartel interquartile ranges amrediad rhyngchwartel interquartiles rhyngchwartel interregnum interregnum interregnums interregnum interrelate cydberthyn interrelated variables newidynnau sy'n rhyngberthyn interrelationship cydberthynas interrelationships cydberthynas interrogate holi interrogatory cwestiyneb interrogatory holiadol interrupt ymyriad interrupt ymyrryd interrupt event digwyddiad ymyriadol interrupt events digwyddiad ymyriadol interrupt line lein ymyriadol interrupt lines lein ymyriadol interrupt service routine rheolwaith trin ymyriadau interrupt service routines rheolwaith trin ymyriadau interrupt trap magl ymyriadol interrupt traps magl ymyriadol interrupted cadence diweddeb annisgwyl interrupted cadences diweddeb annisgwyl interrupts ymyriad interschool competition cystadleuaeth rhwng ysgolion interschool competitions cystadleuaeth rhwng ysgolion intersect croestorri intersecting prisms prismau croestoriadol intersection croestoriad intersection of sets croestoriad setiau intersections croestoriad interspecific rhyngrywogaethol interstellar accretion ymgasgliad rhyngserol interstellar accretions ymgasgliad rhyngserol interstitial interstitaidd interstitial cells celloedd interstitaidd interstitial condensation cyddwysiad interstitaidd interstitial condensations cyddwysiad interstitaidd intertextuality rhyngdestuniaeth intertropical rhyngdrofannol intertropical front ffrynt rhyngdrofannol intertropical fronts ffrynt rhyngdrofannol interval cyfwng (in music, mathematics) interval egwyl (=break time) interval ysbaid (=intervening time) interval timer amserydd cyfwng interval timers amserydd cyfwng interval training hyfforddiant egwyl interval trainings hyfforddiant egwyl intervals cyfwng (in music, mathematics) intervals egwyl (=break time) intervals ysbaid (=intervening time) intervene ymyrryd intervening rhyngol intervention ymyriad intervention price pris ymyrrol intervention prices pris ymyrrol interventions ymyriad intervertebral disc disg rhyngfertebrol intervertebral discs disg rhyngfertebrol interview cyfweld interview cyfweliad interviewee cyfwelai interviewees cyfwelai interviewer cyfwelydd interviewers cyfwelydd interviews cyfweliad intestinal coluddol intestine coluddyn intestines coluddyn intimacy agosatrwydd into function ffwythiant i mewn into functions ffwythiant i mewn intolerance anoddefgarwch intolerances anoddefgarwch intonation rhagnod (in plainsong) intonation tonyddiaeth (of instrument or voice) intonations rhagnod (in plainsong) intonations tonyddiaeth (of instrument or voice) intone goslefu intracellular mewngellol intractable anhydrin intrada intrada intradas intrada intradermal injection pigiad mewngroenol intradermal injections pigiad mewngroenol intrados of an arch cromlin fewnol bwa intramolecular mewnfoleciwlaidd intramuscular injection pigiad mewngyhyrol intramuscular injections pigiad mewngyhyrol intranet mewnrwyd intranets mewnrwyd intransitive anhrosaidd (in mathematics) intrapleural drainage draeniad mewnblewrol intrapleural drainages draeniad mewnblewrol intraspecific mewnrhywogaethol intrauterine loop dolen fewngroth intrauterine loops dolen fewngroth intravenous mewnwythiennol intravenous infusion arllwysiad mewnwythiennol (of action) intravenous infusion trwyth mewnwythiennol (of liquid) intravenous infusions arllwysiad mewnwythiennol (of action) intravenous infusions trwyth mewnwythiennol (of liquid) intrazonal cydgylchfaol intricate cymhleth intricate pattern patrwm cymhleth intricate patterns patrwm cymhleth intricate shape ffurf gymhleth intricate shapes ffurf gymhleth intricate work gwaith cymhleth intricate works gwaith cymhleth intrigue cynllwyn intrigues cynllwyn intrinsic cynhenid intrinsic energy egni cynhenid intrinsic movement symudiad cynhenid intrinsic movements symudiad cynhenid intrinsic spin troelliad cynhenid intrinsic spins troelliad cynhenid introduce cyflwyno introduction cyflwyniad (of person to another) introduction rhagarweiniad (in music etc) introduction rhagymadrodd (=explanatory section of book) introductions cyflwyniad (of person to another) introductions rhagarweiniad (in music etc) introductions rhagymadrodd (=explanatory section of book) introductory activity gweithgaredd rhagarweiniol introvert mewnblyg intrude ymwthio intrusion mewnwthiad (of rock) intrusion ymwthiad (in general) intrusions mewnwthiad (of rock) intrusions ymwthiad (in general) intrusive mewnwthiol (of rock) intrusive rock craig fewnwthiol intrusive rocks craig fewnwthiol intubation mewndiwbio intuition greddf intuitions greddf intuitive sythweledol intuitive stage cyfnod sythweledol intuitive stages cyfnod sythweledol intuitive thought meddwl sythweledol intuitive thoughts meddwl sythweledol intuitive understanding dealltwriaeth sythweledol intuitive understandings dealltwriaeth sythweledol inundate gorlifo invade goresgyn invader goresgynnwr invaders goresgynnwr invaginate ymweinio invagination ymweiniad invaginations ymweiniad invalid annilys (of passport etc) invalid claf invalid methedig (of person) invalidate dirymu invalidity benefit budd-dal y methedig invalidity benefits budd-dal y methedig invalids claf invariant sefydlog invariant sefydlyn invariants sefydlyn invasion goresgyniad invasion game gêm goresgyn invasion games gêm goresgyn invasions goresgyniad invasive procedure gweithred fewnwthiol invasive procedures gweithred fewnwthiol invent dyfeisio invention dyfais inventions dyfais inventive dyfeisgar inventor dyfeisiwr inventors dyfeisiwr inventory rhestr eiddo inventory management rheolaeth restru inventory managements rheolaeth restru inverse gwrthdro inverse element elfen wrthdro inverse elements elfen wrthdro inverse functions ffwythiannau gwrthdro inverse matrix matrics gwrthdro inverse matrixes matrics gwrthdro inverse operation gweithrediad gwrthdro inverse operations gweithrediad gwrthdro inverse ratio cymhareb wrthdro inverse square law deddf sgwâr gwrthdro inverse square laws deddf sgwâr gwrthdro inverse variation amrywiad gwrthdro inverse variations amrywiad gwrthdro inverses gwrthdro inversion gwrthdro (in music) inversion gwrthdroad (in general) inversion of chord gwrthdro cord inversion of temperature gwrthdroad tymheredd inversions gwrthdro (in music) inversions gwrthdroad (in general) invert gwrthdroi invert level lefel wrthdro invert levels lefel wrthdro invert sugar siwgr gwrthdroëdig invert sugars siwgr gwrthdroëdig invertase infertas invertases infertas invertebral rhyngfertebrol invertebrate infertebrat invertebrates infertebrat inverted gwrthdro inverted gwrthdroedig inverted answer ateb wyneb i waered inverted answers ateb wyneb i waered inverted cone côn gwrthdro inverted cones côn gwrthdro inverted image delwedd wrthdro inverted images delwedd wrthdro inverted mordent isfordent inverted mordents isfordent inverted pleat plet wrthdro inverted pleats plet wrthdro inverted pyramid pyramid gwrthdro inverted pyramids pyramid gwrthdro inverted relief tirwedd wrthdro inverted reliefs tirwedd wrthdro inverted tuck twc gwrthdro inverted tucks twc gwrthdro inverting amplifier mwyhadur gwrthdroadol inverting amplifiers mwyhadur gwrthdroadol invertor gwrthdröydd invertors gwrthdröydd invest arwisgo (=clothe) invest buddsoddi (financial) invest gosod gwarchae (=lay siege) investigate ymchwilio investigate scientific questions ymchwilio i gwestiynau gwyddonol investigation archwiliad (medical) investigation astudiaeth (=study) investigation ymchwiliad (of crime etc) investigations archwiliad (medical) investigations astudiaeth (=study) investigations ymchwiliad (of crime etc) investigative ymchwiliol investigative geography daearyddiaeth ymchwiliol investigative method dull ymchwiliol investigative methods dull ymchwiliol investigative psychology seicoleg ymchwiliol investigative work gwaith ymchwilio investigative works gwaith ymchwilio investiture arwisgo investment arwisgiad (of power) investment buddsoddiad (of money) investment appraisal gwerthuso buddsoddiad investment casting castio patrwm aberthol investments arwisgiad (of power) investments buddsoddiad (of money) investor buddsoddwr investors buddsoddwr inviable anhyfyw invigilator goruchwyliwr invigilators goruchwyliwr invigorating bywiogus inviscid anludiog invisible cudd (=hidden) invisible earnings enillion anweledig invisible exports allforion anweledig invisible hemming hemio cudd invisible hinge colfach cudd invisible hinges colfach cudd invisible line llinell gudd invisible lines llinell gudd invisible mending cyweirio cudd invisible zip sip cudd invisible zips sip cudd invitation to treat gwahoddiad i drafod invite gwahodd invocation of saints ymbil ar y saint invoice anfoneb invoice number rhif yr anfoneb invoice numbers rhif yr anfoneb invoices anfoneb invoicing anfonebu involucre cylchamlen involucres cylchamlen involuntary anwirfoddol involuntary action gweithred anwirfoddol involuntary actions gweithred anwirfoddol involuntary muscle cyhyr anrheoledig involuntary muscles cyhyr anrheoledig involute infoliwt involute gear gêr infoliwt involute gear rack rac gêr infoliwt involute gear racks rac gêr infoliwt involute gears gêr infoliwt involutes infoliwt involution infolytedd involutions infolytedd inward mewnol inward grasp mewnafael inward grasps mewnafael inward investment buddsoddiad o'r tu allan inward investments buddsoddiad o'r tu allan inwards tuag i mewn iodine ïodin (I) iodines ïodin (I) ion ïon ion exchange resin resin cyfnewid ïonau ion exchange resins resin cyfnewid ïonau ionic ïonig ionic bond bond ïonig ionic bonds bond ïonig ionic equation hafaliad ïonig ionic equations hafaliad ïonig ionisation energy egni ïoneiddiad ionizable ïonadwy ionization ïoneiddiad ionization chamber llestr ïoneiddiad ionization chambers llestr ïoneiddiad ionizations ïoneiddiad ionize ïoneiddio ionosphere ïonosffer ionospheres ïonosffer iridium iridiwm (Ir) iridiums iridiwm (Ir) iris iris (eye) iron haearn (Fe) iron haearn smwddio (appliance) iron smwddio iron cored solenoid solenoid craidd haearn iron cored solenoids solenoid craidd haearn iron filings naddion haearn iron ion ïon haearn iron ions ïon haearn iron mould rhwd haearn iron moulds rhwd haearn iron nipping press gwasg haearn nipio iron on gwreslynu iron on interfacing wynebyn cudd gwreslyn iron ore mwyn haearn iron ores mwyn haearn iron oxide haearn ocsid iron oxides haearn ocsid iron pan cletir haearn iron pans cletir haearn iron pyrites pyrit haearn iron setting gosodiad haearn iron settings gosodiad haearn iron tubing tiwbin haearn iron tubings tiwbin haearn iron wire gwifren haearn iron wires gwifren haearn iron-cored coil coil craidd haearn iron-cored coils coil craidd haearn iron-on transfer trosglwyddyn gwreslynol iron-on transfers trosglwyddyn gwreslynol ironclad llong haearn ironclads llong haearn ironing board bwrdd smwddio ironing boards bwrdd smwddio ironing pad pad smwddio ironing pads pad smwddio ironmongery nwyddau haearn (hardware) irons haearn (Fe) irons haearn smwddio (appliance) irradiate arbelydru irradiation arbelydriad irradiations arbelydriad irrational afresymol (=unreasonable) irrational anghymarebol (in mathematics) irrational number rhif anghymarebol irrational numbers rhif anghymarebol irrecoverable error gwall anadferadwy irrecoverable errors gwall anadferadwy irredeemable diatbryn (in economics) irredeemable bonds bondiau diatbryn irredentism iredentiaeth irredentisms iredentiaeth irreducible anostyngadwy irregular afreolaidd irregular cadence diweddeb annisgwyl irregular cadences diweddeb annisgwyl irregular crust cramen afreolaidd irregular crusts cramen afreolaidd irregular solid solid afreolaidd irregular solids solid afreolaidd irregularity afreoleidd-dra irrelevant amherthnasol irreversible anghildroadwy (of reaction) irrigate dyfrhau irrigated dyfredig irrigation dyfrhad irrigation ditch ffos ddyfrhau irrigation ditches ffos ddyfrhau irrigations dyfrhad irritability sensitifedd irritation cosi poenus (of itchy skin) irrotational anghylchdro isallobar isalobar isallobars isalobar isanomalous line llinell anomaledd isanomalous lines llinell anomaledd ischaemic ischaemig (heart disease) ischium ischiwm ischiums ischiwm isentropic isentropig islet ynysig islets ynysig islets of Langherans ynysoedd Langerhans isobar isobar isobaric isobarig isobars isobar isobath isobath isobaths isobath isobathytherm isobathytherm isobathytherms isobathytherm isobront isobront isobronts isobront isochrone isocron isochrones isocron isochronous isocronus isoclinal folding plygiant isoclinol isoclinal foldings plygiant isoclinol isocline isoclin isoclines isoclin isoenzyme isoensym isoenzymes isoensym isogamy isogamedd isogeotherm isogeotherm isogeotherms isogeotherm isogloss isoglos isogon isogon isogonal isogonol isogons isogon isohaline isohalaidd isohel isohel isohels isohel isohyet glawlin isohyets glawlin isohypse cyfuchlin (contour) isohypses cyfuchlin (contour) isokinetic isocinetig isokinetic muscle contraction cyfangiad cyhyrol isocinetig isokinetic muscle contractions cyfangiad cyhyrol isocinetig isolate arunigo (a chemical) isolate neilltuo (in economics) isolate unigyn (of child) isolated arunig (of chemical) isolates unigyn (of child) isolation arwahanrwydd isolation hospital ysbyty heintiau isolation hospitals ysbyty heintiau isolation valve falf ynysu isolation valves falf ynysu isolation ward ward arwahanu isolation wards ward arwahanu isolationism ymneilltuedd isolationisms ymneilltuedd isolationist arwahanydd isolationists arwahanydd isolations arwahanrwydd isolator arunigydd isolators arunigydd isoleucine isolewcin isoleucines isolewcin isomer isomer isomerism isomeredd isomerisms isomeredd isomerization isomeru isomers isomer isometric isometrig isometric axis echelin isometrig isometric drawing lluniad isometrig isometric drawings lluniad isometrig isometric muscle contraction cyfangiad cyhyrol isometrig isometric muscle contractions cyfangiad cyhyrol isometrig isometric plane plân isometrig isometric planes plân isometrig isometric projection tafluniad isometrig isometric projections tafluniad isometrig isometric scale graddfa isometrig isometric scales graddfa isometrig isometric view golwg isometrig isometric views golwg isometrig isometry isometreg isomorphic isomorffig isomorphism isomorffedd isomorphisms isomorffedd isomorphous isomorffus isoneph isoneff isonephs isoneff isoperimetric isoperimetrig isophene isoffen isophenes isoffen isopleth isopleth isopleths isopleth isorhythmic isorhythmig isoryme rhewlin isorymes rhewlin isosceles isosgeles isosceles triangle triongl isosgeles isosceles triangles triongl isosgeles isoseismal isoseismol isoseismic isoseismig isostade isostad isostades isostad isostasy isostasi isostatic adjustment cymhwysiad isostatig isostatic adjustments cymhwysiad isostatig isostatic anomaly anomaledd isostatig isostatic equilibrium cydbwysedd isostatig isostatic equilibriums cydbwysedd isostatig isotach isotach isotaches isotach isotactic isotactig isotherm isotherm isothermal isothermal isothermals isothermal isothermic isothermig isotherms isotherm isotonic isotonig isotonicity isotonedd isotope isotop isotopes isotop isotopic isotopig isotropic surface arwyneb isotropig isotropic surfaces arwyneb isotropig isovaline isofalin isovalines isofalin issue cyhoeddi (=publish) issue dyroddi (provide) issue mater (=important topic) issue tarddiad (of a gas) issue tarddu (of a gas) issues mater (=important topic) issues tarddiad (of a gas) isthmus culdir italic italig italic alphabet gwyddor italig italic alphabets gwyddor italig italic letter llythyren italig italic letters llythyren italig italic pen pen italig italic pens pen italig italic writing pen ysgrifbin italig italic writing pens ysgrifbin italig italicize italeiddio italics italig itch cosi item eitem item bank cronfa eitemau item banks cronfa eitemau item of expenditure eitem gwariant item testing profi eitemau items eitem iterate iteru iteration iteriad iterations iteriad iterative iterus iterative method dull iterus iterative methods dull iterus iterative routine rheolwaith iterus iterative routines rheolwaith iterus iterative search chwiliad iterus iterative searches chwiliad iterus itinerant teacher athrawes deithiol (female) itinerant teacher athro teithiol (male) itinerant teachers athrawes deithiol (female) itinerant teachers athro teithiol (male) itinerary amserlen teithio ivory ifori ivory black du ifori ivory blacks du ifori ivory tower tŵr ifori ivory towers tŵr ifori ivy stem coesyn iorwg ivy stems coesyn iorwg jabot jabot jabots jabot jack jac jack jacio jack rafter ceibr byr jack rafters ceibr byr jacket siaced jackets siaced jackplane plaen jac jackplanes plaen jac jacks jac jam tagfa (of traffic etc) jamb ystlysbost jambs ystlysbost jamming cloi janizary Janisariad jap silk sidan jap jap silks sidan jap jar jar jargon jargon jargons jargon jasper maen iasbis jaspers maen iasbis jaundice clefyd melyn jaundices clefyd melyn javelin gwaywffon javelin pass pàs gwaywffon javelins gwaywffon jaw genol jaw gên jaw safn jaw plate plât safn jaw plates plât safn jawbone genogl jawbones genogl jealous cenfigennus jealousy cenfigen jeans jîns jejunum jejwnwm jejunums jejwnwm jelly jeli jelly block bloc jeli jelly blocks bloc jeli jelly medium cyfrwng jeli jelly mediums cyfrwng jeli jelly-fish sglefren fôr jelly-fishs sglefren fôr jelly-like jelïaidd jemmy bar haearn cwta (=short crowbar) jenny callipers caliperau jenni jersey defnydd jersi jet jet (of water, steam etc) jet muchudd (stone) jet engine peiriant jet jet engines peiriant jet jet stream jetlif jet streams jetlif jetty glanfa jeweller gemydd jeweller's rouge rhuddliw gemydd jeweller's rouges rhuddliw gemydd jewellers gemydd jewellery gemwaith jewellery enamel enamel gemwaith jewellery enamels enamel gemwaith jib braich fawr (of crane) jib-headed key allwedd ben-gib jig jig jig jigio jig music cerddoriaeth jig jig musics cerddoriaeth jig jig rhyme rhythm jig jig rhymes rhythm jig jig saw herclif jig saws herclif jigger jiger jiggers jiger jigsaw cut toriad herclif jigsaw cuts toriad herclif jigsaw puzzle pos jigso jigsaw puzzles pos jigso jingle tincial jingle tincialyn jingles tincialyn jingoism jingoistiaeth jingoisms jingoistiaeth jink ochrgamu job gorchwyl (=task) job gwaith (=work) job swydd (=occupation) job applicant ymgeisydd am swydd job applicants ymgeisydd am swydd job creation scheme cynllun creu gwaith job creation schemes cynllun creu gwaith job description disgrifiad swydd job descriptions disgrifiad swydd job interview cyfweliad am swydd job interviews cyfweliad am swydd job placement lleoliad mewn swydd job placements lleoliad mewn swydd job production cynhyrchu yn ôl y gwaith job related ynglŷn â'r gwaith job satisfaction bodlonrwydd swydd job satisfactions bodlonrwydd swydd job specification manyleb swydd job specifications manyleb swydd job stream llif gorchwylion job streams llif gorchwylion job turnaround gweithdroad job turnarounds gweithdroad job vacancy swydd wag jobber's drill dril jobwr jobber's drills dril jobwr jockey joci jog loncian join uniad join uno join in the worship ymuno yn yr addoliad join lace uno les join together cysylltu â'i gilydd joiner asiedydd joiner's brad hoelen saer joiner's brads hoelen saer joiners asiedydd joinery gwaith asiedydd joining stitch pwyth uno joining stitches pwyth uno joins uniad joint cymal (in body) joint cymalu (=divide into joints) joint uniad (in object) joint uniadu (=connect by joints) joint account cyfrif ar y cyd joint accounts cyfrif ar y cyd joint and several cyd ac unigol joint and several liability atebolrwydd ar y cyd ac yn unigol joint distribution function ffwythiant cyd-ddosbarthiad joint distribution functions ffwythiant cyd-ddosbarthiad joint honours degree gradd gydanrhydedd joint honours degrees gradd gydanrhydedd joint liability cydatebolrwydd joint project cywaith joint projects cywaith joint replacement amnewid cymal joint replacements amnewid cymal joint stock company cwmni cydgyfalaf joint variation cydamrywiad joint variations cydamrywiad jointed cymalog jointed arm braich gymalog jointed arms braich gymalog jointed figure ffigur cymalog jointed figures ffigur cymalog jointed leg coes gymalog jointed legs coes gymalog jointed marionette marionét cymalog jointed marionettes marionét cymalog jointed puppet pyped cymalog jointed puppets pyped cymalog joints cymal (in body) joints uniad (in object) joist dist joists dist jongleur jongleur jongleurs jongleur joule joule (J) joules joule (J) journalism newyddiaduriaeth journalisms newyddiaduriaeth journalist newyddiadurwr journalists newyddiadurwr journey taith journeyman jermon journeymans jermon joust ymryson twrnamaint jousts ymryson twrnamaint joystick ffon reoli joysticks ffon reoli jubilant gorfoleddus judge barnwr judge beirniad (in sports) judgement dyfarniad (of tribunal etc) judgement of performance barnu perfformiad judgements dyfarniad (of tribunal etc) judges barnwr judges beirniad (in sports) judges' law cyfraith llys judges' laws cyfraith llys judicature barnweiniad judicatures barnweiniad judicial cyfreithiol judicial body corff barnwriaethol judicial power pŵer barnwrol judicial powers pŵer barnwrol judicial precedent cynsail farnwrol judicial precedents cynsail farnwrol judiciary barnwriaeth jug jwg juggle jyglo juggle the ball jyglo'r bêl juggler jyglwr jugglers jyglwr jugular vein gwythïen y gwddf jugular veins gwythïen y gwddf juice sudd juices sudd jumbo print argraffu jymbo jump naid jump neidio jump ball cydnaid jump balls cydnaid jump for the ball neidio am y bêl jump instruction cyfarwyddyd neidio jump instructions cyfarwyddyd neidio jump suit siwt undarn jump suits siwt undarn jump table tabl neidiau jump tables tabl neidiau jump with a rebound naid ac adlam jumper neidiwr (of person) jumper siwmper (of garment) jumpers neidiwr (of person) jumpers siwmper (of garment) jumping pit pwll neidio jumping pits pwll neidio jumps naid junction cydiad (of pipes etc) junction cyffordd (of roads, railways) junction cymer (of rivers / glaciers) junction cyswllt (of point of joining) junction cysylltle (in physics, chemistry) junction box blwch cyswllt junction boxes blwch cyswllt junctions cydiad (of pipes etc) junctions cyffordd (of roads, railways) junctions cymer (of rivers / glaciers) junctions cyswllt (of point of joining) junctions cysylltle (in physics, chemistry) juncus brwynen jungle jyngl jungles jyngl junior counsel barrister bargyfreithiwr ieuaf junior counsel barristers bargyfreithiwr ieuaf junior hacksaw haclif fach junior hacksaws haclif fach junior school ysgol gynradd junior schools ysgol gynradd junior secondary school ysgol iau junior secondary schools ysgol iau junior stage cyfnod cynradd junior stages cyfnod cynradd junk mail llythyrau sothach junk playground maes chwarae sbwriel junk playgrounds maes chwarae sbwriel jurassic jwrasig jurisdiction awdurdodaeth jurisdictions awdurdodaeth jurisprudence cyfreitheg jurisprudences cyfreitheg jurist arbenigwr cyfreithiol jurists arbenigwr cyfreithiol juror rheithiwr juror bias scale graddfa tuedd rheithiwr juror bias scales graddfa tuedd rheithiwr jurors rheithiwr jury rheithgor jury of presentment rheithgor cyflwyno just cyfiawn (=righteous) just prin (=barely) just clear prin glirio just in time mewn union bryd just in time production cynhyrchu mewn union bryd just miss prin osgoi just war rhyfel cyfiawn just wars rhyfel cyfiawn just world hypothesis damcaniaeth byd cyfiawn justice cyfiawnder (=justness) justice ustus (=judge) justice ynad (=magistrate) justice in eyre ustus cylch justice of gaol delivery ustus gwacáu'r carcharau justice of the quorum ustus cworwm justices cyfiawnder (=justness) justices ustus (=judge) justices ynad (=magistrate) justiciar prif ustus justiciars prif ustus justiciary gweinyddwr cyfiawnder justification cyfiawnhad (in general) justification unioniad (of lines of type) justification by faith cyfiawnhad drwy ffydd justifications cyfiawnhad (in general) justifications unioniad (of lines of type) justify cyfiawnhau (in general) justify unioni (lines of type) jut ymwthio allan jute jiwt jute canvas cynfas jiwt jutes jiwt jutting ymwthiol juvenile ifanc juvenile person ifanc juvenile court llys plant juvenile courts llys plant juvenile hormone hormon ieuangedd juvenile hormones hormon ieuangedd juvenile relief tirwedd ifanc juvenile reliefs tirwedd ifanc juveniles person ifanc juvenility ieuengrwydd juxtapose cyfosod juxtaposition cyfosodiad juxtapositions cyfosodiad kaccha kaccha kacchas kaccha kale cêl kame cnwc gro kame and kettle country tirlun cnwc a thegell kame moraine marian cnwc gro kame moraines marian cnwc gro kames cnwc gro kamma kamma (= karma) kammas kamma (= karma) kangaroo rat llygoden fawr godog kangaroo rats llygoden fawr godog kaolin caolin kaolins caolin kapellmeister kapellmeister kapellmeisters kapellmeister kapok capoc kapoks capoc kapparot kapparot karre clint karrenfeld calchbalmant karrenfelds calchbalmant karres clint karst carst karstic carstig karsts carst karyotype caryoteip karyotypes caryoteip kashrut kashrut kayak caiac kayaks caiac keel cilbren keels cilbren keen edge ymyl awchlym keen edged awchlym keen edges ymyl awchlym keep gorthwr (of castle) keep fit cadw'n heini keep one's balance cadw cydbwysedd keep order cadw trefn keep records cadw cofnodion keep wicket cadw wiced keep your head high cadw eich pen yn uchel keeper cadwrydd (on magnet) keeper ceidwad (in general) keepers cadwrydd (on magnet) keepers ceidwad (in general) keepers of our peace ceidwaid yr heddwch keeps gorthwr (of castle) kelvin celfin (K) kelvins celfin (K) kemp saethflew keratin ceratin keratins ceratin kerf llifdoriad kerfs llifdoriad kernel cnewyllyn kernels cnewyllyn kerosene cerosin kerosenes cerosin kersey cersi kesh / kes kesh / kes keto- ceto- ketone ceton ketones ceton kettle hole pwll tegell kettle holes pwll tegell key agoriad (of a switch) key allwedd (in general) key allweddol key bysell (on computer or typewriter) key cai (=cay) key cywair (=system of notes) key morthwyl tiwnio (for tuning piano) key nodyn (of a musical instrument) key age oedran allweddol key ages oedran allweddol key block bloc allwedd key blocks bloc allwedd key drift drifft allwedd key drifts drifft allwedd key field maes allweddol key fields maes allweddol key objective amcan allweddol key objectives amcan allweddol key press trawiad (keyboard) key principle egwyddor allweddol key principles egwyddor allweddol key ring torch allwedd key rings torch allwedd key signature arwydd cywair key signatures arwydd cywair key stage cyfnod allweddol key stages cyfnod allweddol key string cyweirdant key strings cyweirdant key strip stribed bysell key strips stribed bysell key stroke trawiad key strokes trawiad key vocabulary geirfa allweddol key word gair allweddol key words gair allweddol key worker gweithiwr allweddol key workers gweithiwr allweddol key-seat clamp clamp sedd glo key-seat clamps clamp sedd glo key-seat milling cutter melinwr sedd glo key-seat milling cutters melinwr sedd glo keyboard allweddellau (musical instrument) keyboard bysellfwrdd (of computer) keyboard drive gyrrwr bysellfwrdd keyboard drives gyrrwr bysellfwrdd keyboard instrument offeryn allweddellau keyboard instruments offeryn allweddellau keyboard layout cynllun bysellfwrdd keyboard layouts cynllun bysellfwrdd keyboards bysellfwrdd (of computer) keyed bysellog keyed joint uniad cloëdig keyed joints uniad cloëdig keyed mitre meitr clo keyed mitre joint uniad meitr clo keyed mitre joints uniad meitr clo keyed mitres meitr clo keyed tenon tyno cloëdig keyed tenons tyno cloëdig keyhole saw llif dwll clo keyhole saws llif dwll clo keying allweddu keynote cyweirnod keynote speaker prif siaradwr keynote speakers prif siaradwr keynotes cyweirnod keypad bysellbad keypads bysellbad keypunch tyllfwrdd keypunches tyllfwrdd keystone maen clo keystones maen clo keyway allweddfa keyword allweddair keywords allweddair khamsin camsin khamsins camsin khan khan khanate khanaeth khanates khanaeth khandha khandha (Pali = skandha Sanskrit) khandhas khandha (Pali = skandha Sanskrit) khans khan khurchatovium curchatofiwm (Kh) khurchatoviums curchatofiwm (Kh) kibbutz cibwts kibbutzes cibwts kick cic kick cicio kick ahead cic ymlaen kick aheads cic ymlaen kick for touch cic am ystlys kick pleat plet gic kick pleats plet gic kick-off cic gychwyn kick-offs cic gychwyn kickback ôl-gic kickbacks ôl-gic kicker pad cicio kickers pad cicio kicking strap strap gicio kicking straps strap gicio kicks cic kickwheel olwyn gic kickwheels olwyn gic kid croen myn (type of leather) kidnap herwgipio kidney aren kidney artery rhydweli arennol kidney beans ffa Ffrengig kidney shape arennog kidney tubule tiwbyn aren kidney tubules tiwbyn aren killed spirits gwirodydd tyner killer whale morfil danheddog killer whales morfil danheddog kiln odyn kiln furniture dodrefn odyn kiln seasoning sychu mewn odyn kiln shelf silff odyn kiln shelfs silff odyn kiln-dry odyn-sych kiln-dry odyn-sychu kilns odyn kilobyte cilobeit kilobytes cilobeit kilocalorie cilocalori kilocalories cilocalori kilocycle ciloseicl kilocycles ciloseicl kilogram cilogram (kg) kilograms cilogram (kg) kilometre cilometr (km) kilometres cilometr (km) kilowatt cilowat (kW) kilowatt hour cilowat awr (kW h) kilowatt hours cilowat awr (kW h) kilowatts cilowat (kW) kilt cilt kilts cilt kin perthynas kindred carennydd kindreds carennydd kinematics cinemateg kinesthetic cinesthetig kinetic cinetig kinetic art celfyddyd ginetig kinetic arts celfyddyd ginetig kinetic energy egni cinetig kinetic energy of translation egni cinetig trawsfudiad kinetic foci ffocysau cinetig kinetic order gradd ginetig kinetic orders gradd ginetig kinetic theory of gases damcaniaeth ginetig nwyon kinetics cineteg kinetin cinetin kinetins cinetin king brenin king post roof truss cwpl brenhinbost kingdom teyrnas kingdoms teyrnas kingpost brenhinbost kingposts brenhinbost kings brenin kingship brenhiniaeth kingships brenhiniaeth kink cinc kink cincio kinks cinc kinship perthynas kinships perthynas kiosk caban kiosks caban kirtan kirtan kirtans kirtan kiss of life cusan adfer kit cit kitchen cegin kitchen foil papur arian kitchen foils papur arian kitchen paper papur cegin kitchen papers papur cegin kitchen unit uned gegin kitchen units uned gegin kitchens cegin kite barcut kites barcut knead tylino knee pen-glin knee bracket braced pen-glin knee brackets braced pen-glin knee cap padell pen-glin knee caps padell pen-glin knee joint cymal y pen-glin knee joints cymal y pen-glin knee-jerk reflex atgyrch plwc pen-glin knee-jerk reflexes atgyrch plwc pen-glin kneel penlinio kneel sitting penlinio eistedd knees pen-glin knicker nicer knickers nicer knickpoint cnicyn knickpoints cnicyn knife cyllell knife blade llafn cyllell knife blades llafn cyllell knife edge arfin (in physics, chemistry) knife edge min cyllell (in general) knife edges arfin (in physics, chemistry) knife edges min cyllell (in general) knife file ffeil cyllell knife files ffeil cyllell knife handle carn cyllell knife handles carn cyllell knife pleat plet llafn knife pleats plet llafn knife stroke strôc gyllell knife strokes strôc gyllell knife tool cyllell (of lathe tools) knife tool erfyn cyllell knife tools cyllell (of lathe tools) knife tools erfyn cyllell knife-cut veneer argaen toriad cyllell knife-cut veneers argaen toriad cyllell knifes cyllell knight marchog knight errant marchog crwydrol knight errants marchog crwydrol knight's fee ffi marchog knight's fees ffi marchog knight's service gwasanaeth marchog knight's services gwasanaeth marchog knightage corff urddau'r marchogion knightages corff urddau'r marchogion knights marchog knit gwau knit two together gwau dau bwyth ynghyd knitted carpet carped wedi'i wau knitted carpets carped wedi'i wau knitted fabric ffabrig wedi'i wau knitted fabric darn craith ffabrig wedi'i wau knitted fabric darns craith ffabrig wedi'i wau knitted fabrics ffabrig wedi'i wau knitted lace les wedi'i wau knitted laces les wedi'i wau knitted textiles tecstilau wedi'u gwau knitting instructions cyfarwyddiadau gwau knitting machine peiriant gwau knitting machines peiriant gwau knitting needle gwaell knitting needles gwaell knitwear gweuwaith knitwears gweuwaith knob bwlyn knobs bwlyn knock down taro i lawr knock inhibitor atalydd cnocio knock inhibitors atalydd cnocio knock on taro ymlaen knock on trawiad ymlaen knock ons trawiad ymlaen knockdown fittings ffitiadau datgysylltiol knockdown furniture dodrefn datgysylltiol knocked up bottom gwaelod gweflog knocked up bottoms gwaelod gweflog knocking down iron haearn fflatio knocking down irons haearn fflatio knoll cnwc knolls cnwc knot cainc (in wood) knot clymu knot cuddio ceinciau (wood) knot cwlwm knot not (=measure of speed) knots cainc (in wood) knots cwlwm knots not (=measure of speed) knotted stitch pwyth clwm knotted stitches pwyth clwm knotting cuddio ceinciau knotting cuddiwr ceinciau knottings cuddiwr ceinciau knowledge gwybodaeth knowledge base cronfa wybodaeth knowledge bases cronfa wybodaeth knowledges gwybodaeth known concentration crynodiad diffiniedig known concentrations crynodiad diffiniedig knuckle cwgn (in anatomy) knuckle cymal (=hinge) knuckle joint uniad cymal knuckle joints uniad cymal knuckle thread edau gymal knuckle threads edau gymal knuckles cwgn (in anatomy) knuckles cymal (=hinge) knurl nwrl knurled grip gafael nwrl knurled grips gafael nwrl knurled nut nyten nwrl knurled nuts nyten nwrl knurled screw sgriw nwrl knurled screws sgriw nwrl knurling nwrlio (of lathe tools) knurling tools offer nwrlio (of lathe accessories) knurls nwrl kolkhoz colchos kolkhozes colchos kosher kosher kraal cral kraals cral kraft paper papur llwyd kraft papers papur llwyd krypton crypton (Kr) kryptons crypton (Kr) kulak cwlac kulaks cwlac kurtosis cwrtosis label label label labelu labelled wedi'i labelu labelled diagram diagram wedi'i labelu labelled diagrams diagram wedi'i labelu labelling paper papur labelu labelling papers papur labelu labelling scheme cynllun labelu labelling schemes cynllun labelu labelling theory damcaniaeth labelu labels label labial gwefusol labile ansefydlog labium labiwm labiums labiwm laboratory labordy laboratory experiment arbrawf labordy laboratory experiments arbrawf labordy laboratory test prawf labordy laboratory tests prawf labordy labour esgor (=process of childbirth) labour llafur labour charge costau llafur labour force gweithlu labour forces gweithlu labour market marchnad lafur labour market failure methiant marchnad lafur labour market failures methiant marchnad lafur labour markets marchnad lafur labour pains gwewyr esgor labour pool pŵl llafur labour pools pŵl llafur labour productivity cynhyrchaeth llafur labour saving arbed llafur labour stages camau geni labour turnover trosiant llafur labour turnovers trosiant llafur labour-intensive llafur-ddwys labour-intensive production cynhyrchu llafur-ddwys labour-saving device dyfais arbed gwaith labour-saving devices dyfais arbed gwaith labourer labrwr labourers labrwr labours llafur labrum labrwm labrums labrwm labyrinth labyrinth labyrinths labyrinth laccolith lacolith laccoliths lacolith lace carrai (thong) lace les lace beading gleinwaith les lace beadings gleinwaith les lace curtains llenni les lace insertion les wedi'i fewnosod lace insertions les wedi'i fewnosod lacemaking sideru lacerated wound clwyf rhwygiad lacerated wounds clwyf rhwygiad laceration rhwygiad lacerations rhwygiad laces carrai (thong) laces les lacquer lacr lacquer lacro lacquer finish gorffeniad lacr lacquer finishs gorffeniad lacr lacquer paint paent lacr lacquer paints paent lacr lacquer solvent hydoddydd lacr lacquer solvents hydoddydd lacr lacquering lacro (in finishing metal) lacquers lacr lacrimal duct dwythell ddagrau lacrimal ducts dwythell ddagrau lacrimatory peri dagrau lactase lactas lactases lactas lactate lactad lactate llaetha lactates lactad lactation llaethiad lactation period cyfnod llaetha lactation periods cyfnod llaetha lactations llaethiad lacteal lacteal lacteals lacteal lactogenic hormone hormon lactogenig lactogenic hormones hormon lactogenig lactophenol lactoffenol lactophenols lactoffenol lactose lactos lactose intolerance anoddefgarwch lactos lactose intolerances anoddefgarwch lactos lactoses lactos lacuna ceudod lacunary bylchus lacunas ceudod lacustrine llynnol ladder rhediad (in tights) ladder ysgol (for climbing) ladder logic rhesymeg ysgol ddringo ladder logics rhesymeg ysgol ddringo ladder rung ffon ysgol ladder rungs ffon ysgol ladders rhediad (in tights) ladders ysgol (for climbing) ladies chain cadwyn y merched ladies chains cadwyn y merched ladle lletwad ladles lletwad lady's slipper orchid tegeirian esgid Fair lady's slipper orchids tegeirian esgid Fair lag lagio (=wrap up) lag oediad (of time) lag and lead dilyn ac arwain lag deposits ôl-ddyddodion lag phase cyfnod oedi (bacteria) lag phases cyfnod oedi (bacteria) laggard ymdröwr (in geography) lagged ynysedig lagging ynysydd laggings ynysydd lagoon lagŵn lagoons lagŵn lair gwâl lairs gwâl laissez-faire leader arweinydd laissez-faire laissez-faire leaders arweinydd laissez-faire laissez-faire model model laissez-faire laissez-faire models model laissez-faire laity lleygwyr lake llyn lake dwelling crannog lake dwellings crannog lake head delta delta penllyn lake head deltas delta penllyn lake plateau llwyfandir llynnoedd lake plateaus llwyfandir llynnoedd lakes llyn lakeside delta delta glanllyn lakeside deltas delta glanllyn lamb's wool mop mop gwlân oen lamb's wool mops mop gwlân oen lamina lamina (in general) lamina llafn deilen (in botany) laminar laminaidd laminar flow llif laminaidd laminar flows llif laminaidd laminarin laminarin laminarins laminarin laminas lamina (in general) laminas llafn deilen (in botany) laminate laminedig laminate laminiad laminate laminiadu laminate joint uniad laminiad laminate joints uniad laminiad laminated laminedig laminated core craidd laminedig laminated cores craidd laminedig laminates laminiad laminboard astell lafnog laminboards astell lafnog lamp lamp lamp black du lamp lamp blacks du lamp lamps lamp lampshade cysgod lamp lampshades cysgod lamp lance gwaywffon lance corporal is-gorporal lance corporals is-gorporal lancer gwaywr lancers gwaywr lances gwaywffon lancet arch bwa lanset lancet arches bwa lanset land glan (drill part) land glanio land tir land agent stiward tir land agents stiward tir land animal anifail tir land animals anifail tir land breeze awel o'r tir land breezes awel o'r tir land enclosures cau tiroedd land question pwnc y tir land questions pwnc y tir land surveyor syrfëwr tir land surveyors syrfëwr tir land tenure tirddaliadaeth land tenures tirddaliadaeth land use defnydd tir land uses defnydd tir land utilization map map defnydd tir land utilization maps map defnydd tir landed gentry bonedd landes rhostir landform tirffurf landforms tirffurf landing glanio (on land) landing pen grisiau (=top of stairs) landing area ardal lanio landing areas ardal lanio landing strip llain lanio landing strips llain lanio landings pen grisiau (=top of stairs) landlocked tirgaeedig landlord perchennog landlordism landlordiaeth landlordisms landlordiaeth landlords perchennog landmark tirnod landmarks tirnod landmass ehangdir landowner tirfeddiannwr landowners tirfeddiannwr landownership tirfeddiannaeth landownerships tirfeddiannaeth lands glan (drill part) lands tir landscape tirlun (in art) landscape tirwedd (geographical) landscape consultant ymgynghorydd tirwedd landscape consultants ymgynghorydd tirwedd landscape features nodweddion tirwedd landscape painting paentiad tirlun (of painted picture) landscape painting peintio tirlun (of process or art) landscape paintings paentiad tirlun (of painted picture) landscapes tirlun (in art) landscapes tirwedd (geographical) landslide tirlithriad landslides tirlithriad landward tua'r tir lane lôn lanes lôn langar langar langars langar language iaith language ability gallu ieithyddol language centre canolfan iaith language centres canolfan iaith language development datblygiad iaith language developments datblygiad iaith language disorder anhwylder iaith language disorders anhwylder iaith language experience profiad iaith language experiences profiad iaith language formation ffurfiad iaith language formations ffurfiad iaith language interaction rhyngweithiad iaith language interactions rhyngweithiad iaith language laboratory labordy iaith language learning dysgu iaith language learnings dysgu iaith language of art iaith weledol celf language skills sgiliau iaith language test prawf iaith language tests prawf iaith languages iaith lantern llusern lanterns llusern lanthanum lanthanwm (La) lanthanums lanthanwm (La) lap lap lap lapio lap scorer rhifwr lapiau lap scorers rhifwr lapiau lap seam sêm lap lap seams sêm lap lapel llabed lapel badge bathodyn lapél lapel badges bathodyn lapél lapels llabed lapiaz calchbalmant lapiazes calchbalmant lapidary lapidari lapie clint lapies clint lapilli lapili lapillis lapili lapis blue glas lapis (enamelling colour) lapis blues glas lapis (enamelling colour) lapped butt joint goruniad bôn ac ysgwydd lapped butt joints goruniad bôn ac ysgwydd lapped dovetail joint goruniad cynffonnog lapped dovetail joints goruniad cynffonnog lapped joint goruniad lapped joints goruniad lapped seam sêm drosblyg lapped seams sêm drosblyg lapping goruniad lapping cane gwialen blethu lapping canes gwialen blethu lapping line llinell goruniad lapping lines llinell goruniad lappings goruniad lapse rate cyfradd newid lapse rates cyfradd newid laptop gliniadur (computer) laptops gliniadur (computer) larceny lladrad lard bloneg lard blonegu lard oil olew lard lard oils olew lard lards bloneg large apparatus offer mawr large cabbage white glöyn gwyn mawr large cabbage whites glöyn gwyn mawr large court cwrt mawr large courts cwrt mawr large face milling cutter melinwr wyneb mawr large face milling cutters melinwr wyneb mawr large intestine coluddyn mawr large intestines coluddyn mawr large print book llyfr print bras large print books llyfr print bras large scale graddfa fawr large scale integration cyfannu graddfa eang (LSI) large scales graddfa fawr large triangle triongl mawr large triangles triongl mawr large-scale ar raddfa fawr large-scale production cynhyrchu ar raddfa fawr larva larfa larvas larfa larynx laryncs larynxes laryncs laser laser laser alignment equipment offer alinio gyda laser laser beam pelydr laser laser beams pelydr laser laser printer argraffydd laser laser printers argraffydd laser laser scanner sganiwr laser laser scanners sganiwr laser laser store storfa laser laser stores storfa laser lasers laser last Ice Age Oes Iâ ddiwethaf last in-first out olaf i mewn-cyntaf allan (LIFO) last in-first outs olaf i mewn-cyntaf allan (LIFO) last step cam olaf last steps cam olaf latch clicied latches clicied late adolescence llencyndod hwyr late adolescences llencyndod hwyr late adopter mabwysiadwr hwyr late adopters mabwysiadwr hwyr late cut toriad hwyr late cuts toriad hwyr late developer datblygwr hwyr late developers datblygwr hwyr late development datblygiad diweddar late developments datblygiad diweddar late maturity aeddfedrwydd diweddar latecomer hwyrddyfodiad latecomers hwyrddyfodiad latency cuddni latent cudd latent heat gwres cudd latent heat capacity cynhwysedd gwres cudd latent heat of fusion gwres cudd ymdoddi latent heat of vaporization gwres cudd anweddu latent heats gwres cudd latent period cyfnod diddigwydd (nerve / muscle) latent periods cyfnod diddigwydd (nerve / muscle) lateral ochrol lateral adjustment cymhwysiad ochrol lateral adjustment lever lifer cymhwyso ochrol lateral adjustment levers lifer cymhwyso ochrol lateral adjustments cymhwysiad ochrol lateral bud blaguryn ochrol lateral buds blaguryn ochrol lateral dominance trechedd ochrol lateral dominances trechedd ochrol lateral exercise ymarfer ochrol lateral exercises ymarfer ochrol lateral force grym ochrol lateral forces grym ochrol lateral hazard llestair ochrol lateral hazards llestair ochrol lateral inversion gwrthdroad ochrol lateral inversions gwrthdroad ochrol lateral joint uniad ochrol lateral joints uniad ochrol lateral line llinell ochrol lateral lines llinell ochrol lateral moraine marian ochrol lateral moraines marian ochrol lateral root gwreiddyn ochrol lateral roots gwreiddyn ochrol lateral surfaces arwynebau ochrol lateral view ochrolwg lateral views ochrolwg laterite laterit laterites laterit lateritic lateritig laterization latereiddio laterized latereiddiedig latex latecs latex mould mowld latecs latex moulds mowld latecs latexes latecs lath latsen lathe turn lathe accessories cyfarpar turn lathe centre canol turn lathe centres canol turn lathe chisel cŷn turnio lathe chisels cŷn turnio lathe gouge gaing gau turn lathe gouges gaing gau turn lathe parts rhannau'r turn lathe saddle cyfrwy turn lathe saddles cyfrwy turn lathe tools offer turn lather seboni lather trochion sebon lather stabilizer sefydlogydd trochion lather stabilizers sefydlogydd trochion lathes turn lathework gwaith turn latheworks gwaith turn laths latsen latitude lledred latitudes lledred latitudinarian eang-gredwr latitudinarianism eang-grededd latitudinarianisms eang-grededd latitudinarians eang-gredwr lattice dellten lattice breaking enthalpy enthalpi torri dellt lattice energy egni dellt lattice formation ffurfiant dellt lattice formations ffurfiant dellt lattice space gofod dellt lattice spaces gofod dellt lattice work delltwaith lattice works delltwaith lattices dellten latus-rectum latws-rectwm latus-rectums latws-rectwm laudanum lodnwm laudanums lodnwm lauds moliannau launch cychwyn (an attack) launch lansio (a boat) launder golchi a smwddio launderette golchfa launderettes golchfa laundress golchwraig laundry golchdy laundry appliances offer golchwaith lava lafa lava block bloc lafa lava blocks bloc lafa lava cone côn lafa lava cones côn lafa lava flow llif lafa lava flows llif lafa lava outflow gorlif lafa lava outflows gorlif lafa lava spine nodwydd lafa lava spines nodwydd lafa lavant lafant lavants lafant lavas lafa lavatory brush brwsh tŷ bach lavatory brushs brwsh tŷ bach lavender blue glas lafant (enamelling colour) lavender blues glas lafant (enamelling colour) law cyfraith (as a system) law deddf (=a single law) law and order cyfraith a threfn law book llyfr y gyfraith law books llyfr y gyfraith law code cod cyfraith law codes cod cyfraith law of absorption deddf amsugniad law of complementation deddf gyflenwadol law of conservation of mass deddf cadwraeth màs law of constant composition deddf cyfansoddiad cyson law of diminishing returns deddf adenillion lleihaol law of gravitation deddf disgyrchiant law of gravity deddf disgyrchiant law of mass action deddf adweithio masau law of multiple motions deddf mudiannau lluosol law of multiple proportions deddf cyfraneddau lluosol law of retail gravitation deddf disgyrchiant adwerthol law of succession cyfraith etifeddu law reform diwygio'r gyfraith lawbreaking torcyfraith lawbreakings torcyfraith lawday diwrnod llys barn lawful cyfreithlon lawgiver deddfroddwr lawgivers deddfroddwr lawn lawnt lawn cotton cotwm main lawn cottons cotwm main lawning rhidyllu lawns lawnt lawrencium lawrenciwm (Lr) lawrenciums lawrenciwm (Lr) laxative carthydd laxatives carthydd lay cân lay gosod (table) lay lleyg lay brother brawd lleyg lay brothers brawd lleyg lay figure ffigur gosod lay figures ffigur gosod lay out a pattern gosod patrwm lay-in mewn-osod layback ôl-gripian layer haen layer haenu layer colouring haenliwio layered structure adeiledd haenog layered structures adeiledd haenog layers haen layette layette layettes layette laying up gosod haenau laying-on rhagliwio (of colour) layman lleygwr laymans lleygwr layout dyluniad (=design) layout gosodiad (of page) layout feature nodwedd gosodiad layout features nodwedd gosodiad layout grid grid cynllun layout grids grid cynllun layouts dyluniad (=design) layouts gosodiad (of page) lazy daisy stitch pwyth llygad y dydd lazy daisy stitches pwyth llygad y dydd lazy eye llygad diog lazy eyes llygad diog leach trwytholchi leaching trwytholchiad leachings trwytholchiad lead arwain (=guide) lead blaenu (in orchestra) lead lid (electrical) lead plwm (Pb) lead blocks blociau plwm lead body corff arweiniol lead bronze efydd plwm lead bronzes efydd plwm lead bush bwsh plwm lead bushs bwsh plwm lead down arwain i lawr lead flashing lapiad plwm lead flashings lapiad plwm lead glaze gwydredd plwm lead glazes gwydredd plwm lead paragraph paragraff agoriadol lead paragraphs paragraff agoriadol lead professional officer swyddog proffesiynol arweiniol lead professional officers swyddog proffesiynol arweiniol lead screw sgriw dywys (lathe part) lead screw bearing beryn sgriw dywys lead screw bearings beryn sgriw dywys lead screws sgriw dywys (lathe part) lead sculpture cerflunwaith plwm lead sculptures cerflunwaith plwm lead solder sodr plwm lead solders sodr plwm lead story prif stori lead teacher athrawes arweiniol (female) lead teacher athro arweiniol (male) lead teachers athrawes arweiniol (female) lead teachers athro arweiniol (male) lead up arwain i fyny lead-free di-blwm leaded window ffenestr blwm leaded windows ffenestr blwm leader arweinydd (in general) leader blaenwr (in orchestra) leaders arweinydd (in general) leaders blaenwr (in orchestra) leadership arweinyddiaeth leaderships arweinyddiaeth leading edge blaenymyl leading leg coes flaen leading legs coes flaen leading seventh seithfed arweiniol leading sevenths seithfed arweiniol leading tray hambwrdd gosod (mosaics) leads lid (electrical) leads plwm (Pb) leaf dalen (of paper) leaf deilen (of plant) leaf green gwyrdd y ddeilen leaf greens gwyrdd y ddeilen leaf mosaic mosaig dail leaf mosaics mosaig dail leaf node cwgn deilen leaf nodes cwgn deilen leaf print print deilen leaf prints print deilen leaf scar craith deilen leaf scars craith deilen leaf shaped arrowhead pen saeth ar ffurf deilen leaf shaped arrowheads pen saeth ar ffurf deilen leaf stitch pwyth deilen leaf stitches pwyth deilen leaf trace deildres leaf traces deildres leaf-eating insects pryfed deilysol leaflet deiliosen (=small leaf) leaflet taflen (of paper) leaflet cover clawr taflen leaflet covers clawr taflen leaflets deiliosen (=small leaf) leaflets taflen (of paper) leafs dalen (of paper) leafs deilen (of plant) leafy deiliog leafy shoot brigyn deiliog leafy shoots brigyn deiliog league cynghrair league table tabl cynghrair league tables tabl cynghrair leagues cynghrair leakage current cerrynt gollwng leakage currents cerrynt gollwng lean gwyro lean meat cig coch lean meats cig coch lean paint paent tenau lean paints paent tenau lean pigment pigment tenau lean pigments pigment tenau lean production cynhyrchu main lean-to roof to ar oledd lean-to roofs to ar oledd leap llam leap llamu leap frog llam llyffant leap frogs llam llyffant leap year blwyddyn naid leap years blwyddyn naid leaps llam learn dysgu learner dysgwr learners dysgwr learning dysg learning centre canolfan dysgu learning centres canolfan dysgu learning difficulty anhawster dysgu learning disability anabledd dysgu learning materials deunyddiau dysgu learning method dull dysgu learning methods dull dysgu learning plateau gwastad dysgu learning plateaus gwastad dysgu learning resource adnodd dysgu learning resources adnodd dysgu learning style arddull dysgu learning styles arddull dysgu learnings dysg lease prydles lease rhentu ar brydles leased line connection cysylltiad llinell ar log leased line connections cysylltiad llinell ar log leasehold prydlesol leasehold reform diwygio cyfraith prydlesi leaseholder prydleswr leaseholders prydleswr leases prydles least lleiaf least significant bit did lleiaf arwyddocaol (LSB) least significant bits did lleiaf arwyddocaol (LSB) least square line llinell sgwariau lleiaf least square lines llinell sgwariau lleiaf least-squares estimate amcangyfrif swm lleiaf sgwariau least-squares estimates amcangyfrif swm lleiaf sgwariau leather lledr leather apron ffedog ledr leather aprons ffedog ledr leather ball pêl ledr leather balls pêl ledr leather cloth lliain lledr leather cloths lliain lledr leather hammer morthwyl lledr leather hammers morthwyl lledr leather joint cymal lledr leather joints cymal lledr leather mallet gordd ledr leather mallets gordd ledr leather needle nodwydd lledr leather needles nodwydd lledr leather punch tyllydd lledr leather punches tyllydd lledr leather thong carrai ledr leather thongs carrai ledr leather washer wasier ledr leather washers wasier ledr leather webbing webin lledr leather webbings webin lledr leathers lledr lecithin lecithin lecithins lecithin lectern darllenfa lecterns darllenfa lectionary llithlyfr lecture darlith lecture theatre darlithfa lecture theatres darlithfa lecturer darlithydd lecturers darlithydd lectures darlith ledge ysgafell ledged and braced ysgafellog a chleddog ledged door drws ysgafellog ledged doors drws ysgafellog ledger cyfriflyfr (in accounting) ledger planc (=plank) ledger polyn llorwedd (in scaffolding) ledger line llinell estyn ledger lines llinell estyn ledgers cyfriflyfr (in accounting) ledgers planc (=plank) ledgers polyn llorwedd (in scaffolding) ledges ysgafell lee boards byrddau'r tu clytaf lee side of ice ochr wrthrew leech gelen leeches gelen leeward cysgodol leeward side ochr gysgodol leeward sides ochr gysgodol left chwith left arm bowling bowlio braich chwith left court cwrt chwith left courts cwrt chwith left cross chwith draws left eye llygad chwith left eyes llygad chwith left foot troed chwith left foots troed chwith left hand llaw chwith left hands llaw chwith left outfielder ffildiwr chwith left outfielders ffildiwr chwith left over food bwyd dros ben left pedal pedal chwith left pedals pedal chwith left shift syfliad chwith left shifts syfliad chwith left side ochr chwith left side of the court ochr chwith y cwrt left sides ochr chwith left wing asgell chwith (in sport) left wings asgell chwith (in sport) left-half hanerwr chwith left-halfs hanerwr chwith left-hand lock clo llaw chwith left-hand locks clo llaw chwith left-hand screw sgriw llaw chwith left-hand screw thread edau sgriw llaw chwith left-hand screw threads edau sgriw llaw chwith left-hand screws sgriw llaw chwith left-hand side ochr chwith left-hand sides ochr chwith left-hand thread edau llaw chwith left-hand threads edau llaw chwith left-hand tools offer llaw chwith left-hand turn tro chwith left-hand turns tro chwith left-handed llawchwith left-handed batsman batiwr llaw chwith left-handed batsmans batiwr llaw chwith leg coes leg and rail construction adeiladwaith coes a rheilen leg and rail constructions adeiladwaith coes a rheilen leg before wicket coes o flaen wiced (l.b.w.) leg break bowling troi o'r goes leg bye heibiad coes leg byes heibiad coes leg glance cyffyrddiad coes leg glances cyffyrddiad coes leg of mutton sleeve llawes goes dafad leg side ochr goes leg sides ochr goes leg slip slip coes leg slips slip coes leg stump stwmp coes leg stumps stwmp coes leg vice feis goes leg vices feis goes leg-break troelliad ochr goes leg-breaks troelliad ochr goes legacy cymynrodd (=sum or article bequeathed) legacy etifeddiaeth (=inheritance) legal cyfreithiol legal aid cymorth cyfreithiol legal aids cymorth cyfreithiol legal capacity gallu cyfreithiol legal consequences goblygiadau cyfreithiol legal constraint cyfyngiad cyfreithiol legal constraints cyfyngiad cyfreithiol legal history hanes cyfraith legal liability atebolrwydd cyfreithiol legal position safbwynt cyfreithiol legal positions safbwynt cyfreithiol legal system system gyfreithiol legal systems system gyfreithiol legalism cyfreithyddiaeth legalisms cyfreithyddiaeth legality cyfreithlondeb legally binding cyfreithiol-rwym legate legad legates legad legend chwedl legends chwedl legibility darllenadwyaeth legible darllenadwy legion lleng legions lleng legislate deddfu legislation deddfwriaeth legislation for the construction project deddfwriaeth i'r project adeiladu legislations deddfwriaeth legislative assembly cynulliad deddfu legislative body corff deddfwriaethol legislator deddfwr legislators deddfwr legislature corff deddfwriaethol (=legislative body) legislature corff o ddeddfau (=body of laws) legislature senedd (=parliament) legislatures corff deddfwriaethol (=legislative body) legislatures corff o ddeddfau (=body of laws) legislatures senedd (=parliament) legitimacy cyfreithlondeb legitimate cyfreithlon legitimism cyfreithloniaeth legitimisms cyfreithloniaeth legitimist cyfreithlonydd legitimists cyfreithlonydd legume codlys legumes codlys leguminous codlysol legwarmers legins gweu leisure hamdden leisure and recreation hamdden ac adloniant leisure and recreation facility cyfleuster hamdden ac adloniant leisure and tourism hamdden a thwristiaeth leisure centre canolfan hamdden leisure centres canolfan hamdden leisure clothes dillad hamdden leisure time amser hamdden leisure times amser hamdden leisures hamdden lemiscate loop dolen lemnisgat lemiscate loops dolen lemnisgat lemma lema lemmas lema lemming leming lemmings leming lemon lemon lemon curd ceuled lemon lemon curds ceuled lemon lemons lemon lend-lease les-fenthyg lend-leases les-fenthyg lending rate cyfradd fenthyg lending rates cyfradd fenthyg length hyd length pwythyn (of thread) lengthen estyn lengthen llaesu (skirt etc) lengthen ymestyn lengthen a pattern estyn patrwm lengthening bars barrau ymestyn lengths hyd lengths pwythyn (of thread) lengthwise yn ei hyd lens power nerth lens (dioptre) lens powers nerth lens (dioptre) lenticel lenticel lenticel lenticelaidd lenticels lenticel lenticular lensaidd leptokurtic leptocwrtig leptotene leptoten leptotenes leptoten lesbian lesbiad lesbians lesbiad lesion nam lesions nam less economically developed countries gwledydd llai economaidd ddatblygedig (LEDCs) lessee prydleswr lessees prydleswr lesser spoken language iaith lai arferedig lesser spoken languages iaith lai arferedig lesson cyfres (=suite) lesson gwers (=instruction) lesson observation arsylwi gwersi lesson plan cynllun gwers lesson plans cynllun gwers lessons cyfres (=suite) lessons gwers (=instruction) let gosod (house) lethal marwol lethal gene genyn marwol lethal genes genyn marwol lethargic swrth letraset letraset letrasets letraset letter llythyr (=correspondence) letter llythyren (of alphabet) letter coordinates cyfesurynnau llythrennau letter plate plât llythyrau letter plates plât llythyrau lettering llythreniad lettering llythrennu lettering brush brwsh llythrennu lettering brushs brwsh llythrennu lettering chalk sialc llythrennu lettering chalks sialc llythrennu lettering nib nib llythrennu lettering nibs nib llythrennu lettering paper papur llythrennu lettering papers papur llythrennu lettering pen pen llythrennu lettering pencil pensil llythrennu lettering pencils pensil llythrennu lettering pens pen llythrennu lettering quill cwilsen lythrennu lettering quills cwilsen lythrennu lettering work gwaith llythrennu lettering works gwaith llythrennu letterings llythreniad letters llythyr (=correspondence) letters llythyren (of alphabet) letters of denizenship llythyrau dinasyddiaeth leucine lewcin leucines lewcin leucocyte lewcocyt leucocyte count cyfrifiad lewcocytau leucocyte counts cyfrifiad lewcocytau leucocytes lewcocyt leucoplast lewcoplast leucoplasts lewcoplast levee llifglawdd levees llifglawdd level gwastad level lefel level lefelu level bedded rocks creigiau llorhaenol level crossing croesfan wastad level crossings croesfan wastad level description disgrifiad lefel level descriptions disgrifiad lefel level of attainment lefel cyrhaeddiad level of difficulty lefel anhawster level over trosoli leveller lefelaidd levels lefel levels of demand lefelau'r galw levels of dental decay lefelau o bydredd dannedd levels of skill lefelau o fedrusrwydd lever lifer lever bar trosolfar lever bars trosolfar lever cap cap trosoli lever caps cap trosoli lever system system liferi lever systems system liferi lever tools offer trosoli lever-frame fretsaw llif ffret lifer lever-frame fretsaws llif ffret lifer leverage trosoledd (principle of) leverage trosoliad (act of) leverages trosoledd (principle of) leverages trosoliad (act of) levers lifer levy ardoll (in finance) levy treth (in general) levy rates codi trethi lexical geiriadurol lexical analysis dadansoddiad geiriadurol lexicographic geiriadurol ley gwndwn ley farming ffermio gwndwn liability atebolrwydd liana liana lianas liana libel enllib libels enllib liberal rhyddfrydwr liberal Tory Tori rhyddfrydol liberal Toryism Torïaeth ryddfrydol liberal democrat democrat rhyddfrydol liberal democrat democrataidd rhyddfrydol liberal democrats democrat rhyddfrydol liberal empire ymerodraeth ryddfrydol liberal empires ymerodraeth ryddfrydol liberalisation rhyddfrydoli liberalism rhyddfrydiaeth liberalisms rhyddfrydiaeth liberals rhyddfrydwr liberate rhyddhau liberation rhyddhad liberation theology diwinyddiaeth rhyddhad liberations rhyddhad liberator rhyddhäwr liberators rhyddhäwr libertarian rhyddewyllyswr libertarians rhyddewyllyswr liberty libart (=domain or property) liberty rhyddid (=freedom) liberty of conscience rhyddid cydwybod libido libido librarian llyfrgellydd librarians llyfrgellydd library llyfrgell library program rhaglen lyfrgell library programs rhaglen lyfrgell library resource centre canolfan adnoddau llyfrgell library resource centres canolfan adnoddau llyfrgell library routine rheolwaith llyfrgell library routines rheolwaith llyfrgell library sub-routine is-reolwaith llyfrgell library sub-routines is-reolwaith llyfrgell libration mantoliad librations mantoliad librettist libretydd librettists libretydd libretto libreto lice llau licence penrhyddid (=absolute freedom) licence rhyddid (=freedom) licence trwydded (=permit) licenced premises tŷ trwyddedig licences penrhyddid (=absolute freedom) licences rhyddid (=freedom) licences trwydded (=permit) lichen cen lichenometry cenfetreg lichens cen lid clawr lido traeth ymdrochi lie gorweddiad liege-lord uwch-arglwydd liege-lords uwch-arglwydd lieutenant is-gapten lieutenant governor dirprwy lywodraethwr lieutenant governors dirprwy lywodraethwr lieutenant-colonel is-gyrnol lieutenant-colonels is-gyrnol lieutenant-general is-gadfridog lieutenant-generals is-gadfridog lieutenants is-gapten life after death bywyd ar ôl marwolaeth life after deaths bywyd ar ôl marwolaeth life assurance aswiriant bywyd life assurances aswiriant bywyd life crisis argyfwng bywyd life cycle cylchred bywyd (in biology) life cycle cylchred oes (in economics) life cycles cylchred bywyd (in biology) life cycles cylchred oes (in economics) life drawing bywluniad life drawings bywluniad life expectancy disgwyliad oes life experiences profiadau bywyd life insurance yswiriant bywyd life insurances yswiriant bywyd life jacket siaced achub life jackets siaced achub life process proses bywyd life skills sgiliau byw life span rhychwant oes life span experiment arbrawf goroesi life span experiments arbrawf goroesi life spans rhychwant oes life stage cam bywyd life stages cam bywyd life-peer arglwydd am oes life-peers arglwydd am oes life-saving achub bywyd life-saving leg kick cic achub bywyd life-saving leg kicks cic achub bywyd life-sentence dedfryd am oes life-sentences dedfryd am oes life-size gwir faint life-size proportion cyfrannedd maint iawn life-size proportions cyfrannedd maint iawn life-sizes gwir faint lifelike real lifestyle ffordd o fyw lifestyle factors affecting health ffactor ffordd o fyw sy'n effeithio ar iechyd lifestyle factors affecting healths ffactor ffordd o fyw sy'n effeithio ar iechyd lifestyles ffordd o fyw lifetime hyd oes lifetimes hyd oes lift codi lift codiad lift pump pwmp codi lift pumps pwmp codi lift the body codi'r corff lifting tongs gefel godi lifts codiad ligado ligado ligament gewyn ligamentous gewynnol ligaments gewyn ligand ligand ligands ligand ligation clymu ligature cwlwm (in general) ligature cysylltnod (in plainsong) ligature rhwymyn (for clarinet) ligatures cwlwm (in general) ligatures cysylltnod (in plainsong) ligatures rhwymyn (for clarinet) light golau (=illumination) light golau (in colour) light goleuni (=natural agent that stimulates sight) light goleuo (=illuminate) light ysgafn (of weight) light and shade tywyll a golau light breeze awel ysgafn light breezes awel ysgafn light brown brown golau (enamelling colour) light browns brown golau (enamelling colour) light colour lliw golau light colours lliw golau light damping gwanychiad ysgafn light dampings gwanychiad ysgafn light duty detergent glanedydd ysgafn light duty detergents glanedydd ysgafn light fast pigment pigment golau anniflan light fast pigments pigment golau anniflan light fittings ffitiadau goleuo light heavy weight pwysau go drwm light industry diwydiant ysgafn light microscope microsgop golau light microscopes microsgop golau light oil olew tenau light oils olew tenau light opera opera ysgafn light operas opera ysgafn light pen pen golau light pens pen golau light plastic ball pêl blastig ysgafn light plastic balls pêl blastig ysgafn light pulley pwli ysgafn light racket raced ysgafn light rackets raced ysgafn light reaction adwaith golau light reactions adwaith golau light red coch golau light reds coch golau light ruby rhuddgoch golau (enamelling colour) light source ffynhonnell goleuni light sources ffynhonnell goleuni light straw melyn golau (tempering colour) light straws melyn golau (tempering colour) light string llinyn ysgafn light strings llinyn ysgafn light tone tôn golau (of colour) light tones tôn golau (of colour) light turning turnio ysgafn (of lathe tools) light weight pwysau ysgafn light year blwyddyn golau light years blwyddyn golau light-chaser effect effaith erlid-golau light-chaser effects effaith erlid-golau light-dependent golau-ddibynnol light-dependent resistor gwrthydd goleuni-ddibynnol (LDR) light-dependent resistors gwrthydd goleuni-ddibynnol (LDR) light-independent golau-annibynnol light-sensitive cell cell oleusensitif light-sensitive cells cell oleusensitif lightening ysgafnhad (of weight) lightenings ysgafnhad (of weight) lighthouse goleudy lighthouse in use and disused goleudy yn gweithio, yn segur lighthouses goleudy lights golau (=illumination) lights goleuni (=natural agent that stimulates sight) lightship goleulong lightships goleulong lightweight ysgafn ligneous lignaidd lignification ligneiddiad lignifications ligneiddiad lignify ligneiddio lignin lignin lignins lignin lignite lignit lignites lignit like charge gwefr debyg like charges gwefr debyg likelihood tebygoliaeth likelihoods tebygoliaeth likely tebygol limb aelod (of body) limb braich (of cross) limb ystlys (structural) limbs aelod (of body) limbs braich (of cross) limbs ystlys (structural) lime calch lime deficiency prinder calch lime deficient prin o galch lime kiln odyn galch lime kilns odyn galch lime soap sebon calch lime soaps sebon calch lime water dŵr calch lime waters dŵr calch limepan cletir calch limepans cletir calch limes calch limestone calchfaen limestone kiln odyn galch limestone kilns odyn galch limestone pavement calchbalmant limestone pavements calchbalmant limestone pillar calchbost limestone pillars calchbost limestones calchfaen liminal trothwyol liming calchu limit cyfyngiad (on numbers etc) limit cyfyngu limit terfan (in physics and mathematics) limit terfyn (=boundary) limit gauge medrydd terfan limit gauges medrydd terfan limit of elasticity terfan elastigedd limit of proportionality terfan gyfrannol limit of tolerance terfan goddefiant limit on entry cyfyngiad ar gofnod (in electronic records) limit pricing prisio cyfyngol limitation cyfyngiad limitations cyfyngiad limitations of the method cyfyngiadau'r dull limited cyfyngedig limited company cwmni cyfyngedig (ltd.) limited liability atebolrwydd cyfyngedig limited movement symudiad cyfyngedig limited movements symudiad cyfyngedig limited vocal range cwmpas lleisiol cyfyngedig limited vocal ranges cwmpas lleisiol cyfyngedig limiting cyfyngol (in general) limiting terfannol (in physics and mathematics) limiting case achos terfannol limiting cases achos terfannol limiting conditions amodau cyfyngol limiting density dwysedd terfannol limiting factor ffactor gyfyngol limiting factors ffactor gyfyngol limits cyfyngiad (on numbers etc) limits terfan (in physics and mathematics) limits terfyn (=boundary) limits of visibility terfannau gwelediad limnology llynoleg limonite limonit limonites limonit limp cloffni limp llipa (=not stiff or firm) limps cloffni line lein (for railway, clothes etc) line llinell (=mark on a surface) line rhes (=row) line absorption spectrum sbectrwm amsugno llinell line absorption spectrums sbectrwm amsugno llinell line and wash llinell a golchiad line engraving ysgythriad llinell line engravings ysgythriad llinell line feed character nod llin-borthiad line feed characters nod llin-borthiad line feed key llinborthwr line filament lamp lamp ffilament llinell line filament lamps lamp ffilament llinell line fill llanw llinell line graph graff llinell line graphs graff llinell line in the rhyme llinell rhigwm line manager rheolwr llinell line managers rheolwr llinell line of best fit llinell ffit orau line of descent llinach line of enquiry trywydd ymholi line of force llinell grym line of intersection llinell croestoriad line of regression llinell atchwel line of symmetry llinell cymesuredd line of the ball llwybr y bêl line of the stump llwybr y stwmp line of the wicket llwybr y wiced line out lein line outs lein line printer llin-argraffydd line printers llin-argraffydd line space llinell gwagle line spaces llinell gwagle line spacing bylchiad llinellau line spacings bylchiad llinellau line spectrum sbectrwm llinell line spectrums sbectrwm llinell line stitch pwyth llinell line stitches pwyth llinell line under the stave gorlinell line under the staves gorlinell line up unioni (print, pictures etc) lineage llinach lineages llinach linear llinellog (=consisting of lines) linear llinol (involving one dimension only) linear composition cyfansoddiad llinol linear compositions cyfansoddiad llinol linear counterpoint gwrthbwynt llinellog linear counterpoints gwrthbwynt llinellog linear dependence dibyniaeth linol linear dependences dibyniaeth linol linear equation hafaliad llinol linear equations hafaliad llinol linear factor ffactor linol linear factors ffactor linol linear flow llif llinol linear flows llif llinol linear independence annibyniaeth linol linear independences annibyniaeth linol linear materials defnyddiau llinol linear measurement mesuriadau llinol linear momentum momentwm llinol linear momentums momentwm llinol linear motion mudiant llinol linear motions mudiant llinol linear movement symudiad llinol linear movements symudiad llinol linear narrative stori linellol linear narratives stori linellol linear programming rhaglennu llinol linear regression atchwel llinol linear regressions atchwel llinol linear velocity cyflymder llinol linearity llinoledd linearly dependent llinol ddibynnol linearly independent llinol annibynnol lined in wedi'i leinio lined pocket poced wedi'i leinio lined pockets poced wedi'i leinio lined yoke iau â leinin lined yokes iau â leinin linen lliain linen basket basged ddillad linen baskets basged ddillad linen button botwm lliain linen buttons botwm lliain linen fold lliein-blyg linen scrim lliain sgrim linen scrims lliain sgrim linen thread edau lin linen threads edau lin linen-fold panel panel lliein-blyg linen-fold panels panel lliein-blyg linens lliain liner leiner liner train trên leiner liner trains trên leiner liners leiner lines lein (for railway, clothes etc) lines llinell (=mark on a surface) lines rhes (=row) lines of communication ffyrdd cyswllt lines of force llinellau grym lines of supply ffyrdd cyflenwi lines per minute llinellau y funud (lpm) linesman llumanwr linesman's flag lluman linesman's flags lluman linesmans llumanwr ling brenhinbysg lingerie lingerie lingeries lingerie lings brenhinbysg linguistic ieithyddol linguistic method dull ieithyddol linguistic methods dull ieithyddol linguistics ieithyddiaeth lining leinin lining tool erfyn llinellu lining tools erfyn llinellu lining wheel olwyn linellu lining wheels olwyn linellu linings leinin link cyswllt (of person or connecting thing) link cysylltu link dolen (=loop or ring of chain) link between voice and character cysylltiad rhwng y llais a'r cymeriad link between voice and characters cysylltiad rhwng y llais a'r cymeriad link button botwm cyswllt link buttons botwm cyswllt link for automatic feed dolen borthiant awtomatig link mechanism mecanwaith dolen link mechanisms mecanwaith dolen link polygon polygon cyswllt link polygons polygon cyswllt link simple skills cysylltu medrau syml link-edit cyswllt-olygu link-editor cyswllt-olygydd link-editors cyswllt-olygydd link-loader cyswllt-lwythydd link-loaders cyswllt-lwythydd linkage cysylltedd linkage editor golygydd cysylltedd linkage editors golygydd cysylltedd linkages cysylltedd linked group grŵp cysylltiedig linked groups grŵp cysylltiedig linked list rhestr gysylltiedig linked lists rhestr gysylltiedig linked sub-routine is-reolwaith cysylltiedig linked sub-routines is-reolwaith cysylltiedig linker cysylltwr linkers cysylltwr links cyswllt (of person or connecting thing) links dolen (=loop or ring of chain) lino leino lino cut torlun leino lino cuts torlun leino lino cutter torrell leino lino cutters torrell leino lino cutting nib nib torri leino lino cutting nibs nib torri leino lino knife cyllell leino lino knifes cyllell leino lino print print leino lino printing printio leino lino prints print leino lino roller rholer leino lino rollers rholer leino lino-block printing printio bloc leino lino-printing ink inc printio leino lino-printing inks inc printio leino linoleum linoliwm linoleums linoliwm linseed oil olew had llin linseed oils olew had llin linson linson linsons linson lintel capan drws lintels capan drws lip gosod ymyl lip gwefus (drill part) lip min (corrie) lip clearance angle ongl cliriad gwefus (drill part) lip clearance angles ongl cliriad gwefus (drill part) lip reading darllen gwefusau lipase lipas lipases lipas lipid lipid lipid molecule moleciwl lipid lipid molecules moleciwl lipid lipids lipid lipogenesis lipogenesis lipoid lipoid lipoids lipoid lipotropy lipotropi lipped edge ymyl osod lipped edges ymyl osod liquefaction hylifiad liquefactions hylifiad liquefiable hylifadwy liquefied hylifedig liquefy hylifo liquid hylif liquid hylifol liquid assets asedau hylifol liquid colour lliw hylifol liquid colourant lliwydd hylif liquid colourants lliwydd hylif liquid colours lliw hylifol liquid core craidd hylifol liquid cores craidd hylifol liquid crystal display arddangosiad grisial hylif (LCD) liquid crystals grisialau hylif liquid detergent glanedydd hylif liquid detergents glanedydd hylif liquid form ffurf hylifol liquid forms ffurf hylifol liquid measure mesur hylif liquid measures mesur hylif liquid medium cyfrwng hylif liquid mediums cyfrwng hylif liquid metal polish llathrydd metel hylifol liquid metal polishs llathrydd metel hylifol liquid soap sebon hylif liquid soaps sebon hylif liquid wax polish llathr cwyr hylif liquid wax polishs llathr cwyr hylif liquidate difodi liquidated damages clause cymal iawndal penodedig liquidated damages clauses cymal iawndal penodedig liquidation difodiant (=annihilation) liquidation methdaliad (=bankruptcy) liquidations difodiant (=annihilation) liquidations methdaliad (=bankruptcy) liquidity hylifedd liquidity preference theory damcaniaeth ffafriaeth hylifedd liquidizer hylifydd liquidizers hylifydd liquids hylif list rhestr list processing prosesu rhestri listen gwrando listen attentively gwrando'n astud listening comprehension gwrando a deall listening test prawf gwrando listening tests prawf gwrando lists rhestr litany litani literacy llythrennedd literal llythrennol literal rule rheol lythrennol literal rules rheol lythrennol literal translation cyfieithiad llythrennol literal translations cyfieithiad llythrennol literary llenyddol literary art celfyddyd lenyddol literary arts celfyddyd lenyddol literate llythrennog literature llenyddiaeth literature survey arolwg llenyddol literatures llenyddiaeth litharge litharg litharges litharg lithium lithiwm (Li) lithiums lithiwm (Li) lithograph lithograff lithographs lithograff lithography lithograffi lithology litholeg lithosere lithoser lithoseres lithoser lithosol lithosol lithosols lithosol lithosphere lithosffer lithospheres lithosffer litigant achwynwr litigants achwynwr litigate ymgyfreithio litigation cyfreitha litigious cyfreithgar litigiousness cyfreithgarwch litmus litmws litre litr litres litr litter gwasarn (=animal bedding) litter torllwyth (of animals) litters gwasarn (=animal bedding) litters torllwyth (of animals) littoral arfordir littoral arfordirol littorals arfordir liturgical litwrgaidd liturgy litwrgi live byw live action ffilmio byw (in film and television) live birth genedigaeth fyw live births genedigaeth fyw live centre canol tro (headstock) live centres canol tro (headstock) live knot cainc fyw live knots cainc fyw live music cerddoriaeth fyw live musics cerddoriaeth fyw live record cofnod byw live records cofnod byw live vaccine brechlyn byw live vaccines brechlyn byw live wire gwifren fyw live wires gwifren fyw liver afu liver fluke clefyd yr euod (disease) liver fluke llyngyren yr afu (organism) liver flukes clefyd yr euod (disease) liver flukes llyngyren yr afu (organism) livers afu liverwort llys yr afu liverworts llys yr afu livery lifrai livery and maintenance lifrai a chynhaliaeth livestock da byw livestock farming ffermio da byw living byw living bywoliaeth living cell cell fyw living cells cell fyw living thing peth byw living things peth byw livings bywoliaeth load llwyth load llwytho load bearing surface arwyneb sy'n dal pwysau load bearing surfaces arwyneb sy'n dal pwysau load current cerrynt llwyth load currents cerrynt llwyth load font llwytho ffont load point pwynt llwyth load points pwynt llwyth load-bearing wall wal cynnal pwysau load-bearing walls wal cynnal pwysau loader llwythwr (program) loaders llwythwr (program) loading bay man llwytho loads llwyth loafing yard lloc cadw loafing yards lloc cadw loam lom loams lom loamy lomog loan benthyca loan benthyciad loans benthyciad lob lob lob lobio lobate bar bar clustennog lobate bars bar clustennog lobby lobi (hall in parliament, a body of lobbyists) lobby lobïo lobby correspondent gohebydd lobi lobby correspondents gohebydd lobi lobbyist lobïwr lobbyists lobïwr lobe llabed lobed llabedog lobes llabed lobule llabeden lobules llabeden local lleol local agreed syllabus maes llafur cytûn lleol local anaesthetic anaesthetig lleol local anaesthetics anaesthetig lleol local area ardal leol local area network rhwydwaith ardal leol (LAN) local area networks rhwydwaith ardal leol (LAN) local areas ardal leol local authority awdurdod lleol local colour lliw lleol local colours lliw lleol local education authority awdurdod addysg lleol local environment amgylchedd lleol local environments amgylchedd lleol local government llywodraeth leol local governments llywodraeth leol local history hanes lleol local management of schools rheolaeth leol ysgolion local relief tirwedd leol local reliefs tirwedd leol local variable newidyn lleol local variables newidyn lleol localization lleoleiddiad (in economics) localizations lleoleiddiad (in economics) localized lleoledig localized activity gweithgaredd lleoledig localized unemployment diweithdra lleol localized unemployments diweithdra lleol locate lleoli locate position lleoli safle locating jig jig lleoli locating jigs jig lleoli locating pin pìn lleoli locating pins pìn lleoli locating plate plât lleoli locating plates plât lleoli location lleoliad location in space safle mewn gwagle location of activities lleoliad gweithgareddau location of features lleoliad nodweddion locational lleoliadol locational analysis dadansoddiad lleoliad locational control rheoli lleoliad locational framework fframwaith lleoliadol locational frameworks fframwaith lleoliadol locational quotient cyniferydd lleoliad locational quotients cyniferydd lleoliad locations lleoliad lock clo (on door etc) lock cloi lock loc (on canal) lock block bloc clo (flush door) lock blocks bloc clo (flush door) lock knit gweuglwm lock nut nyten gloi lock nuts nyten gloi lock out cau allan lock rail rheilen glo lock rails rheilen glo lock stitch pwyth clo lock stitches pwyth clo lock-seat clamp clamp sedd glo lock-seat clamps clamp sedd glo locking device dyfais gloi locking devices dyfais gloi locking plate plât cloi locking plates plât cloi locking stile cledren gloi locking stiles cledren gloi locking washer wasier gloi locking washers wasier gloi locking wedge lletem gloi locking wedges lletem gloi lockjaw genglo lockjaws genglo locks clo (on door etc) locks loc (on canal) lockshield valve falf gloi lockshield valves falf gloi locomotion ymsymudiad locomotions ymsymudiad locomotive locomotif locomotives locomotif locus locws locust locust locusts locust lode gwythïen (mineral) lodes gwythïen (mineral) lodestone tynfaen lodestones tynfaen lodge cyfrinfa lodgement till til glyniad lodgement tills til glyniad lodger lletywr lodgers lletywr lodges cyfrinfa lodging house llety lodging houses llety lodgings llety lodicule lodicwl lodicules lodicwl loft llofft lofted drive dreif uchel lofted drives dreif uchel lofts llofft log boncyff (of wood) log log (=record) log book llyfr log log books llyfr log log jam tagfa goed log jams tagfa goed log phase gwedd log log phases gwedd log log roll troi'n unionsyth log/exponential phase gwedd log/esbonyddol log/exponential phases gwedd log/esbonyddol logarithm logarithm logarithmic logarithmig logarithmic table tabl logarithmig logarithmic tables tabl logarithmig logarithms logarithm logic rhesymeg logic board bwrdd rhesymeg logic boards bwrdd rhesymeg logic circuit cylched resymeg logic circuits cylched resymeg logic design cynllun rhesymeg logic designs cynllun rhesymeg logic diagram diagram rhesymeg logic diagrams diagram rhesymeg logic element elfen resymeg logic elements elfen resymeg logic gate adwy resymeg logic gates adwy resymeg logic system system resymeg logic systems system resymeg logical rhesymegol logical operator gweithredydd rhesymegol logical operators gweithredydd rhesymegol logical record cofnod rhesymegol logical records cofnod rhesymegol logical shift syfliad rhesymegol logical shifts syfliad rhesymegol logical symbol symbol rhesymegol logical symbols symbol rhesymegol logical unit uned resymegol logical units uned resymegol logics rhesymeg logistics logisteg logo logo logogram logogram logograms logogram lone pair pâr unig lone pairs pâr unig lone parent family teulu un rhiant long hir long and short shoulder mortise and tenon joint uniad mortais a thyno ag ysgwydd hir a byr long and short shoulder mortise and tenon joints uniad mortais a thyno ag ysgwydd hir a byr long and short shouldered tenon tyno ysgwydd hir a byr long and short shouldered tenons tyno ysgwydd hir a byr long and short stitch hirbwyth a byrbwyth long auger taradr hir long augers taradr hir long broken line llinell hir doredig long broken lines llinell hir doredig long chain carboxylic acid asid carbocsylig cadwyn hir long chain carboxylic acids asid carbocsylig cadwyn hir long corner cornel bell (in sport) long corners cornel bell (in sport) long distance pellter hir long distances pellter hir long division rhannu hir long grain graen hir long grains graen hir long head stake bonyn pen hir long head stakes bonyn pen hir long high pass pàs hir uchel long hop pelen fer iawn (in cricket) long hops pelen fer iawn (in cricket) long innings batiad hir long jump naid hir long jumper neidiwr hir long jumpers neidiwr hir long jumps naid hir long leaf dalen hir long leafs dalen hir long leg coeswr pell long legs coeswr pell long low pass pàs hir isel long metre mesur hir long metres mesur hir long multiplication lluosi hir long nose pliers gefelen drwyn hir long off pellwr agored long offs pellwr agored long on pellwr coes long ons pellwr coes long parliament senedd faith long parliaments senedd faith long pitch nail hoelen bitsh hir long pitch nails hoelen bitsh hir long profile hydbroffil (of a river) long profiles hydbroffil (of a river) long range forces grymoedd amrediad pell long range plane awyren taith hir long range planes awyren taith hir long round nose pliers gefelen drwyn crwn hir long section hyd-doriad (of a river) long sections hyd-doriad (of a river) long ship llong hir long ships llong hir long sight golwg hir long sights golwg hir long snipe nose pliers gefelen drwyn crwn main hir long stay bed gwely arhosiad hir long stay beds gwely arhosiad hir long step cam hir long steps cam hir long waisted hirwasg long wall talcen hir (of building) long walls talcen hir (of building) long-arm stapler styffylwr hir long-arm staplers styffylwr hir long-armed cross stitch pwyth croes hirfraich long-armed cross stitches pwyth croes hirfraich long-chain cadwyn-hir long-life lamp lamp hir oes long-life lamps lamp hir oes long-ray rheidden-hir long-tailed skua sgiwen lostfain long-tailed skuas sgiwen lostfain long-term tymor hir long-term effects of abuse effeithiau tymor hir camdriniaeth long-term liabilities rhwymedigaethau tymor hir long-term study astudiaeth dymor hir long-term training ymarfer tymor hir long-term trainings ymarfer tymor hir longbow bwa hir longbows bwa hir longevity hirhoedledd longitude hydred longitude and latitude hydred a lledred longitudes hydred longitudinal hydredol longitudinal distance pellter hydredol longitudinal distances pellter hydredol longitudinal feed porthiant hydredol longitudinal feeds porthiant hydredol longitudinal movement symudiad hydredol longitudinal movements symudiad hydredol longitudinal muscle cyhyryn hydredol longitudinal muscles cyhyryn hydredol longitudinal profile proffil hydredol longitudinal profiles proffil hydredol longitudinal section toriad hydredol longitudinal sections toriad hydredol longitudinal vibration dirgryniad hydredol longitudinal vibrations dirgryniad hydredol longitudinal wave ton hydredol longitudinal waves ton hydredol longshore current cerrynt y glannau longshore currents cerrynt y glannau longshore drift drifft y glannau longshore drifts drifft y glannau longways for as many as will ar hyd i bawb a fynno longways set set ar hyd longways sets set ar hyd look edrych look and say method dull edrych a dweud look and say methods dull edrych a dweud look-at ar-edrych look-at table tabl ar-edrych look-at tables tabl ar-edrych look-up am-edrych look-up table tabl am-edrych look-up tables tabl am-edrych loom gwŷdd loom darning creithio gwŷdd looms gwŷdd loop dolen loop and tie dolen a chwlwm loop of Henle ascending limb aelod esgynnol dolen Henle loop of Henle descending limb aelod disgynnol dolen Henle loop stop dolen atal loop stops dolen atal looped cotton cotwm dolennog looped cottons cotwm dolennog looped fabric ffabrig dolennog looped fabrics ffabrig dolennog looped stitch pwyth dolen looped stitches pwyth dolen looped weave gwehyddiad dolennog looped weaves gwehyddiad dolennog loops dolen loose llac loose cover gorchudd rhydd loose covers gorchudd rhydd loose dye llifyn llac loose dyes llifyn llac loose feather tafod rhydd loose feathers tafod rhydd loose fit ffit lac loose fits ffit lac loose head pen rhydd loose heads pen rhydd loose joint uniad llac loose joints uniad llac loose knitting gwau llac loose maul sgarmes rydd loose mauls sgarmes rydd loose rivet rhybed llac loose riveting rhybedu llac loose rivets rhybed llac loose scrum sgrym rydd loose scrums sgrym rydd loose tongue tafod rhydd loose tongue joint uniad tafod rhydd loose tongue joints uniad tafod rhydd loose tongues tafod rhydd loose-leaf book llyfr dalennau rhydd loose-leaf books llyfr dalennau rhydd loosen rhyddhau looseness llacrwydd loosing gollwng (the bow) lop tocio lop-eared clustlipa lopolith lopolith lopoliths lopolith lopsided cam lord arglwydd lord of the manor arglwydd y faenor lords arglwydd lordship arglwyddiaeth lordships arglwyddiaeth lose colour bwrw lliw (enamelling colour) lose colour colli lliw (in general) lose control of the ball colli rheolaeth ar y bêl lose possession of the ball colli meddiant o'r bêl loss colled lost ball pêl goll lost balls pêl goll lost village pentref diflan lost villages pentref diflan lost-wax process proses cwyr coll lot and scot lot a scot lotion trwyth lotions trwyth loud cryf (of sound) loud sound sain gref loud sounds sain gref loudness cryfder (of sound) loudspeaker uchelseinydd loudspeakers uchelseinydd lough loch loughs loch lounge lolfa lounges lolfa louvre lwfer louvre window ffenestr louvre louvre windows ffenestr louvre louvres lwfer love dim sgôr (tennis score) love all dim dim (tennis score) love feast cariadwledd (=Christian feast) love feasts cariadwledd (=Christian feast) love game gêm i ddim low isel low angle ongl isel low angles ongl isel low ball pêl isel low balls pêl isel low carbon carbon isel low carbons carbon isel low cost labour llafur rhad low cost labours llafur rhad low dive deifio'n isel low foaming detergent glanedydd prindrochion low foaming detergents glanedydd prindrochion low frequency amledd isel (of oscillations) low key isgywair (in old Welsh music) low latitude lledred isel low latitudes lledred isel low level lefel isel low levels lefel isel low limit terfan isel low limits terfan isel low line llinell isel low lines llinell isel low net rhwyd isel low nets rhwyd isel low population density dwysedd poblogaeth isel low power drawing lluniad chwyddhad isel low power drawings lluniad chwyddhad isel low pressure gwasgedd isel low pressures gwasgedd isel low register nodau isel low relief cerfwedd isel low reliefs cerfwedd isel low resolution cydraniad isel low resolutions cydraniad isel low self-esteem hunan-barch isel low self-esteems hunan-barch isel low spin troelliad paredig low spins troelliad paredig low step cam isel low steps cam isel low voltage foltedd isel low voltages foltedd isel low water distyll low water mark marc distyll low water marks marc distyll low waters distyll low-angle plane plaen ongl-isel low-angle planes plaen ongl-isel low-level language iaith lefel isel low-level languages iaith lefel isel low-lying plain gwastadedd isel low-lying plains gwastadedd isel low-order is-werth low-order position safle is-werth low-order positions safle is-werth low-pass pas-isel low-pass filter hidlen pasio seiniau isel low-pass filters hidlen pasio seiniau isel lower gostwng lower attaining pupil disgybl is ei gyrhaeddiad lower attaining pupils disgybl is ei gyrhaeddiad lower bound arffin isaf lower bounds arffin isaf lower case letter llythyren fach lower case letters llythyren fach lower class dosbarth isaf lower ground islawr lower grounds islawr lower jaw gên isaf lower jaws gên isaf lower mordent isfordent lower mordents isfordent lower order haen isaf (in geology) lower orders haen isaf (in geology) lower register isgwmpasran lower registers isgwmpasran lower school ysgol isaf lower schools ysgol isaf lower the body gostwng y corff lower tier rhes isaf lower tiers rhes isaf lowest common multiple lluosrif cyffredin lleiaf lowest common multiples lluosrif cyffredin lleiaf lowest order gradd isaf lowest orders gradd isaf lowest terms ffurf symlaf lowland iseldir lowlands iseldir loxodrome locsodrom (=rhumb line) loxodromes locsodrom (=rhumb line) loyal teyrngar loyalist teyrngarwr loyalists teyrngarwr loyalty teyrngarwch loyalty card cerdyn ffyddlondeb loyalty cards cerdyn ffyddlondeb lozenge graver crafell losin lozenge gravers crafell losin lubricant iraid lubricants iraid lubricate iro lubricating nipples niplau iro lubricating point pwynt iro lubricating points pwynt iro lubrication iriad lubrications iriad lucerne maglys lucernes maglys lucid eglur ludo liwdo lug clust lukewarm claear lukewarm water dŵr claear lukewarm waters dŵr claear lullaby hwiangerdd lumbar meingefnol lumbar puncture tynnu hylif madruddyn y cefn lumbar region adran y meingefn lumbar regions adran y meingefn lumbar vertebra fertebra meingefnol lumbar vertebras fertebra meingefnol lumber coed lumbering coetmona lumberjack coetmon lumberjacks coetmon lumen lwmen lumens lwmen luminescence ymoleuedd luminescences ymoleuedd luminosity goleuedd luminous goleuol luminous intensity arddwysedd goleuol lump lwmp lump sum lwmp-swm lump sums lwmp-swm lumps lwmp lumpsucker pysgodyn clytsiwr lumpsuckers pysgodyn clytsiwr lunar day diwrnod lleuad lunar eclipse diffyg ar y lleuad lunar eclipses diffyg ar y lleuad lunar month mis lleuad lunar months mis lleuad lunatic gwallgofddyn lunatic fringe ymylwyr gwallgof lunatics gwallgofddyn lunch cinio canol dydd lunch interval amser cinio lunch intervals amser cinio lunches cinio canol dydd lune lŵn lunes lŵn lung ysgyfant lung capacity cynhwysedd yr ysgyfaint lung deflation dadchwythiant yr ysgyfaint lung deflations dadchwythiant yr ysgyfaint lung fish pysgodyn ysgyfeiniog lung fishs pysgodyn ysgyfeiniog lung volume cyfaint ysgyfaint lung volumes cyfaint ysgyfaint lunge rhagwth lunge forward rhagwth ymlaen lunge forwards rhagwth ymlaen lunge in low line rhagwth ar linell isel lunge outward rhagwth allan lunge outwards rhagwth allan lunge sideways rhagwth ochr lunges rhagwth lungs ysgyfant lunula lwnwla lunulas lwnwla lustre gloywedd lustre pottery crochenwaith gloywedd lustres gloywedd lustrous gloyw (finish) lustrous material defnydd gloyw lustrous materials defnydd gloyw lute liwt luteal cells celloedd lwteal luteinizing hormone hormon lwteineiddio luteinizing hormones hormon lwteineiddio lutenist liwtydd lutenists liwtydd lutes liwt lutetium lwtetiwm (Lu) lutetiums lwtetiwm (Lu) luting liwtio lux lwcs luxurious moethus luxury moeth luxury goods nwyddau moeth lychgate porth mynwent lychgates porth mynwent lying down gorweddol lying press gwasg osod lyme grass clymwellt lymph lymff lymph gland chwarren lymff lymph glands chwarren lymff lymph node nod lymff lymph nodes nod lymff lymph vessel pibell lymff lymph vessels pibell lymff lymphatic lymffatig lymphatic gland chwarren lymffatig lymphatic glands chwarren lymffatig lymphatic system system lymffatig lymphatic systems system lymffatig lymphocyte lymffocyt lymphocytes lymffocyt lymphs lymff lynchet glaslain lynchets glaslain lynx lyncs lynxes lyncs lyre lyra lyres lyra lyric drama drama delynegol lyric dramas drama delynegol lyric opera opera delynegol lyric operas opera delynegol lyric tenor tenor ysgafn lyric tenors tenor ysgafn lysergic acid diethylamide LSD deuethylamid asid lysergig lysine lysin lysines lysin lysis lysis lysogeny lysogenedd lysosome lysosom lysosomes lysosom lysozyme lysosym lysozymes lysosym lytic lytig macaroni cheese caws macaroni macaroni cheeses caws macaroni mace byrllysg macerate briwio maces byrllysg machine peiriannu machine peiriant machine architecture saernïaeth peiriant machine architectures saernïaeth peiriant machine attachments atodion peiriant machine code cod peiriant machine code language iaith cod peiriant machine code languages iaith cod peiriant machine codes cod peiriant machine cycle cylchred peiriant machine cycles cylchred peiriant machine darn craith peiriant machine darn patch clwt craith peiriant machine darn patches clwt craith peiriant machine darns craith peiriant machine embroidery brodwaith peiriant machine fell seam sêm ffel ddwbl machine fell seams sêm ffel ddwbl machine gather crychdynnu â pheiriant machine gun gwn peiriant machine guns gwn peiriant machine heads ebillres machine independent annibynnol ar y peiriant machine language iaith peiriant machine languages iaith peiriant machine made buttonhole twll botwm peiriant machine made buttonholes twll botwm peiriant machine needle nodwydd peiriant machine needles nodwydd peiriant machine operating system system weithredu peiriant (MOS) machine operating systems system weithredu peiriant (MOS) machine operator gweithiwr peiriannau machine operators gweithiwr peiriannau machine screw sgriw beiriant machine screws sgriw beiriant machine shop gweithdy peiriannau machine shops gweithdy peiriannau machine tools offer peiriannau machine vice feis peiriant machine vices feis peiriant machine washable golchadwy â pheiriant machine word gair peiriant machine words gair peiriant machined component cydran wedi'i pheiriannu machined components cydran wedi'i pheiriannu machinery peirianwaith machines peiriant machining allowance lwfans peiriannu machining allowances lwfans peiriannu mackerel sky traeth awyr macramé macramé macramé twine cortyn macramé macramé twines cortyn macramé macramés macramé macro macro macro factor macro ffactor macro factors macro ffactor macro nutrient macrofaethyn macro nutrients macrofaethyn macro programming rhaglennu macro macro-climate macrohinsawdd macro-climates macrohinsawdd macroassembler macrogydosodydd macroassemblers macrogydosodydd macrocosm macrocosm macrocosms macrocosm macroeconomic macro economaidd macroeconomic issue mater macroeconomaidd macroeconomic issues mater macroeconomaidd macroeconomic objective amcan macroeconomaidd macroeconomic objectives amcan macroeconomaidd macroeconomic policy polisi macroeconomaidd macroeconomic theory theori facroeconomaidd macrophage macroffag macrophages macroffag macula macwla maculas macwla made environment amgylchedd gwneud made environments amgylchedd gwneud made form ffurf wneud made forms ffurf wneud madrigal madrigal madrigals madrigal magazine cylchgrawn magazine cover clawr cylchgrawn magazine covers clawr cylchgrawn magazine rack rhesel gylchgronau magazine racks rhesel gylchgronau magazines cylchgrawn magenta magenta magentas magenta maggot cynrhonyn maggots cynrhonyn magic hud magic chain stitch pwyth cadwyn hud magic chain stitches pwyth cadwyn hud magician dewin magicians dewin magics hud magistracy ynadaeth magistrate ynad magistrates ynad magistrates court llys ynadon magistrates courts llys ynadon magma magma magmas magma magmatic magmatig magnesian magnesaidd magnesium magnesiwm (Mg) magnesium bicarbonate magnesiwm deucarbonad magnesium bicarbonates magnesiwm deucarbonad magnesium carbonate magnesiwm carbonad magnesium carbonates magnesiwm carbonad magnesiums magnesiwm (Mg) magnet magnet magnetic magnetig magnetic bearing cyfeiriant magnetig magnetic bearings cyfeiriant magnetig magnetic board bwrdd magnetig magnetic boards bwrdd magnetig magnetic bubble memory cof bwrlwm magnetig magnetic card cerdyn magnetig magnetic cards cerdyn magnetig magnetic catch clicied fagnetig magnetic catches clicied fagnetig magnetic core store storfa craidd magnetig magnetic core stores storfa craidd magnetig magnetic disk disg magnetig magnetic disks disg magnetig magnetic field maes magnetig magnetic field line llinell faes magnetig magnetic field lines llinell faes magnetig magnetic fields maes magnetig magnetic flux fflwcs magnetig magnetic flux density dwysedd fflwcs magnetig magnetic fluxes fflwcs magnetig magnetic ink character recognition adnabod nodau inc magnetig (MICR) magnetic medium cyfrwng magnetig magnetic mediums cyfrwng magnetig magnetic moment moment magnetig magnetic moments moment magnetig magnetic north gogledd magnetig magnetic norths gogledd magnetig magnetic pole pôl magnetig magnetic poles pôl magnetig magnetic stirrer tröydd magnetig magnetic stirrers tröydd magnetig magnetic tape tâp magnetig magnetic tapes tâp magnetig magnetism magnetedd (of property) magnetism magneteg (study of) magnetisms magnetedd (of property) magnetisms magneteg (study of) magnetization magneteiddiad magnetizations magneteiddiad magnetize magneteiddio magneto magneto magnetometer magnetomedr magnetometers magnetomedr magnetron magnetron magnetrons magnetron magnets magnet magnification chwyddhad magnifications chwyddhad magnifier chwyddhadur magnifiers chwyddhadur magnify chwyddo magnifying glass chwyddwydr magnitude maint magnitude and direction maint a chyfeiriad magnitude of linear motion maint mudiant llinol magnitudes maint magyar sleeve llawes magyar magyar sleeves llawes magyar mahlstick ffon peintiwr mahlsticks ffon peintiwr mahogany mahogani maiden name enw cyn priodi maiden names enw cyn priodi maiden over pelawd ddi-sgôr maiden overs pelawd ddi-sgôr mail post mail boat llong bost mail boats llong bost mail order archeb drwy'r post mail order archebu drwy'r post mail orders archeb drwy'r post mail-order archebion post mail-shot post-dafliad mail-shots post-dafliad mailcoach coets y post mailcoaches coets y post mails post main axis prif echelin main colour prif liw main colours prif liw main competitor prif gystadleuydd main competitors prif gystadleuydd main criterion prif faen prawf main criterions prif faen prawf main dimensions prif ddimensiynau main entrance porth (of church) main entrances porth (of church) main frame prif gyfrifiadur main frames prif gyfrifiadur main mast prif hwylbren main masts prif hwylbren main memory prif gof main menu prif ddewislen main menus prif ddewislen main pipe prif bibell main pipes prif bibell main rafter prif geibr main rafters prif geibr main religion prif grefydd main religions prif grefydd main screen prif sgrin main screens prif sgrin main sequence stars sêr prif ddilyniant main spindle prif werthyd (lathe part) main spindles prif werthyd (lathe part) main store prif storfa main stores prif storfa main stream prif ffrwd main streams prif ffrwd main subject prif destun main subjects prif destun main trend prif duedd main trends prif duedd mainland tir mawr mainlands tir mawr mains prif gyflenwad mainsail hwyl fawr mainsails hwyl fawr mainsheet prif raff mainsheets prif raff mainstream film ffilm brif ffrwd mainstream films ffilm brif ffrwd mainstreaming prif ffrydio maintain a part cynnal rhan maintain possession cadw meddiant maintain possession of the ball cadw meddiant o'r bêl maintained school ysgol a gynhelir maintained schools ysgol a gynhelir maintainer cynheiliad maintainers cynheiliad maintenance cynnal a chadw (of buildings etc) maintenance cost cost cynnal maintenance costs cost cynnal maintenance documentation dogfennaeth cynnal maintenance documentations dogfennaeth cynnal maintenance grant grant cynnal (for students) maintenance grants grant cynnal (for students) maintenance of growth cynnal twf maintenance operation gweithrediad cynnal maintenance operations gweithrediad cynnal maize India corn maize oil olew corn maize oils olew corn maizes India corn majestic mawreddog majesty mawrhydi majolica majolica (enamelled pottery) majolicas majolica (enamelled pottery) major mwyaf major uwch-gapten major aftershock prif ôl-gryniad major aftershocks prif ôl-gryniad major and minor games prif a mân chwaraeon major axis echelin hwyaf major chord cord mwyaf major chords cord mwyaf major common chord cord cyffredin mwyaf major common chords cord cyffredin mwyaf major diameter diamedr mwyaf major diameters diamedr mwyaf major health problem problem iechyd o bwys major health problems problem iechyd o bwys major incident digwyddiad mawr major incidents digwyddiad mawr major interval cyfwng mwyaf major intervals cyfwng mwyaf major key cywair mwyaf major life change newid pwysig i fywyd major life changes newid pwysig i fywyd major order prif urdd major orders prif urdd major scale graddfa fwyaf major scales graddfa fwyaf major-general uwch-frigadydd major-generals uwch-frigadydd majority mwyafrif majors uwch-gapten majuscule llythrennau bras make gwneud make a bridge gwneud pont make a circle gwneud cylch make a dance creu dawns make a decision penderfynu make a sketch-map llunio llinfap make fast clymwch make judgement barnu make observations cynnig arsylwadau make patterns gwneud patrymau make the transition croesi'r bont (linguistically) make up dyfeisio (=devise) make up paratoi (a solution) make up to the mark llenwi hyd at y graddnod make-believe dychymyg make-believe ffug make-believe smalio make-believes dychymyg make-up colur (cosmetics) make-up coluro (cosmetics) make-up box blwch coluro make-up boxes blwch coluro make-ups colur (cosmetics) mako shark morgi trwynfain mako sharks morgi trwynfain maladjusted child plentyn heb ymaddasu maladjusted childs plentyn heb ymaddasu maladjustment diffyg ymaddasiad maladjustments diffyg ymaddasiad maladministration camweinyddu malaria malaria malarial swamps gwernydd malaria malarias malaria male gwryw male gwrywol male gamete gamet gwryw male gametes gamet gwryw male reproductive cell cell atgenhedlol wrywol male reproductive cells cell atgenhedlol wrywol male voice choir côr meibion male voice choirs côr meibion maleness gwrywedd males gwryw malformation camffurfiad malformations camffurfiad malfunction camweithio malfunction diffyg malfunctions diffyg malic acid asid malig malic acids asid malig malicious damage difrod maleisus malicious damages difrod maleisus malignant malaen malleability hydrinedd malleable hydrin malleable cast iron haearn bwrw hydrin malleable cast irons haearn bwrw hydrin malleable iron dur canol (ferrous metal) malleable iron haearn hydrin malleable irons dur canol (ferrous metal) malleable irons haearn hydrin malleable nail hoelen hydrin malleable nails hoelen hydrin mallee malî mallees malî mallet gordd mallets gordd malleus morthwyl y glust malnutrition diffyg maeth malnutritions diffyg maeth malonic acid asid malonig malonic acids asid malonig malt brag brag malt brags brag malt bread bara brag malt breads bara brag maltose maltos maltoses maltos mamillated bronennog mammal mamolyn mammalian mamolaidd mammalian skeleton sgerbwd mamolaidd mammalian skeletons sgerbwd mamolaidd mammals mamolyn mammary bronnol mammary gland chwarren laeth mammary glands chwarren laeth mammatocumulus brongwmwl mammoth mamoth mammoths mamoth man to man defence amddiffyn dyn am ddyn man-at-arms milwr arfog man-day dydd gweithiwr man-machine interface rhyngwyneb peiriant-dyn man-machine interfaces rhyngwyneb peiriant-dyn man-made fibre ffibr gwneud man-made fibres ffibr gwneud man-made materials defnyddiau gwneud man-made object gwrthrych gwneud man-made objects gwrthrych gwneud man-of-war llong arfog man-of-wars llong arfog manage rheoli manage and control rheoli a chadw trefn manage environments rheoli amgylcheddau manage expenditure rheoli gwariant manageable hylaw managed exchange rate cyfradd cyfnewid reoledig managed exchange rates cyfradd cyfnewid reoledig management rheolaeth (act of) management rheolwyr (=managers) management information gwybodaeth rheoli management informations gwybodaeth rheoli managements rheolaeth (act of) manager rheolwr manageress rheolwraig managerial rheolaethol managerial post swydd reoli managerial posts swydd reoli managerial skills sgiliau rheoli managerial studies astudiaethau rheoli managers rheolwr managing director rheolwr-gyfarwyddwr managing directors rheolwr-gyfarwyddwr managing unwanted behaviour rheoli ymddygiad digroeso manciple swyddog cyflenwi manciples swyddog cyflenwi mandarin collar coler mandarin mandarin collars coler mandarin mandarin ink inc mandarin mandarin inks inc mandarin mandate mandad mandated mandedig mandated territory tiriogaeth fandadol mandates mandad mandatory gorfodol mandatory exception eithriad gorfodol mandatory exceptions eithriad gorfodol mandatory grant grant gorfodol mandatory grants grant gorfodol mandatory unit uned orfodol mandatory units uned orfodol mandible mandibl mandibles mandibl mandibular arch bwa'r mandibl mandibular arches bwa'r mandibl mandolin mandolin mandolins mandolin mandorla mandorla mandorlas mandorla mandrel mandrel (lathe part) mandrels mandrel (lathe part) manganese manganîs (Mn) manganeses manganîs (Mn) mangle mangl mangle manglo mangles mangl mango mango mangrove swamp gwern fangrof mangrove swamps gwern fangrof manhole twll archwilio manholes twll archwilio manhood suffrage pleidlais gwŷr manhood suffrages pleidlais gwŷr mania mania manias mania manic manig manic depression iselder manig manic depressions iselder manig manifest amlygu manifest destiny arfaeth amlwg manifesto maniffesto manifold maniffold manifolds maniffold manikin manicin manikins manicin manilla manila manilla paper papur manila manilla papers papur manila manillas manila manipulate llawdrin (with hands) manipulate trin (data etc) manipulation llawdriniaeth manipulations llawdriniaeth manipulative play chwarae trin â’r dwylo manipulative skill sgìl llawdriniol manipulative skills sgìl llawdriniol manna manna mannas manna mannerism darddulliaeth (in art) mannerisms darddulliaeth (in art) mannerist darddullaidd mannerist darddullwr mannerist style arddull darddullaidd mannerist styles arddull darddullaidd mannerists darddullwr manoeuvres ymarferion manometer manomedr manometers manomedr manor maenor manorial system trefn faenorol manorial systems trefn faenorol manors maenor manpower adnoddau llafur (of resources) manpower gweithlu (=labour force) manpower planning cynllunio nifer y gweithlu manpowers gweithlu (=labour force) mansard roof to mansard mansard roofs to mansard mansion plas mansion house plasty mansion houses plasty mansions plas mantel shelf silff fantell mantel shelfs silff fantell mantelpiece silff ben tân mantelpieces silff ben tân mantissa mantisa mantissas mantisa mantle mantell mantle mantellu mantle cavity ceudod mantell mantle rock creicaen mantle rocks creicaen mantles mantell mantra mantra mantras mantra manual llawlyfr (book) manual seinglawr (on instrument) manual sphygmomanometer teclyn mesur pwysau gwaed llaw manual sphygmomanometers teclyn mesur pwysau gwaed llaw manual worker gweithiwr llaw manual workers gweithiwr llaw manuals llawlyfr (book) manuals seinglawr (on instrument) manufacture cynhyrchu manufactured apparatus offer parod manufactured board pren cyfansawdd manufactured boards pren cyfansawdd manufactured cloth defnydd gwneud manufactured cloths defnydd gwneud manufactured goods gweithgynhyrchion manufacturer gwneuthurwr manufacturers gwneuthurwr manufacturing industry diwydiant gweithgynhyrchu manumission rhyddhau manumissions rhyddhau manure tail manure teilo manures tail manuscript llawysgrif manuscript ink inc llawysgrif manuscript inks inc llawysgrif manuscript lettering llythrennu llawysgrif manuscript music book llyfr erwydd manuscript music books llyfr erwydd manuscript paper papur erwydd (for music) manuscript papers papur erwydd (for music) manuscript sheet taflen erwydd (for music) manuscript sheets taflen erwydd (for music) manuscripts llawysgrif many-many correspondence cyfatebiaeth llawer-i-lawer many-many correspondences cyfatebiaeth llawer-i-lawer many-one correspondence cyfatebiaeth llawer-i-un many-one correspondences cyfatebiaeth llawer-i-un many-to-many llawer-i-lawer many-valued lluoswerth map map map mapio map analysis dadansoddiad map map reference cyfeirnod map map references cyfeirnod map map sheet dalen fap map sheets dalen fap mapping pen pen mapio mapping pens pen mapio maquette maquette maquettes maquette marathon marathon marathons marathon marauder ysbeiliwr marauders ysbeiliwr marble marblen marble marmor marble chips sglodion marmor marbles marblen marbles marmor marbling marmori marbling colour lliw marmori marbling colours lliw marmori marbling comb crib farmori marbling combs crib farmori marbling effects effeithiau marmori marbling technique techneg marmori marbling techniques techneg marmori marbling trough cafn marmori marbling troughs cafn marmori march goror (=border) march gorymdaith (=procession) march gorymdeithio (=walk in procession) march ymdaith (=journey) march ymdeithgan (music) march ymdeithio (=journey) marcher Lords Arglwyddi'r Mers marcher customs arferion y Mers marches goror (=border) marches gorymdaith (=procession) marches ymdaith (=journey) marches ymdeithgan (music) marching camp gwersyll dros dro marching camps gwersyll dros dro margarine margarin margarines margarin margin maint (of profit) margin ymyl (of page) margin guide canllaw ymyl margin guides canllaw ymyl margin of error lled y gwall margin release datglöwr margin releases datglöwr margin setting gosodiad ymyl margin settings gosodiad ymyl margin stop stop ymyl margin stops stop ymyl marginal ymylol marginal cost cost ymylol marginal costing costio ymylol marginal costs cost ymylol marginal distribution function ffwythiant dosraniad ymylol marginal distribution functions ffwythiant dosraniad ymylol marginal efficiency of capital effeithlonrwydd ymylol cyfalaf marginal land tir ymylol marginal lands tir ymylol marginal product cynnyrch ymylol marginal products cynnyrch ymylol marginal propensity to consume tuedd ymylol i dreulio marginal propensity to import tuedd ymylol i fewnforio marginal propensity to save tuedd ymylol i gynilo marginal rate of tax cyfradd ymylol treth marginal revenue refeniw ymylol marginal revenue product cynnyrch refeniw ymylol marginal revenue products cynnyrch refeniw ymylol marginal revenues refeniw ymylol marginal utility budd ymylol marginalize ymyleiddio margins maint (of profit) margins ymyl (of page) marina marina marinas marina marine morol marine môr-filwr marine grade plywood pren haenog gradd morol marine grade plywoods pren haenog gradd morol marine painting môr-baentiad (of picture) marine painting môr-beintio (of process or art) marine paintings môr-baentiad (of picture) marine varnish farnais morol marine varnishs farnais morol marines môr-filwr marionette pyped marionettes pyped marital priodasol maritime arforol (=coastal) maritime morwrol (=seafaring) maritime law cyfraith forwrol maritime laws cyfraith forwrol mark marc (numerical or alphabetical award) mark marcio mark nod (trace or symbol) mark of expression marc mynegiant mark out marcio mark scheme cynllun marcio mark schemes cynllun marcio mark sensing synhwyro marc mark sheet taflen farciau mark sheets taflen farciau mark the opponent marcio'r gwrthwynebwr mark weighting pwysiad marciau mark weightings pwysiad marciau marked price pris dangosol marked prices pris dangosol marker marciwr markers marciwr market marchnad market marchnata market analysis dadansoddiad o'r farchnad market characteristic nodwedd farchnad market characteristics nodwedd farchnad market conditions cyflwr y farchnad market demand curve cromlin galw marchnad market demand curves cromlin galw marchnad market economy economi marchnad market failure methiant y farchnad market failures methiant y farchnad market force grym y farchnad market forces grym y farchnad market garden gardd fasnachol market gardening garddio masnachol market gardens gardd fasnachol market place marchnad market places marchnad market pull tyniad y farchnad market pulls tyniad y farchnad market research ymchwil marchnata market research strategy strategaeth ymchwil farchnata market researches ymchwil marchnata market segment segment o’r farchnad market segmentation segmentiad y farchnad market segmentations segmentiad y farchnad market segments segment o’r farchnad market square sgwâr marchnad market squares sgwâr marchnad market town tref farchnad market towns tref farchnad market value gwerth y farchnad market values gwerth y farchnad marketable gwerthadwy marketable wealth cyfoeth gwerthadwy marketable wealths cyfoeth gwerthadwy marketing communications cyfathrebu marchnata marketing department adran farchnata marketing departments adran farchnata marketing manager rheolwr marchnata marketing managers rheolwr marchnata marketing mix cymysgedd marchnata marketing mixes cymysgedd marchnata marketing plan cynllun marchnata marketing plans cynllun marchnata marketing research ymchwil i farchnata marketing research agency asiantaeth ymchwil marchnata marketing researches ymchwil i farchnata marketing strategy strategaeth farchnata markets marchnad marking gauge medrydd marcio marking gauges medrydd marcio marking knife cyllell farcio marking knifes cyllell farcio marking medium cyfrwng marcio marking mediums cyfrwng marcio marking out fluid llifydd marcio marking out fluids llifydd marcio marking table bwrdd marcio marking tables bwrdd marcio marks marc (numerical or alphabetical award) marks nod (trace or symbol) marl marl marl marlio marls marl marly marlog marouflage marouflage marouflages marouflage marquetry argaenwaith marquis ardalydd marram grass moresg marriage priodas marriage by proxy priodas ddirprwyol marriage portion gwaddol priodferch marriage portions gwaddol priodferch marriage settlement cytundeb priodas marriage settlements cytundeb priodas marriages priodas marrow mêr marrows mêr marsh fritillary brith y gors marsh or salting mignen neu halwyndir marsh orchid tegeirian rhuddgoch marsh orchids tegeirian rhuddgoch marshal marsial marshalling yard iard drefnu marshalling yards iard drefnu marshals marsial mart marchnad martensite martensit martensites martensit martial law cyfraith rhyfel martial laws cyfraith rhyfel marts marchnad martyr merthyr martyr merthyru martyrdom merthyrdod martyrdoms merthyrdod martyrology merthyroleg martyrs merthyr mashlum amyd mashlums amyd mask cuddio (=hide) mask masgio (with masking tape) mask mwgwd maskable interrupt ymyriad cuddiadwy maskable interrupts ymyriad cuddiadwy masked sprite ciplun cuddiedig masked sprites ciplun cuddiedig masking tape tâp masgio masking tapes tâp masgio masks mwgwd mason saer maen masonry bit ebill maen masonry bits ebill maen masonry drill dril gwaith maen masonry drills dril gwaith maen masonry nail hoelen gwaith maen masonry nails hoelen gwaith maen masons saer maen masque masque masques masque mass màs (of matter) mass offeren mass defect diffyg màs mass defects diffyg màs mass flow màs-lifiad mass flows màs-lifiad mass for the dead offeren i'r meirw mass media cyfryngau torfol mass movement màs-symudiad (in physics) mass movement symudiad torfol (of people) mass movements màs-symudiad (in physics) mass movements symudiad torfol (of people) mass number rhif màs mass numbers rhif màs mass of solid màs y solid mass priest periglor mass priests periglor mass produce masgynhyrchu mass produced goods nwyddau masgynnyrch mass production masgynhyrchu mass spectrograph sbectrograff màs mass spectrographs sbectrograff màs mass spectrometer sbectromedr màs mass spectrometers sbectromedr màs mass spectrum sbectrwm màs mass spectrums sbectrwm màs mass storage storfa fàs mass storages storfa fàs mass-wasting masddarfodiant mass-wastings masddarfodiant massacre cyflafan (of specific historical instances) massacre lladdfa (in general especially in plural) massacres cyflafan (of specific historical instances) massacres lladdfa (in general especially in plural) massage tylino'r corff masseter muscle cyhyryn maseter masseter muscles cyhyryn maseter massif masiff massifs masiff massive enfawr (=enormous) massive masfawr (in physics) mast hwylbren mast cell mastgell mast cells mastgell master meistr master meistroli master prif (=main) master / slave system system meistr / gwas master / slave systems system meistr / gwas master cast cast gwreiddiol master casts cast gwreiddiol master copy copi gwreiddiol master of the rolls meistr y roliau master page prif dudalen master pages prif dudalen master's degree gradd meistr master's degrees gradd meistr masters meistr mastery meistrolaeth mastery learning dysgu meistrolaeth mastery test prawf meistrolaeth mastery tests prawf meistrolaeth masthead teitl mastheads teitl mastic mastig masticate cnoi mastics mastig mastoid process cnepyn mastoid masts hwylbren masturbate mastyrbio masturbation mastyrbiad masturbations mastyrbiad mat mat match cydweddu match gêm (=game) match boards byrddau cydwedd match play chwarae gornest match point pwynt gornest match points pwynt gornest matchboarding estyll cydwedd matchboarding panel panel estyll cydwedd matchboarding panels panel estyll cydwedd matches gêm (=game) matching accessories cyfwisgoedd cydwedd matching plane plaen cydweddu matching planes plaen cydweddu matching sides ochrau cyfatebol matchstick coes matsen matchsticks coes matsen mate cyplu material defnydd (=fabric, objects with physical presence) material deunydd (=information and other abstractions) material materol material characteristics nodweddion defnyddiau material object gwrthrych materol material objects gwrthrych materol material weave gwehyddiad defnydd material weaves gwehyddiad defnydd materialism materoliaeth materialisms materoliaeth materials defnydd (=fabric, objects with physical presence) materials deunydd (=information and other abstractions) materials and components defnyddiau a chydrannau materials list rhestr ddefnyddiau materials lists rhestr ddefnyddiau maternal mamol maternal chromosome cromosom o du'r fam maternal chromosomes cromosom o du'r fam maternal deprivation theory damcaniaeth amddifadaeth mam maternity mamolaeth maternity allowance lwfans mamolaeth maternity allowances lwfans mamolaeth maternity grant grant mamolaeth maternity grants grant mamolaeth maternity home cartref mamolaeth maternity homes cartref mamolaeth maternity hospital ysbyty mamolaeth maternity hospitals ysbyty mamolaeth maternity leave absenoldeb mamolaeth maternity leaves absenoldeb mamolaeth mathematical mathemategol mathematical argument dadl fathemategol mathematical arguments dadl fathemategol mathematical convention confensiwn mathemategol mathematical conventions confensiwn mathemategol mathematical explanation esboniad mathemategol mathematical explanations esboniad mathemategol mathematical induction anwythiad mathemategol mathematical inductions anwythiad mathemategol mathematical language iaith fathemategol mathematical languages iaith fathemategol mathematical similarity cyflunedd mathemategol mathematical symbol symbol mathemategol mathematical symbols symbol mathemategol mathematical techniques technegau mathemategol mathematics mathemateg mating instinct greddf baru mating instincts greddf baru mating parts rhannau paru matins boreol weddi matinée coat cot matinée matinée coats cot matinée matriarchal matriarchaidd matrilineal o linach y fam matrimonial priodasol matrimonial matter achos priodasol matrimonial matters achos priodasol matrimony priodas matrix matrics matrix board bwrdd matrics matrix boards bwrdd matrics matrix operator gweithredydd matrics matrix operators gweithredydd matrics matrix product lluoswm matrics matrix products lluoswm matrics matrixes matrics matron metron matrons metron matt mat matt fibreglass ffibrwydr mat matt finish gorffeniad mat matt finishs gorffeniad mat matt glaze gwydredd mat matt glazes gwydredd mat matt surface arwyneb mat matt surfaces arwyneb mat matt varnish farnais mat matt varnishs farnais mat matted matiog matter mater matters mater matting punch pwnsh matio matting punches pwnsh matio matting tool erfyn matio matting tools erfyn matio mattress matres mattress cover gorchudd matres mattress covers gorchudd matres maturation aeddfediad maturational aeddfedol maturations aeddfediad mature aeddfed mature aeddfedu mature and or semi-retired people pobl aeddfed a/neu wedi lled-ymddeol mature and or semi-retired peoples pobl aeddfed a/neu wedi lled-ymddeol mature insect pryfyn llawn-dwf mature insects pryfyn llawn-dwf maturity aeddfedrwydd maul sgarmes mauls sgarmes mauve porffor gwelw (enamelling colour) mauves porffor gwelw (enamelling colour) maxilla macsila maxillas macsila maxillo-facial surgeon llawfeddyg y genau a'r wyneb maxillo-facial surgeons llawfeddyg y genau a'r wyneb maxim gwireb maxima macsima (the note) maximal mwyafsymaidd maximas macsima (the note) maximise profit gwneud yr elw mwyaf posibl maximize uchafsymio (in mathematics) maxims gwireb maximum mwyaf (=largest) maximum uchafbwynt (=highest point) maximum uchafswm (of amount) maximum agitation cynnwrf hwyaf maximum agitations cynnwrf hwyaf maximum delegation dirprwyo eithaf maximum dimensions dimensiynau mwyaf maximum exploitation ymelwad mwyaf maximum exploitations ymelwad mwyaf maximum height uchder mwyaf maximum heights uchder mwyaf maximum multiplicity rule egwyddor lluosogrwydd macsimwm maximum multiplicity rules egwyddor lluosogrwydd macsimwm maximum negative negatif mwyaf maximum negatives negatif mwyaf maximum positive positif mwyaf maximum positives positif mwyaf maximum pressure gwasgedd mwyaf maximum pressures gwasgedd mwyaf maximum price control rheoli uchafbris maximum speed cyflymder eithaf (of car) maximum speeds cyflymder eithaf (of car) maximum strength cryfder mwyaf maximum strengths cryfder mwyaf maximum temperature uchafbwynt tymheredd maximum temperature rise codiad tymheredd uchaf maximum temperature rises codiad tymheredd uchaf maximum temperatures uchafbwynt tymheredd maximum thermometer thermomedr uchafbwynt maximum thermometers thermomedr uchafbwynt maximum weight pwysau mwyaf maximums uchafbwynt (=highest point) maximums uchafswm (of amount) mayor maer mayoress maeres mayors maer maypole bedwen Fai maypoles bedwen Fai mazarin blue glas masarin (enamelling colour) mazarin blues glas masarin (enamelling colour) maze drysfa mazes drysfa mazurka mazurka mazurkas mazurka meadow dôl meadow soils dolbriddoedd meadows dôl meals on wheels pryd ar glud mean cymedr (in statistics) mean cymedrig (in statistics) mean bond energy egni bond cymedrig mean deviation gwyriad cymedrig mean deviations gwyriad cymedrig mean diameter circle cylch diamedr cymedrig mean diameter circles cylch diamedr cymedrig mean difference gwahaniaeth cymedrig mean differences gwahaniaeth cymedrig mean error cyfeiliornad cymedrig mean errors cyfeiliornad cymedrig mean free path llwybr rhydd cymedrig mean free paths llwybr rhydd cymedrig mean proportional cymedr cyfrannol mean proportionals cymedr cyfrannol mean relative atomic mass màs atomig cymharol cymedrig mean score sgôr gymedrig mean scores sgôr gymedrig mean sea level lefel môr cymedrig mean sea levels lefel môr cymedrig mean temperature tymheredd cymedrig mean temperatures tymheredd cymedrig mean time amser cymedrig mean times amser cymedrig mean tone temperament ardymer trydydd cyfartal mean tone temperaments ardymer trydydd cyfartal mean value gwerth cymedrig mean values gwerth cymedrig mean weight pwysau cymedrig mean wind speed cyflymdra cyfartalog y gwynt mean wind speeds cyflymdra cyfartalog y gwynt meander dolennu meander ystum afon meander belt llain ystumiau meander belts llain ystumiau meander scar craith ystum meander scars craith ystum meanders ystum afon meaning ystyr meaningless diystyr meanings ystyr means cymedr (in statistics) means modd means of communication dull o gyfathrebu means of improvement ffordd o wella means of payment modd talu means of production modd cynhyrchu means of propulsion dull symud means test prawf modd means testing profi modd means tests prawf modd measles brech goch measurable mesuradwy measure bar (=bar) measure mesur measure distances mesur pellteroedd measure of spread mesur o wasgariad measure of turn mesur troi measurement mesuriad measurements mesuriad measurements of energy mesuriadau egni measures bar (=bar) measures mesur measuring and marking out mesur a marcio measuring cylinder silindr mesur measuring cylinders silindr mesur measuring device dyfais fesur measuring devices dyfais fesur measuring instruments offer mesur measuring methods dulliau mesur measuring tape tâp mesur measuring tapes tâp mesur meat cig meats cig mechanical mecanyddol mechanical advantage mantais fecanyddol mechanical advantages mantais fecanyddol mechanical agitation cynnwrf mecanyddol mechanical agitations cynnwrf mecanyddol mechanical arithmetic rhifyddeg fecanyddol mechanical arithmetics rhifyddeg fecanyddol mechanical concept cysyniad mecanyddol mechanical concepts cysyniad mecanyddol mechanical cutting torri mecanyddol mechanical drawing lluniadu mecanyddol mechanical exercise ymarfer mecanyddol mechanical exercises ymarfer mecanyddol mechanical form ffurf beiriannol mechanical forms ffurf beiriannol mechanical principle egwyddor fecanyddol mechanical principles egwyddor fecanyddol mechanical structure ffurfiad mecanyddol mechanical structures ffurfiad mecanyddol mechanics mecaneg mechanism mecanwaith mechanism of breathing mecanwaith anadlu mechanisms mecanwaith mechanization mecaneiddiad mechanizations mecaneiddiad mechanize mecaneiddio mechanoreceptor mecanodderbynnydd mechanoreceptors mecanodderbynnydd meconium meconiwm meconiums meconiwm medal medal medals medal media cyfryngau media companies cwmnïau'r cyfryngau media concepts cysyniadau'r cyfryngau media imperialism imperialaeth gyfryngol media imperialisms imperialaeth gyfryngol media industries diwydiannau'r cyfryngau media language iaith y cyfryngau media languages iaith y cyfryngau media producer cynhyrchydd cyfryngau media producers cynhyrchydd cyfryngau media production cynnyrch cyfryngol media productions cynnyrch cyfryngol media saturation gorlwytho cyfryngol media text testun cyfryngol media texts testun cyfryngol medial medial medial fin asgell ganol medial fins asgell ganol medial moraine marian canol medial moraines marian canol median canolrif (in statistics) median canolrifau median canolwedd (in anatomy) median llin ganol (in geometry) median fin asgell ganol median fins asgell ganol medians canolrif (in statistics) medians canolrifau medians canolwedd (in anatomy) medians llin ganol (in geometry) mediant meidon mediants meidon mediastinum mediastinwm mediastinums mediastinwm mediate cyfryngu (ideas etc) mediation cyflafareddu (in disputes) mediation cyfryngiad (with intermediate agency, also in plainsong) mediations cyfryngiad (with intermediate agency, also in plainsong) mediator cyfryngwr mediators cyfryngwr medical meddygol medical assessment asesiad meddygol medical assessments asesiad meddygol medical audit archwiliad meddygol medical audits archwiliad meddygol medical certificate tystysgrif feddygol medical certificates tystysgrif feddygol medical condition cyflwr meddygol medical conditions cyflwr meddygol medical model model meddygol medical model of disability model meddygol o anabledd medical models model meddygol medical photography ffotograffiaeth feddygol medical physics ffiseg feddygol medical school ysgol feddygol medical schools ysgol feddygol medication meddyginiaeth medications meddyginiaeth medicinal leech gelen feddyginiaethol medicinal leeches gelen feddyginiaethol medicine meddygaeth (science of) medicine moddion (=drug or preparation) medicines meddygaeth (science of) medicines moddion (=drug or preparation) medieval canoloesol meditation myfyrdod meditations myfyrdod medium canolig medium cyfrwng medium agitation cynnwrf cymedrol medium agitations cynnwrf cymedrol medium carbon carbon canolig medium carbon steel dur carbon canolig medium carbon steels dur carbon canolig medium carbons carbon canolig medium grain graen canol medium grains graen canol medium grit grit canolig medium grits grit canolig medium knurl nwrl canolig medium knurls nwrl canolig medium of education cyfrwng addysg medium oilstone carreg hogi gradd ganol medium oilstones carreg hogi gradd ganol medium pace bowling bowlio canolig medium scale integration cyfannu graddfa ganolig (MSI) medium size scissors siswrn canolig mediums cyfrwng medley relay race ras gyfnewid dulliau cymysg medley relay races ras gyfnewid dulliau cymysg medley swimming nofio dulliau cymysg medulla medwla medulla oblongata medwla oblongata medulla oblongatas medwla oblongata medullary medwlaidd medullary ray rheidden greiddiol medullas medwla medullated nerve fibre edefyn nerf myelinedig medullated nerve fibres edefyn nerf myelinedig meet cyfarfod meeting cyfarfod meeting rail rheilen gwrdd meeting rails rheilen gwrdd meeting stile cledren gwrdd meeting stiles cledren gwrdd meetings cyfarfod megabyte megabeit (Mb) megabytes megabeit (Mb) megakaryocyte megacaryocyt megakaryocytes megacaryocyt megalith megalith megaliths megalith megalopolis megalopolis meganucleus megacnewyllyn megaspore megasbor megaspores megasbor megatherm megatherm megatherms megatherm megavolt megafolt (MV) megavolts megafolt (MV) megohm megohm megohms megohm meiosis meiosis meiotic meiotig melamine melamin melamine base sylfaen melamin melamine bases sylfaen melamin melamine formaldehyde melamin fformaldehyd melamine formaldehydes melamin fformaldehyd melamines melamin melancholy lleddf melanin melanin melanins melanin melanocyte melanocyt melanocytes melanocyt melanophore melanoffor melanophores melanoffor melisma melisma melismas melisma melismatic melismataidd melodic alawol (in contrast to harmonic) melodic melodaidd (quality) melodic melodig (form) melodic chromatic scale graddfa gromatig felodig melodic chromatic scales graddfa gromatig felodig melodic interval cyfwng melodaidd melodic intervals cyfwng melodaidd melodic line llinell felodig melodic lines llinell felodig melodic pattern patrwm melodig melodic patterns patrwm melodig melodic sequence dilyniant alawol melodic sequences dilyniant alawol melodic shape siâp melodig melodic shapes siâp melodig melodrama melodrama melodramas melodrama melody alaw melody melodi (=sweet music, tunefulness) melody by condensation alaw wedi'i chywasgu melt ymdoddi melt water dŵr tawdd melt waters dŵr tawdd melting method dull toddi (in cooking) melting methods dull toddi (in cooking) melting point ymdoddbwynt melting points ymdoddbwynt melting pot pair (figurative use) melting pots pair (figurative use) member aelod member of the team aelod o'r tîm members aelod membership aelodaeth memberships aelodaeth membrane pilen membraneous pilennog membranes pilen memoirs hunangofiant (=autobiography) memorandum memorandwm memorandum of association memorandwm sefydlu memorandums memorandwm memorize dysgu ar y cof memory cof memory expansion ehangiad cof memory expansions ehangiad cof memory map map y cof memory maps map y cof memory span cyfnod cofio memory spans cyfnod cofio mend trwsio mendelevium mendelefiwm (Md) mendeleviums mendelefiwm (Md) mendicant cardotaidd mendicant cardotyn mendicant friar brawd cardod mendicant friars brawd cardod mendicants cardotyn mending wool gwlân cyweirio mending wools gwlân cyweirio meninges pilenni'r ymennydd meningitis llid yr ymennydd meniscus menisgws menopause diwedd y mislif menopauses diwedd y mislif menstrual cycle cylchred fislifol menstrual cycles cylchred fislifol menstruation mislif menstruations mislif mensuration mesureg mensurations mesureg mental meddyliol mental ability gallu meddyliol mental activity gweithgaredd meddyliol mental age oed meddyliol mental ages oed meddyliol mental arithmetic rhifyddeg pen mental arithmetic test prawf rhifyddeg pen mental arithmetic tests prawf rhifyddeg pen mental arithmetics rhifyddeg pen mental capacity gallu meddyliol mental deficiency nam meddyliol mental development datblygiad meddyliol mental developments datblygiad meddyliol mental disability anabledd meddyliol mental disorder anhwylder meddwl mental disorders anhwylder meddwl mental disturbance aflonyddwch meddwl mental disturbances aflonyddwch meddwl mental handicap anfantais meddwl mental handicaps anfantais meddwl mental health iechyd meddwl mental health nurse nyrs iechyd meddwl mental health nurses nyrs iechyd meddwl mental health nursing nyrsio iechyd meddwl mental healths iechyd meddwl mental illness afiechyd meddwl mental retardation arafwch meddwl mental retardations arafwch meddwl mentally handicapped child plentyn â nam meddyliol mentally handicapped childs plentyn â nam meddyliol mentor mentor mentoring mentora mentors mentor mentorship mentoriaeth mentorships mentoriaeth menu bwydlen (of food) menu dewislen (of choices) menu card cerdyn bwydlen menu cards cerdyn bwydlen menu-driven system system ddewisyriad menu-driven systems system ddewisyriad menus bwydlen (of food) menus dewislen (of choices) mercantile quality safon gwerthu mercantilism mercantiliaeth mercantilisms mercantiliaeth mercenary hurfilwr mercerization sgleiniad mercerizations sgleiniad mercerized sglein (finish) mercerized cord cortyn sglein mercerized cords cortyn sglein mercerized cotton cotwm sglein mercerized cottons cotwm sglein merchandise nwyddau (of goods) merchant masnachwr merchant bank banc masnachol merchant banks banc masnachol merchant guild gild y masnachwyr merchant guilds gild y masnachwyr merchant shipping llongau masnach merchants masnachwr merchet amobr merchets amobr mercuric mercwrig mercury mercwri (Hg) merge cydsoddi (in economics) merge cyfuno (files etc) merge sort trefniad cyfunol merge sort trefnu cyfunol merge sorts trefniad cyfunol merge-filing cyfun-ffeilio merged cyfun merger cydsoddiad (in economics) mergers cydsoddiad (in economics) meridian meridian meridians meridian meristem meristem meristematic meristematig meristems meristem merit teilyngdod merit goods nwyddau rhinweddol merit pay rise cynnydd cyflog teilyngdod merit pay rises cynnydd cyflog teilyngdod meritocracy meritocratiaeth merits teilyngdod meromorphic meromorffig mesa mesa mesas mesa mesenteric mesenterig mesenteric artery rhydweli fesenterig mesenteric vein gwythïen fesenterig mesenteric veins gwythïen fesenterig mesentery mesenteri mesh masg (cogs) mesh masgio (cogs) mesh rhwyll (of wire etc) mesh refinement manylu'r rhwydwaith meshs masg (cogs) meshs rhwyll (of wire etc) mesoderm mesoderm mesodermic mesodermig mesoderms mesoderm mesogloea mesogloea mesogloeas mesogloea mesokurtic mesocwrtig mesolithic mesolithig meson meson mesons meson mesophyll mesoffyl mesophyllous mesoffylaidd mesophylls mesoffyl mesophyte mesoffyt mesophytes mesoffyt mesoscale graddfa ganol mesoscales graddfa ganol mesosternum mesosternwm mesosternums mesosternwm mesostome mesostom mesostomes mesostom mesothorax mesothoracs mesothoraxes mesothoracs message neges message switching switsio neges message window ffenestr neges message windows ffenestr neges messages neges messenger RNA RNA negeseuol messenger mRNA mRNA negeseuol mestizo mestiso meta-ethics metafoeseg meta-linguistic metaieithyddol metabolic metabolaidd metabolic breakdown ymddatod metabolaidd metabolism metabolaeth metabolisms metabolaeth metabolite metabolyn metabolites metabolyn metacarpal metacarpol metacarpus metacarpws metacentre metabwynt metacentres metabwynt metacentric metasentrig metacognition metawybyddiaeth metacognitions metawybyddiaeth metal metel metal beater curwr metel metal beaters curwr metel metal bending plygu metel metal casting castio metel metal caul gwasgblat metel metal cauls gwasgblat metel metal cladding gwisgo metel metal cutting torri metel metal fabrication ffabrigo metel metal fastener ffasnydd metel metal fasteners ffasnydd metel metal filler llenwad metel metal fillers llenwad metel metal foil ffoil metel metal foils ffoil metel metal forging gofannu metel metal jackplane plaen jac metel metal jackplanes plaen jac metel metal oxide ocsid metel metal oxides ocsid metel metal plane plaen metel metal planes plaen metel metal plug plwg metel metal plugs plwg metel metal pouring arllwys metel metal sawing llifio metel metal shearing torri metel metal spokeshave rhasgl fetel metal spokeshaves rhasgl fetel metallic metelig metallic cloth defnydd metelig metallic cloths defnydd metelig metallic element elfen fetelig metallic elements elfen fetelig metallic thread edau fetelig metallic threads edau fetelig metallicized material defnydd wedi'i feteleiddio metallicized materials defnydd wedi'i feteleiddio metalliferous metelifferaidd metalling metlin (road) metallings metlin (road) metallizing meteleiddio metalloid meteloid metallurgical metelegol metallurgical industry diwydiant metelegol metallurgy meteleg metals metel metalwork gwaith metel metalworks gwaith metel metamerism metameraeth metamerisms metameraeth metamorphic metamorffig metamorphism metamorffeg metamorphisms metamorffeg metamorphosed metamorffedig metamorphosis metamorffosis metamorphy metamorffedd metaphase metaffas metaphases metaffas metaphor trosiad metaphors trosiad metaphysical metaffisegol metapleural folds plygion metaplewraidd metastable metasefydlog metasternum metasternwm metasternums metasternwm metatarsal metatarsol metatarsus metatarsws metathesis metathesis metathorax metathoracs metathoraxes metathoracs metaxylem metasylem metaxylems metasylem meteor meteor meteoric meteorig meteorite meteoryn meteorites meteoryn meteorologic meteorolegol meteorology meteoroleg meteors meteor meter mesurydd (for measuring) meters mesurydd (for measuring) methane methan methanes methan methanol methanol methanols methanol methionine methionin methionines methionin method dull method of colour mixing dull cymysgu lliwiau method of composition dull cyfansoddi method of transport math o gludiant methodology methodoleg methods dull methoxyethane methocsiethan methoxyethanes methocsiethan methyl orange methyl oren methyl oranges methyl oren methylate methylu methylated spirits gwirod methyl methylbutyl methylbwtyl methylbutyls methylbwtyl meticulous gofalus iawn metonym trawsenw metonyms trawsenw metre mesur (in verse, music) metre metr (of metric unit) metre stick pren metr metre sticks pren metr metres mesur (in verse, music) metres metr (of metric unit) metric metrig metric measure mesur metrig metric measures mesur metrig metric rule riwl fetrig metric rules riwl fetrig metric scale graddfa fetrig metric scales graddfa fetrig metric system system fetrig metric systems system fetrig metric thread edau fetrig metric threads edau fetrig metric unit uned fetrig metric units uned fetrig metrical mydryddol metrical foot corfan metrical foots corfan metrical psalms salmau cân metronome metronom metronomes metronom mezzo-soprano mezzo-soprano mezzo-soprano clef cleff mezzo-soprano mezzo-soprano clefs cleff mezzo-soprano mezzotint mesotint mezzotints mesotint mica mica mica flake fflaw mica mica flakes fflaw mica micas mica micella micela micellas micela micelle misel micelles misel micro micro micro-crystalline microgrisialog micro-crystalline wax cwyr microgrisialog micro-crystalline waxes cwyr microgrisialog micro-organism micro-organeb micro-organisms micro-organeb microbe microb microbes microb microbial fermentation eplesiad microbaidd microbial fermentations eplesiad microbaidd microbiologist microbiolegydd microbiologists microbiolegydd microbiology microbioleg microburin microbwyntil microburins microbwyntil microcard microgerdyn microcards microgerdyn microclimate microhinsawdd microclimates microhinsawdd microclimatology microhinsoddeg microcode microgod microcodes microgod microcomputer microgyfrifiadur microcomputers microgyfrifiadur microcosm microcosm microcosms microcosm microelectronics microelectroneg microfarad microffarad microfarads microffarad microffibril microffibrolyn microffibrils microffibrolyn microfiche microffish microfiches microffish microfilm microffilm microfilms microffilm microhm microhm microhms microhm microlith microlith microliths microlith micrometer micromedr micrometer parts rhannau micromedr micrometer reading darlleniad micromedr micrometer readings darlleniad micromedr micrometers micromedr micrometre micrometr micrometres micrometr micron micron microns micron micronucleus microcnewyllyn micronutrient microfaethyn micronutrients microfaethyn microphone microffon microphones microffon microprocessor microbrosesydd microprocessor control rheolaeth microbrosesydd microprocessor controls rheolaeth microbrosesydd microprocessors microbrosesydd micropyle micropyl micropyles micropyl microscope microsgop microscopes microsgop microscopic microsgopig microscopy microsgopeg microsecond microeiliad microseconds microeiliad microsome microsom microsomes microsom microspore microsbor microspores microsbor microsporophyll microsboroffyl microsporophylls microsboroffyl microswitch microswitsh microswitches microswitsh microtherm microtherm microtherms microtherm microtonal microtonawl microtonality microtonyddiaeth microtone microtôn microtones microtôn microtubule microdiwbyn microtubules microdiwbyn microvillus microfilws microwave microdon microwaves microdon microworld microfyd microworlds microfyd micturate troethi micturition troethiad micturition reflexes atgyrchion troethi micturitions troethiad mid blue glas canol (enamelling colour) mid blues glas canol (enamelling colour) mid brown brown canol (enamelling colour) mid browns brown canol (enamelling colour) mid cadmium yellow melyn cadmiwm canol mid cadmium yellows melyn cadmiwm canol mid chrome yellow melyn crôm canol mid chrome yellows melyn crôm canol mid off canolwr agored mid offs canolwr agored mid on canolwr coes mid ons canolwr coes mid wicket canol wiced mid wickets canol wiced mid-feather slip rhannu mid-feathers slip rhannu mid-latitudes lledredau canol mid-line llinell ganol mid-lines llinell ganol mid-ordinate mesuryn canol mid-ordinate rule dull y mesuryn canol mid-ordinate rules dull y mesuryn canol mid-ordinates mesuryn canol mid-point canolbwynt mid-points canolbwynt mid-west gorllewin canol mid-wests gorllewin canol midbrain ymennydd canol midbrains ymennydd canol middle canol middle C C ganol middle childhood plentyndod canol middle childhoods plentyndod canol middle class dosbarth canol middle cut file ffeil orfras middle cut files ffeil orfras middle distance pellter canol middle distance runner rhedwr pellter canol middle distance runners rhedwr pellter canol middle distances pellter canol middle ear clust ganol middle ears clust ganol middle lamella lamela ganol middle lamellas lamela ganol middle oil olew canol middle oils olew canol middle passage mordaith ganol middle passages mordaith ganol middle rail rheilen ganol middle rails rheilen ganol middle register nodau canol middle school ysgol ganol middle schools ysgol ganol middle stump stwmp canol middle stumps stwmp canol middle tuit tuit canol middle tuits tuit canol middle weight pwysau canol middleman dyn canol middleman's knot cwlwm canolwr middleman's knots cwlwm canolwr middlemans dyn canol middles canol midfield canol cae midfields canol cae midget state corwlad midget states corwlad midland canolbarth midlands canolbarth midrib gwythïen ganol (of leaf) midribs gwythïen ganol (of leaf) midterm break gwyliau hanner tymor midterm breaks gwyliau hanner tymor midway-upwards hanner ffordd i fyny midwife bydwraig midwifery gwaith bydwraig midwifes bydwraig mig welding weldio mig migrant labour llafur mudol migrant labours llafur mudol migrate mudo migration mudiad migrations mudiad migratory mudol mild mwyn (=gentle) mild ysgafn (=not serious) mild disability anabledd ysgafn mild hardwood pren lled galed mild hardwoods pren lled galed mild learning disability anabledd dysgu ysgafn mild steel dur meddal mild steels dur meddal mildew llwydni mildew resistant gwrthlwydni (finish) mildews llwydni mile milltir mile castle caer filltir mile castles caer filltir mile race ras filltir mile races ras filltir milepost postyn milltir mileposts postyn milltir miles milltir milestone carreg filltir milestone ritual defod carreg filltir milestone rituals defod carreg filltir milestones carreg filltir militant milwriaethus militarism militariaeth militarisms militariaeth militarist militarydd militarists militarydd military milwrol military architecture pensaernïaeth filwrol military architectures pensaernïaeth filwrol military base canolfan filwrol military bases canolfan filwrol military history hanes milwrol military service gwasanaeth milwrol military services gwasanaeth milwrol militia milisia militias milisia milium miliwm miliums miliwm milk and dairy foods llaeth a bwydydd llaeth milk products cynnyrch llaeth milk tooth dant sugno milk tooths dant sugno milky llaethog (of lime water) milky suspension daliant llaethog milky suspensions daliant llaethog mill melin mill melino mill race ffrwd melin mill races ffrwd melin millboard bwrdd melin millboards bwrdd melin millenarianism milflwyddiaeth millenarianisms milflwyddiaeth millenium mileniwm milleniums mileniwm miller melinydd millers melinydd millet milet millets milet millibar milibar millibars milibar millilitre mililitr millilitres mililitr millimetre milimetr (mm) millimetres milimetr (mm) milling cutter melinwr milling cutters melinwr milling machine peiriant melino milling machines peiriant melino million miliwn million city dinas filiwn millions miliwn mills melin millstone grit grut melinfaen millstone grits grut melinfaen mimetic dynwaredol mimicry dynwarededd (in biology) mind-body relationship perthynas meddwl-corff mind-body relationships perthynas meddwl-corff mine ffrwydryn (explosive) mine mwyngloddio minelayer llong osod ffrwydrynnau minelayers llong osod ffrwydrynnau miner glöwr (of coal) miner mwynwr (of any mineral) miner's cramp cramp y mwynwr miner's cramps cramp y mwynwr mineral mwyn mineral oil olew mwynol mineral oils olew mwynol mineral origin tarddiad mwynol mineral origins tarddiad mwynol mineral railway rheilffordd fwynau mineral resources adnoddau mwynol mineral salts halwynau mwynol mineral water dŵr mwynol mineral waters dŵr mwynol mineralization mwyneiddiad mineralizations mwyneiddiad mineralogy mwynoleg minerals mwyn miners glöwr (of coal) miners mwynwr (of any mineral) mines ffrwydryn (explosive) minesweeper llong glirio ffrwydrynnau minesweepers llong glirio ffrwydrynnau mini mini mini-enterprise mini-menter mini-enterprises mini-menter mini-floppy disk disg hyblyg bychan mini-floppy disks disg hyblyg bychan mini-project mini-project mini-projects mini-project miniature model (for film work) miniature camera camera mini miniature cameras camera mini miniature painting mân-ddarlun (of painted picture) miniature painting mân-ddarlunio (of process or art) miniature paintings mân-ddarlun (of painted picture) miniature score sgôr boced miniature scores sgôr boced miniatures model (for film work) minicomputer minigyfrifiadur minicomputers minigyfrifiadur minimal minimol minimalism minimaliaeth minimalisms minimaliaeth minimalist minimalaidd minimalist minimalydd minimalists minimalydd minimize lleiafsymio (in mathematics) minimize lleihau (=lessen) minimum isafbwynt (=lowest point) minimum lleiaf (=smallest) minimum agitation cynnwrf byrraf minimum agitations cynnwrf byrraf minimum care lledofal (finish) minimum iron smwddio ysgafn (finish) minimum temperature isafbwynt tymheredd minimum temperatures isafbwynt tymheredd minimum thermometer thermomedr isafbwynt minimum thermometers thermomedr isafbwynt minimum wage isafswm cyflog minimum wages isafswm cyflog minimums isafbwynt (=lowest point) mining mwyngloddio mining industry diwydiant mwyngloddio minister gweinidog minister of public enlightenment and propaganda gweinidog goleuo'r cyhoedd a phropaganda minister's account cyfrif swyddwr minister's accounts cyfrif swyddwr ministers gweinidog ministry gweinidogaeth (of chapel) ministry gweinyddiaeth (=government department) ministry offeiriadaeth (of church) minor lleddf (of musical mood and feeling) minor lleiaf (of musical key) minor plentyn dan oed (of child) minor axis echelin leiaf minor chord cord lleiaf minor chords cord lleiaf minor common chord cord cyffredin lleiaf minor common chords cord cyffredin lleiaf minor diameter diamedr lleiaf minor diameters diamedr lleiaf minor fold plyg bychan minor folds plyg bychan minor illnesses mân anhwylderau minor interval cyfwng lleiaf minor intervals cyfwng lleiaf minor key cywair lleiaf (in music in general) minor key lleddf gywair (in penillion singing) minor order urdd leiaf minor orders urdd leiaf minor road untarred and minor road in towns isffordd heb dar ac isffordd mewn trefi minor scale graddfa leiaf minor scales graddfa leiaf minority lleiafrif minority audience cynulleidfa leiafrifol minority audiences cynulleidfa leiafrifol minority group grŵp lleiafrifol minority groups grŵp lleiafrifol minority language iaith leiafrifol minority languages iaith leiafrifol minority subject pwnc lleiafrifol minority subjects pwnc lleiafrifol minors plentyn dan oed (of child) minstrel clerwr minstrels clerwr minstrels' gallery oriel y clerwyr minstrelsy clerwriaeth mint bath mint bathdy mint bathu mints bathdy minuend minwend minuends minwend minuet miniwét minuets miniwét minus minws minuscule llythrennau bach (lower case) minuscule miniscwl minute bach iawn (=very small) minute cofnod (=record) minute munud (of time) minute book llyfr cofnodion minute books llyfr cofnodion minute-timer cloc munudau minute-timers cloc munudau minutes cofnod (=record) minutes munud (of time) miracle gwyrth miracle play drama firagl miracles gwyrth mirage rhithlun mirages rhithlun mire cramp cramp meir mire cramps cramp meir mirror drych mirror canon drychganon mirror canons drychganon mirror finish gorffeniad drych mirror finishs gorffeniad drych mirror fugue ffiwg ddrych mirror fugues ffiwg ddrych mirror image drychddelwedd mirror images drychddelwedd mirror line llinell ddrych mirror lines llinell ddrych mirror plate plât drych mirror plates plât drych mirror writing drych-ysgrifennu mirrors drych misbehave camymddwyn miscarriage erthyliad naturiol miscarriages erthyliad naturiol miscarry erthylu'n naturiol miscegenation croeshilio mischief rule rheol drygioni mischief rules rheol drygioni miscibility cymysgadwyaeth miscible cymysgadwy miscue analysis dadansoddi'r camddarllen misdemeanour camymddygiad misdemeanours camymddygiad mise meis misericord misericord misericords misericord mises meis misfit river afon afrwydd misfit rivers afon afrwydd mislay camosod mispare cambaru misrule camreoli missal llyfr offeren missals llyfr offeren misshapen di-lun missile taflegryn missile tip treiddiwr taflegryn missile tips treiddiwr taflegryn missiles taflegryn missing tooth dant ar goll missing tooths dant ar goll mission statement datganiad o genhadaeth mission statements datganiad o genhadaeth missionary cenhadwr mist niwlen mist niwlio mistake camgymeriad mistakes camgymeriad mistress meistres mists niwlen misuse camddefnydd misuse camddefnyddio misuse of alcohol camddefnyddio alcohol misuses camddefnydd mite gwiddonyn (arachnid) mites gwiddonyn (arachnid) mitochondrion mitocondrion mitochondrions mitocondrion mitosis mitosis mitotic mitotig mitotic index indecs mitotig mitotic indexes indecs mitotig mitral valve falf feitrol mitral valves falf feitrol mitre meitr mitre meitro mitre block bloc meitr mitre blocks bloc meitr mitre box blwch meitro mitre boxes blwch meitro mitre bridle bagl meitr mitre bridles bagl meitr mitre cramp cramp meitr mitre cramps cramp meitr mitre dovetail meitr cynffonnog mitre dovetails meitr cynffonnog mitre gauge medrydd meitr mitre gauges medrydd meitr mitre joint uniad meitr mitre joints uniad meitr mitre shooting board bwrdd plaenio meitr mitre shooting boards bwrdd plaenio meitr mitre square sgwâr meitro mitre squares sgwâr meitro mitre template patrymlun meitr mitre templates patrymlun meitr mitred meitrog mitred corner cornel feitrog mitred corners cornel feitrog mitred dovetail bridle joint uniad bagl cynffonnog meitrog mitred dovetail bridle joints uniad bagl cynffonnog meitrog mitred dovetail joint uniad cynffonnog meitrog mitred dovetail joints uniad cynffonnog meitrog mitred halving joint uniad haneru meitrog mitred halving joints uniad haneru meitrog mitred joint uniad meitrog mitred joints uniad meitrog mitred tenon tyno meitrog mitred tenons tyno meitrog mitres meitr mitten mit mittens mit mitzvah mitzvah mitzvahs mitzvah mix cymysgu mix and match cyfun-cydwedd mixed cymysg mixed ability gallu cymysg mixed ability class dosbarth gallu cymysg mixed cereal bread bara amyd mixed cereal breads bara amyd mixed dried fruits ffrwythau sych cymysg mixed economy economi cymysg mixed feeding bwydo cymysg mixed key bragod gywair (in old Welsh music) mixed method dull cymysg mixed methods dull cymysg mixed number rhif cymysg mixed numbers rhif cymysg mixed school ysgol gymysg mixed schools ysgol gymysg mixed sex rhyw cymysg mixer cymysgwr sain (in acoustics) mixers cymysgwr sain (in acoustics) mixing medium cyfrwng cymysgu mixing mediums cyfrwng cymysgu mixing palette palet cymysgu mixing palettes palet cymysgu mixing tray hambwrdd cymysgu mixture cymysgedd mixture stop stop cymysg mixture stops stop cymysg mixtures cymysgedd mizzen mast hwylbren canol mizzen masts hwylbren canol mnemonic cofrif mnemonic operation code cod gweithredu cofrif mnemonic operation codes cod gweithredu cofrif mnemonics cofrif moat ffos moats ffos mobile symudol mobile symudyn mobile classroom ystafell ddosbarth symudol mobile classrooms ystafell ddosbarth symudol mobile clinic clinig teithiol mobile clinics clinig teithiol mobile home cartref symudol mobile homes cartref symudol mobile library llyfrgell deithiol mobile phone ffôn symudol mobile phones ffôn symudol mobile shop siop deithiol mobile shops siop deithiol mobiles symudyn mobilistic mobilistig mobility symudedd mobility and flexibility symudedd a hyblygrwydd mobilize ymfyddino (of army) mobilizing movement symudiad llacio mobilizing movements symudiad llacio mock examination ffug arholiad mock examinations ffug arholiad mock-up brasfodel mock-ups brasfodel modal moddol modal class dosbarth modd modality moddolrwydd mode modd mode of address dull cyfarch mode of durations and intensities modd gwerth hyd a dwyster (Messiaen) model model (of female person) model model (of male person, object) model modelu model of nursing model nyrsio model town tref fodel model towns tref fodel modelling modelu modelling assumption tybiaeth fodelu modelling assumptions tybiaeth fodelu modelling board bwrdd modelu modelling boards bwrdd modelu modelling cement sment modelu modelling cements sment modelu modelling clay clai modelu modelling compound cyfansoddyn modelu modelling compounds cyfansoddyn modelu modelling material defnydd modelu modelling materials defnydd modelu modelling stand stand modelu modelling stands stand modelu modelling tools offer modelu modelling wax cwyr modelu modelling waxes cwyr modelu modelling wheel olwyn fodelu modelling wheels olwyn fodelu models model (of female person) models model (of male person, object) modem modem modems modem moderate canolig (=middling) moderate cymedrol (=avoiding extremes) moderate safoni moderate breeze awel gymedrol moderate breezes awel gymedrol moderate learning difficulty anhawster dysgu canolig moderate rainfall glawiad cymedrol moderate rainfalls glawiad cymedrol moderation safoni (of examinations) moderation committee pwyllgor safoni moderation committees pwyllgor safoni moderation meeting cyfarfod safoni moderation meetings cyfarfod safoni moderator cymedrolwr (of person) moderator cymedrolydd (in physics) moderators cymedrolwr (of person) moderators cymedrolydd (in physics) modern modern modern construction adeiladwaith cyfoes modern constructions adeiladwaith cyfoes modern educational dance dawnsio addysgol modern modern foreign language iaith dramor fodern modern foreign languages iaith dramor fodern modern history hanes modern modern language iaith fodern modern languages iaith fodern modern song cân fodern modern songs cân fodern modernize moderneiddio modes modd modification addasiad modifications addasiad modified wedi'i addasu (with masculine nouns) modified wedi'i haddasu (with feminine nouns) modified version fersiwn a addaswyd modified versions fersiwn a addaswyd modify addasu modular modiwlaidd modular arithmetic rhifyddeg fodiwlaidd modular arithmetics rhifyddeg fodiwlaidd modular course cwrs modiwlaidd modular courses cwrs modiwlaidd modular programme rhaglen fodiwlaidd modular programmes rhaglen fodiwlaidd modular programming rhaglennu modiwlaidd modular scheme cynllun modiwlaidd modular schemes cynllun modiwlaidd modularize modiwleiddio modulate goslefu (the speaking voice) modulate modiwleiddio (courses etc) modulate modylu (amplitude or frequency) modulate trawsgyweirio (key in music) modulated modyledig (amplitude or frequency) modulated carrier wave ton gario wedi’i modylu modulated carrier waves ton gario wedi’i modylu modulation modyliad (of amplitude or frequency) modulation trawsgyweiriad (of key in music) modulations modyliad (of amplitude or frequency) modulations trawsgyweiriad (of key in music) modulator cyweiriadur (=diagram for teaching sol-fa) modulator modylydd (=electronic device) modulators cyweiriadur (=diagram for teaching sol-fa) modulators modylydd (=electronic device) module modiwl modules modiwl modulo modwlo modulus modwlws modulus of elasticity modwlws elastigedd mogul mogwl moguls mogwl mohair moher mohairs moher moist llaith moisture lleithder moisture content cynnwys lleithder moisture contents cynnwys lleithder moisture expansion ymlediad lleithder moisture expansions ymlediad lleithder moistures lleithder moksha / moksa moksha / moksa moksha / moksas moksha / moksa mol dm-3 môl dm-3 mol dm-3s môl dm-3 molal molal molality molaledd molar cilddant (tooth) molar molar (in chemistry) molar mass màs molar molar ratio cymhareb folar molar volume cyfaint molar molar volumes cyfaint molar molarity molaredd molars cilddant (tooth) mole gwahadden (=small mammal) mole môl (unit in chemistry) mole wrench tyndro hunanafael mole wrenches tyndro hunanafael molecular moleciwlaidd molecular chaos caos moleciwlaidd molecular formula fformiwla foleciwlaidd molecular formulas fformiwla foleciwlaidd molecular mass màs moleciwlaidd molecular structure adeiledd moleciwlaidd molecular structures adeiledd moleciwlaidd molecularity moleciwledd molecule moleciwl molecules moleciwl moles gwahadden (=small mammal) moles môl (unit in chemistry) molinia gwellt y gweunydd molinias gwellt y gweunydd mollusc molwsg molluscs molwsg molten tawdd (of metal) molten iron haearn tawdd molten irons haearn tawdd molten lava lafa tawdd molten lavas lafa tawdd molten metal metel tawdd molten metals metel tawdd molten salts halwynau tawdd (cooling media) molybdenum molybdenwm (Mo) molybdenums molybdenwm (Mo) moment moment (=turning effect of force) moment of inertia moment inertia moment of momentum moment momentwm momentary enydol moments moment (=turning effect of force) momentum momentwm momentums momentwm monadnock monadnoc monadnocks monadnoc monarch brenhines (female) monarch brenin (male) monarch glöyn y llaethlys (of butterfly) monarches brenhines (female) monarches brenin (male) monarches glöyn y llaethlys (of butterfly) monarchism brenhiniaeth monarchisms brenhiniaeth monarchist brenhinwr monarchists brenhinwr monarchy brenhiniaeth monastery mynachlog monastic mynachaidd monasticism mynachaeth monasticisms mynachaeth monatomic monatomig monestial blue glas monestial monestial blues glas monestial monetarism arianolaeth monetarisms arianolaeth monetarist arianyddwr monetarists arianyddwr monetary ariannol monetary policy polisi ariannol money arian money allocated to schools arian a ddyrennir i ysgolion money economy economi arian money order archeb arian money orders archeb arian monic monig monism monyddiaeth monisms monyddiaeth monitor monitor (=screen) monitor monitor (of person) monitor monitro monitors monitor (=screen) monitors monitor (of person) monk mynach monk's belt pattern patrwm gwregys y mynach monk's belt patterns patrwm gwregys y mynach monk-bishop mynach-esgob monk-bishops mynach-esgob monkish mynachaidd monks mynach mono mono monochromatic monocromatig monochrome monocrom monochromes monocrom monocline monoclin monoclines monoclin monocormic monocormig monocotyledon monocotyledon monocotyledons monocotyledon monoculture ungnwd monocultures ungnwd monocyte monocyt monocytes monocyt monodic monodig monodrama monodrama monodramas monodrama monodromy monodromi monoecious monoecaidd monogamy monogami monogenic monogenig monogenics monogenig monogram monogram monograms monogram monograph monograff monographs monograff monohybrid monohybrid monohybrid inheritance etifeddiad monocroesryw monohybrid inheritances etifeddiad monocroesryw monohybrids monohybrid monolingual uniaith monolith monolith monolithic monolithig monoliths monolith monomer monomer monomeric monomerig monomers monomer monomial monomaidd monomial monomial monomials monomial monophonic monoffonig monophony monoffoni monopolise monopoleiddio monopolistic competition cystadleuaeth fonopolistaidd monopolistic competitions cystadleuaeth fonopolistaidd monopoly monopoli monopsony monopsoni monosaccharide monosacarid monosaccharides monosacarid monosomy monosomi monospaced unlled monostable unsad monotheism undduwiaeth monotheisms undduwiaeth monotone monoton monotonic monotonig monotreme monotrem monotremes monotrem monotropic monotropig monotype monoteip monotypes monoteip monozygotic monosygotig monsoon monsŵn monsoons monsŵn montage montage montages montage monument cofadail monuments cofadail mood awyrgylch (in dance) mood hwyl (of person) mood naws (in art, music etc) moods awyrgylch (in dance) moods hwyl (of person) moods naws (in art, music etc) moon lleuad moon in orbit lleuad mewn orbit moon wane ciliad y lleuad moon wanes ciliad y lleuad moon wax cynnydd y lleuad moon waxes cynnydd y lleuad moonquake lloergryn moonquakes lloergryn moons lleuad mooring angorfa moorings angorfa moorland gweundir moorland gweundirol moorlands gweundir moorpan cletir hwmws moorpans cletir hwmws moose elc mooses elc mop mop moraine marian moraine dammed lake cronlyn marian moraine dammed lakes cronlyn marian moraines marian moral moesol moral aspect agwedd foesol moral aspects agwedd foesol moral development datblygiad moesol moral developments datblygiad moesol moral education addysg foesol moral educations addysg foesol moral evil drygioni moesol moral evils drygioni moesol moral force grym moesol moral forces grym moesol moral matter mater moesol moral matters mater moesol moral panic panig moesol moral panics panig moesol moral standard safon foesol moral standards safon foesol moral tutor tiwtor moesol moral tutors tiwtor moesol morality moesoldeb morals moesau morbidity morbidrwydd mordant mordant mordants mordant mordent mordent mordents mordent more economically developed countries gwledydd mwy economaidd ddatblygedig (MEDCs) morphological morffolegol morphology morffoleg morris dance dawns forris morris dancer dawnsiwr morris morris dancers dawnsiwr morris morris dances dawns forris mortality marwoldeb mortality rate cyfradd marwolaethau mortality rates cyfradd marwolaethau mortar morter mortars morter mortgage morgais mortgage repayment ad-daliad morgais mortgage repayments ad-daliad morgais mortgager morgeisydd mortgagers morgeisydd mortgages morgais morticing machine peiriant morteisio morticing machines peiriant morteisio mortise mortais mortise and tenon joint uniad mortais a thyno mortise and tenon joints uniad mortais a thyno mortise chisel cŷn mortais mortise chisels cŷn mortais mortise lock clo mortais mortise locks clo mortais mortises mortais mortlake ystumllyn mortlakes ystumllyn mortmain tir llaw farw mortmains tir llaw farw mortuary corffdy mortuary fee ffi gladdu mortuary fees ffi gladdu mosaic mosaig mosaic image delwedd fosaig mosaic images delwedd fosaig mosaic tile teilsen fosaig mosaic tiles teilsen fosaig mosaics mosaig mosque mosg mosques mosg moss mwsogl moss size preservative cadwolyn seis mwsogl moss size preservatives cadwolyn seis mwsogl moss stitch pwyth mwsogl moss stitches pwyth mwsogl most significant bit did mwyaf arwyddocaol (MSB) most significant bits did mwyaf arwyddocaol (MSB) motel motel motels motel motet motét motets motét moth gwyfyn moth balls peli camffor mother cell mamgell mother cells mamgell mother country mamwlad mother liquor hylif bwrw mother liquors hylif bwrw mother of pearl cloud cwmwl symudliw mother tongue mamiaith mother tongues mamiaith mother-abbey mam-abaty mother-church mam-eglwys mother-churches mam-eglwys mothercraft crefft y fam mothercrafts crefft y fam mothproof gwrthwyfyn mothproof gwrthwyfynu mothproofing gwrthwyfynu moths gwyfyn motif motiff motifs motiff motile mudol motion mudiant motion in a circle mudiant mewn cylch motionless llonydd motions mudiant motivate symbylu motivation cymhelliant (incentive or encouragement) motivation symbyliad (=impulse) motivational factor ffactor cymhelliant motivational factors ffactor cymhelliant motivational theory damcaniaeth cymhelliant motivations cymhelliant (incentive or encouragement) motivations symbyliad (=impulse) motive cymhelliad motives cymhelliad motivism cymhelliaeth motivisms cymhelliaeth motor echddygol (=efferent) motor modur (=machine) motor bicycle beic modur motor bicycles beic modur motor control rheolaeth dros symudiadau motor controls rheolaeth dros symudiadau motor defect diffyg echddygol motor defects diffyg echddygol motor end-plate terfynblat echddygol motor end-plates terfynblat echddygol motor impulse ysgogiad echddygol motor impulses ysgogiad echddygol motor nerve nerf echddygol motor nerves nerf echddygol motor pathway llwybr echddygol motor root gwreiddyn echddygol motor roots gwreiddyn echddygol motor skill sgìl symud motor skills sgìl symud motor terminal terfynell echddygol motor terminals terfynell echddygol motor traffic trafnidiaeth foduron motor traffics trafnidiaeth foduron motorised blower peiriant chwythu motorised blowers peiriant chwythu motors modur (=machine) motorway traffordd motorway under construction traffordd yn cael ei hadeiladu motorway under constructions traffordd yn cael ei hadeiladu motte and bailey tomen a beili motte and bailey castle castell tomen a beili motte and bailey castles castell tomen a beili mottled brith mottling brychu (in finishing metal) mould llwydni (=fungal growth) mould mowld (=hollow container) mould mowldio moulded shank button botwm garan fowld moulded shank buttons botwm garan fowld moulder's tools arfau mowldiwr moulding mowldin moulding bench mainc fowldio moulding benches mainc fowldio moulding board bwrdd mowldio moulding boards bwrdd mowldio moulding box blwch mowldio moulding boxes blwch mowldio moulding flask fflasg fowldio moulding flasks fflasg fowldio moulding plane plaen mowldio moulding planes plaen mowldio moulding sand tywod mowldio moulding sands tywod mowldio mouldings mowldin moulds llwydni (=fungal growth) moulds mowld (=hollow container) mouldy bread bara wedi llwydo mouldy breads bara wedi llwydo moult bwrw moulting glands chwarennau ecdysaidd mount mownt mount mowntio mountain pasture porfa fynydd mountain pastures porfa fynydd mountain range cadwyn o fynyddoedd mountain ranges cadwyn o fynyddoedd mountain rescue post safle achub ar fynydd mountain rescue posts safle achub ar fynydd mountaineering mynydda mountaineering association cymdeithas fynydda mountaineering associations cymdeithas fynydda mounted mowntiedig mounted lino block bloc leino mowntiedig mounted lino blocks bloc leino mowntiedig mounting mowntin mounting board bwrdd mowntio mounting boards bwrdd mowntio mounting plate plât mowntio mounting plates plât mowntio mountings mowntin mounts mownt mourn galaru mouse llygoden mouse-tail file ffeil fach fain gron mouse-tail files ffeil fach fain gron mouses llygoden mouth aber (of river) mouth ceg (in general) mouth organ organ geg mouth organs organ geg mouth-moving pliers gefelen geg-symudol mouth-to-mouth respiration anadlu ceg wrth geg mouth-to-mouth resuscitation adfywio ceg wrth geg mouthparts gên-rannau mouthpiece ceg offeryn (of musical instrument) mouthpiece llefarydd (=spokesperson) mouthpieces ceg offeryn (of musical instrument) mouthpieces llefarydd (=spokesperson) mouths aber (of river) mouths ceg (in general) mouthwash cegolch mouthwashs cegolch movable symudol movable guide cyfeirydd symudol movable guides cyfeirydd symudol movable jaw safn symudol movable jaws safn symudol movable joint cymal symudol movable joints cymal symudol movable pin pìn symudol movable pins pìn symudol move symud move around the court symud o gwmpas y cwrt move around the courts symud o gwmpas y cwrt move fluently symud yn rhwydd movement symudiad (in general) movement ymsymudiad (=locomotion) movement allowance lwfans symudiad movement allowances lwfans symudiad movements symudiad (in general) movements ymsymudiad (=locomotion) mover symudydd movers symudydd moving average cyfartaledd newidiol moving averages cyfartaledd newidiol moving coil coil symudol moving coil galvanometer galfanomedr coil symudol moving coil galvanometers galfanomedr coil symudol moving coil microphone microffon coil symudol moving coil microphones microffon coil symudol moving coils coil symudol moving in pairs symud mewn parau moving in time symud mewn amser moving jaw safn symudol moving jaws safn symudol moving phase symudwedd moving phases symudwedd moving shadows cysgodion symudol moving steady sadydd symudol moving-iron repulsion meter mesurydd gwrthyriad haearn symudol moving-iron repulsion meters mesurydd gwrthyriad haearn symudol mucilage mwcilag mucilages mwcilag mucin mwcin mucins mwcin mucoprotein mwcoprotein mucoproteins mwcoprotein mucosa mwcosa mucosas mwcosa mucous mwcaidd mucous gland chwarren fwcaidd mucous glands chwarren fwcaidd mucous membrane pilen fwcaidd mucous membranes pilen fwcaidd mud llaid mud flats fflatiau llaid mud pellet pelen laid mud pellets pelen laid mud-flow lleidlif mud-flows lleidlif mudstone carreg laid mudstones carreg laid muffle furnace ffwrnais fwffwl muffle furnaces ffwrnais fwffwl muffle loading kiln odyn fwffl-lwytho muffle loading kilns odyn fwffl-lwytho muggy mwll mulberry paper papur morwydd mulberry papers papur morwydd mulga mylga mulgas mylga mull mwl (soil) mullion mwliwn mullions mwliwn mulls mwl (soil) multi skilled workforce gweithlu sgiliau lluosog multi skilled workforces gweithlu sgiliau lluosog multi-access amlfynediad multi-chrome lluosliw multi-ethnic amlhiliol multi-infarct dementia gorddryswch amlgnawdnychol multi-infarct dementias gorddryswch amlgnawdnychol multi-lobed aml-labedog multi-lobed nucleus cnewyllyn aml-labedog multi-media course cwrs amlgyfrwng multi-media courses cwrs amlgyfrwng multi-page aml-dudalen multi-part memory cof amlran multi-part paper papur amlran multi-part papers papur amlran multi-peninsular amlbenrhynnol multi-ply pren amlhaenog multi-ply door drws pren amlhaenog multi-ply doors drws pren amlhaenog multi-plywood pren amlhaenog multi-plywoods pren amlhaenog multi-precision arithmetic rhifyddeg amldrachywiredd multi-precision arithmetics rhifyddeg amldrachywiredd multi-programming amlraglennu multi-purpose pattern patrwm amlbwrpas multi-purpose patterns patrwm amlbwrpas multi-range amlamrediad multi-sensory amlsynhwyraidd multi-sensory deprivation diffyg amlsynhwyraidd multi-sensory deprivations diffyg amlsynhwyraidd multi-size pattern patrwm amlfaint multi-size patterns patrwm amlfaint multi-stage amlran multi-storey amrylawr multi-tasking amlorchwyl multi-textured amlwead multi-tone amldon multi-tool post post amlerfyn multi-tool posts post amlerfyn multi-track amldrac multi-user amlddefnyddiwr multi-users amlddefnyddiwr multi-valued lluoswerth multi-valved amlfalfog multicellular amlgellog multichrome amryliw multicultural amlddiwylliannol multicultural aspects of sport agweddau amlddiwylliannol ar chwaraeon multicultural society cymdeithas amlddiwylliannol multidigit amlddigid multidisciplinary team tîm amlddisgyblaethol multidisciplinary teams tîm amlddisgyblaethol multifactorial amlffactoraidd multifactorial inheritance etifeddiad amlffactoraidd multifactorial inheritances etifeddiad amlffactoraidd multifill aml-lenwi multiflash amlfflach multiflashs amlfflach multifunctional amlswyddogaethol multilateral amlochrog multilevel aml-lefel multimedia amlgyfrwng multimeter amlfesurydd multimeters amlfesurydd multimodal amlfodd multinational rhyngwladol multinational company cwmni amlwladol multinominal lluosnomaidd multinominal lluosnominal multinominals lluosnominal multiple lluosol multiple lluosrif multiple allelomorph alelomorff lluosrif multiple allelomorphs alelomorff lluosrif multiple angles onglau cyfansawdd multiple bond bond lluosol multiple bonds bond lluosol multiple choice dewis lluosog multiple choices dewis lluosog multiple correlation aml gydberthyniad multiple correlations aml gydberthyniad multiple disabilities anableddau amryfal multiple graver crafell luosbig multiple gravers crafell luosbig multiple injuries anafiadau niferus multiple personality disorder anhwylder personoliaeth luosog multiple personality disorders anhwylder personoliaeth luosog multiple poles pegynau cyfansawdd multiple proportion cyfrannedd lluosol multiple proportions cyfrannedd lluosol multiple store siop gadwyn multiple stores siop gadwyn multiple track amldrac multiple tracks amldrac multiple-choice question cwestiwn dewis lluosog multiple-choice questions cwestiwn dewis lluosog multiples lluosrif multiplex amlbleth (digital compression of tv channels) multiplex cinema sinema aml-sgrîn multiplex cinemas sinema aml-sgrîn multiplexer amlblecsydd multiplexers amlblecsydd multiplexing amlblecsu multiplicand lluosyn multiplicands lluosyn multiplication lluosiad multiplication sign arwydd lluosi multiplication signs arwydd lluosi multiplications lluosiad multiplicative lluosol multiplicity lluosogrwydd multiplier lluosydd multiplier effect effaith luosydd multipliers lluosydd multiply lluosi multiprocessor system system amlbrosesydd multiprocessor systems system amlbrosesydd multiseeded amlhadog multistranded amledau multivariate analysis dadansoddiad amlamrywedd multivibrator amlddirgrynydd multivibrators amlddirgrynydd multiview amlolwg multivoque amlddrychigaeth multivoques amlddrychigaeth mung beans ffa mwng municipal trefol munitions arfau rhyfel muntin mwntin muntins mwntin murage murdreth murages murdreth mural murlun mural murol mural brush brwsh murlun mural brushs brwsh murlun mural composition cyfansoddiad murol mural compositions cyfansoddiad murol mural decorations addurniadau murol mural ground grwnd murol mural grounds grwnd murol murals murlun murder llofruddiaeth murderer llofrudd murderers llofrudd murders llofruddiaeth muscle cyhyr (in general) muscle cyhyrol muscle cyhyryn (a specific one / type) muscle attachment cydfan cyhyrau muscle attachments cydfan cyhyrau muscle contraction cyfangiad cyhyrol muscle contractions cyfangiad cyhyrol muscle fatigue lludded cyhyrol muscle fatigues lludded cyhyrol muscle fibre ffibr cyhyrau muscle fibre type math o ffibr cyhyrau muscle fibre types math o ffibr cyhyrau muscle fibres ffibr cyhyrau muscle mass màs y cyhyrau muscle tissue meinwe cyhyrau muscle tissues meinwe cyhyrau muscles cyhyr (in general) muscles cyhyryn (a specific one / type) muscular dystrophy nychdod cyhyrol muscular endurance dygnwch y cyhyrau muscular endurances dygnwch y cyhyrau muscular strength cryfder cyhyrau muscular strengths cryfder cyhyrau muscular system system gyhyrol muscular systems system gyhyrol musculature cyhyredd musculatures cyhyredd musculocutaneous cyhyr-groenol musette musette musettes musette museum amgueddfa museum school service gwasanaeth amgueddfa i ysgolion museum school services gwasanaeth amgueddfa i ysgolion museums amgueddfa mushroom madarchen mushroom head rivet rhybed pen madarch mushroom head rivets rhybed pen madarch mushroom heads pennau madarch mushroom stake bonyn madarchen mushroom stakes bonyn madarchen mushroom-like madarchaidd mushrooming madarchu mushrooms madarchen music cerddoriaeth music adjudicator beirniad cerdd music adjudicators beirniad cerdd music drama drama gerdd music dramas drama gerdd music hall theatr gerdd music halls theatr gerdd music of Wales cerddoriaeth Cymru music stand stand cerddoriaeth music stands stand cerddoriaeth music synthesis synthesis cerddoriaeth musical cerddorol musical sioe gerdd musical accompaniment cyfeiliant cerddorol musical accompaniments cyfeiliant cerddorol musical comedy comedi gerdd musical element elfen gerddorol musical elements elfen gerddorol musical heritage treftadaeth gerddorol musical heritages treftadaeth gerddorol musical idea syniad cerddorol musical ideas syniad cerddorol musical instruction cyfarwyddyd cerddorol musical instructions cyfarwyddyd cerddorol musical instrument offeryn cerdd musical instruments offeryn cerdd musical pattern patrwm cerddorol musical patterns patrwm cerddorol musical scene maes cerddorol musical scenes maes cerddorol musical stimulus ysgogiad cerddorol musical style arddull cerddorol musical styles arddull cerddorol musicals sioe gerdd musician cerddor musicians cerddor musics cerddoriaeth musk mwsg muskeg mysceg muskegs mysceg musket mysged musketeer mysgedwr musketeers mysgedwr muskets mysged musks mwsg muslin mwslin muslins mwslin mustelid carlymoliad mustelids carlymoliad muster mwstro muster mwstwr muster master meistr mwstro muster masters meistr mwstro musters mwstwr mutagen mwtagen mutagenesis mwtagenedd mutagenic mwtagenaidd mutagens mwtagen mutant mwtan mutants mwtan mutate mwtanu mutation mwtaniad (in genetics) mutations mwtaniad (in genetics) mute mud mute mud (of person) mute mudydd (device in music) mute pylu (in music, of drums) mute rhoi mudydd ar (in music, of stringed instruments) muted tawel (of colour) muted colour lliw tawel muted colours lliw tawel mutes mud (of person) mutes mudydd (device in music) mutilate anffurfio mutiny miwtini mutual electrostatic repulsion cyd-wrthyriant electrostatig mutual electrostatic repulsions cyd-wrthyriant electrostatig mutual inductance cydanwythiant mutual inductances cydanwythiant mutual induction cydanwythiad mutual inductions cydanwythiad mutualism cydymddibyniaeth mutualisms cydymddibyniaeth mutually perpendicular cydberpendicwlar muzzle trwyn muzzles trwyn mycelium myceliwm myceliums myceliwm mycology mycoleg mycorrhiza mycorhisa mycorrhizal mycorhisol mycorrhizas mycorhisa myelin myelin myelin sheath pilen fyelin myelin sheaths pilen fyelin myelinated myelinedig myelinated fibre edefyn myelinedig myelinated fibres edefyn myelinedig myelins myelin myeloid myeloid myofibrol myoffibrolyn myofibrols myoffibrolyn myogenic myogenig myoglobin myoglobin myoglobins myoglobin myomer myomer myomers myomer myopia myopia myopias myopia myopic byr yr olwg myosin myosin myosins myosin mystery play drama firagl mystic cyfriniwr mystical cyfriniol mysticism cyfriniaeth mysticisms cyfriniaeth mystics cyfriniwr myth myth mythical mytholegol mythology mytholeg myths myth myxoedema mycsoedema myxoedemas mycsoedema myxovirus mycsofirws n-fold degenerate dirywiedig n-blyg nacreous cloud cwmwl symudliw nacreous clouds cwmwl symudliw nadir nadir nadirs nadir nail hoelen nail hoelio nail punch pwnsh hoelion nail punches pwnsh hoelion nail-head ornament addurn pen hoelen nail-head ornaments addurn pen hoelen nails hoelen naked noeth naked figure ffigur noeth naked figures ffigur noeth named activity gweithgaredd a enwir named nurse nyrs benodol named nurses nyrs benodol named person person a enwir named persons person a enwir nano-ammeter nano-amedr nano-ammeters nano-amedr nanometre nanometr nanometres nanometr nanosecond nano-eiliad nanoseconds nano-eiliad nap ceden (textile) nap cedenu (textile) nape-to-waist o'r gwegil i'r wasg naphtha nafftha naphthalene naffthalen naphthalene acetic acid NAA asid naffthalen asetig ANA naphthalenes naffthalen naphthas nafftha napkin napcyn napkins napcyn nappy cewyn nappy rash brech cewyn nappy rashs brech cewyn narcissism hunan-serch narcissisms hunan-serch nardus cawnen ddu narration adroddiad narrations adroddiad narrative naratif narrative traethiadol narrative art celfyddyd draethiadol narrative arts celfyddyd draethiadol narrative code cod naratif narrative codes cod naratif narrative film ffilm naratif narrative films ffilm naratif narrative sequencing dilyniant naratif narrative sequencings dilyniant naratif narrative structure strwythur y naratif narrative structures strwythur y naratif narrative tradition traddodiad storïol narrative traditions traddodiad storïol narratives naratif narrator adroddwr narrators adroddwr narrow cul narrow culhau narrow gauge railway lein fach narrow gauge track trac cul narrow gauge tracks trac cul narrow leaved cul-ddeiliog narrow road with passing places ffordd gul gyda lleoedd pasio narrow stroke strôc gul narrow strokes strôc gul narrowcasting targedu cyfyng narrowing the angle culhau'r ongl narrowness culni narrows culfa nasal trwynol nasal cavity ceudod trwynol nasal tone sain drwynol nasal tones sain drwynol nascent genedigol nasopharyngeal nasoffaryngeal nastic nastig nastic movement symudiad nastig nastic movements symudiad nastig nation cenedl nation state gwladwriaeth genedlaethol nation states gwladwriaeth genedlaethol national cenedlaethol (of nation, not state) national gwladol (of state) national account cyfrif gwladol national accounts cyfrif gwladol national anthem anthem genedlaethol national anthems anthem genedlaethol national average cyfartaledd gwladol national averages cyfartaledd gwladol national awareness ymwybyddiaeth genedlaethol national context cyd-destun cenedlaethol national contexts cyd-destun cenedlaethol national costume gwisg genedlaethol national costumes gwisg genedlaethol national curriculum cwricwlwm cenedlaethol national curriculums cwricwlwm cenedlaethol national dances dawnsiau cenedlaethol national debt dyled wladol national debts dyled wladol national identity hunaniaeth genedlaethol national income incwm gwladol national incomes incwm gwladol national literacy strategy strategaeth llythrennedd cenedlaethol national register cofrestr genedlaethol national registers cofrestr genedlaethol national standard safon genedlaethol national standards safon genedlaethol nationalism cenedlaetholdeb nationalisms cenedlaetholdeb nationalist cenedlaetholgar nationalist cenedlaetholwr nationalists cenedlaetholwr nationality dinasyddiaeth (=citizenship) nationalization gwladoliad nationalizations gwladoliad nationalize gwladoli nationalized industry diwydiant gwladoledig nationally prescribed test prawf a osodir yn genedlaethol nationally prescribed tests prawf a osodir yn genedlaethol nationhood cenedligrwydd nationhoods cenedligrwydd nations cenedl native brodor native brodorol native protein protein cynhenid native proteins protein cynhenid native resistance gwrthsafiad y brodorion native resistances gwrthsafiad y brodorion natives brodor natural naturiol natural boundary conditions amodau ffin naturiol natural colour lliw naturiol natural colours lliw naturiol natural defects diffygion naturiol (in timber) natural defence amddiffynfa naturiol natural defences amddiffynfa naturiol natural environment amgylchedd naturiol natural environments amgylchedd naturiol natural evil drygioni naturiol natural evils drygioni naturiol natural fibre ffibr naturiol natural fibres ffibr naturiol natural finish gorffeniad naturiol natural finishs gorffeniad naturiol natural form ffurf naturiol natural forms ffurf naturiol natural gas nwy naturiol natural grass gwair naturiol natural grit grit naturiol natural grits grit naturiol natural immunity imiwnedd cynhenid natural justice cyfiawnder cynhenid natural justices cyfiawnder cynhenid natural language iaith naturiol natural languages iaith naturiol natural law deddf naturiol natural laws deddf naturiol natural light golau naturiol natural lights golau naturiol natural logarithm logarithm naturiol natural logarithms logarithm naturiol natural monopoly monopoli naturiol natural note nodyn naturiol natural notes nodyn naturiol natural number rhif naturiol natural numbers rhif naturiol natural object gwrthrych naturiol natural objects gwrthrych naturiol natural regions rhanbarthau naturiol natural resources adnoddau naturiol natural seasoning sychu naturiol (of wood) natural selection dethol naturiol natural sign arwydd naturiol natural signs arwydd naturiol natural teaching medium cyfrwng addysgu naturiol natural teaching mediums cyfrwng addysgu naturiol natural trumpet utgorn naturiol natural trumpets utgorn naturiol natural twine cortyn naturiol natural twines cortyn naturiol natural wastage gwastraff naturiol natural wastages gwastraff naturiol naturalism naturoliaeth naturalisms naturoliaeth naturalistic naturiolaidd naturalize cynefino (in biology) naturalize derbyn yn ddinesydd (=accept as citizen) nature natur nature of scientific activity natur gweithgaredd gwyddonol nature reserve gwarchodfa natur nature reserves gwarchodfa natur nature table bwrdd natur nature tables bwrdd natur nature trail llwybr natur nature trails llwybr natur natures natur nausea cyfog nauseas cyfog nautical mile morfilltir (knot) nautical miles morfilltir (knot) naval llyngesol naval base canolfan llynges naval bases canolfan llynges naval blockade gwarchae o'r môr naval blockades gwarchae o'r môr naval history hanes llyngesol naval officer swyddog y llynges naval officers swyddog y llynges naval power grym llyngesol naval powers grym llyngesol naval ship llong y llynges naval ships llong y llynges nave both (of wheel) naves both (of wheel) navigable mordwyol navigation mordwyo navy llynges naze trwyn nazes trwyn naïve diniwed neap tide llanw bach neap tides llanw bach near abstract lled-haniaethol near bankful gogyforlan near bankfuls gogyforlan near future dyfodol agos near futures dyfodol agos near point agosbwynt near points agosbwynt near side ochr agosaf near sides ochr agosaf nearest neighbour cymydog agosaf nearest neighbour analysis dadansoddiad cymydog agosaf nearest neighbours cymydog agosaf neat appearance ymddangosiad destlus neat appearances ymddangosiad destlus neatness taclusrwydd nebula nifwl nebulas nifwl nebulizer nebiwlydd nebulizers nebiwlydd nebulous niwlog necessaries angenrheidiau necessary angenrheidiol necessary and sufficient angenrheidiol a digonol necessity rheidrwydd neck crib (of harp) neck gwddf (in general) neck gyddfu neck of racket gwddf y raced neck-to-waist o'r gwddf i'r wasg necking gyddfu necklace neclis necklaces neclis neckline llinell gwddf necklines llinell gwddf necks crib (of harp) necks gwddf (in general) neckspring sbring gwar necksprings sbring gwar nectar neithdar nectars neithdar nectary neithdarle need angen needle nodwydd needle clamp clamp nodwydd (of machine part) needle clamps clamp nodwydd (of machine part) needle file ffeil nodwydd needle files ffeil nodwydd needle leaves dail nodwydd needle point blaen nodwydd needle points blaen nodwydd needle position control rheolydd safle'r nodwydd (of machine part) needle position controls rheolydd safle'r nodwydd (of machine part) needle threader edefydd nodwydd needle threaders edefydd nodwydd needlecord melfaréd main needlecords melfaréd main needlecraft crefft nodwydd needlecrafts crefft nodwydd needled carpet carped nodwyddog needled carpets carped nodwyddog needlepoint gwaith blaen nodwydd needlepoint edging ymylwaith blaen nodwydd needlepoint edgings ymylwaith blaen nodwydd needlepoints gwaith blaen nodwydd needles nodwydd needleweaving gwehyddwaith nodwydd needleweavings gwehyddwaith nodwydd needlework gwniadwaith needleworks gwniadwaith needs angen needs analysis dadansoddiad o anghenion needs assessment asesiad o anghenion needs assessments asesiad o anghenion needs of the user gofynion y defnyddiwr negate negyddu negation of time negyddiad amser (Messiaen) negative negatif (in photography) negative negatif (of charge) negative negyddol (in general sense) negative carving cerfio negatif negative charge gwefr negatif negative charges gwefr negatif negative externality allanoldeb negatif negative feedback adborth negatif (of signal) negative feedbacks adborth negatif (of signal) negative image delwedd negyddol negative images delwedd negyddol negative number rhif negatif negative numbers rhif negatif negative polarity polaredd negatif negative rake gwyredd negatif negative rakes gwyredd negatif negative reinforcement atgyfnerthu negyddol negative response ymateb negyddol negative responses ymateb negyddol negative self-concept hunanddelwedd negyddol negative self-concepts hunanddelwedd negyddol negative skew sgiw negatif negative skews sgiw negatif negative variance amrywiant negyddol negative variances amrywiant negyddol negatives negatif (in photography) negativity negatifedd neglect esgeuluso neglect esgeulustod neglects esgeulustod negligence esgeulustod negligences esgeulustod negligible dibwys negligible thickness trwch y gellir ei anwybyddu negotiate a settlement trafod telerau cytundeb negotiation trafodaeth negotiations trafodaeth nehrung bardraeth (=barrier beach) nehrungs bardraeth (=barrier beach) neighbour cymydog neighbour test prawf cymydog neighbour tests prawf cymydog neighbourhood cymdogaeth neighbourhood unit uned gymdogaeth neighbourhood units uned gymdogaeth neighbourhoods cymdogaeth neighbouring cyfagos neighbourliness cymdogrwydd neighbours cymydog nematocyst nematocyst nematocysts nematocyst nematode nematod nematodes nematod neo-Gothic neo-Gothig neo-Malthusianism neo-Malthwsiaeth neo-Romantic neo-Ramantaidd neo-impressionism neoargraffiadaeth neo-impressionisms neoargraffiadaeth neoclassical neoglasurol neoclassicism neoglasuriaeth neoclassicisms neoglasuriaeth neodymium neodymiwm (Nd) neodymiums neodymiwm (Nd) neoglaciation neorewlifiant neoglaciations neorewlifiant neolithic neolithig neon neon (Ne) neonatal newydd-anedig neonatal jaundice clefyd melyn y newydd-anedig neonatal jaundices clefyd melyn y newydd-anedig neonate newydd-anedig neonates newydd-anedig neons neon (Ne) nephridium neffridiwm nephridiums neffridiwm nephron neffron nephrons neffron nepotism nepotistiaeth nepotisms nepotistiaeth nepotist nepotydd nepotists nepotydd neptunium neptwniwm (Np) neptuniums neptwniwm (Np) neritic deposits dyddodion neritig nerve nerf nerve cell nerfgell nerve cells nerfgell nerve deafness byddardod nerfol nerve ending terfyn nerf nerve endings terfyn nerf nerve fibre edefyn nerf nerve fibres edefyn nerf nerve impulse ysgogiad nerfol nerve impulses ysgogiad nerfol nerve net nerfrwyd nerve nets nerfrwyd nerve root nerfwreiddyn nerve roots nerfwreiddyn nerve supply cyflenwad nerfol nerves nerf nervous nerfol (of anatomy) nervous nerfus (of person) nervous conduction dargludiad nerfol nervous conductions dargludiad nerfol nervous system system nerfol nervous systems system nerfol nervous tissue meinwe nerfol nervous tissues meinwe nerfol nervule nerfolyn nervules nerfolyn nest egg wy addod nest eggs wy addod nest of tables nythaid o fyrddau (of furniture) nested hierarchy hierarchaeth nythog nested loop dolen nythol nested loops dolen nythol net net (=after deductions) net rhwyd net assets asedau net net book value gwerth net ar bapur net book values gwerth net ar bapur net capital cyfalaf net net capitals cyfalaf net net cord cortyn rhwyd net cords cortyn rhwyd net count rate cyfrif cyfradd net net count rates cyfrif cyfradd net net current gwir gerrynt net currents gwir gerrynt net drift drifft canlyniadol (=drift in minus drift out) net drifts drifft canlyniadol (=drift in minus drift out) net effect gwir effaith net effects gwir effaith net energy gain cynnydd egni net net energy gains cynnydd egni net net export allforyn net net exports allforyn net net force gwir rym net forces gwir rym net gain enillion net net income incwm net net incomes incwm net net investment buddsoddiad net net investments buddsoddiad net net loss colled net net movement gwir symudiad net movements gwir symudiad net pay cyflog net net present value gwerth presennol net net present values gwerth presennol net net profit elw net net profit figure ffigwr elw net net profit figures ffigwr elw net net profits elw net net register tonnage tunelledd cofrestredig net net register tonnages tunelledd cofrestredig net net the ball rhwydo'r bêl net weight pwysau net netball pêl-rwyd netballs pêl-rwyd network rhwydwaith network rhwydweithio network architecture saernïaeth rwydwaith network architectures saernïaeth rwydwaith network flows dylifiadau rhwydwaith network of blood-vessels rhwydwaith pibellau gwaed networks rhwydwaith neume niwm neumes niwm neural niwral neural arch bwa niwral neural arches bwa niwral neural spine pigyn niwral (vertebra) neural spines pigyn niwral (vertebra) neural streak rhes niwral neural streaks rhes niwral neural transmitter trawsyrrydd niwral neural transmitters trawsyrrydd niwral neural tube tiwb niwral neural tubes tiwb niwral neuro-muscular control rheolaeth nerf-gyhyr neuro-muscular controls rheolaeth nerf-gyhyr neurogenic niwrogenig neuroglia niwroglia neuroglial niwrogliaidd neuroglias niwroglia neurological niwrolegol neurological observation arsylw niwrolegol neurological observations arsylw niwrolegol neurologist niwrolegydd neurologists niwrolegydd neurology niwroleg neuromuscular niwrogyhyrol neuron theory damcaniaeth niwronau neurosecretory niwrosecretol neurosis niwrosis neutral niwtral neutral axis echelin niwtral neutral colour lliw niwtral neutral colours lliw niwtral neutral equilibrium cydbwysedd niwtral neutral equilibriums cydbwysedd niwtral neutral wire gwifren niwtral neutral wires gwifren niwtral neutrality niwtraliaeth neutralization niwtraliad neutralization of acids niwtralu asidau neutralizations niwtraliad neutralize niwtraleiddio neutralized niwtraledig neutrino niwtrino neutron niwtron neutrons niwtron neutrophil niwtroffil neutrophils niwtroffil never been alive erioed wedi bod yn fyw new DIR CYF newydd new blue glas newydd new blues glas newydd new classical economist economegwr clasurol newydd new classical economists economegwr clasurol newydd new moon lleuad newydd new moons lleuad newydd new music cerddoriaeth newydd new musics cerddoriaeth newydd new pattern centre bit ebill canoli patrwm newydd new pattern centre bits ebill canoli patrwm newydd newcomer newydd-ddyfodiad newcomers newydd-ddyfodiad newel post post ystlys newel posts post ystlys newly developed newydd eu datblygu news bulletin bwletin newyddion news bulletins bwletin newyddion news media cyfryngau newyddion news values gwerthoedd newyddion news-sheet newyddlen news-sheets newyddlen newsagent siop bapurau newsagents siop bapurau newsletter cylchlythyr newsletters cylchlythyr newspaper papur newydd newspaper front page tudalen flaen papur newydd newspaper front pages tudalen flaen papur newydd newspapers papur newydd newton newton (N) newtonmeter mesurydd newton newtonmeters mesurydd newton newtons newton (N) next of kin perthynas agosaf next to nesaf at nibbana nibbana (Pali = nirvana Sanskrit) nibbanas nibbana (Pali = nirvana Sanskrit) niche cilfach (in ecology) niche cloer (architecture) niche differentiation gwahaniaethu cilfachau niche marketing marchnata arbenigol niches cilfach (in ecology) niches cloer (architecture) nickel nicel (Ni) nickel bronze efydd nicel nickel bronzes efydd nicel nickel plated plât nicel nickel plateds plât nicel nickel silver arian nicel nickel silvers arian nicel nickels nicel (Ni) nicotinamide adenine dineucleotide nicotinamid adenin deuniwcliotid (NAD) nicotinamide adenine dineucleotide phosphate nicotinamid adenin deuniwcliotid ffosffad (NADP) nicotinamide adenine dineucleotide phosphates nicotinamid adenin deuniwcliotid ffosffad (NADP) nicotinamide adenine dineucleotides nicotinamid adenin deuniwcliotid (NAD) nicotinic acid asid nicotinig nicotinic acids asid nicotinig nictitating membrane pilen amrannol nictitating membranes pilen amrannol night blindness dallineb nos night school ysgol nos night schools ysgol nos night shift shifft nos night shifts shifft nos night soil carthion nos night stairs grisiau nos nightdress gŵn nos nightingale eos nightingales eos nightshirt crys nos nightshirts crys nos nightwear dillad nos nihilism nihiliaeth nihilisms nihiliaeth nihilist nihilydd nihilists nihilydd nilpotent nilpotent nimbostratus nimbostratus nimbus lleugylch (halo) nine o’clock watershed trothwy naw o’r gloch nine o’clock watersheds trothwy naw o’r gloch nineteenth century pedwaredd ganrif ar bymtheg ninhydrin ninhydrin ninhydrins ninhydrin ninth nawfed ninths nawfed niobium niobiwm (Nb) niobiums niobiwm (Nb) nipper niper nippers niper nipping pliers gefelen nipio nipping press gwasg nipio nipple nipl (in engineering) nipples nipl (in engineering) nippy vice feis fach nippy vices feis fach nitrate nitrad nitrates nitrad nitration nitradiad nitrations nitradiad nitric acid asid nitrig nitric acids asid nitrig nitriding nitrido nitrification nitreiddiad nitrifications nitreiddiad nitrify nitreiddio nitrifying bacteria bacteria nitreiddio nitrites nitraid nitro-cellulose nitro-cellwlos nitro-celluloses nitro-cellwlos nitro-compound nitro-gyfansoddyn nitro-compounds nitro-gyfansoddyn nitrogen nitrogen (N) nitrogen cycle cylchred nitrogen nitrogen cycles cylchred nitrogen nitrogen fixation sefydlogiad nitrogen nitrogen fixations sefydlogiad nitrogen nitrogen oxide nitrogen ocsid nitrogen oxides nitrogen ocsid nitrogenous excretory system system ysgarthu sylweddau nitrogenaidd nitrogenous excretory systems system ysgarthu sylweddau nitrogenaidd nitrogenous waste product sylwedd gwastraff nitrogenaidd nitrogenous waste products sylwedd gwastraff nitrogenaidd nitrogens nitrogen (N) nitrous acid asid nitrus nitrous acids asid nitrus nivation eirdreulio no ball pelen wallus no balls pelen wallus no drop dim llithriad no drops dim llithriad no liability without fault dim atebolrwydd heb fai no mercy dim trugaredd no printer driver dim adnoddau argraffu no room dim lle no-man's land tir neb no-man's lands tir neb no-touch technique techneg ddigyffwrdd no-touch techniques techneg ddigyffwrdd nobelium nobeliwm (No) nobeliums nobeliwm (No) nobility pendefigaeth noble pendefig noble atmosphere awyrgylch urddasol noble atmospheres awyrgylch urddasol noble gas nwy nobl noble metal metel nobl noble metals metel nobl nobleman pendefig (=aristocrat) nobleman uchelwr (=gentry) noblemans pendefig (=aristocrat) noblemans uchelwr (=gentry) nobles pendefig nociceptor nociganfyddwr nociceptors nociganfyddwr nock hic nocking hicio nocking point man hicio nocking points man hicio nocks hic nocturnal nosol nodal nodol nodality nodaledd node cwgn (on plant) node nod (in anatomy, physics and mathematics) nodes cwgn (on plant) nodes nod (in anatomy, physics and mathematics) nodular cnepynnaidd nodule cnepyn nodules cnepyn noise sŵn noise level lefel sŵn noise levels lefel sŵn noises sŵn nomad nomad nomadic nomadig nomadism nomadiaeth nomadisms nomadiaeth nomads nomad nominal enwol nominal interest llog enwol nominal interests llog enwol nominal ledger llyfr enwol nominal ledgers llyfr enwol nominal size maint enwol nominal sizes maint enwol nominal value gwerth enwol nominal values gwerth enwol nominalism enwolaeth nominalisms enwolaeth nominalist enwolaidd nominalist enwolwr nominalists enwolwr nominate enwebu nomination enwebiad nominations enwebiad nominator enwebwr nominators enwebwr nomogram nomogram nomograms nomogram non aqueous annyfrllyd non-Roman anrhufeinig non-accidental injury anaf annamweiniol non-aggression pact cytundeb i beidio ag ymosod non-aggression pacts cytundeb i beidio ag ymosod non-aligned anymochrol non-alignment anymochredd non-alignments anymochredd non-basic ansylfaenol non-biodegradable anfiodiraddadwy non-calculator digyfrifiannell non-calculator method dull digyfrifiannell non-calculator methods dull digyfrifiannell non-cellular anghellog non-chronological writing ysgrifennu anghronolegol non-classical anghlasurol non-cognitive anwybyddol non-contentious digynnen non-contributory pension pensiwn anghyfrannol non-contributory pensions pensiwn anghyfrannol non-corrosive anghyrydol non-crystalline anghrisialog non-cyclic photophosphorylation ffotoffosfforeiddiad anghylchol non-cyclic photophosphorylations ffotoffosfforeiddiad anghylchol non-denominational school ysgol anenwadol non-denominational schools ysgol anenwadol non-destructive annistrywiol non-destructive cursor cyrchwr annistrywiol non-destructive cursors cyrchwr annistrywiol non-diatonic anniatonig non-directional anghyfeiriadol non-directive play therapy therapi chwarae anghyfeiriol non-disjunction anwahaniad non-disjunctions anwahaniad non-ecumene byd anghyfannedd non-ecumenes byd anghyfannedd non-electrolyte anelectrolyt non-electrolytes anelectrolyt non-empty anwag non-essential dianghenraid (of amino acid) non-evolving anesblygol non-excitable anghyffroadwy non-existent nad yw'n bod non-ferrous anfferrus non-ferrous alloy aloi anfferrus non-ferrous metal metel anfferrus non-ferrous metals metel anfferrus non-fiction ffeithiol non-figurative work gwaith anffigurol non-figurative works gwaith anffigurol non-flammable anfflamadwy non-flowering anflodeuol non-flowering plant planhigyn anflodeuol non-flowering plants planhigyn anflodeuol non-fraying gwrthraflog non-government organisation sefydliad anllywodraethol non-government organisations sefydliad anllywodraethol non-homologous anhomologaidd non-homologue anhomolog non-homologues anhomolog non-hydrous anhydrus non-identical heb fod yn unfath (of twins) non-impact printing argraffu di-draw non-impact printings argraffu di-draw non-indictively wound dirwyniad an-anwythaidd non-indictively wounds dirwyniad an-anwythaidd non-inflammable anfflamadwy non-integrated anghyfannol non-intervention anymyrraeth non-interventions anymyrraeth non-inverting anwrthdroadol non-ionic di-ïonig non-iron dismwddio (finish) non-judgemental yn peidio barnu non-juror annhyngwr non-jurors annhyngwr non-kicking foot troed segur non-kicking foots troed segur non-linear aflinol non-linear function ffwythiant aflinol non-linear functions ffwythiant aflinol non-linear programming rhaglennu aflinol non-live vaccines brechlyn anfyw non-living anfyw non-luminous anoleuol non-magnetic anfagnetig non-manufactured goods nwyddau crai non-maskable interrupt ymyriad anghuddiadwy (NMI) non-maskable interrupts ymyriad anghuddiadwy (NMI) non-metal anfetel non-metallic anfetelaidd non-metals anfetel non-negative annegyddol non-numeric anrhifaidd non-ohmic anomig non-paint finish gorffeniad heblaw paent non-paint finishs gorffeniad heblaw paent non-parametric amharametrig non-phosphoric anffosfforig non-polar amholar non-polar solvent hydoddydd amholar non-polar solvents hydoddydd amholar non-porous difandwll non-porous woods coed difandwll non-positive drive gyriad amhositif non-positive drives gyriad amhositif non-procedural anhrefniadol non-proliferation treaty cytundeb atal-lledaenu non-protein dibrotein non-quantifiable anfesuradwy non-reactive anadweithiol non-reciprocal anghilyddol non-relativistic amherthnaseddol non-renewable anadnewyddadwy non-renewable resource adnodd anadnewyddadwy non-renewable resources adnodd anadnewyddadwy non-representational anghynrychiadol non-resistance anwrthwynebiad non-resistances anwrthwynebiad non-scratch gwrthgrafiad non-selective school ysgol annetholiadol non-selective schools ysgol annetholiadol non-separation anwahaniad non-separations anwahaniad non-singular anhynod non-singular matrix matrics anhynod non-singular matrixes matrics anhynod non-slip gwrth-lithr non-slip rule riwl wrthslip non-slip rules riwl wrthslip non-smudge di-staen non-smudge crayon creon di-staen non-smudge crayons creon di-staen non-specialist anarbenigol non-splitting hardwood pren caled nad yw'n hollti non-splitting hardwoods pren caled nad yw'n hollti non-statutory guidance canllawiau anstatudol non-stick gwrthlud non-stretch diymestyn (finish) non-striker anergydiwr non-strikers anergydiwr non-systematic ansystematig non-teaching staff staff nad ydynt yn addysgu non-terminating annherfynus non-terminating loop dolen annherfynus non-terminating loops dolen annherfynus non-toxic diwenwyn non-toxic dye llifyn diogel non-toxic dyes llifyn diogel non-uniform anunffurf non-verbal communication cyfathrebu dieiriau non-viscous anludiog non-vitreous anwydrog non-volatile anehedol non-volcanic anfolcanig non-zero ansero non-zero acceleration cyflymiad ansero non-zero accelerations cyflymiad ansero nonagon nonagon nonagons nonagon nonconformist anghydffurfiwr nonconformists anghydffurfiwr nonconformity ymneilltuaeth (in dissenting religion) nondecreasing anleihaol nondiegetic sound sain anghynefin nondiegetic sounds sain anghynefin nonequilibrium anghydbwysedd nonequilibriums anghydbwysedd nones nonau nonet noned nonets noned nontrivial annistadl nonuplet nawpled nonuplets nawpled noon canol dydd noons canol dydd noradrenaline noradrenalin noradrenalines noradrenalin norm norm norm-referenced norm-gyfeiriol norm-referenced assessment asesiad norm-gyfeiriol norm-referenced assessments asesiad norm-gyfeiriol normal normal normal construction adeiladwaith normal normal constructions adeiladwaith normal normal distribution gwasgariad normal normal distributions gwasgariad normal normal goods nwyddau cyffredin normal pitch pitsh normal normal pitches pitsh normal normal profit elw cyffredin normal profits elw cyffredin normal screwdriver tyrnsgriw cyffredin normal screwdrivers tyrnsgriw cyffredin normal tidal limit terfyn arferol y llanw normal tidal limits terfyn arferol y llanw normalization normaleiddiad normalizations normaleiddiad normalize normaleiddio normalizer normalydd normalizers normalydd normals normal normative development datblygiad normadol normative developments datblygiad normadol normative ethics moeseg normadol normed normedig norms norm north gogledd north celestial pole pegwn wybrennol y gogledd north celestial poles pegwn wybrennol y gogledd north magnetic pole pôl magnetig y gogledd north magnetic poles pôl magnetig y gogledd north pole pegwn y gogledd (geographic) north pole pôl gogledd (of a magnet) north poles pegwn y gogledd (geographic) north poles pôl gogledd (of a magnet) north seeking pole pôl sy'n cyrchu tua'r gogledd (of a magnet) north seeking poles pôl sy'n cyrchu tua'r gogledd (of a magnet) northing gogleddiad northings gogleddiad norths gogledd nose trwyn nose angle ongl drwyn nose angles ongl drwyn noses trwyn nosing ymyl step nosings ymyl step nostril ffroen nostrils ffroen not in phase yn anghydweddu not necessarily rights of way nid hawliau tramwy o angenrheidrwydd not out ddim allan not to scale heb fod wrth raddfa not up i lawr (of lob) nota cambiata nota cambiata nota cambiatas nota cambiata notary notari notate nodiannu notates nodiannu notation nodiant notations nodiant notch bwlch (in blade) notch rhic (in general) notch rhicio notch and strip bwlch a strip notched bylchog notched joint uniad bylchog notched joints uniad bylchog notched saw set gosodydd llif bylchog notched saw sets gosodydd llif bylchog notches bwlch (in blade) notches rhic (in general) note nodi (=record) note nodyn (=brief record) note nodyn (in music) note sylwi (=take note) note pad pad ysgrifennu note pads pad ysgrifennu notebook nodiadur notebooks nodiadur notes nodyn (=brief record) notes nodyn (in music) notice hysbysiad (=announcement) notice rhybudd (=warning) notice to quit rhybudd i adael notice-board hysbysfwrdd notice-boards hysbysfwrdd notices hysbysiad (=announcement) notices rhybudd (=warning) notifiable disease clefyd hysbysadwy notifiable diseases clefyd hysbysadwy notification hysbysiad notifications hysbysiad notions gofynion ychwanegol (in sewing) notochord notochord notochords notochord nought dim (=nothing) nought gwagnod (symbol) noughts dim (=nothing) noughts gwagnod (symbol) nourishing maethol nourishment maeth nourishments maeth nova nofa novas nofa novice nofis novices nofis noviciate tymor prawf noviciates tymor prawf noxious trades masnach atgas nozzle ffroenell nozzles ffroenell nth nfed nucellus niwcellws nuclear niwclear nuclear energy egni niwclear nuclear family teulu cnewyllol nuclear fission ymholltiad niwclear nuclear fissions ymholltiad niwclear nuclear fusion ymasiad niwclear nuclear fusions ymasiad niwclear nuclear magnetic resonance cyseiniant magnetig niwclear nuclear magnetic resonance spectrum sbectrwm niwclear cyseiniant magnetig nuclear magnetic resonance spectrums sbectrwm niwclear cyseiniant magnetig nuclear magnetic resonances cyseiniant magnetig niwclear nuclear mass màs niwclear nuclear membrane pilen gnewyllol nuclear membranes pilen gnewyllol nuclear missile taflegryn niwclear nuclear missiles taflegryn niwclear nuclear power pŵer niwclear nuclear power station atomfa nuclear power stations atomfa nuclear powers pŵer niwclear nuclear species math niwclear nucleated cnewyllol (in biology) nucleated niwcledig (of atom) nucleated pattern patrwm cnewyllol nucleated patterns patrwm cnewyllol nucleated settlement anheddiad cnewyllol nucleated settlements anheddiad cnewyllol nucleic acid asid niwclëig nucleic acids asid niwclëig nucleohistone niwcliohiston nucleohistones niwcliohiston nucleolar organiser meinwe patrymu’r cnewyllan nucleolar organisers meinwe patrymu’r cnewyllan nucleolar organising region ardal meinwe patrymu’r cnewyllan nucleolar organising regions ardal meinwe patrymu’r cnewyllan nucleolus cnewyllan nucleon niwcleon nucleons niwcleon nucleophile niwclioffil nucleophile niwclioffilig nucleophiles niwclioffil nucleophilic substitution amnewid niwclioffilig nucleoprotein niwclioprotein nucleoproteins niwclioprotein nucleoside niwcliosid nucleosides niwcliosid nucleotide niwcliotid nucleotides niwcliotid nucleus cnewyllyn (in biology) nucleus niwclews (of an atom) nuclide niwclid nuclides niwclid nude noethlun (=painting, sculpture etc of nude figure) nudes noethlun (=painting, sculpture etc of nude figure) nudging pwnio nuisance niwsans nuisances niwsans null nwl null & void di-rym null character nylnod null characters nylnod null hypothesis rhagdybiaeth nwl null point nwlbwynt null pointer nylbwyntydd null pointers nylbwyntydd null points nwlbwynt null set set wag null sets set wag nullify dirymu nulls nwl numb dideimlad number nifer (=total count or aggregate) number rhif (=arithmetical value word, symbol or figure representing this) number rhifo number base bôn rhif number bases bôn rhif number coordinates cyfesurynnau rhifau number generator generadur rhifau number generators generadur rhifau number line llinell rif number lines llinell rif number on roll nifer ar y gofrestr number operations gweithrediadau rhif number scale graddfa rif number scales graddfa rif number sequence dilyniant rhif number sequences dilyniant rhif number system system rifau number systems system rifau number wheels olwynion rhif number work gwaith rhif number works gwaith rhif numbers nifer (=total count or aggregate) numbers rhif (=arithmetical value word, symbol or figure representing this) numeracy rhifedd numeral rhifolyn numerals rhifolyn numerate rhifoli numeration cyfrifiad numerations cyfrifiad numerator rhifiadur numerators rhifiadur numeric rhifol numeric control rheolaeth rifol numeric controls rheolaeth rifol numeric keypad bysellbad rhifol numeric keypads bysellbad rhifol numerical rhifiadol numerical data data rhifiadol numerical integration integru rhifiadol numerical modelling modelu rhifiadol numerical problem problem rifiadol numerical problems problem rifiadol numinous nwmenaidd numismatics niwmismateg nun lleian nunatak nynatac nunataks nynatac nuncio cennad y Pab nunnery lleiandy nurse nyrs nurse nyrsio nursery meithrinfa nursery assistant gweinyddes feithrin nursery assistants gweinyddes feithrin nursery class dosbarth meithrin nursery education addysg feithrin nursery educations addysg feithrin nursery nurse nyrs feithrin nursery nurses nyrs feithrin nursery rhyme hwiangerdd nursery rhymes hwiangerdd nursery school ysgol feithrin nursery schools ysgol feithrin nursery supervisor goruchwyliwr y feithrinfa nursery supervisors goruchwyliwr y feithrinfa nurses nyrs nursing nyrsio nursing audit archwiliad nyrsio nursing audits archwiliad nyrsio nursing auxiliary nyrs ategol nursing care gofal nyrsio nursing cares gofal nyrsio nursing diagnosis diagnosis nyrsio nursing home cartref nyrsio nursing homes cartref nyrsio nursing model model nyrsio nursing models model nyrsio nursing officer swyddog nyrsio nursing officers swyddog nyrsio nurture group grŵp rhoi magwraeth nurture groups grŵp rhoi magwraeth nurture theorist damcaniaethwr magwraeth nurture theorists damcaniaethwr magwraeth nut nyten nut with nylon insert nyten â mewniad neilon nut with rubber insert nyten â mewniad rwber nut with sawn collar nyten â choler wedi'i llifio nutate troelli nutation troelliad nutations troelliad nutrient maetholyn nutrient cycle cylchred faetholion nutrient cycles cylchred faetholion nutrient cycling cylchu maetholion nutrient jelly jeli meithrin nutrients maetholyn nutriment maeth nutriments maeth nutrition maeth (in general) nutrition maetheg (science of) nutrition maethiad (=mode of using food) nutritional maethol nutritional analysis dadansoddiad maeth nutritional composition cyfansoddiad maethion nutritional compositions cyfansoddiad maethion nutritional content cynnwys maethol nutritional contents cynnwys maethol nutritional needs anghenion maeth nutritional value gwerth maethol nutritional values gwerth maethol nutritions maeth (in general) nutritions maetheg (science of) nutritions maethiad (=mode of using food) nutritious maethlon nutritive maethol nuts and bolts nytiau a bolltau nyctinasty nyctinasedd nylon neilon nylon brush brwsh neilon nylon brushs brwsh neilon nylon cutter torrell neilon nylon cutters torrell neilon nylon fishing line lein bysgota neilon nylon fishing lines lein bysgota neilon nylon hinge colfach neilon nylon hinges colfach neilon nylon screw sgriw neilon nylon screws sgriw neilon nylon string tant neilon nylon strings tant neilon nylon stud styden neilon nylon studs styden neilon nylon thread edau neilon nylon threads edau neilon nylon track trac neilon nylon tracks trac neilon nylons neilon nymph nymff nymphs nymff oak bark rhisgl derwen oak barks rhisgl derwen oak gall afal derw oak galls afal derw oakum ocwm oakums ocwm oar rhwyf oasis gwerddon oatcakes bara ceirch oath llw oath of allegiance llw teyrngarwch oath of celibacy llw ymgadw'n ddibriod oaths llw oats ceirch obedience ufudd-dod obediences ufudd-dod obelisk obelisg obelisks obelisg obese gordew obese people pobl ordew obese peoples pobl ordew obesity gordewdra obey ufuddhau object gwrthrych object language nodiaith object languages nodiaith object program nod-raglen object programs nod-raglen objective amcan (=something sought or aimed at) objective gwrthrychiadur (microscope) objective gwrthrychol (=uncoloured by feelings and opinions) objective art celfyddyd wrthrychol objective arts celfyddyd wrthrychol objective function ffwythiant diben objective functions ffwythiant diben objective judgement barn wrthrychol objective judgements barn wrthrychol objective lens lens y gwrthrychiadur objective naturalism naturiolaeth wrthrychol objective naturalisms naturiolaeth wrthrychol objective question cwestiwn gwrthrychol objective questions cwestiwn gwrthrychol objectives amcan (=something sought or aimed at) objectives gwrthrychiadur (microscope) objectivity gwrthrychedd objects gwrthrych oblate byrgrwn (of spheroid, with masculine nouns) oblate oblad (=person in religious order) oblates oblad (=person in religious order) oblation offrwm oblations offrwm obligation rhwymedigaeth obligations rhwymedigaeth oblique arosgo oblique angle ongl arosgo oblique angles ongl arosgo oblique aspect agwedd arosgo oblique aspects agwedd arosgo oblique axis echelin arosgo oblique branch pipe peipen gangen arosgo oblique branch pipes peipen gangen arosgo oblique cylinder silindr arosgo oblique cylinders silindr arosgo oblique line llinell arosgo oblique lines llinell arosgo oblique nailing hoelio arosgo oblique photograph ffotograff arosgo oblique photographs ffotograff arosgo oblique plane plân arosgo oblique planes plân arosgo oblique prism prism arosgo oblique prisms prism arosgo oblique projection tafluniad arosgo oblique projections tafluniad arosgo oblique reverse pen pen arosgo croes oblique reverse pens pen arosgo croes oblique section trychiad arosgo oblique sections trychiad arosgo oblique stroke strôc arosgo oblique strokes strôc arosgo oblique surface arwyneb arosgo oblique surfaces arwyneb arosgo oblique view golwg arosgo oblique views golwg arosgo obliqueness arosgedd obliquity arosgedd (of rays) oblong petryal oblong base sylfaen betryal oblong bases sylfaen betryal oblong palette palet petryal oblong palettes palet petryal oblongs petryal oboe obo oboes obo oboist oböydd oboists oböydd obscurantism gwrtholeuaeth obscurantisms gwrtholeuaeth obscurantist gwrtholeuwr obscurantists gwrtholeuwr obscuration amguddiad (in physics) obscurations amguddiad (in physics) obscure tywyll (of meaning) obsequent gwrthlif obsequent stream ffrwd wrthlif obsequent streams ffrwd wrthlif obsequents gwrthlif observable arsylladwy observation arsylw (technical usage) observation sylw (=comment) observation skill sgìl arsylwi observation skills sgìl arsylwi observation technique techneg arsylwi observation techniques techneg arsylwi observational research ymchwil arsylwadol observational researches ymchwil arsylwadol observational skill sgìl arsylwi observational skills sgìl arsylwi observations arsylw (technical usage) observations sylw (=comment) observatory arsyllfa observe arsyllu (by telescope / microscope) observe arsylwi (technical usage) observe sylwi (non-technical usage) observe phenomena arsylwi ffenomenau observed dan sylw observed forms ffurfiau dan sylw observed objects gwrthrychau dan sylw observer arsylwr (technical usage) observer gwyliwr (non-technical usage) observers arsylwr (technical usage) observers gwyliwr (non-technical usage) obsession obsesiwn obsessions obsesiwn obsidian gwydrfaen obsidians gwydrfaen obsolete anarferedig obstacle rhwystr obstacle race ras rwystrau obstacle races ras rwystrau obstacles rhwystr obstetrician obstetregydd obstetricians obstetregydd obstetrics obstetreg obstructing the field rhwystro'r maeswyr obstruction rhwystr obstructions rhwystr obtain darganfod (in physics etc) obtain evidence dod o hyd i dystiolaeth obtain measurements dod o hyd i fesuriadau obtuse aflem (with feminine nouns) obtuse aflym (with masculine nouns) obtuse angle ongl aflem obtuse angled triangle triongl ongl aflem obtuse angled triangles triongl ongl aflem obtuse angles ongl aflem ocarina ocarina ocarinas ocarina occasional conformity cydymffurfio achlysurol occasional holidays gwyliau achlysurol occasional music cerddoriaeth achlysurol occasional musics cerddoriaeth achlysurol occasional stream ffrwd ysbeidiol occasional streams ffrwd ysbeidiol occasional table bwrdd achlysurol occasional tables bwrdd achlysurol occluded achludol occluded front ffrynt achludol occluded fronts ffrynt achludol occlusion achludiad occlusions achludiad occulation arguddiad occulations arguddiad occult cudd occupation galwedigaeth (=job) occupation meddiannaeth (military) occupation meddiannaeth (of property) occupation number rhif meddiannaeth occupation numbers rhif meddiannaeth occupational galwedigaethol occupational field maes galwedigaethol occupational fields maes galwedigaethol occupational health iechyd galwedigaethol occupational healths iechyd galwedigaethol occupational programme rhaglen alwedigaethol occupational programmes rhaglen alwedigaethol occupational therapist therapydd galwedigaethol occupational therapists therapydd galwedigaethol occupational therapy therapi galwedigaethol occupations galwedigaeth (=job) occupations meddiannaeth (military) occupations meddiannaeth (of property) occupied territory tiriogaeth feddianedig occupier preswyliwr occupiers preswyliwr occupy anheddu (in ecology) occupy meddiannu (of military force) occupying forces lluoedd y meddiannu ocean cefnfor oceanic cefnforol oceanography eigioneg oceans cefnfor ocellus ocelws ochre ocr ochres ocr octagon octagon octagonal wythonglog octagonal bar bar wythonglog octagonal bars bar wythonglog octagonal table bwrdd wythonglog octagonal tables bwrdd wythonglog octagons octagon octahedron octahedron octahedrons octahedron octal wythol octal buffer byffer wythol octal buffers byffer wythol octal notation nodiant wythol octal notations nodiant wythol octal system system wythol octal systems system wythol octant octant octants octant octave wythfed octave step cam wythfed octave steps cam wythfed octaves wythfed octet wythawd octets wythawd octuplet wythpled octuplets wythpled ocular llygadol ocular ocwlar oculars ocwlar odd function od-ffwythiant odd functions od-ffwythiant odd leg callipers caliperau jenni odd number odrif odd numbers odrif odd parity odbaredd odd side ochr od odd side pattern patrwm ochr od odd side patterns patrwm ochr od odd sides ochr od odd-parity check prawf odbaredd odd-parity checks prawf odbaredd oddments pethau dros ben odds and ends tameidiau ode awdl (in strict metre) ode cerdd (in free metre) odontoid process cnepyn deintffurf odour arogl odour-resistant gwrtharogl (finish) odourless diarogl odourous aroglus odours arogl oedema oedema oedemas oedema oesophagus oesoffagws oestrogen oestrogen oestrogens oestrogen oestrous cycle cylchred oestrws oestrous cycles cylchred oestrws oestrus oestrws off i ffwrdd (of switch) off wedi'i ddiffodd (of light, fire, gas) off balance colli cydbwysedd off centre allan o'r canol off drive dreif ochr agored off drives dreif ochr agored off licence siop drwyddedig off licences siop drwyddedig off side ochr agored off sides ochr agored off stump stwmp pellaf off stumps stwmp pellaf off the school site oddi ar safle'r ysgol off-break bowling troelliad ochr agored off-break bowlings troelliad ochr agored off-cut torbren off-cuts torbren off-hand grinder peiriant llifanu yn y llaw off-hand grinders peiriant llifanu yn y llaw off-hand grinding llifanu yn y llaw off-line all-lein off-line editing golygu all-lein off-line processing prosesu all-lein off-peak allfrig off-setting screw sgriw atredu (lathe part) off-setting screws sgriw atredu (lathe part) off-the-job training hyfforddiant i ffwrdd o’r gwaith off-the-job trainings hyfforddiant i ffwrdd o’r gwaith offence trosedd (criminal) offences trosedd (criminal) offences against the person troseddau yn erbyn person offensive ymosodiad (=attack) offensive ymosodol (=attacking) offensives ymosodiad (=attack) offer cynnig offer explanations cynnig esboniadau offering offrwm offerings offrwm offers cynnig offertory offrwm (of church service) offertory offrymgan (in music) office swydd (=post) office swyddfa (of place) office automation awtomeiddio swyddfa office automations awtomeiddio swyddfa office-holding swydd-ddaliad office-holdings swydd-ddaliad officer swyddog officers swyddog offices swydd (=post) offices swyddfa (of place) official swyddog official swyddogol official opening agoriad swyddogol official openings agoriad swyddogol official statistics ystadegau swyddogol officials swyddog offset atred offset gosod yn erbyn (against tax etc) offset ongli offset jaw spanner sbaner â safn atred offset jaw spanners sbaner â safn atred offset peg peg atred offset pegs peg atred offset print printiad offset offset printing argraffu offset offset prints printiad offset offset roller rholer atred offset rollers rholer atred offset screwdriver tyrnsgriw atred offset screwdrivers tyrnsgriw atred offsets atred offshoot cangen offshoots cangen offshore alltraeth (e.g. wind, bar) offside camsefyll offsite work gwaith oddi ar y safle offsite works gwaith oddi ar y safle offspring epil ogee ogee ogee arch bwa ogee ogee arches bwa ogee ogee moulding mowldin ogee ogee mouldings mowldin ogee ogee plane plaen ogee ogee planes plaen ogee ogees ogee ogham ogam ogham characters llythrennau ogam ogham stone maen ogam ogham stones maen ogam oghams ogam ogive ogif ogives ogif ohm ohm ohmeter ohmedr ohmeters ohmedr oil iro oil olew oil based sail olew oil based colour lliw sail olew oil based colours lliw sail olew oil based paint paent sail olew oil based paints paent sail olew oil blacking duo ag olew oil bluing glasu ag olew oil can can olew oil cans can olew oil colour lliw olew oil colours lliw olew oil crayon creon olew oil crayons creon olew oil finish gorffeniad olew oil finishs gorffeniad olew oil groove rhigol olew oil grooves rhigol olew oil hardening olew galedu oil hole twll olew oil holes twll olew oil nipple nipl olew oil nipples nipl olew oil of turpentine olew tyrpant oil painting paentiad olew (of painted picture) oil painting peintio olew (of process or art) oil paintings paentiad olew (of painted picture) oil palm kernels cnewyll palmwydd olew oil paper papur olew oil papers papur olew oil pastel pastel olew oil pastels pastel olew oil reservoir cronfa olew oil reservoirs cronfa olew oil rig llwyfan olew oil rigs llwyfan olew oil seed rape olew had rêp oil seed rapes olew had rêp oil stain staen olew oil stains staen olew oil stencil paper papur olew stensil oil stencil papers papur olew stensil oil well ffynnon olew oil wells ffynnon olew oil-bearing rocks creigiau dal olew oil-immersion objective gwrthrychiadur mewn olew oil-immersion objectives gwrthrychiadur mewn olew oilfield maes olew oilfields maes olew oilproof gwrtholew oilproof paper papur gwrtholew oilproof papers papur gwrtholew oils and fats olewau a brasterau oilseed hadau olew oilstone carreg hogi oilstone slip carreg hogi gau oilstone slips carreg hogi gau oilstones carreg hogi oily olewog ointment eli ointments eli old age henaint old age pension pensiwn henoed old age pensions pensiwn henoed old ages henaint old and infirm hen a methedig old people's home cartref henoed old people's homes cartref henoed old regime hen oruchwyliaeth old regimes hen oruchwyliaeth older client cleient hŷn older clients cleient hŷn oleaginous olewog oleic acid asid olëig oleic acids asid olëig oleum olëwm oleums olëwm olfactory arogleuol olfactory lobe llabed arogli olfactory lobes llabed arogli oligarchy oligarchiaeth oligopolistic market marchnad oligopolaidd oligopolistic markets marchnad oligopolaidd oligopoly oligopoli oligopsony oligopsoni olive olewydden (of tree) olive green gwyrdd olewydd (enamelling colour) olive greens gwyrdd olewydd (enamelling colour) olive oil olew olewydd olive oils olew olewydd olives olewydden (of tree) omasum omaswm omasums omaswm ombudsman ombwdsmon ombudsmans ombwdsmon ommatidium omatidiwm ommatidiums omatidiwm omnipotent hollalluog omnivore hollysydd omnivores hollysydd omnivorous hollysol on ymlaen (of switch) on ynghynn (of light, fire, gas) on average ar gyfartaledd on drive dreif ochr goes on drives dreif ochr goes on heat cwnna (of bitch) on heat gwasod (of cow etc) on probation ar brawf on side ochr goes on sides ochr goes on the back ar y cefn on the floor ar y llawr on the front ar y tu blaen on the rebound ar adlam on the school site ar safle'r ysgol on the wing ar yr ystlys on toes ar flaenau'r traed on your marks ar eich marciau on-line ar-lein on-line facilities cyfleusterau ar-lein on-line processing prosesu ar-lein on-line system system ar-lein on-line systems system ar-lein on-screen instructions cyfarwyddiadau sgrin on-the-job training hyfforddiant wrth y gwaith on-the-job trainings hyfforddiant wrth y gwaith on-the-spot dance dawns unfan on-the-spot dances dawns unfan oncologist oncolegydd oncologists oncolegydd oncology oncoleg one complete rotation un cylchdro cyflawn one complete rotations un cylchdro cyflawn one decimal place un lle degol one minute gun ergyd munud one minute guns ergyd munud one parent family teulu un rhiant one piece pattern patrwm undarn one piece patterns patrwm undarn one quarter chwarter one quarters chwarter one religion worship addoliad un grefydd one religion worships addoliad un grefydd one's complement cyflenwad unol one's complements cyflenwad unol one-brush stroke strôc brwsh un-strôc one-brush strokes strôc brwsh un-strôc one-eighth wythfed one-eighths wythfed one-fifth pumed one-fifths pumed one-handed pass pàs unllaw one-many correspondence cyfatebiaeth un-i-lawer one-many correspondences cyfatebiaeth un-i-lawer one-ninth nawfed one-ninths nawfed one-off mae angen un one-one correspondence cyfatebiaeth un-i-un one-one correspondences cyfatebiaeth un-i-un one-pass system system unffordd one-pass systems system unffordd one-piece development datblygiad undarn one-piece developments datblygiad undarn one-seventh seithfed one-sevenths seithfed one-side unochrol one-sixth chweched one-sixths chweched one-stroke brush brwsh un-strôc one-stroke brushs brwsh un-strôc one-tenth degfed one-tenths degfed one-third traean one-thirds traean one-to-one un-i-un one-way classification dosbarthiad unffordd one-way classifications dosbarthiad unffordd one-way list rhestr unffordd one-way lists rhestr unffordd one-way street stryd unffordd one-way streets stryd unffordd onion nionyn onions nionyn onset side of ice ochr atrew onshore atraeth onside iawnochri onto function ffwythiant ar onto functions ffwythiant ar onyx onics onyxes onics oocyst oocyst oocysts oocyst oocyt oocyt oocyts oocyt oogamete oogamet oogametes oogamet oogamous oogamus oogamy oogamedd oogenesis oogenesis oogonium oogoniwm oogoniums oogoniwm oolitic oolitig oology ooleg oophore ooffor oophores ooffor oophyte ooffyt oophytes ooffyt ooplast ooplast ooplasts ooplast oosperm oosberm oosperms oosberm oosphere oosffer oospheres oosffer oosporangium oosborangiwm oosporangiums oosborangiwm oospore oosbor oospores oosbor ootype ootyp ootypes ootyp oozes morlaid (deep sea) opacifier didreiddydd opacifiers didreiddydd opacity didreiddedd opalescent symudliw opalescent enamel enamel symudliw opalescent enamels enamel symudliw opaque di-draidd opaque colour lliw di-draidd opaque colours lliw di-draidd opaque enamel enamel di-draidd opaque enamels enamel di-draidd opaque glaze gwydredd di-draidd opaque glazes gwydredd di-draidd opaque paste past di-draidd opaque pastes past di-draidd open agor open agored open access mynediad agored open adoption mabwysiadu agored open air awyr agored open airs awyr agored open both ways agor y naill ffordd a'r llall open chain stitch pwyth cadwyn agored open chain stitches pwyth cadwyn agored open cheque siec agored open cheques siec agored open circulation cylchrediad agored open circulations cylchrediad agored open clusters clystyrau agored open day diwrnod agored open diapason diapason agored open diapasons diapason agored open eaves bondo agored open examination arholiad agored open examinations arholiad agored open factor ffactor agored open factors ffactor agored open field system cyfundrefn maes agored open field systems cyfundrefn maes agored open flat tongs gefel fflat agored open glove maneg agored open gloves maneg agored open grain graen agored open grains graen agored open hearth tân agored open hearths tân agored open interval cyfwng agored open intervals cyfwng agored open inwards and outwards agor tuag i mewn ac allan open learning dysgu agored open market operations gweithrediadau marchnad agored open merge-data-file agor ffeil ddata gyfun open note nodyn agored open notes nodyn agored open pack pecyn agored open packs pecyn agored open pipe pib agored (in music) open pipes pib agored (in music) open plan school ysgol cynllun agored open plan schools ysgol cynllun agored open punctuation atalnodi agored open question cwestiwn agored open questions cwestiwn agored open score sgôr agored open scores sgôr agored open seam sêm agored open seams sêm agored open side wing forward blaenasgell agored open side wing forwards blaenasgell agored open staircase grisiau agored open stance safiad agored open stances safiad agored open string tant agored open strings tant agored open system cyfundrefn agored open systems cyfundrefn agored open texture gwead agored open textures gwead agored open the bowling agor y bowlio open the tap agor y tap open traverse tramwy agored open traverses tramwy agored open-door policy polisi drws agored open-end spanner sbaner ceg agored open-end spanners sbaner ceg agored open-ended question cwestiwn penagored open-ended questions cwestiwn penagored open-flame kiln odyn fflam agored open-flame kilns odyn fflam agored open-hearth furnace ffwrnais dân agored open-hearth furnaces ffwrnais dân agored open-mouth tongs gefel gegagored opencast coal mining cloddio glo brig opencast coat glo brig opencast coats glo brig openfield maes agored openfield system trefn meysydd agored openfield systems trefn meysydd agored openfields maes agored opening agoriad opening agoriadol opening balance balans agoriadol opening balances balans agoriadol opening stock stoc agoriadol opening stocks stoc agoriadol openings agoriad opera opera opera house tŷ opera opera houses tŷ opera opera seria opera seria opera serias opera seria opera-oratorio opera-oratorio operand operand operands operand operas opera operate gweithredu operating characteristic function ffwythiant nodwedd weithredol operating characteristic functions ffwythiant nodwedd weithredol operating system system weithredu operating system software meddalwedd system weithredu operating system softwares meddalwedd system weithredu operating systems system weithredu operation gweithrediad operation llawdriniaeth (surgical) operation ymgyrch (military) operation code cod gweithredu (op code) operation codes cod gweithredu (op code) operation mode modd gweithredu operation modes modd gweithredu operation of number gweithrediad rhif operation table tabl gweithrediad operation tables tabl gweithrediad operational gweithredol (in general) operational hywaith (in economics) operational area maes gweithredu operational areas maes gweithredu operational efficiency effeithlonrwydd gweithredol operations gweithrediad operations llawdriniaeth (surgical) operations ymgyrch (military) operations manager rheolwr gweithrediadau operations managers rheolwr gweithrediadau operations of combination plane gweithrediadau'r plaen amlddefnydd operative gweithiol (in economics) operator gweithredwr (of person) operator gweithredydd (of symbol or function) operators gweithredwr (of person) operators gweithredydd (of symbol or function) operculum opercwlwm operculums opercwlwm operetta opereta operettas opereta operon operon operons operon ophthalmologist offthalmolegydd ophthalmologists offthalmolegydd ophthalmology offthalmoleg opinion barn opinion poll arolwg barn opinion polls arolwg barn opinions barn opponent gwrthwynebwr opponents gwrthwynebwr opportunism oportiwnistiaeth opportunisms oportiwnistiaeth opportunist oportiwnydd opportunists oportiwnydd opportunity cyfle opportunity cost cost cyfle opportunity costs cost cyfle opposing gwrthwynebol opposite cyferbyn (=facing) opposite dirgroes (=diametrically different) opposite gwrthwyneb (=contrary) opposite angle ongl gyferbyn opposite angles ongl gyferbyn opposite angles onglau cyferbyn opposite bud blaguryn cyferbyn opposite buds blaguryn cyferbyn opposite direction cyfeiriad dirgroes opposite directions cyfeiriad dirgroes opposite sides ochrau cyferbyn opposite signs arwyddion dirgroes opposites gwrthwyneb (=contrary) opposition gwrthblaid (party) opposition gwrthwynebiad oppositions gwrthblaid (party) oppositions gwrthwynebiad oppress gormesu oppression gormes oppressions gormes oppressive gormesol oppressor gormeswr oppressors gormeswr opt out eithrio opted out school ysgol sydd wedi eithrio opted out schools ysgol sydd wedi eithrio optic chiasma ciasma optig optic chiasmas ciasma optig optic lobe llabed optig optic lobes llabed optig optic nerve nerf optig optic nerves nerf optig optical optegol optical activity actifedd optegol optical angle ongl weledol optical angles ongl weledol optical art celfyddyd optegol optical arts celfyddyd optegol optical brightener disgleirydd optegol optical brighteners disgleirydd optegol optical character recognition adnabod nodau gweledol (OCR) optical compound microscope microsgop cyfansawdd optegol optical compound microscopes microsgop cyfansawdd optegol optical disc disg optegol optical discs disg optegol optical fibre ffibr optegol optical fibres ffibr optegol optical illusion rhith optegol optical illusions rhith optegol optical isomer isomer optegol optical isomers isomer optegol optical pyrometer pyromedr optegol optical pyrometers pyromedr optegol optical square sgwâr optegol optical squares sgwâr optegol optical system system optegol optical systems system optegol optical white gwyn optegol optician optegydd opticians optegydd optics opteg optimal optimaidd optimal performance perfformiad optimaidd optimal performances perfformiad optimaidd optimism optimistiaeth optimisms optimistiaeth optimization optimeiddiaeth optimizations optimeiddiaeth optimize optimeiddio optimizer optimeiddiwr optimizers optimeiddiwr optimizing compiler crynhoydd optimeiddio optimizing compilers crynhoydd optimeiddio optimum optimwm optimum population poblogaeth optimwm optimum populations poblogaeth optimwm optimums optimwm option dewis option mortgage morgais dewisol option mortgages morgais dewisol optional dewisol options dewis opus opws opéra buffe opéra buffe opéra buffes opéra buffe opéra-ballet opéra-ballet opéra-ballets opéra-ballet opéra-comique opéra-comique opéra-comiques opéra-comique oracle oracl oracles oracl oracy llefaredd oral arithmetic rhifyddeg lafar oral arithmetics rhifyddeg lafar oral assessment asesu llafar oral description disgrifiad llafar oral descriptions disgrifiad llafar oral hygiene hylendid genau oral hygienes hylendid genau oral infection haint trwy'r genau oral infections haint trwy'r genau oral report adroddiad llafar oral reports adroddiad llafar oral surgeon llawfeddyg y geg oral surgeons llawfeddyg y geg oral surgery llawfeddygaeth y geg oral test prawf llafar oral tests prawf llafar oral toilet glanhau'r geg oral tradition traddodiad llafar oral traditions traddodiad llafar oral vaccine brechlyn trwy'r genau oral vaccines brechlyn trwy'r genau oral vocabulary geirfa lafar orange red coch oren (vermilion) orange reds coch oren (vermilion) orange shellac sielac oren orange shellacs sielac oren oratorio oratorio orbit crau'r llygad (of the eye) orbit orbit (of planets, satellites) orbit troi o gwmpas (of planets, satellite) orbital creuol (of eye socket) orbital orbital (of electrons) orbital orbitol (of electron) orbital sander sandiwr orbitol orbital sanders sandiwr orbitol orbital sinus sinws creuol orbitals orbital (of electrons) orbits crau'r llygad (of the eye) orbits orbit (of planets, satellites) orchard perllan orchards perllan orchestra cerddorfa orchestral cerddorfaol orchestral music cerddoriaeth gerddorfaol orchestral musics cerddoriaeth gerddorfaol orchestras cerddorfa orchestrate sgorio orchestration trefniant cerddorfaol orchestrations trefniant cerddorfaol orchestrator sgoriwr orchestrators sgoriwr ordain ordeinio ordeal diheurbrawf (=ancient test of guilt) ordeal by fire diheurbrawf tân ordeal by water diheurbrawf dŵr ordeals diheurbrawf (=ancient test of guilt) order archeb (=something asked for) order gorchymyn (=command) order gradd order trefn (=sequence) order trefnu (=place in sequence) order urdd (=body) order of magnitude trefn maint order of work trefn gwaith order statistics ystadegau trefn ordered trefnedig ordered list rhestr drefnedig ordered lists rhestr drefnedig ordered pairs parau trefnedig orders archeb (=something asked for) orders gorchymyn (=command) orders gradd orders trefn (=sequence) orders urdd (=body) orders of rotational symmetry trefnau cymesuredd cylchdro ordinal trefnol ordinal number rhif trefnol ordinal numbers rhif trefnol ordinance ordinhad ordinances ordinhad ordinary esgob (=bishop) ordinary ordinari (=part of service) ordinary truss cwpl cyffredin ordinate mesuryn ordinates mesuryn ordination ordeinio ordnance ordnans ordnance datum seilnod ordnans ordnance datums seilnod ordnans ordnances ordnans ore mwyn ore carrier mwynlong ore carriers mwynlong organ organ (=musical instrument) organ organ (of the body) organ bellows megin organ organ console consol organ organ consoles consol organ organ loft llofft organ organ lofts llofft organ organ mass offeren organ organ of Corti organ Corti organ of administration corff gweinyddol organ of government corff llywodraeth organ sound board seinfwrdd organ organ sound boards seinfwrdd organ organ transplantation trawsblaniad organ (an instance of) organ transplantation trawsblannu organau (in general) organ transplantations trawsblaniad organ (an instance of) organ wind chest cist wynt organ organ wind chests cist wynt organ organdie organdi organdies organdi organelle organyn organelles organyn organic organig organic compound cyfansoddyn organig organic compounds cyfansoddyn organig organic matter defnydd organig organic matters defnydd organig organism organeb organisms organeb organist organydd organists organydd organization corff (=company) organization cyfundrefn (=system) organization mudiad (=society) organization trefniadaeth (=systematic arrangement) organization chart siart rheoli organization chart siart trefniadaeth organization charts siart rheoli organization charts siart trefniadaeth organization structure strwythur trefniadaeth organization structures strwythur trefniadaeth organizational trefniadaethol organizational chart siart trefniadaeth organizational charts siart trefniadaeth organizational skills sgiliau trefnu organizations corff (=company) organizations cyfundrefn (=system) organizations mudiad (=society) organizations trefniadaeth (=systematic arrangement) organize trefnu organize sounds trefnu seiniau organizer meinwe patrymu (of living tissue) organizer trefnydd (of person) organizers meinwe patrymu (of living tissue) organizers trefnydd (of person) organohalogen compounds cyfansoddion organohalogen organs organ (=musical instrument) organs organ (of the body) organum organwm organums organwm organza organsa organzas organsa orientated cyfeiriedig orientation cyfeiriadaeth orientations cyfeiriadaeth orienteering cyfeiriannu orifice agorfa orifices agorfa origin lleolbwynt origin tarddbwynt (of graph) origin tarddiad origin myth myth tarddiad origin myths myth tarddiad origin of stars tarddiad sêr origin of the universe dechreuad y bydysawd original gwreiddiol (in general) original sylfaenol (in serialism) original cost cost wreiddiol original costs cost wreiddiol original data data gwreiddiol original design cynllun gwreiddiol (of plan) original design dyluniad gwreiddiol (of sketch etc) original designs cynllun gwreiddiol (of plan) original designs dyluniad gwreiddiol (of sketch etc) original equipment manufacturer cynhyrchydd offer gwreiddiol (OEM) original equipment manufacturers cynhyrchydd offer gwreiddiol (OEM) original place lle gwreiddiol original places lle gwreiddiol original shape ffurf wreiddiol original shapes ffurf wreiddiol originate tarddu origins lleolbwynt origins tarddbwynt (of graph) origins tarddiad ornament addurn ornamental addurnol ornamental hinge colfach addurniadol ornamental hinges colfach addurniadol ornamentation addurniad ornamentations addurniad ornaments addurn ornate addurnol orogenesis orogenesis orogenetic orogenetig orogeny orogeni orographic orograffig orographical orograffigol orthinine orthinin orthinines orthinin orthocentre orthograidd orthocentres orthograidd orthodontics orthodonteg orthodontist orthodeintydd orthodontists orthodeintydd orthodox uniongred orthodoxy uniongrededd orthogonal orthogonol orthogonal matrix matrics orthogonol orthogonal matrixes matrics orthogonol orthogonal orifice agorfa orthogonol orthogonal orifices agorfa orthogonol orthogonality orthogonoledd orthographic orthograffig orthographic drawing lluniad orthograffig orthographic drawings lluniad orthograffig orthographic projection tafluniad orthograffig orthographic projections tafluniad orthograffig orthographic view golwg orthograffig orthographic views golwg orthograffig orthomorphic projection tafluniad orthomorffig orthomorphic projections tafluniad orthomorffig orthonormal orthonormal orthopaedic orthopaedig orthopaedics orthopaedeg orthophosphate orthoffosffad orthophosphates orthoffosffad orthoptic orthoptig orthoptist orthoptydd orthoptists orthoptydd oscillate osgiliadu oscillating motion mudiant osgiliadol oscillating motions mudiant osgiliadol oscillation osgiliad oscillations osgiliad oscillator osgiliadur oscillators osgiliadur oscillatory osgiliadol oscillatory movement symudiad osgiliadol oscillatory movements symudiad osgiliadol oscilloscope osgilosgop oscilloscopes osgilosgop osculate minialu osculating minialaidd osculation minialedd osculations minialedd osmium osmiwm (Os) osmiums osmiwm (Os) osmoconformer osmogydymffurfiwr osmoconformers osmogydymffurfiwr osmoreceptor osmodderbynnydd osmoreceptors osmodderbynnydd osmoregulation osmoreolaeth osmoregulations osmoreolaeth osmoregulatory osmoreolaethol osmosis osmosis osmotic pressure gwasgedd osmotig osmotic pressures gwasgedd osmotig osmotic solute potential potensial toddyn osmotig osmotic solute potentials potensial toddyn osmotig osmotically active osmotig weithredol osprey gwalch y pysgod ossicle esgyrnyn ossicle osigl ossicles esgyrnyn ossicles osigl ossification asgwrneiddiad ossifications asgwrneiddiad ossify asgwrneiddio osteoporosis osteoporosis ostinato ostinato ostiole ostiol ostioles ostiol ostium ostiwm ostiums ostiwm otherwise fel arall otolith otolith otoliths otolith otter dyfrgi otters dyfrgi out allan out of bounds tu hwnt i'r ffin out of court allan o'r cwrt out of date wedi dyddio out of phase anghydwedd out of range tu allan i'r amrediad (of statistics) out-of-school activities gweithgareddau y tu allan i'r ysgol out-of-town retail site safle adwerthu y tu allan i'r dref out-of-town retail sites safle adwerthu y tu allan i'r dref out-patient claf allanol out-patients claf allanol out-take alldoriad out-takes alldoriad outblowing wind gwynt allchwyth outblowing winds gwynt allchwyth outbound allan (of flights, traffic etc) outbreak cychwyn (of war) outbreaks cychwyn (of war) outbreed allfridio outburst echwythiad outbursts echwythiad outcast alltud outcasts alltud outcome canlyniad outcomes canlyniad outcrop brig outcropping brigo outcrops brig outdated ar ôl yr oes outdoor activity gweithgaredd awyr agored outdoor and adventurous activities gweithgareddau awyr agored ac antur outdoor environment amgylchedd awyr agored outdoor environments amgylchedd awyr agored outdoor play chwarae awyr agored outdoor sketching braslunio awyr agored outdoor sweeping brush brwsh cans outdoor sweeping brushs brwsh cans outdoor use defnydd yn yr awyr agored outdoor work gwaith awyr agored outdoor works gwaith awyr agored outdoors awyr agored outer allanol outer city cyrion dinas outer country ring cylch gwledig y cyrion outer country rings cylch gwledig y cyrion outer ear clust allanol outer ears clust allanol outer face wyneb allanol outer faces wyneb allanol outer fringes cyrion allanol outer parts rhannau allanol outermost nesaf allan outfield allfaes outfielder ffildiwr outfielders ffildiwr outfields allfaes outfit gwisg gyflawn outfits gwisg gyflawn outflow all-lif outflowing all-lifo outflows all-lif outflows llif arian allan (of money) outlaw gwahardd (a practice) outlaw herwr outlaw rhoi ar herw (a person) outlawry herwriaeth outlaws herwr outlay gwariant outlet allfa outlets allfa outlier allgraig outliers allgraig outline amlinell (=lines of an object) outline amlinelliad (=summary) outline amlinellol outline amlinellu outline diagram diagram amlinellol outline diagrams diagram amlinellol outline drawing lluniad amlinell outline drawings lluniad amlinell outline map map amlinell outline maps map amlinell outline section trychiad amlinell outline sections trychiad amlinell outline stitch pwyth amlinell outline stitches pwyth amlinell outlines amlinell (=lines of an object) outlines amlinelliad (=summary) outpatients' hospital ysbyty cleifion allanol outpatients' hospitals ysbyty cleifion allanol outport allborth outports allborth outpost allbost outposts allbost output allbwn (of computer etc) output allbynnu output cynnyrch (=product) output buffer byffer allbwn output buffers byffer allbwn output device dyfais allbynnu output devices dyfais allbynnu output stream all-lif output streams all-lif output unit uned allbynnu output units uned allbynnu output voltage foltedd allbwn output voltages foltedd allbwn outputs allbwn (of computer etc) outputs cynnyrch (=product) outrelief cymorth allanol outreliefs cymorth allanol outside tu allan outside callipers caliperau allanol outside diameter diamedr allanol (o/d) outside diameters diamedr allanol (o/d) outside forward asgellwr outside forwards asgellwr outside left asgellwr chwith (of player) outside lefts asgellwr chwith (of player) outside leg coes allanol outside legs coes allanol outside micrometer micromedr allanol outside micrometers micromedr allanol outside right asgellwr de (of player) outside rights asgellwr de (of player) outside wall wal allanol outside walls wal allanol outside-half maswr outside-halfs maswr outsides tu allan outstep tu allan i'r droed outsteps tu allan i'r droed outswinger gwyriad allan outswingers gwyriad allan outward allanol outwash apron ffedog allolchi outwash aprons ffedog allolchi outwash deposits dyddodion allolchi outwash plain sandura outwash plains sandura outwork amddiffynfa allanol (military) outwork gwaith allanol (industry) outworker gweithiwr allanol outworkers gweithiwr allanol outworks amddiffynfa allanol (military) outworks gwaith allanol (industry) oval hirgrwn oval base sylfaen hirgrwn oval bases sylfaen hirgrwn oval head stake bonyn pen cromen oval head stakes bonyn pen cromen oval lost head nail hoelen hirgron bengoll oval lost head nails hoelen hirgron bengoll oval nail hoelen hirgron oval nails hoelen hirgron oval shape ffurf hirgron oval shapes ffurf hirgron oval window ffenestr hirgron oval windows ffenestr hirgron ovarian ofaraidd ovary ofari ovary wall mur yr ofari ovary walls mur yr ofari oven ffwrn oven cleaner defnydd glanhau ffwrn oven cleaners defnydd glanhau ffwrn ovenfire ffwrndanio ovens ffwrn over pelawd (in cricket) over arm bowling bowlio dros ysgwydd over bankful gorgyforlan over bankfuls gorgyforlan over distance training hyfforddi dros bellter over grasp trosafael over grasps trosafael over thrust gorwthiad over thrusts gorwthiad over-firing gordanio over-fishing gorbysgota over-print tros-argraffu overall cyffredinol (=general) overall cyflawn (of rate, reaction) overall o ben i ben (of measurements) overall oferôl (protective clothing) overall decrease lleihad trwodd a thro overall decreases lleihad trwodd a thro overall dimensions mesuriadau o ben i ben overall grade gradd ar gyfartaledd overall grades gradd ar gyfartaledd overall length hyd o ben i ben overall lengths hyd o ben i ben overalls oferôl (protective clothing) overarm pass pàs dros ysgwydd overblanket carthen overblankets carthen overblouse trosflows overblouses trosflows overcast sky awyr gwbl gymylog overcast stitch trawsbwyth overcast stitches trawsbwyth overcharge gorgodi overcome goresgyn overcome difficulties goresgyn anawsterau overcrowded gorlawn overcrowding gorlenwi overdeepen gorddyfnu overdeepened gorddwfn overdose dos gormodol overdoses dos gormodol overdraft gorddrafft overdrafts gorddrafft overdress ffrog diwnig overestimate goramcangyfrif overestimates goramcangyfrif overflow gorlif overflow gorlifo overflow bit did gorlif overflow bits did gorlif overflow channel sianel orlif overflow channels sianel orlif overflows gorlif overfold trosblyg overfolded seam sêm orlap overfolded seams sêm orlap overfolds trosblyg overglaze troswydro overglaze troswydryn overglazes troswydryn overhand knot cwlwm tros law overhand knots cwlwm tros law overhang bargodi overhanging cave ogof ordo overhanging caves ogof ordo overhanging window ffenestr fargod overhanging windows ffenestr fargod overhaul atgyweirio overhead uwchben overhead projector taflunydd dros ysgwydd overhead projectors taflunydd dros ysgwydd overhead valve falf uwchben overhead valves falf uwchben overhead wires gwifrau uwchben overheads gorbenion (in finance) overheat gorboethi overkill gor-ladd overland trostir overlands trostir overlap gorgyffwrdd overlap gorgyffyrddiad overlapped seam sêm drosblyg overlapped seams sêm drosblyg overlapping top top gorymylol overlapping tops top gorymylol overlaps gorgyffyrddiad overlay troshaen overlay troshaenu overlay keyboard bysellfwrdd droshaen overlay keyboards bysellfwrdd droshaen overload gorlwytho overlord mechdeyrn overlords mechdeyrn overlordship uwcharglwyddiaeth overlordships uwcharglwyddiaeth overlying rock craig orchudd overlying rocks craig orchudd overmanning gorgyflogi overpainting trosbeintio overpopulate gorboblogi overpopulation gorboblogaeth overpopulations gorboblogaeth override gwrthwneud overrule goruwchreoli overs pelawd (in cricket) overseas tramor overseas tourists twristiaid tramor overseas visitor ymwelydd o wlad dramor overseas visitors ymwelydd o wlad dramor oversecretion gorsecretiad oversecretions gorsecretiad overseer goruchwyliwr overseers goruchwyliwr oversew amylu oversew stitch pwyth amylu oversew stitches pwyth amylu overshot casting castin gorymyl overshot castings castin gorymyl overshot wheel rhod uwchredol overshot wheels rhod uwchredol overspecialization gorarbenigo overspill gorlif overspill gorlifo overspills gorlif overstimulation gorsymbyliad overstimulations gorsymbyliad oversubscribe gordanysgrifio overswing tros swing (bent arm) overswing tros swing freichsyth (long arm) overswings tros swing (bent arm) overswings tros swing freichsyth (long arm) overtake goddiweddyd overthrow of the monarchy dymchweliad y frenhiniaeth overtighten gordynhau overtime goramser overtimes goramser overtone uwchdon overtones uwchdon overtraining gorhyfforddi overture agorawd overtures agorawd overtype trosdeipiad overtype trosdeipio overtypes trosdeipiad overutilize gorddefnyddio overview golwg cyffredinol overviews golwg cyffredinol overweight dros bwysau overweight gorbwysedd overweights gorbwysedd overwrap troslap overwraps troslap overwrite trosysgrifo oviduct dwythell wyau oviducts dwythell wyau oviparous dodwyol ovipositor wyddodydd ovipositors wyddodydd ovolo ofolo ovolo moulding mowldin ofolo ovolo mouldings mowldin ofolo ovolo plane plaen ofolo ovolo planes plaen ofolo ovulate ofylu ovulation ofwliad ovulations ofwliad ovule ofwl ovules ofwl ovum ofwm ovums ofwm owner perchennog owner occupier perchennog preswyl owner occupiers perchennog preswyl owners perchennog ownership perchenogaeth ownerships perchenogaeth ox bow lake ystumllyn ox bow lakes ystumllyn ox-blend blew ych ox-blend brush brwsh blew ych ox-blend brushs brwsh blew ych ox-blends blew ych ox-ear hair brush brwsh blew clust ych ox-ear hair brushs brwsh blew clust ych ox-gall bustl ych ox-galls bustl ych ox-hair brush brwsh blew ych ox-hair brushs brwsh blew ych oxalic acid asid ocsalig oxalic acids asid ocsalig oxaloacetic acid asid ocsaloasetig oxaloacetic acids asid ocsaloasetig oxidant ocsidydd oxidants ocsidydd oxidase ocsidas oxidases ocsidas oxidation ocsidiad oxidation number rhif ocsidiad oxidation numbers rhif ocsidiad oxidation of fuels ocsidio tanwyddau oxidation state cyflwr ocsidiad oxidation states cyflwr ocsidiad oxidations ocsidiad oxidative phosphorylation ffosfforyleiddiad ocsidiol oxidative phosphorylations ffosfforyleiddiad ocsidiol oxide ocsid oxides ocsid oxidization ocsideiddiad oxidizations ocsideiddiad oxidize ocsidio oxidized ocsidiedig oxidizing agent ocsidydd oxidizing agents ocsidydd oxidizing bleach cannydd ocsidio oxidizing bleaches cannydd ocsidio oxidoreductase ocsidoredwctas oxidoreductases ocsidoredwctas oxy-acetylene ocsi-asetylen oxy-acetylene welding weldio ocsi-asetylen oxy-acetylenes ocsi-asetylen oxygen ocsigen (O) oxygen converter furnace ffwrnais drawsnewidydd ocsigen oxygen converter furnaces ffwrnais drawsnewidydd ocsigen oxygen debt dyled ocsigen oxygen debts dyled ocsigen oxygen loading llwytho ocsigen oxygen loadings llwytho ocsigen oxygen therapy therapi ocsigen oxygen-haemoglobin dissociation curve cromlin ddaduniad ocsigen-haemoglobin oxygen-haemoglobin dissociation curves cromlin ddaduniad ocsigen-haemoglobin oxygen-haemoglobin equilibrium curve cromlin gydbwysedd ocsigen-haemoglobin oxygen-haemoglobin equilibrium curves cromlin gydbwysedd ocsigen-haemoglobin oxygenate ocsigenu oxygenated ocsigenedig oxygenated blood gwaed ocsigenedig oxygenated bloods gwaed ocsigenedig oxygenateds ocsigenedig oxygenation ocsigeniad oxygenations ocsigeniad oxygens ocsigen (O) oxyhaemoglobin ocsihaemoglobin oxyhaemoglobins ocsihaemoglobin oxytocin ocsitosin oxytocins ocsitosin ozone oson ozone depletion darwagiad oson ozone depletions darwagiad oson ozone layer haen oson ozone layers haen oson ozones oson ozonolysis osonolysis p-n junction cyswllt p-n p-n junctions cyswllt p-n pH pH pH value gwerth pH pH values gwerth pH pH-meter mesurydd pH pH-meters mesurydd pH pace rhediad (of lesson) pacemaker rheoliadur (for heart) pacemakers rheoliadur (for heart) paces rhediad (of lesson) pacification heddychiad pacifications heddychiad pacifism heddychiaeth pacifisms heddychiaeth pacifist heddychwr pacifists heddychwr pacify heddychu pack pac pack pacio pack animal anifail pwn pack animals anifail pwn pack ice pacrew pack ices pacrew pack-horse pynfarch pack-horses pynfarch package pac package pecyn packages pac packages pecyn packaging defnydd pacio packaging material deunyddiau pacio packagings defnydd pacio packed paciedig packet pecyn packet port pacedborth packet ports pacedborth packet steamer pacedlong packet steamers pacedlong packet switching switsio pecynnau packet switching network rhwydwaith switsio pecynnau packet switching networks rhwydwaith switsio pecynnau packets pecyn packing pacin packing pacio packing density dwysedd pacio packing waste gwastraff pacio packing wastes gwastraff pacio packings pacin packs pac pact cytundeb pacts cytundeb pad pad pad padio pad saw llif dwll clo pad saws llif dwll clo pad stitch pwyth pad pad stitches pwyth pad padding padin padding stitch pwyth padio padding stitches pwyth padio paddings padin paddle padl paddle padlo paddle rhodlen paddle firm padlo'n gadarn paddle light padlo'n araf paddle steamer rhodlong paddle steamers rhodlong paddles padl paddles rhodlen paddock padog paddocks padog paddy field cae padi paddy fields cae padi padlock clo clwt padlocks clo clwt paediatrician paediatregydd paediatricians paediatregydd paediatrics paediatreg paedophile paedoffilydd paedophiles paedoffilydd pagan pagan paganism paganiaeth paganisms paganiaeth pagans pagan page tudalen page tudalennu page boundary ffin tudalen page break toriad tudalen page breaks toriad tudalen page fault gwall tudalen page faults gwall tudalen page lines canllawiau page orientation cyfeiriadaeth tudalen page orientations cyfeiriadaeth tudalen page setup cysodi tudalen page swap cyfnewidiad tudalen page swaps cyfnewidiad tudalen pageant pasiant pageantry pasiantri pageants pasiant paged tudalennog pages tudalen paginate tudalennu pagination tudaleniad paginations tudaleniad pagoda pagoda pagodas pagoda pain poen pain receptor derbynnydd poen pain receptors derbynnydd poen painful poenus painkiller cyffur lleddfu poen painkillers cyffur lleddfu poen pains poen paint paent paint peintio paint brush brwsh paent paint brushs brwsh paent paint finish gorffeniad paent paint finishs gorffeniad paent paint remover tynnwr paent paint removers tynnwr paent paint solvent hydoddydd paent paint solvents hydoddydd paent painted resist gwrthydd wedi'i beintio painted resists gwrthydd wedi'i beintio painter arlunydd (of pictures) painter peintiwr (of house etc) painter rhaff glymu (=rope) painters arlunydd (of pictures) painters peintiwr (of house etc) painters rhaff glymu (=rope) painting paentiad (=painted picture) painting peintio (of process or art) painting brush brwsh peintio painting brushs brwsh peintio painting knife cyllell beintio painting knifes cyllell beintio painting medium cyfrwng peintio painting mediums cyfrwng peintio paintings paentiad (=painted picture) paints paent paintwork peintwaith paintworks peintwaith pair paru pair pâr pair activities gweithgareddau mewn parau paired fins esgyll paredig paired reading darllen mewn pâr paired terraces cerlannau cyfatebol pairing gwau â dwy wialen (weaving with two canes) pairing pariad pairings pariad pairs pâr palaeography palaeograffeg palaeolithic palaeolithig palaeontology palaeontoleg palate taflod palates taflod pale golau (of colour) pale gwelw (in general) pale cadmium yellow melyn cadmiwm golau pale cadmium yellows melyn cadmiwm golau pale chrome yellow melyn crôm golau pale chrome yellows melyn crôm golau pale colour lliw golau pale colours lliw golau pale lemon yellow melyn lemwn golau pale lemon yellows melyn lemwn golau pale yellow melyn golau (enamelling colour) pale yellows melyn golau (enamelling colour) palette palet palette knife cyllell balet palette knifes cyllell balet palettes palet palindrome palindrom palindromes palindrom paling ffens bolion palings ffens bolion palisade palisâd palisade cell cell balis palisade cells cell balis palisade layer haen balis palisade layers haen balis palisades palisâd pall cochl palladium paladiwm (Pd) palladiums paladiwm (Pd) palliative care gofal lliniarol palliative cares gofal lliniarol pallid llwydaidd pallium paliwm palliums paliwm palls cochl palm cledr (of hand) palm palf (of anchor) palm palmwydden (tree) palm kernel cnewyllyn palmwydd palm kernels cnewyllyn palmwydd palm print cledrbrint palm prints cledrbrint palmer palmwr palmers palmwr palms cledr (of hand) palms palf (of anchor) palms palmwydden (tree) palmtop cledriadur (computer) palmtops cledriadur (computer) palp palp palpation teimlad cyffyrddol palpations teimlad cyffyrddol palpitation crychguriad palpitations crychguriad palps palp palpus palpws palstave palstaf palstaves palstaf pampas paith pamphleteer pamffledwr pamphleteering pamffledu pamphleteers pamffledwr pan cletir clai (=substratum of soil) pan padell (=vessel) pan tremio (of camera) pan sensor ring alch hydeiml pan sensor rings alch hydeiml pan-head rivet rhybed penpan pan-head rivets rhybed penpan panchromatic pancromatig pancreas pancreas pancreatic duct dwythell bancreatig pancreatic ducts dwythell bancreatig pane cwarel (of glass) panel panel panel construction adeiladwaith panel panel constructions adeiladwaith panel panel gauge medrydd panel panel gauges medrydd panel panel infill llenwad panel panel infills llenwad panel panel materials defnyddiau panel panel of assessors panel o aseswyr panel pin pin panel panel pins pin panel panel saw llif banel panel saws llif banel panelled door drws panelog panelled doors drws panelog panelled skirt sgert baneli panelled skirts sgert baneli panels panel panes cwarel (of glass) panhandle estynwlad panhandles estynwlad panicle panigl panicles panigl paning hammer morthwyl twcio paning hammers morthwyl twcio panj piare / panj pyare panj piare / panj pyare pannage mesobr pannages mesobr panorama panorama panoramas panorama panoramic panoramig panpipes pibau Pan panplain llifwastadedd panplains llifwastadedd panplanation llifwastadiant panplanations llifwastadiant panslavism panslafiaeth panslavisms panslafiaeth pant dyhefod pantile teilsen grom pantiles teilsen grom pantler pantler pantlers pantler pantograph pantograff pantographs pantograff pantomime pantomeim pantomimes pantomeim pantonal pangyweiraidd pantonality pangyweiredd pants pants papacy pabaeth papal pabaidd papal consistory consistori'r Pab papal encyclical cylchlythyr y Pab papal encyclicals cylchlythyr y Pab papal legate legad y Pab papal legates legad y Pab papal notary notari'r Pab papal reaction adwaith y Pab papal reactions adwaith y Pab paper papur paper papuro paper back clawr papur paper backed hessian hesian cefn papur paper backed hessians hesian cefn papur paper backs clawr papur paper binding rhwymyn papur paper bindings rhwymyn papur paper case cas papur paper cases cas papur paper circle cylch papur paper circles cylch papur paper clip clip papur paper clips clip papur paper cone côn papur paper cones côn papur paper disc disg papur paper discs disg papur paper fastener pìn clymu papur paper fasteners pìn clymu papur paper figure ffigur papur paper figures ffigur papur paper layer head pen haenau papur paper layer heads pen haenau papur paper low condition cyflwr papur isel paper low conditions cyflwr papur isel paper model model papur paper models model papur paper money arian papur paper mosaic mosaig papur paper mosaics mosaig papur paper plate plât papur paper plates plât papur paper pulp mwydion papur paper shapes ffurfiau papur paper sizes meintiau papur paper tape tâp papur paper tape reader darllenydd tâp papur paper tape readers darllenydd tâp papur paper tapes tâp papur paper varnish farnais papur paper varnishs farnais papur paper-back edition argraffiad clawr papur paper-back editions argraffiad clawr papur papers papur papier mâché mwydion papur papilla papila papillary papilaidd papillas papila papilliform papiliffurf papist pabydd papist pabyddol papists pabydd pappus papws papyrus papurfrwyn par llawn werth (=full value) parable dameg parables dameg parabola parabola parabolas parabola parabolic curve cromlin barabolig parabolic curves cromlin barabolig parabolical parabolig paraboloid paraboloid paraboloids paraboloid parachute parasiwt parachutes parasiwt paraclete diddanydd paracletes diddanydd parade parêd parades parêd paradise paradwys paradises paradwys paradox paradocs paradox of thrift paradocs cynildeb paradoxes paradocs paraesthesia pigau mân paraffin paraffîn paraffin wax cwyr paraffîn paraffin waxes cwyr paraffîn paraffins paraffîn paragraph paragraff paragraph paragraffu paragraph break toriad paragraff paragraph breaks toriad paragraff paragraph format fformat paragraff paragraph formats fformat paragraff paragraphs paragraff parallax paralacs parallaxes paralacs parallel cyflin (in art and technology) parallel cyfochrog (in general and in music) parallel paralel (in geometry and electronics) parallel adder adydd paralel parallel adders adydd paralel parallel bars barrau cyflin parallel circuit cylched baralel parallel circuits cylched baralel parallel consecutive eighths wythfedau dilynol parallel consecutive fifths pumedau cyfochrog dilynol parallel edges ymylon paralel parallel fifths and octaves pumedau ac wythfedau cyfochrog parallel flow llif cyfochrog parallel flows llif cyfochrog parallel gutter cafn cyflin parallel gutters cafn cyflin parallel jaw vice feis safnau paralel parallel jaw vices feis safnau paralel parallel key allwedd baralel parallel motion mudiant paralel parallel motions mudiant paralel parallel nailing hoelio cyflin parallel octaves wythfedau cyfochrog parallel of latitude paralel lledred parallel port porth paralel parallel ports porth paralel parallel printer argraffydd paralel parallel printers argraffydd paralel parallel processing prosesu paralel parallel punch pwnsh paralel parallel punches pwnsh paralel parallel reamer agorell baralel parallel reamers agorell baralel parallel resistances gwrthiannau paralel parallel resonant circuit cylched gysain baralel parallel resonant circuits cylched gysain baralel parallel shank garan baralel parallel shanks garan baralel parallel sides ochrau paralel parallel transmission trawsyriant paralel parallel transmissions trawsyriant paralel parallel turning turnio cyflin parallelepiped paralelepiped parallelepipeds paralelepiped parallelism cyfochredd parallelisms cyfochredd parallelogram paralelogram parallelogram of vectors’ law deddf paralelogram fectorau parallelograms paralelogram parallels paralel (in geometry and electronics) paralyse parlysu paralysis parlys paramagnetism paramagnetedd paramagnetisms paramagnetedd paramanu paramanw paramanus paramanw paramedic parafeddyg paramedics parafeddyg parameter paramedr parameters paramedr parametric parametrig parametric equation hafaliad parametrig parametric equations hafaliad parametrig paramountcy principle egwyddor prif ystyriaeth paramountcy principles egwyddor prif ystyriaeth parapet canllaw (of bridge) parapet rhagfur (of castle) parapet roof to erchwyn parapet roofs to erchwyn parapets canllaw (of bridge) parapets rhagfur (of castle) paraphrase aralleirio paraphrasing aralleirio parapodium parapodiwm parapodiums parapodiwm parasite parasit parasite population poblogaeth y parasit parasite populations poblogaeth y parasit parasites parasit parasitic parasitig parasitic cone côn parasitig parasitic cones côn parasitig parasitism parasitedd parasitisms parasitedd parasitize parasiteiddio parasitoid ysglyfaethwr parasitaidd parasitoids ysglyfaethwr parasitaidd parasympathetic paraymatebol parathyroid parathyroid parathyroids parathyroid paratroops awyrfilwyr paraxial parechelin parched cras parchment memrwn parchment lace ymylun memrwn parchment laces ymylun memrwn parchments memrwn pardon pardwn pardoned soul enaid rhydd pardoned souls enaid rhydd pardoner pardynwr pardoners pardynwr pardons pardwn parenchyma parencyma parenchymas parencyma parent rhiant parent association cymdeithas rhieni parent associations cymdeithas rhieni parent cell rhiant-gell parent cells rhiant-gell parent company rhiant-gwmni parent counselling cynghori rhieni parent element elfen wreiddiol (radiation) parent elements elfen wreiddiol (radiation) parent isotope isotop gwreiddiol parent isotopes isotop gwreiddiol parent plant rhiant-blanhigyn parent plants rhiant-blanhigyn parent population poblogaeth gysefin parent populations poblogaeth gysefin parent rock mamgraig parent rocks mamgraig parent-teacher association cymdeithas rhieni athrawon parent-teacher associations cymdeithas rhieni athrawon parental care gofal rhieni parental cares gofal rhieni parental characteristics nodweddion rhieni parental choice dewis i rieni parental choices dewis i rieni parental genotype genoteip y rhieni parental genotypes genoteip y rhieni parental influence dylanwad rhieni parental influences dylanwad rhieni parentcraft crefft magu plant parentcrafts crefft magu plant parentheses cromfachau ( ) parenthesis parenthesis parents rhiant parents' charter siarter rhieni parents' charters siarter rhieni parents' evening noson rhieni parents' evenings noson rhieni parents’ expectations disgwyliadau rhieni parenxhymatous parencymol parietal parwydol parietal cell cell barwydol parietal cells cell barwydol paring naddu paring chisel cŷn hir paring chisels cŷn hir paring gouge gaing gau hir paring gouges gaing gau hir paring knife cyllell blicio paring knifes cyllell blicio parinibbana parinibbana (Pali = parinirvana Sanskrit) parinibbanas parinibbana (Pali = parinirvana Sanskrit) parish plwyf parish church eglwys blwyf parish churches eglwys blwyf parish relief cymorth plwyf parish reliefs cymorth plwyf parishioner plwyfolyn parishioners plwyfolyn parishs plwyf parity cydraddoldeb (of status etc) parity paredd (in physics) parity bit did paredd parity bits did paredd parity check prawf paredd parity checks prawf paredd park parc park or ornamental grounds parc neu erddi addurnol parkland parcdir parkland avenue rhodfa parcdir parkland avenues rhodfa parcdir parklands parcdir parks parc parley cyd-drafod parliament senedd parliamentarian seneddwr parliamentarians seneddwr parliamentary seneddol parliamentary reform diwygio seneddol parliamentary reforms diwygio seneddol parliamentary sovereignty sofraniaeth y senedd parliaments senedd parochial plwyfol parquet parquet parquet floor llawr parquet parquet floors llawr parquet parquets parquet parroting parota parry pario parry by detachment pario drwy ysgaru parry by opposition pario drwy wrthwynebu parse dosrannu parsing dosrannol parsonage persondy parsonages persondy part darn (=component, piece) part rhan (in general) part book rhanlyfr part books rhanlyfr part exchange rhan-gyfnewid part exchange allowance lwfans rhan-gyfnewid part exchange allowances lwfans rhan-gyfnewid part exchange item eitem ran-gyfnewid part exchange items eitem ran-gyfnewid part exchanges rhan-gyfnewid part front elevation rhan flaenolwg part front elevations rhan flaenolwg part time teacher athrawes ran amser (female) part time teacher athro rhan amser (male) part time teachers athrawes ran amser (female) part time teachers athro rhan amser (male) part view rhanolwg part views rhanolwg part-section rhandrychiad part-sectional rhandrychiadol part-sectional elevation golwg rhandrychiadol part-sectional elevations golwg rhandrychiadol part-sectional plan uwcholwg rhandrychiadol part-sectional plans uwcholwg rhandrychiadol part-sectional view golwg rhandrychiadol part-sectional views golwg rhandrychiadol part-sections rhandrychiad part-time rhan amser part-time education addysg ran amser part-time educations addysg ran amser part-time labour llafur rhan amser part-time labours llafur rhan amser partial rhannol partial carry cario rhannol partial conversion trawsnewid rhannol partial conversions trawsnewid rhannol partial correlation cydberthyniad rhannol partial correlations cydberthyniad rhannol partial differentiation differu rhannol partial exchange separation gwahaniad gwefr rhannol partial exchange separations gwahaniad gwefr rhannol partial fractions ffracsiynau rhannol partial heating gwres rhannol partial heatings gwres rhannol partial pressure gwasgedd rhannol partial pressures gwasgedd rhannol partially blind rhannol ddall partially colour blind rhannol ddall i liwiau partially completed rhannol orffenedig partially deaf rhannol fyddar partially miscible yn rhannol gymysgadwy partible inheritance etifeddiaeth gyfrannol partible inheritances etifeddiaeth gyfrannol participant cyfranogwr participants cyfranogwr participate cymryd rhan participation cyfranogiad participation in sport cyfranogiad mewn chwaraeon participations cyfranogiad particle gronyn particle board bwrdd gronynnau particle boards bwrdd gronynnau particle-particle description disgrifiad gronyn-gronyn particle-particle descriptions disgrifiad gronyn-gronyn particles gronyn particular integryn particular neilltuol (=singled out) particular direction cyfeiriad penodol particular directions cyfeiriad penodol particular integral integryn neilltuol particular integrals integryn neilltuol particular matter mater penodol particular matters mater penodol particular modelling technique techneg fodelu benodol particular modelling techniques techneg fodelu benodol particularism neilltuaeth daleithiol particularisms neilltuaeth daleithiol particulars integryn particulate gronynnol particulate inheritance etifeddiad gronynnol particulate inheritances etifeddiad gronynnol particulate theory of inheritance damcaniaeth ronynnol etifeddiad parting partio (of lathe tools) parting rhaniad parting rhannu parting bead glain rhannu parting beads glain rhannu parting off partio parting off tool erfyn partio parting off tools erfyn partio parting powder powdr partio parting powders powdr partio parting sand tywod partio parting sands tywod partio partings rhaniad partisan partisan partisans partisan partisanship pleidgarwch partisanships pleidgarwch partita partita partitas partita partition dosraniad (in mathematics) partition dosrannu (in mathematics) partition pared (of structure) partition rhaniad (of land etc) partition aspect agwedd dosraniad (of division) partition aspects agwedd dosraniad (of division) partition chromatography cromatograffaeth ddosrannol partition coefficient cyfernod dosrannu partition coefficients cyfernod dosrannu partition function ffwythiant dosraniad partition functions ffwythiant dosraniad partition treaty cytundeb rhannu partition wall pared partition walls pared partitions dosraniad (in mathematics) partitions pared (of structure) partitions rhaniad (of land etc) partly completed rhannol orffenedig partly paid wedi'i dalu'n rhannol (with masculine nouns) partly paid wedi'i thalu'n rhannol (with feminine nouns) partner partner partner dance partner dawns partner dances partner dawns partners partner partnership partneriaeth partnerships partneriaeth parts darn (=component, piece) parts rhan (in general) parts list rhestr ddarnau parts lists rhestr ddarnau parts of a frame rhannau ffrâm parts of file rhannau ffeil parts of plane rhannau plaen parturition esgoriad parturitions esgoriad party plaid pasodoble pasodoble pasodobles pasodoble pass bwlch (in mountains) pass pasio pass pàs (in sport) pass trwydded (=ticket or permit) pass back pasio am nôl pass laws deddfau trwydded (South Africa) pass mark marc pasio pass marks marc pasio pass slip stitch over pwyth dros bwyth (p.s.s.o) pass the ball pasio'r bêl passacaglia passacaglia passacaglias passacaglia passage taith (=journey) passage tramwyfa (=route) passage grave bedd cyntedd passage graves bedd cyntedd passage of water llwybr y dŵr passages taith (=journey) passages tramwyfa (=route) passerine golfan passerines golfan passing note nodyn camu passing notes nodyn camu passing of time treigl amser passive goddefol passive abuse camdriniaeth oddefol passive abuses camdriniaeth oddefol passive audience cynulleidfa oddefol passive audiences cynulleidfa oddefol passive comprehension dealltwriaeth oddefol passive comprehensions dealltwriaeth oddefol passive flux fflwcs goddefol passive fluxes fflwcs goddefol passive immunity imiwnedd goddefol passive learning dysgu goddefol passive resistance gwrthwynebiad di-drais passive resistances gwrthwynebiad di-drais passive transport cludiant goddefol passive transports cludiant goddefol passive vocabulary geirfa oddefol passivity goddefedd password cyfrinair passwords cyfrinair paste gludo (in computing) paste past paste pastio (wallpaper) paste brush brwsh past paste brushs brwsh past paste colour lliw past paste colourant lliwydd past paste colourants lliwydd past paste colours lliw past paste combing cribo past paste filler llenwad past paste fillers llenwad past paste flux fflwcs past paste fluxes fflwcs past paste powder powdr past paste powders powdr past paste spreader lledaenydd past paste spreaders lledaenydd past pastel pastel pastel fixative sefydlyn pastel pastel fixatives sefydlyn pastel pastels pastel pastes past pasteurization pasteureiddiad pasteurizations pasteureiddiad pasteurize pasteureiddio pastiche pastiche pastiches pastiche pastime adloniant pastimes adloniant pastor gweinidog (of church) pastoral bugeiliol pastoral care gofal bugeiliol pastoral cares gofal bugeiliol pastoral curriculum cwricwlwm bugeiliol pastoral curriculums cwricwlwm bugeiliol pastoral farming ffermio bugeiliol pastoral symphony symffoni fugeiliol pastoral tutor tiwtor bugeiliol pastoral tutors tiwtor bugeiliol pastoralism bugeilyddiaeth pastoralisms bugeilyddiaeth pastors gweinidog (of church) pastry board bwrdd crwst pastry boards bwrdd crwst pasture porfa pastures porfa pasty pastog (of soil) pat bounce tampio pat dry sychu'n dyner patch clwt patch clytio patch pocket poced glwt patch pockets poced glwt patches clwt patchwork clytwaith patchworks clytwaith patchy grass glaswellt clytiog patella padell pen-glin patellar padellog patellas padell pen-glin patent patent patent fee ffi batent patent fees ffi batent patents patent paternal tadol paternal chromosome cromosom o du'r tad paternal chromosomes cromosom o du'r tad paternalism agwedd dadol paternalisms agwedd dadol path llwybr path of reaction llwybr adwaith pathname enw llwybr pathnames enw llwybr pathogen pathogen pathogenic pathogenaidd pathogens pathogen pathological patholegol pathologist patholegydd pathologists patholegydd pathology patholeg paths llwybr pathway llwybr patient claf patient appliances offer cleifion patient satisfaction survey arolwg bodlonrwydd cleifion patients claf patina patina (=sheen) patinas patina (=sheen) patriarch patriarch patriarchal patriarchaidd patriarches patriarch patriarchy patriarchaeth patrician uchelwr patrician uchelwrol patricians uchelwr patrilineal treftadol patrimonial state gwladwriaeth dreftadol patrimonial states gwladwriaeth dreftadol patrimony treftadaeth patriot gwladgarwr patriotic gwlatgar patriotism gwladgarwch patriotisms gwladgarwch patriots gwladgarwr patrol patrôl patrols patrôl patron noddwr patronage nawdd patronages nawdd patronize noddi patrons noddwr patronymic patronymig patter song cân barablu patter songs cân barablu pattern ffigur (in dance) pattern patrwm pattern design cynllun patrymol pattern designer dylunydd patrymau pattern designers dylunydd patrymau pattern designs cynllun patrymol pattern layout cynllun gosod patrwm pattern layouts cynllun gosod patrwm pattern markings marciau patrwm pattern material defnydd patrymog pattern materials defnydd patrymog pattern of behaviour patrwm ymddygiad pattern of economic activity patrwm o weithgarwch economaidd pattern piece darn patrwm pattern pieces darn patrwm patterned patrymog patterned paper papur patrymog patterned papers papur patrymog patterned surface arwyneb patrymog patterned surfaces arwyneb patrymog patterned weave gwehyddiad patrymog patterned weaves gwehyddiad patrymog patterns ffigur (in dance) patterns patrwm patting patio pauper tlotyn paupers tlotyn pause daliant (sign in music) pause saib (in general) pauses daliant (sign in music) pauses saib (in general) pavane pavane pavanes pavane pavement palmant pavement epithelium epitheliwm palmantaidd pavement epitheliums epitheliwm palmantaidd pavements palmant pavilion pafiliwn pavilions pafiliwn paw foot troed bawen paw foots troed bawen pawl pawl pawl and ratchet mechanism mecanwaith pawl a chlicied pawl and ratchet mechanisms mecanwaith pawl a chlicied pawls pawl pawn gwystlo pawnbroker gwystlwr pawnbrokers gwystlwr pay cyflog pay talu pay advice hysbysiad talu pay advices hysbysiad talu pay attention rhoi sylw pay-slip slip cyflog pay-slips slip cyflog payable taladwy payment tâl payment on account tâl ar gyfrif payment slip taleb payment slips taleb payment system system dalu payment systems system dalu payments tâl payroll rhestr gyflogau payroll system system gyflogau payroll systems system gyflogau payrolls rhestr gyflogau paysage tirlun (landscape) paysages tirlun (landscape) peace heddwch (in general) peace tangnefedd (of God) peace offering hedd-offrwm peace offerings hedd-offrwm peace settlement ardrefniant heddwch peace settlements ardrefniant heddwch peace treaty cytundeb heddwch peaceable army byddin heddychlon peaceful co-existence cyd-fyw heddychlon peacemaker cymodwr peacemakers cymodwr peaces heddwch (in general) peaces tangnefedd (of God) peak anterth (=time of greatest success) peak brig (=highest point in a curve / graph etc) peak copa (of mountain) peak pigyn (=pointed part) peak current cerrynt brig peak currents cerrynt brig peak demand galw brig peak demands galw brig peak flow measurement mesuriad anterth llif peak flow measurements mesuriad anterth llif peak flow rate cyfradd anterth llif peak flow rates cyfradd anterth llif peak hour awr frig peak hours awr frig peak input volts foltiau mewnbwn brig (piv) peak period traffic trafnidiaeth oriau brig peak period traffics trafnidiaeth oriau brig peak population poblogaeth frig peak populations poblogaeth frig peak value brigwerth peak value intersection croestoriad uchafwerth peak value intersections croestoriad uchafwerth peak values brigwerth peak writing ysgrifennu uchafbwynt peak-to-peak brig i frig peak-to-peaks brig i frig peaks anterth (=time of greatest success) peaks brig (=highest point in a curve / graph etc) peaks copa (of mountain) peaks pigyn (=pointed part) peanuts cnau mwnci pearl barley haidd gwyn pearl button botwm perl pearl buttons botwm perl pearl glue glud perl pearl glues glud perl pearl lamp lamp berl pearl lamps lamp berl pearlite perlit pearlites perlit peasant gwerinwr peasantry gwerin wledig peasants gwerinwr peat mawn peat bog mawnog peat bogs mawnog peat hag torlan fawn peat hags torlan fawn peats mawn pebble cerigyn pebble dash gro chwipio pebble dashs gro chwipio pebbles cerigyn pectic acid asid pectig pectic acids asid pectig pectin pectin pectinase pectinas pectinases pectinas pectins pectin pectoral fin asgell bectoral pectoral fins asgell bectoral pectoral girdle gwregys pectoral pectoral girdles gwregys pectoral pedal pedal pedal pedalu pedal harp telyn bedal pedal harps telyn bedal pedal loom gwŷdd pedal pedal looms gwŷdd pedal pedal notch rhic pedal pedal notches rhic pedal pedal position safle'r pedal pedal positions safle'r pedal pedals pedal pedestal pedestal pedestal drill dril pedestal pedestal drilling machine peiriant drilio pedestal pedestal drilling machines peiriant drilio pedestal pedestal drills dril pedestal pedestal grinder llifanydd pedestal pedestal grinders llifanydd pedestal pedestal rock craig gynnal pedestal rocks craig gynnal pedestals pedestal pedestrian cerddwr pedestrian crossing croesfan gerddwyr pedestrian crossings croesfan gerddwyr pedestrians cerddwr pedicel pedicel pedicels pedicel pedicle pedicl pedicles pedicl pedigree tras pedigree stock stoc o dras pedigree stocks stoc o dras pedigrees tras pediment pediment pediments pediment pediplain pediplan pediplains pediplan pediplanation pediplaniant pediplanations pediplaniant pedological priddegol pedology priddeg peduncle pedwncl peduncles pedwncl pedunculate pedynclaidd peel pilio (from block) peeling pilio peeling movement ôl-redeg (in sport) peen pig morthwyl peen end hammer morthwyl pigfain peen end hammers morthwyl pigfain peens pig morthwyl peer arglwydd (=lord) peer cyfoed (=contemporary) peer feedback adborth cymheiriaid peer feedbacks adborth cymheiriaid peer group grŵp cyfoedion (formal) peer groups grŵp cyfoedion (formal) peer pressure pwysau gan gyfoedion peerage arglwyddi'r deyrnas peers arglwydd (=lord) peers cyfoed (=contemporary) peg peg peg pegio peg box blwch ebill peg boxes blwch ebill pegged tenon tyno wedi'i begio pegged tenons tyno wedi'i begio pelagic eigionol pelagic fishing pysgota'r wyneb pellagra pelagra pellagras pelagra pellet pelen pellets pelen pellicle pelicl pellicles pelicl pelmet pelmet pelmets pelmet pelvic pelfig pelvic cavity ceudod pelfig pelvic girdle gwregys pelfig pelvic girdles gwregys pelfig pelvic space gwagle pelfig pelvic spaces gwagle pelfig pelvis pelfis pen ysgrifbin (for writing) pen and ink pen ac inc pen and wash pen a golchiad pen lettering llythrennu pen penal laws deddfau cosbi penal reform diwygio'r deddfau cosbi penal system trefn gosbi penal systems trefn gosbi penalize cosbi penalty bwli cosb (shot) penalty cosb penalty area cwrt cosbi penalty areas cwrt cosbi penalty box blwch cosbi penalty boxes blwch cosbi penalty bully bwli cosb penalty clause cymal cosbi penalty clauses cymal cosbi penalty corner cornel gosb penalty corners cornel gosb penalty goal gôl gosb penalty goals gôl gosb penalty kick cic gosb penalty kicks cic gosb penalty pass pàs gosb penalty spot smotyn gwyn penalty spots smotyn gwyn penalty try cais cosb penance penyd penances penyd pencil pensil pencil bit haearn sodro pensil pencil bits haearn sodro pensil pencil gauge medrydd pensil pencil gauges medrydd pensil pencil sharpener miniwr pencil sharpeners miniwr pencil slim skirt sgert gul pencil slim skirts sgert gul pencils pensil pendant crog pendant tlws crog pendant light golau crog pendant lights golau crog pendants tlws crog pendulum pendil pendulums pendil peneplanation lledwastadiad peneplanations lledwastadiad penetrable treiddadwy penetrance treiddiad (genetic) penetrances treiddiad (genetic) penetrate treiddio penetrating treiddiol penetrating powers pwerau treiddio penetration treiddiad penetration price pris treiddio penetration pricing prisiau treiddio penetrations treiddiad penicillin penisilin penicillins penisilin penillion penillion (cerdd dant) penillion singer canwr penillion penillion singers canwr penillion peninsula gorynys peninsular India India orynysol peninsulas gorynys penis pidyn penmanship crefft ysgrifennu penmanships crefft ysgrifennu penny post post ceiniog penny posts post ceiniog penny rate treth geiniog penny rates treth geiniog pension pensiwn pensioner pensiynwr pensioners pensiynwr pensions pensiwn pentadecagon pentadecagon pentadecagons pentadecagon pentagon pentagon pentagonal pentagonol pentagonal pyramid pyramid pentagonol pentagonal pyramids pyramid pentagonol pentagons pentagon pentagram pentagram pentagrams pentagram pentatonic pentatonig pentatonic scale graddfa bentatonig pentatonic scales graddfa bentatonig penthouse penty penthouses penty pentomino pentomino pentose pentos pentoses pentos pentosuria pentoswria pentosurias pentoswria penumbra penwmbra penumbras penwmbra peplum peplwm peplums peplwm pepper-pot pot pupur pepper-pots pot pupur peptide peptid peptides peptid per capita allowance lwfans y pen per capita allowances lwfans y pen per capita grant grant y pen per capita grants grant y pen per cent y cant per head y pen perborate perborad perborate bleach cannydd perborad perborate bleaches cannydd perborad perborates perborad perceive canfod percentage canran percentage carbon content canran cynnwys carbon percentage carbon contents canran cynnwys carbon percentage change newid yng nghanran percentage changes newid yng nghanran percentage composition canran cyfansoddiad percentage compositions canran cyfansoddiad percentage moisture content canran cynnwys lleithder percentage moisture contents canran cynnwys lleithder percentage rise or fall canran y cynnydd neu'r gostyngiad percentage rise or falls canran y cynnydd neu'r gostyngiad percentage yield arennill y cant percentage yields arennill y cant percentages canran percentile canradd percentile point pwynt canradd percentile points pwynt canradd percentile ranking safle canraddol percentile rankings safle canraddol percentiles canradd perception canfyddiad perceptions canfyddiad perceptual canfyddiadol perceptual difficulty anhawster canfyddiad perch clwyd (for bird) perch draenog (=type of fish) perched block crogfaen perched blocks crogfaen perched water table lefel trwythiad dŵr clo perched water tables lefel trwythiad dŵr clo perches clwyd (for bird) perches draenog (=type of fish) percolate trylifo percolated coffee coffi percoladur percolated coffees coffi percoladur percolation trylifiad percolations trylifiad percolator percoladur percolators percoladur percussion trawiad percussion band band taro percussion bands band taro percussion headed flint callestr daro percussion headed flints callestr daro percussion instrument offeryn taro percussion instruments offeryn taro percussion part rhan daro percussion parts rhan daro percussion section adran daro percussion sections adran daro percussions trawiad percussive ergydiol peregrine falcon hebog tramor peregrine falcons hebog tramor perennial lluosflwydd (in biology) perennial parhaol (figuratively) perennial flower blodyn lluosflwydd perennial flowers blodyn lluosflwydd perfect perffaith perfect cadence diweddeb berffaith perfect cadences diweddeb berffaith perfect competition cystadleuaeth berffaith perfect competitions cystadleuaeth berffaith perfect interval cyfwng perffaith perfect intervals cyfwng perffaith perfect pitch traw perffaith perfect pitches traw perffaith perfect square sgwâr perffaith perfect squares sgwâr perffaith perforate tyllu perforated tyllog perforated pattern patrwm tyllog perforated patterns patrwm tyllog perforating wheel olwyn dyllu perforating wheels olwyn dyllu perforation trydylliad (on stamp) perforation twll (=hole) perforations trydylliad (on stamp) perforations twll (=hole) perforator tyllwr perforators tyllwr perform perfformio perform structured tasks perfformio tasgau strwythuredig performance perfformiad performance appraisal gwerthusiad perfformiad performance appraisals gwerthusiad perfformiad performance criteria meini prawf perfformiad performance fabric ffabrig perfformio performance fabrics ffabrig perfformio performance indicator dangosydd perfformiad performance indicators dangosydd perfformiad performance test prawf perfformiad performance tests prawf perfformiad performance workshop gweithdy perfformio performance workshops gweithdy perfformio performances perfformiad performer perfformiwr performers perfformiwr performing arts celfyddydau perfformio perfume persawr perfume persawru perfumes persawr perfuse darlifo perfusion darlifiad perfusions darlifiad peri-operative care gofal yn ystod y llawdriniaeth peri-operative cares gofal yn ystod y llawdriniaeth pericardial cavity ceudod pericardiol pericardium pericardiwm pericardiums pericardiwm pericarp pericarp pericarps pericarp pericline periclin periclines periclin pericycle periseicl pericycles periseicl perigean tide llanw perigeaidd (perigee) perigean tides llanw perigeaidd (perigee) perigee perige perigees perige periglacial ffinrewlifol perihelion perihelion perihelions perihelion perilymph perilymff perilymphs perilymff perimeter perimedr (in geometry) perimeter of the sector perimedr y sector perimeters perimedr (in geometry) perimeters of simple shapes perimedrau siapiau syml perinatal amenedigol period cyfnod period costume gwisg cyfnod period costumes gwisg cyfnod period of oscillation cyfnod yr osgiliad period play drama gyfnod periodic cyfnodol periodic changes newidiadau cyfnodol periodic table tabl cyfnodol periodic tables tabl cyfnodol periodical cyfnodolyn periodicals cyfnodolyn periodicity cyfnodedd periods cyfnod peripatetic cylchynol peripatetic teacher athrawes gylchynol (female) peripatetic teacher athro cylchynol (male) peripatetic teachers athrawes gylchynol (female) peripatetic teachers athro cylchynol (male) peripediment peripediment peripediments peripediment peripheral amgantol (in geometry) peripheral amgantydd (in geometry) peripheral perifferol (of computer) peripheral perifferolyn (of computer) peripheral area ardal ymylol peripheral areas ardal ymylol peripheral interface rhyngwyneb perifferol peripheral interface adaptor addasydd rhyngwyneb perifferol (PIA) peripheral interface adaptors addasydd rhyngwyneb perifferol (PIA) peripheral interfaces rhyngwyneb perifferol peripheral interrupt ymyriad perifferol peripheral interrupts ymyriad perifferol peripheral nervous system system nerfol berifferol peripheral nervous systems system nerfol berifferol peripheral speed buanedd perifferol peripheral speeds buanedd perifferol peripherals amgantydd (in geometry) peripherals perifferolyn (of computer) periphery amgant (in geometry) periphery perifferi periscope perisgop periscopes perisgop perishable darfodus perishable goods nwyddau darfodus peristalsis peristalsis perithecium peritheciwm peritheciums peritheciwm peritoneal dialysis dialysis peritoneaidd perivitelline space gwagle perifitelin perivitelline spaces gwagle perifitelin perjure tyngu anudon perjury anudoniaeth permafrost rhew parhaol permafrosts rhew parhaol permanence sefydlogrwydd (=stability) permanences sefydlogrwydd (=stability) permanent parhaol (in general) permanent sefydlog (of colour) permanent colour lliw sefydlog permanent colours lliw sefydlog permanent grazing pori parhaol permanent hardness caledwch parhaol permanent joining uno parhaol permanent joint uniad parhaol permanent joints uniad parhaol permanent pasture porfa barhaol permanent pastures porfa barhaol permanent pleating pletio parhaol permanent press pres parhaol permanent tooth dant parhaol permanent tooths dant parhaol permanently stiffened cyfnerthu parhaol (finish) permeability athreiddedd permeability of free space athreiddedd gofod rhydd permeable athraidd permeable membrane pilen athraidd permeable membranes pilen athraidd permissible caniataol permissive goddefol permissive legislation deddfwriaeth ganiataol permissive legislations deddfwriaeth ganiataol permissive society cymdeithas oddefol permit caniatáu permit caniatâd permits caniatâd permittivity permitifedd permittivity constant cysonyn permitifedd permittivity constants cysonyn permitifedd permittivity of free space permitifedd gofod rhydd permutation trynewid permutations trynewid pernicious anaemia anaemia aflesol pernicious anaemias anaemia aflesol perpendicular perpendicwlar perpendicular arch bwa perpendicwlar perpendicular arches bwa perpendicwlar perpendicular bisector hanerydd perpendicwlar perpendicular bisectors hanerydd perpendicwlar perpendicular distance pellter perpendicwlar perpendicular distances pellter perpendicwlar perpendicular height uchder perpendicwlar perpendicular heights uchder perpendicwlar perpendicular line llinell blwm perpendicular lines llinell blwm perpendiculars perpendicwlar perpetual parhaol perpetual edict cyhoeddeb barhaol perpetual edicts cyhoeddeb barhaol perpetual peace heddwch parhaol perpetual peaces heddwch parhaol perpetual variation amrywiad parhaol perpetual variations amrywiad parhaol perpetuate bytholi persecute erlid persecutes erlid persecution erledigaeth persecutions erledigaeth perseverance dyfalbarhad perseverances dyfalbarhad persistance of vision darlunio parhaus person specification manyleb person person specifications manyleb person personal achievement record cofnod cyrhaeddiad personol personal achievement records cofnod cyrhaeddiad personol personal belief cred bersonol personal beliefs cred bersonol personal capability gallu personol personal computer cyfrifiadur personol personal computer disc operating system system weithredu disg cyfrifiadur personol (PC / DOS) personal computer disc operating systems system weithredu disg cyfrifiadur personol (PC / DOS) personal computers cyfrifiadur personol personal development datblygiad personol personal developments datblygiad personol personal education addysg bersonol personal educations addysg bersonol personal foul ffowl personol personal fouls ffowl personol personal health iechyd personol personal healths iechyd personol personal hygiene hylendid personol personal hygienes hylendid personol personal information gwybodaeth bersonol personal informations gwybodaeth bersonol personal liability atebolrwydd personol personal loan benthyciad personol personal loans benthyciad personol personal programme rhaglen bersonol personal programmes rhaglen bersonol personal record cofnod personol personal records cofnod personol personal reflection myfyrdod personol personal reflections myfyrdod personol personal religious experience profiad crefyddol personol personal religious experiences profiad crefyddol personol personal rule llywodraeth bersonol personal rules llywodraeth bersonol personal safety diogelwch personol personal space gofod personol personal spaces gofod personol personal survival goroesiad personol personal survivals goroesiad personol personal training schedule amserlen hyfforddiant personol personal training schedules amserlen hyfforddiant personol personal tutor tiwtor personol personal tutors tiwtor personol personalism personolyddiaeth personalisms personolyddiaeth personality personoliaeth personality disorder anhwylder personoliaeth personality disorders anhwylder personoliaeth personnel personél personnel records cofnodion personél personnels personél perspective persbectif perspective drawing lluniadu mewn persbectif perspective view golwg persbectif perspective views golwg persbectif perspectives persbectif perspectivity persbectifedd perspex persbecs perspex cement sment persbecs perspex cements sment persbecs perspexes persbecs perspire chwysu persuasive advertising hysbysebu er perswâd persuasive message neges er perswâd persuasive messages neges er perswâd perturbation aflonyddiad perturbation theory damcaniaeth aflonyddiad perturbations aflonyddiad pervious hydraidd pessary pesari pessimistic pesimistaidd pest pla pesticide plaleiddiad pesticides plaleiddiad pestilence haint pestilences haint pestle pestl pestle and mortar pestl a morter pestles pestl pests pla petal petal petals petal petersham petersham petershams petersham petiole petiol petioles petiol petition deiseb petitions deiseb petrification pedreiddiad petrifications pedreiddiad petrified forest fforest betraidd petrified forests fforest betraidd petrochemical industry diwydiant petrocemegol petrol engine peiriant petrol petrol engines peiriant petrol petroleum petroliwm petroleum spirit gwirod petroliwm petroleum spirits gwirod petroliwm petroleums petroliwm petrology petroleg petroselenic acid asid petroselenig petroselenic acids asid petroselenig petticoat pais petticoats pais petty cash arian mân petty cashs arian mân petty larceny mân ladrad petty officer is-swyddog petty officers is-swyddog petty sessions cwrt bach petty theft mân ladrad petty thefts mân ladrad pewter piwter pewters piwter peytrel mwclis pres peytrels mwclis pres phaeophytin ffaeoffytin phaeophytins ffaeoffytin phage ffag phages ffag phagocyte ffagocyt phagocytes ffagocyt phagocytic ffagocytig phagocytosis ffagocytosis phalange ffalang phalanges ffalang phalanx ffalancs phalanxes ffalancs phantom line llinell manylion cudd phantom lines llinell manylion cudd pharmaceutical fferyllol pharmacist fferyllydd pharmacists fferyllydd pharmacy fferyllfa pharyngeal ffaryngeal pharyngeal cavity ceudod y gwddf pharynx ffaryncs pharynxes ffaryncs phase cydwedd (of waves) phase cyfnod (=period or stage in process) phase gwedd (of matter, moon) phase change newid gwedd phase changes newid gwedd phase control rheolaeth gweddau phase controls rheolaeth gweddau phase difference gwahaniaeth gwedd phase differences gwahaniaeth gwedd phase linked gwedd-gysylltiedig phase shift symudiad cydwedd phase shifts symudiad cydwedd phase transition trawsnewidiad gwedd phase transitions trawsnewidiad gwedd phased introduction cyflwyno graddol phases cydwedd (of waves) phases cyfnod (=period or stage in process) phases gwedd (of matter, moon) phases of heart cycle gweddau cylchred y galon phases of the moon gweddau'r lleuad phasor diagram gwedd phasors diagram gwedd phellogen ffelogen phellogens ffelogen phenol ffenol phenol liquid hylif ffenol phenol liquids hylif ffenol phenolic ffenolig phenolics ffenoligion (thermosetting plastics) phenology ffenoleg phenolphthalein ffenolffthalein phenolphthaleins ffenolffthalein phenols ffenol phenomenon ffenomen phenomenons ffenomen phenotype ffenoteip phenotypes ffenoteip phenotypic ffenoteipaidd phenyl thiourea ffenyl thiowrea phenyl thioureas ffenyl thiowrea phenylalanine ffenylalanin phenylalanine hydroxylase ffenylalanin hydrocsylas phenylalanine hydroxylases ffenylalanin hydrocsylas phenylalanines ffenylalanin phenylketonuria ffenylcetonwria phenylketonurias ffenylcetonwria phenylketonuric ffenylcetonwrig pheromone fferomon pheromones fferomon phial ffiol phials ffiol philanthropic dyngarol philanthropist dyngarwr philanthropists dyngarwr philanthropy dyngarwch philosophical problem problem athronyddol philosophical problems problem athronyddol philosophy athroniaeth phlegm fflem phlegms fflem phloem ffloem phloems ffloem phonic ffonig phonic method dull ffonig phonic methods dull ffonig phonocardiogram ffonocardiogram phonocardiograms ffonocardiogram phosphate ffosffad phosphates ffosffad phosphine ffosffin phosphines ffosffin phosphocreatine ffosffocreatin phosphocreatines ffosffocreatin phosphoglyceraldehyde ffosffoglyseraldehyd phosphoglyceraldehydes ffosffoglyseraldehyd phosphoglyseric acid asid ffosffoglyserig phosphoglyseric acids asid ffosffoglyserig phosphokinase ffosffocinas phosphokinases ffosffocinas phospholipid ffosffolipid phospholipids ffosffolipid phosphor ffosffor phosphor bronze ffosfforefydd (non-ferrous alloys) phosphor bronzes ffosfforefydd (non-ferrous alloys) phosphorescence ffosfforesgedd phosphorescences ffosfforesgedd phosphorescent ffosfforesgol phosphoric acid asid ffosfforig phosphoric acids asid ffosfforig phosphors ffosffor phosphorus ffosfforws (P) phosphorylase ffosfforylas phosphorylases ffosfforylas photo story ffotostori photo-emission ffoto-allyriant photo-emissions ffoto-allyriant photocell ffotogell photocells ffotogell photochemistry ffotocemeg photocopier llungopïwr photocopiers llungopïwr photocopy llungopi photocopy llungopïo photodiode ffotodeuod photodiodes ffotodeuod photoelectric ffotodrydanol photoelectric effect effaith ffotodrydanol photoelectric effects effaith ffotodrydanol photoelectricity ffotodrydan photogrammetry ffotogrametreg photograph ffotograff photographic ffotograffig photographic image delwedd ffotograffig photographic images delwedd ffotograffig photographs ffotograff photography ffotograffiaeth photogravure ffoto-ysgythru photometer ffotomedr photometers ffotomedr photometric ffotometrig photometry ffotometreg photomontage montage ffotograffig photomontages montage ffotograffig photon ffoton photon energy egni ffoton photons ffoton photoperiodism ffotogyfnodedd photoperiodisms ffotogyfnodedd photoreceptor goleudderbynnydd photoreceptors goleudderbynnydd photosensitivity goleusensitifedd photosphere ffotosffer photospheres ffotosffer photostat ffotostat photostats ffotostat photosynthesis ffotosynthesis photosynthetic ffotosynthetig phototransistor ffototransistor phototransistors ffototransistor phototropism ffototropedd phototropisms ffototropedd photovoltaic ffotofoltaidd phrase brawddegu phrase read-only memory cof cymal darllen yn unig (PHROM) phreatic water dŵr daear phreatic waters dŵr daear phrenic ffrenig phylogenetic esblygol phylum ffylwm phylums ffylwm physical corfforol (=bodily) physical ffisegol (=of physics) physical activity gweithgaredd corfforol physical area maes ffisegol physical areas maes ffisegol physical care gofal corfforol physical cares gofal corfforol physical change newid corfforol physical changes newid corfforol physical defect nam corfforol physical defects nam corfforol physical dependence dibyniaeth gorfforol physical dependences dibyniaeth gorfforol physical development datblygiad corfforol physical developments datblygiad corfforol physical disability anabledd corfforol physical education addysg gorfforol physical educations addysg gorfforol physical effect effaith gorfforol physical effects effaith gorfforol physical environment amgylchedd ffisegol physical environments amgylchedd ffisegol physical exercise ymarfer corff physical exercises ymarfer corff physical factor ffactor gorfforol physical factors ffactor gorfforol physical features nodweddion ffisegol physical fitness ffitrwydd corfforol physical force grym corfforol physical forces grym corfforol physical handicap anfantais gorfforol physical handicaps anfantais gorfforol physical impairment nam corfforol physical impairments nam corfforol physical maturity aeddfedrwydd corfforol physical measurement mesuriad corfforol physical measurements mesuriad corfforol physical play chwarae corfforol physical processes prosesau ffisegol physical property priodwedd ffisegol physical recreation ymarfer corff physical recreations ymarfer corff physical resource adnodd ffisegol physical resources adnodd ffisegol physically active corfforol weithgar physically handicapped child plentyn â nam corfforol physically handicapped childs plentyn â nam corfforol physician meddyg physicians meddyg physics ffiseg physiognomics ffisionomeg physiological ffisiolegol physiological change newid ffisiolegol physiological changes newid ffisiolegol physiological measurement mesuriad ffisiolegol physiological measurements mesuriad ffisiolegol physiological saline heli ffisiolegol physiological salines heli ffisiolegol physiological status statws ffisiolegol physiologist ffisiolegydd physiologists ffisiolegydd physiology ffisioleg physiotherapist ffisiotherapydd physiotherapists ffisiotherapydd physiotherapy ffisiotherapi physique corffoledd physiques corffoledd phytoplankton ffytoplancton phytoplanktons ffytoplancton phytotoxin llyswenwyn phytotoxins llyswenwyn pianist pianydd pianists pianydd piano piano piano accordion acordion piano piano accordions acordion piano piano hinge colfach hir piano hinges colfach hir piano key nodyn piano piano lock clo piano piano locks clo piano piano score sgôr biano piano scores sgôr biano piano stool stôl biano piano stools stôl biano piano trio triawd piano piano tuner tiwniwr piano piano tuners tiwniwr piano pibgorn pibgorn pibgorns pibgorn piccolo player canwr picolo piccolo players canwr picolo pick up a stitch codi pwyth pick-up tongs gefel godi picket picedu picket picedwr pickets picedwr pickle picl pickle piclo pickle-bath tongs gefel fath picl pickles picl pickup cipyn pickups cipyn picot picot picot edging ymylwaith picot picot edgings ymylwaith picot picots picot pictogram pictogram pictograms pictogram pictograph pictograff pictographs pictograff pictography pictograffeg pictorial darluniadol pictorial art celfyddyd ddarluniol pictorial arts celfyddyd ddarluniol pictorial drawing lluniad darluniol pictorial drawings lluniad darluniol pictorial plan uwcholwg darluniol pictorial plans uwcholwg darluniol pictorial projection tafluniad darluniol pictorial projections tafluniad darluniol pictorial representation portread darluniol pictorial representations portread darluniol pictorial sketch braslun darluniol pictorial sketches braslun darluniol pictorial space gofod darluniol pictorial spaces gofod darluniol pictorial view golwg darluniol pictorial views golwg darluniol pictorialism darluniadaeth pictorialisms darluniadaeth picture darlun picture frame ffrâm ddarlun picture frames ffrâm ddarlun picture plane plân darlun picture planes plân darlun picture rail rheilen bictiwr picture rails rheilen bictiwr picture varnish farnais darlun picture varnishs farnais darlun picture window ffenestr lydan picture windows ffenestr lydan pictures darlun picturesque darluniaidd pie chart siart cylch pie charts siart cylch pie graph graff olwyn (=wheel graph) pie graphs graff olwyn (=wheel graph) piece darn piece rate cyfradd yn ôl y gwaith (in economics) piece rates cyfradd yn ôl y gwaith (in economics) piece work tâl yn ôl y gwaith (remuneration) piece works tâl yn ôl y gwaith (remuneration) pieces darn pierce rhwyllo (in metalwork) pierce trywanu (=stab) pierced panel panel rhwyllog pierced panels panel rhwyllog pierced work rhwyllwaith pierced works rhwyllwaith piercer gwanydd piercers gwanydd piercing saw llif rwyllo piercing saws llif rwyllo pietism pietistiaeth pietisms pietistiaeth pietist pietist pietist pietistaidd pietists pietist piety duwioldeb piezo electric effect effaith piesodrydanol piezo electric effects effaith piesodrydanol pig iron haearn crai (ferrous metal) pig irons haearn crai (ferrous metal) pigment pigment pigmentation pigmentiad pigmentations pigmentiad pigments pigment pike picell pike dive deif blygu pike dives deif blygu pikeman picellwr pikemans picellwr pikes picell pilaster pilastr pilasters pilastr pile peil (of fabric) pile foundation sylfaen bileri pile foundations sylfaen bileri piles clwyf y marchogion piles peil (of fabric) pileus pilews pilgrim pererin pilgrimage pererindod pilgrimages pererindod pilgrims pererin pill pilsen pillage ysbeilio pillar piler pillar and stall mining gweithio talcennau pillar drill dril piler pillar drilling machine peiriant drilio piler pillar drilling machines peiriant drilio piler pillar drills dril piler pillar type machine peiriant pilerog pillar type machines peiriant pilerog pillaring pileru (in slate quarries) pillars piler pilling pellennu pillory rhigod pillow gobennydd pillow lava lafa clustog pillow lavas lafa clustog pillow structure adeiledd clustog pillow structures adeiledd clustog pillowcase cas gobennydd pillowcases cas gobennydd pillows gobennydd pills pilsen pilot cynnal peilot (a scheme etc) pilot peilot pilot drill dril arwain pilot drilling drilio arwain pilot drills dril arwain pilot hole twll arwain pilot holes twll arwain pilot project project peilot pilot projects project peilot pilot test prawf peilot pilot tests prawf peilot pimple ploryn pimples ploryn pin ebill (for tuning) pin pinio pin pìn pin and slot cynffon a bwlch pin and string method dull pìn a llinyn pin and string methods dull pìn a llinyn pin drill dril pìn pin drills dril pìn pin hammer morthwyl pìn pin hammers morthwyl pìn pin lock clo pìn pin locks clo pìn pin mark marc pìn pin marks marc pìn pin plate pinblat pin plates pinblat pin punch pwnsh pìn pin punches pwnsh pìn pin stitch pwyth pìn pin stitches pwyth pìn pin tuck twc pìn pin tucks twc pìn pin vice feis pìn pin vices feis pìn pin-jointed framework fframwaith uniad-pìn pin-jointed frameworks fframwaith uniad-pìn pin-pointed mechanism mecanwaith uniad-pìn pin-pointed mechanisms mecanwaith uniad-pìn pinafore dress ffrog biner pincers pinsiwrn pinch pinsiad pinch pinsio pinch pleat mân-blet pinch pleats mân-blet pinch pottery crochenwaith pinsiad pinches pinsiad pincushion pincas pincushions pincas pingo pingo pinhole twll pìn pinholes twll pìn pinion piniwn (=cog-wheel or spindle) pinions piniwn (=cog-wheel or spindle) pinking pincio pinking scissors siswrn pincio pinking shears gwellaif pincio pinna pinna pinnace pinnas pinnaces pinnas pinnas pinna pinnate drainage draeniad pluog pinnate drainages draeniad pluog pinned mortise and tenon joint uniad mortais a thyno niferus pinned mortise and tenon joints uniad mortais a thyno niferus pinning pinio (of file) pinocytosis pinocytosis pint peint pinto beans ffa pinto pints peint pioneer arloesi pioneer arloesol pioneer arloeswr pioneers arloeswr pipe canu pib (=play the pipe) pipe peipen (in plumbing etc) pipe peipio (in plumbing etc) pipe pib (in music etc) pipe pibell (in general) pipe bending machine peiriant plygu peipen pipe bending machines peiriant plygu peipen pipe bending wrench tyndro plygu peipen pipe bending wrenches tyndro plygu peipen pipe clamp clamp peipen pipe clamps clamp peipen pipe cleaner glanhawr pibell pipe cleaners glanhawr pibell pipe grips gafaelydd peipen pipe line lein bibell pipe lines lein bibell pipe organ organ bib pipe organs organ bib pipe tongs gefel beipen pipe vice feis beipen pipe vices feis beipen pipe wrench tyndro peipen pipe wrenches tyndro peipen piped buttonhole twll botwm wedi'i beipio piped buttonholes twll botwm wedi'i beipio piped light golau drwy beipen piped lights golau drwy beipen piped seam sêm wedi'i pheipio piped seams sêm wedi'i pheipio pipelining blaenbeipio piper peipell (machine attachment) pipers peipell (machine attachment) pipes peipen (in plumbing etc) pipes pib (in music etc) pipes pibell (in general) pipette pibed pipette pibedu pipettes pibed piping peipio (shrinkage) piping cord cortyn peipio piping cords cortyn peipio pipkrake nodwyddau iâ pippin pipin pippins pipin pique pique piques pique piracy afonladrad (=river capture) piracy lladrad (in general) piracy môr-ladrad (on sea) pirate môr-leidr pirate stream lleidr pirate streams lleidr pirates môr-leidr pistil pistil pistils pistil pistol grip gafael llawddryll (hacksaw frame) pistol grips gafael llawddryll (hacksaw frame) piston piston piston rings cylchau piston pistons piston pit mân-bant (on plant or animal body) pit pwll (=deep hole in ground) pit pwll neidio (in sport) pit dwelling annedd bant pit dwellings annedd bant pitch codiad to (of roof) pitch dringen (in mountaineering) pitch gogwydd (in geology) pitch gogwyddo (in geology) pitch llain (for playing cricket) pitch maes (=playing field) pitch pitsh (of ball) pitch pitsio (a ball) pitch pyg (=tar) pitch taro (a note) pitch traw (of sound) pitch angle ongl bitsh (plane) pitch angle pitsh (saw teeth) pitch angles ongl bitsh (plane) pitch angles pitsh (saw teeth) pitch block blocyn pyg pitch blocks blocyn pyg pitch circle diameter diamedr pitsh cylch (P.C.D.) pitch circle diameters diamedr pitsh cylch (P.C.D.) pitch of screw danheddiad sgriw pitch of the ball disgynfan y bêl pitched roof to ar ongl pitched roofs to ar ongl pitcher pitsiwr pitcher's plate plât y pitsiwr pitcher's plates plât y pitsiwr pitchers pitsiwr pitches codiad to (of roof) pitches dringen (in mountaineering) pitches gogwydd (in geology) pitches llain (for playing cricket) pitches maes (=playing field) pitches pitsh (of ball) pitches pyg (=tar) pitches traw (of sound) pitchstone pygfaen pitchstones pygfaen pith bywyn piths bywyn piton piton pitons piton pitprop postyn pwll pitprops postyn pwll pitted mân-bantiog pitting pyllu pituitary gland chwarren bitwidol pituitary glands chwarren bitwidol pivot colyn pivot colynnu (in general) pivot troi ar y nodwydd (on a needle) pivot element elfen golyn pivot elements elfen golyn pivot hinge colfach colyn pivot hinges colfach colyn pivot joint cymal cylchdroi (in anatomy) pivot joint uniad colyn (in woodwork) pivot joints cymal cylchdroi (in anatomy) pivot joints uniad colyn (in woodwork) pivot turn troad ar golyn pivot turns troad ar golyn pivotal colynnol pivoted ar golyn pivoted arm braich ar golyn pivoted arms braich ar golyn pivoted sash window ffenestr ar golyn dalennog pivoted sash windows ffenestr ar golyn dalennog pivots colyn pixel picsel pixel colour lliw picsel pixel colours lliw picsel pixel edit golygu picsel pixelation picseleiddio pixels picsel place gosod place lle place kick cic osod place kicks cic osod place mat mat bwrdd place mats mat bwrdd place of interest lle diddorol place of worship man addoli place value gwerth lle place values gwerth lle place-setting gosodiad bwrdd place-settings gosodiad bwrdd placebo plasebo placement lleoliad placement log log lleoliad placement logs log lleoliad placement officer swyddog lleoliadau placement officers swyddog lleoliadau placements lleoliad placenta brych placentas brych placer gold aur banc tywod placer golds aur banc tywod places lle placing gosodiad placings gosodiad placket placed plackets placed plagal cadence diweddeb amen plagal cadences diweddeb amen plagal mode modd deilliedig plagal modes modd deilliedig plagiarism llên-ladrad plagiarisms llên-ladrad plagioclimax plagioclimacs plagioclimaxes plagioclimacs plague pla plagues pla plaid plad plaids plad plain gwastadedd plain plaen plain butt ymyl blaen plain butts ymyl blaen plain centre canol plaen plain centres canol plaen plain cutter torrell blaen plain cutters torrell blaen plain drawstroke strôc dynnu plain drawstrokes strôc dynnu plain finish gorffeniad plaen plain finishs gorffeniad plaen plain flour blawd plaen plain flours blawd plaen plain material defnydd plaen plain materials defnydd plaen plain milling cutter melinwr plaen plain milling cutters melinwr plaen plain mitred joint uniad meitrog plaen plain mitred joints uniad meitrog plaen plain panel panel plaen plain panels panel plaen plain quartering llifio plaen chwarteru plain sawing llifio trwodd plain scale graddfa syml plain scales graddfa syml plain seam sêm agored plain seams sêm agored plain stitch pwyth plaen plain stitches pwyth plaen plain text testun plaen plain texts testun plaen plain tile teilsen blaen plain tiles teilsen blaen plain tract gwastatir afon plain tracts gwastatir afon plain washer wasier blaen plain washers wasier blaen plain weather-boarding byrddau hindraul cyffredin plain weave gwehyddiad plaen plain weaves gwehyddiad plaen plains gwastadedd plainsong plaengan plainsongs plaengan plaintiff achwynydd plaintiff pleintydd plaintiffs achwynydd plaintiffs pleintydd plait pleth plait plethu plaits pleth plan cynllun (=scheme) plan cynllunio plan environments cynllunio amgylcheddau plan view uwcholwg plan views uwcholwg planar planar planar engraving ysgythriad planar planar engravings ysgythriad planar planation gwastadiant planations gwastadiant plane plaen (of tool) plane plaenio (with tool) plane plân (geometrical) plane and solid geometry geometreg plân a solid plane figure ffigur plân plane figures ffigur plân plane geometry geometreg plân plane of reference plân cyfeirnod plane of symmetry plân cymesuredd plane picture darlun plân gwastad plane pictures darlun plân gwastad plane polarized light golau plân polar plane polarized lights golau plân polar plane polarized wave ton blân bolar plane polarized waves ton blân bolar plane solids solidau plân plane surface arwyneb plân plane surfaces arwyneb plân planed all round wedi'i blaenio i gyd (of wood) planed size maint wedi'i blaenio planed sizes maint wedi'i blaenio planer plaeniwr planers plaeniwr planes plaen (of tool) planes plân (geometrical) planet planed planets planed planing machine peiriant plaenio planing machines peiriant plaenio planishing planisio planishing hammer morthwyl planisio planishing hammers morthwyl planisio planisphere planisffer planispheres planisffer plank planc planks planc plankton plancton planktons plancton planned economy economi cynlluniedig planning cynllunio planning trend ffasiwn cynllunio planning trends ffasiwn cynllunio plans cynllun (=scheme) plant gwaith (=factory) plant peiriannau (=equipment) plant planhigol plant planhigyn (trees, flowers etc) plant association cydgymuned blanhigion plant associations cydgymuned blanhigion plant cell wall cellfur planhigion plant cell walls cellfur planhigion plant gum gwm planhigol plant gums gwm planhigol plant hormone hormon planhigol plant hormones hormon planhigol plant tissue meinwe planhigion plant tissue culture meithrin meinweoedd planhigol plant tissues meinwe planhigion plantain llyriad plantains llyriad plantarflexion gwadnblygiad plantarflexions gwadnblygiad plantation planhigfa (of plants) plantation trefedigaeth (of people) plantations planhigfa (of plants) plantations trefedigaeth (of people) planted bead glain gosod planted beads glain gosod planted moulding mowldin gosod planted mouldings mowldin gosod planted top top gosod (table) planted tops top gosod (table) plants gwaith (=factory) plants planhigyn (trees, flowers etc) plaque plac plaques plac plasma membrane pilen blasmaidd plasma membranes pilen blasmaidd plasmolyse plasmolysu plaster plastr plaster plastro plaster and bandage plastr a rhwymyn plaster bat bat plastr plaster bats bat plastr plaster cast cast plastr plaster casting castin plastr plaster castings castin plastr plaster casts cast plastr plaster figure ffigur plastr plaster figures ffigur plastr plaster head pen plastr plaster heads pen plastr plaster of Paris plastr Paris plasterboard bwrdd plastr plasterboards bwrdd plastr plasters plastr plastic plastig plastic art celfyddyd blastig plastic arts celfyddyd blastig plastic bead glain plastig plastic beads glain plastig plastic beaker bicer plastig plastic beakers bicer plastig plastic bending plygu plastig plastic carving cerfiad plastig (of object) plastic carving cerfio plastig (of action) plastic carvings cerfiad plastig (of object) plastic coating araen blastig plastic coatings araen blastig plastic colour lliw plastig plastic colours lliw plastig plastic container cynhwysydd plastig plastic containers cynhwysydd plastig plastic emulsion emwlsiwn plastig plastic emulsions emwlsiwn plastig plastic figure ffigur plastig plastic figures ffigur plastig plastic filler llenwad plastig plastic fillers llenwad plastig plastic fitting gosodydd plastig plastic fittings gosodydd plastig plastic foil ffoil plastig plastic foils ffoil plastig plastic hammer morthwyl plastig plastic hammers morthwyl plastig plastic heating gwresogi plastig plastic laminate laminiad plastig plastic laminates laminiad plastig plastic machining peiriannu plastig plastic mallet gordd blastig plastic mallets gordd blastig plastic material defnydd plastig plastic materials defnydd plastig plastic mould mowld plastig plastic moulds mowld plastig plastic racket raced blastig plastic rackets raced blastig plastic ruler riwl blastig plastic rulers riwl blastig plastic saucer soser blastig plastic saucers soser blastig plastic sheeting llen blastig plastic sheetings llen blastig plastic spoon llwy blastig plastic spoons llwy blastig plastic starch startsh plastig plastic starches startsh plastig plastic surgery llawfeddygaeth blastig plastic track trac plastig plastic tracks trac plastig plastic tube tiwb plastig plastic tubes tiwb plastig plastic webbing webin plastig plastic webbings webin plastig plasticine plastisin plasticines plastisin plasticity plastigrwydd plasticizer plastigydd plasticizers plastigydd plastics plastig plastid plastid plastids plastid plate platio plate plât plate glass platwydr plate tectonic theory damcaniaeth tectoneg platiau plate tectonics tectoneg platiau plateau llwyfandir plateau block bloclwyfandir plateau blocks bloclwyfandir plateau phase gwedd lwyfandir plateau phases gwedd lwyfandir plateaus llwyfandir platelet platen (blood) platelets platen (blood) platen platen platens platen plates plât platform llwyfan platforms llwyfan plating platio platinize platinio platinum platinwm (Pt) platinums platinwm (Pt) platoon platŵn platoons platŵn platykurtic platycwrtig play canu (an instrument) play chwarae (=recreation) play chwarae (a piece) play chwarae (of games) play drama (=drama) play a simple ostinato chwarae ostinato syml play activities gweithgareddau chwarae play area lle chwarae play areas lle chwarae play by ear chwarae yn ôl y glust play centre canolfan chwarae play centres canolfan chwarae play ethos ethos chwarae play fighting chwarae ymladd play leader arweinydd chwarae play leaders arweinydd chwarae play school cylch chwarae play schools cylch chwarae play stool stôl fach play stools stôl fach play tennis chwarae tennis play therapist therapydd chwarae play therapists therapydd chwarae play therapy therapi chwarae play time amser chwarae play times amser chwarae play tutoring tiwtora chwarae play unit uned chwarae play units uned chwarae play-back trosglwyddo play-pen corlan chwarae play-pens corlan chwarae play-scheme cynllun chwarae play-schemes cynllun chwarae playa playa playas playa playboard bwrdd chwarae (puppet stage) playboards bwrdd chwarae (puppet stage) playcare gofal-chwarae player chwaraewr players chwaraewr playground buarth chwarae (of school) playground lle chwarae (in general) playgrounds buarth chwarae (of school) playgrounds lle chwarae (in general) playgroup cylch chwarae playgroup worker gweithiwr cylch chwarae playgroup workers gweithiwr cylch chwarae playgroups cylch chwarae playwork gwaith-chwarae playworks gwaith-chwarae plea ple plead pledio pleader plediwr pleaders plediwr pleas ple pleas of the Crown pledion y Goron pleasing dymunol pleasing appearance ymddangosiad dymunol pleasing appearances ymddangosiad dymunol pleat plet pleated edge ymyl bletiog pleated edges ymyl bletiog pleated skirt sgert bletiog pleated skirts sgert bletiog pleating pletio pleats plet plebeian gwerinol plebeian gwerinwr Rhufeinig plebeians gwerinwr Rhufeinig plebiscite pleidlais gwlad plebiscites pleidlais gwlad plectrum plectrwm plectrums plectrwm pledge gwystl (given as security) pledges gwystl (given as security) pleion pleion pleions pleion pleiotropy pleiotropedd plenary llawn plenary session sesiwn lawn plenary sessions sesiwn lawn plenipotentiary plenipotensiwr pleura eisbilen pleural eisbilennol pleural cavity ceudod eisbilennol pleural fluid hylif eisbilennol pleural fluids hylif eisbilennol pleural membrane pilen eisbilennol yr ysgyfaint pleural membranes pilen eisbilennol yr ysgyfaint pleuras eisbilen pliability hyblygedd pliable hyblyg pliancy ystwythder pliant ystwyth plication plygiant plications plygiant pliers gefelen pliers-type saw set gosodydd llif teip gefelen pliers-type saw sets gosodydd llif teip gefelen plinth plinth plinth block bloc plinth plinth blocks bloc plinth plinths plinth plot cynllwyn (=conspiracy) plot cynllwynio (=conspiracy) plot llain (of land) plot plot (of story etc) plot plotio (a point) plots cynllwyn (=conspiracy) plots llain (of land) plots plot (of story etc) plotter plotydd plotters plotydd plough plaen llyfr-rwymwr (bookbinder's) plough plane plaen rhigoli plough planes plaen rhigoli ploughbote aradfudd ploughbotes aradfudd ploughing rhigoli (in technology) ploughs plaen llyfr-rwymwr (bookbinder's) plug hys-bys plug plwg plug plygio plug compatible plwg-gytûn plug gauge medrydd plwg plug gauges medrydd plwg plug tap tap plwg plug taps tap plwg plug-in unit uned blygio plug-in units uned blygio plugging chisel cŷn plygio plugging chisels cŷn plygio plugs hys-bys plugs plwg plumb plwm plumb line llinyn plwm plumb lines llinyn plwm plumbago plwmbago (graphite + clay) plumber plymwr plumber's solder sodr plymwr plumber's solders sodr plymwr plumbers plymwr plumule cyneginyn (in botany) plumules cyneginyn (in botany) plunge plymiad plunge plymio plunge pool plymbwll plunge pools plymbwll plunger plymiwr plungers plymiwr plunges plymiad plural society cymdeithas luosryw pluralism amlblwyfaeth (=holding more than one benefice) pluralism plwraliaeth (of cultural diversity) pluralisms amlblwyfaeth (=holding more than one benefice) pluralisms plwraliaeth (of cultural diversity) pluralist amlblwyfydd pluralistic amlblwyfol pluralists amlblwyfydd plurality amlblwyfaeth plus plws plutocracy pliwtocratiaeth plutocrat pliwtocrat plutocrats pliwtocrat plutonic rocks creigiau plwtonig plutonium plwtoniwm (Pu) plutoniums plwtoniwm (Pu) pluvial glawog ply haen (=layer) plywood pren haenog plywood panel panel pren haenog plywood panels panel pren haenog plywoods pren haenog pneumatic niwmatig pneumatic system system niwmatig pneumatic systems system niwmatig pneumatic tools offer niwmatig pneumatics niwmateg pneumonia niwmonia pneumonias niwmonia pneumotaxis niwmotacsis poached egg wy wedi'i botsio poached eggs wy wedi'i botsio poacher potsiwr poachers potsiwr pocket poced pocket pocedu pocket beach cildraeth (bay head beach) pocket beaches cildraeth (bay head beach) pocket borough bwrdeistref boced pocket boroughs bwrdeistref boced pocket money arian poced pocket screwing sgriwio poced pocketbook pocediadur (of portable computer) pocketbooks pocediadur (of portable computer) pockets poced pod coden podsol podsol podsolic podsolig podsols podsol poetic tradition traddodiad barddol poetic traditions traddodiad barddol poetry barddoniaeth poikilothermic poicilothermig point blaen (of bow) point pwynt (in general) point pwyntio point trwyn (topographic) point angle ongl bwynt (drill part) point angles ongl bwynt (drill part) point attack ymosod â'r pwynt point charge gwefr bwynt point charges gwefr bwynt point circle cylch pwynt point circles cylch pwynt point collocation cydleoliad pwyntiol point collocations cydleoliad pwyntiol point graph graff pwyntiau point graphs graff pwyntiau point mass màs pwynt point of articulation pwynt cymal point of contact pwynt cyffwrdd point of delay pwynt oedi point of detail pwynt manylyn point of infinity pwynt anfeidredd point of inflection pwynt ffurfdro point of insertion mewnfan point of intersection pwynt croestoriad point of origin tarddle (muscle) point of tangency pwynt tangiadaeth point of the jaw pwynt yr ên point of view safbwynt point pattern analysis dadansoddi patrwm pwyntiau point sample samplu pwynt point size maint pwynt point sizes maint pwynt point source tarddle pwynt point sources tarddle pwynt point symmetry cymesuredd pwynt point-of-sale item eitem pwynt talu point-of-sale items eitem pwynt talu point-of-sale terminal terfynell pwynt talu (POS) point-of-sale terminals terfynell pwynt talu (POS) pointed pigfain pointed arch bwa pigfain pointed arches bwa pigfain pointed collar coler pig pointed collars coler pig pointed scissors siswrn pigfain pointer pwyntydd pointers pwyntydd points blaen (of bow) points pwynt (in general) points trwyn (topographic) points of the compass pwyntiau'r cwmpawd poise cydbwysedd (=balance) poise osgo (=carriage of body) poises cydbwysedd (=balance) poises osgo (=carriage of body) poison gwenwyn poison gwenwyno poisoning gwenwyniad poisonings gwenwyniad poisonous gases nwyon gwenwynig poisons gwenwyn poker pocer poker work gwaith pocer poker works gwaith pocer pokers pocer polar pegynlin polar pegynol (geographic) polar polar (of magnet, electricity) polar axis echelin begynol polar body corffyn pegynol polar covalent cofalent polar polar covalents cofalent polar polar front ffrynt pegynol polar fronts ffrynt pegynol polar projection tafluniad pegynol polar projections tafluniad pegynol polar solvent hydoddydd polar polar solvents hydoddydd polar polar-continental pegynol-gyfandirol polar-maritime pegynol-arforol polarimeter polarimedr polarimeters polarimedr polarimetry polarimedreg polarity polaredd polarization polareiddiad polarizations polareiddiad polarize polareiddio polarized polar polarized light golau polar polarized lights golau polar polarizer polarydd polarizers polarydd polars pegynlin polder polder polders polder pole pegwn (geographic) pole polyn (=long, slender piece of wood, metal etc) pole pôl (of magnet) pole lathe turn polyn pole lathes turn polyn pole of development pegwn datblygiadol pole piece darn pôl pole pieces darn pôl pole star seren y gogledd pole stars seren y gogledd pole strength poledd pole strengths poledd pole vault naid bolyn pole vaults naid bolyn poles pegwn (geographic) poles polyn (=long, slender piece of wood, metal etc) poles pôl (of magnet) poleward tua'r pegwn police heddlu police protection amddiffyniad heddlu police protections amddiffyniad heddlu police state gwladwriaeth heddlu police states gwladwriaeth heddlu police station gorsaf heddlu police stations gorsaf heddlu polices heddlu policy polisi policy framework fframwaith polisi policy frameworks fframwaith polisi polio polio polish caboli (style, performance etc) polish llathredd (=shine) polish llathru polish llathrydd (material) polished caboledig (style, performance etc) polished llathredig (surface) polished stone axe bwyell garreg wedi'i llathru polished stone axes bwyell garreg wedi'i llathru polisher llathrydd (equipment) polishers llathrydd (equipment) polishing buff bwff llathru polishing buffs bwff llathru polishing cloth cadach llathru polishing cloths cadach llathru polishing compound cyfansoddyn llathru polishing compounds cyfansoddyn llathru polishing head pen llathru polishing heads pen llathru polishing mop mop llathru polishing mops mop llathru polishing pad pad llathru polishing pads pad llathru polishing process proses lathru polishing rag clwtyn llathru polishing rags clwtyn llathru polishing wheel olwyn lathru polishing wheels olwyn lathru polishs llathredd (=shine) polishs llathrydd (material) political gwleidyddol political and electoral reform diwygio gwleidyddol ac etholiadol political and religious radicalism radicaliaeth wleidyddol a chrefyddol political and religious radicalisms radicaliaeth wleidyddol a chrefyddol political asylum lloches wleidyddol political asylums lloches wleidyddol political balance cydbwysedd gwleidyddol political balances cydbwysedd gwleidyddol political economy economeg wleidyddol political history hanes gwleidyddol political party plaid wleidyddol political structure strwythur gwleidyddol political structures strwythur gwleidyddol political thought syniadaeth wleidyddol political thoughts syniadaeth wleidyddol political unification uno gwleidyddol politics gwleidyddiaeth politics and society gwleidyddiaeth a chymdeithas polka polca polka step step bolca polka steps step bolca polkas polca poll tax treth y pen poll taxes treth y pen pollack morleisiad pollacks morleisiad pollard tocbren pollards tocbren pollen paill pollen analysis dadansoddi paill pollens paill pollinate peillio pollutant llygrydd pollutants llygrydd pollute llygru pollution llygredd pollutions llygredd polo neck gwddf polo polo necks gwddf polo polonaise polonaise polonaises polonaise polonium poloniwm (Po) poloniums poloniwm (Po) polyandry amlwriaeth polycarbonate polycarbonad polycarbonates polycarbonad polyclens polyclens polycormic amlgormig polyculture amlgnwd polyculture amlgnydio polycultures amlgnwd polycycle amlgylchred polycycles amlgylchred polycyclic amlgylchredol polyester polyester polyester lacquer lacr polyester polyester lacquers lacr polyester polyester resin resin polyester polyester resins resin polyester polyesters polyester polyesters polyesterau (thermosetting plastics) polyether foam ewyn polyether polyether foams ewyn polyether polyethylene polyethylen polyethylenes polyethylen polyfilla polyffila polyfillas polyffila polyfluorocarbon polyfflworocarbon polyfluorocarbons polyfflworocarbon polygamy amlweddogrwydd (in zoology) polyglot amlieithog polyglot amlieithydd polyglots amlieithydd polygon polygon polygon of forces polygon grymoedd polygon shape siâp polygon polygon shapes siâp polygon polygons polygon polyhedral polyhedrol polyhedron polyhedron polyhedrons polyhedron polymer polymer polymer emulsion emwlsiwn polymer polymer emulsions emwlsiwn polymer polymerization polymeriad polymerizations polymeriad polymerize polymeru polymers polymer polynomial polynomaidd polynomial polynomial polynomial equation hafaliad polynomaidd polynomial equations hafaliad polynomaidd polynomial function ffwythiant polynomaidd polynomial functions ffwythiant polynomaidd polynomials polynomial polyomino polyomino polypeptide polypeptid polypeptides polypeptid polyphosphate polyffosffad polyphosphates polyffosffad polypropylene polypropylen polypropylenes polypropylen polysaccharide polysacarid polysaccharides polysacarid polysemic amlystyr polystyrene polystyren polystyrene casting castio polystyren polystyrenes polystyren polytheism amldduwiaeth polytheisms amldduwiaeth polythene polythen polythene bag bag polythen polythene bags bag polythen polythenes polythen polytonal amlgywair polytonality amlgyweiredd polytope polytop polytopes polytop polyunsaturated amlannirlawn polyunsaturated fatty acid asid brasterog amlannirlawn polyunsaturated fatty acids asid brasterog amlannirlawn polyurethane polywrethan polyurethane finish gorffeniad polywrethan polyurethane finishs gorffeniad polywrethan polyurethane varnish farnais polywrethan polyurethane varnishs farnais polywrethan polyurethanes polywrethan polyvinyl acetate polyfinyl asetad polyvinyl acetate glue glud polyfinyl asetad polyvinyl acetate glues glud polyfinyl asetad polyvinyl acetates polyfinyl asetad polyvinyl chloride polyfinyl clorid polyvinyl chlorides polyfinyl clorid polyvinylidene polyfinyliden polyvinylidenes polyfinyliden pomarine skua sgiwen gynffondro pomarine skuas sgiwen gynffondro pommel cnap pommels cnap pompom pompom pompoms pompom ponderous trwm ponor llyncdwll (=swallow hole) ponors llyncdwll (=swallow hole) pontage pontreth pontages pontreth ponticello ponticello pontiff pontiff pontiffs pontiff pontifical llyfr esgobol pontificals llyfr esgobol pontificate teyrnasiad pab pontificates teyrnasiad pab pony trekker merlotwr pony trekkers merlotwr pony trekking merlota pony-hair brush brwsh blew merlen pony-hair brushs brwsh blew merlen pool cronfa (=fund) pool pwll (for swimming) pool resources cyfuno adnoddau pools cronfa (=fund) pools pwll (for swimming) poor tlawd poor law cyfraith y tlodion poor laws cyfraith y tlodion poor quality housing tai o ansawdd gwael poor relief cymorth y tlodion poor reliefs cymorth y tlodion pop pop pop popio pop art celfyddyd bop pop arts celfyddyd bop pop rivet rhybed pop pop rivets rhybed pop pop song cân boblogaidd pop songs cân boblogaidd pop-up menu naidlen pop-up menus naidlen pope pab popes pab popish pabaidd poplin poplin poplins poplin popping crease cris batio popping creases cris batio poppy oil olew pabi poppy oils olew pabi popular poblogaidd popular front ffrynt y bobl popular fronts ffrynt y bobl popular protest protestiadau'r bobl popular sovereignty sofraniaeth y bobl popularity and appeal poblogrwydd ac apêl populated country gwlad boblog population poblogaeth population cycle cylchred poblogaeth population cycles cylchred poblogaeth population explosion ffrwydrad poblogaeth population explosions ffrwydrad poblogaeth population potential potensial poblogaeth population potentials potensial poblogaeth population regulation rheoli poblogaeth population variance amrywiant poblogaeth population variances amrywiant poblogaeth populations poblogaeth populism poblyddiaeth populisms poblyddiaeth populist poblyddwr populists poblyddwr porbeagle shark corgi môr porbeagle sharks corgi môr porcelain porslen porcelains porslen porch porth porches porth pore mandwll pores mandwll porosity mandylledd porous mandyllog porous ground grwnd mandyllog (in art) porous grounds grwnd mandyllog (in art) porous ring cylch hydraidd porous rings cylch hydraidd porous surface arwyneb mandyllog porous surfaces arwyneb mandyllog porphyritic porffyritig porphyry porffyri porpoise llamhidydd porpoises llamhidydd port port (side) port porth port of call porthladd galw port tack tacio port port-reeve porthfaer port-reeves porthfaer portability cludadwyedd portable cludadwy portable apparatus offer cludol portable computer cyfrifiadur cludadwy portable computers cyfrifiadur cludadwy portable drill dril cludadwy portable drills dril cludadwy portable easel îsl cludadwy portable easels îsl cludadwy portable electric drill dril trydan cludadwy portable electric drills dril trydan cludadwy portable forge gefail gludadwy portable forges gefail gludadwy portable grinder llifanydd cludadwy portable grinders llifanydd cludadwy portable plane plaen cludadwy portable planer plaeniwr cludadwy portable planers plaeniwr cludadwy portable planes plaen cludadwy portable power tools offer pŵer cludadwy portable sander sandiwr cludadwy portable sanders sandiwr cludadwy portable screen sgrin gludadwy portable screens sgrin gludadwy portable vice feis gludadwy portable vices feis gludadwy portal dolmen dolmen porth portal dolmens dolmen porth portal framed building adeilad ffrâm bortal portal framed buildings adeilad ffrâm bortal portal vein gwythïen bortal portal veins gwythïen bortal portamento portamento portative organ organ gludadwy portative organs organ gludadwy portcullis porthcwlis porter porthor portering porthora porters porthor portfolio portffolio porting cario (=carrying the canoe) porting trosglwyddo portion cyfran portionary church eglwys gyd-gyfranedig portionary churches eglwys gyd-gyfranedig portions cyfran portrait portread portrait painter paentiwr portreadau portrait painters paentiwr portreadau portrait painting paentiad portreadol (of painted picture) portrait painting peintio portreadol (of process or art) portrait study astudiaeth bortreadol portraits portread portray portreadu ports port (side) ports porth pose sefyll mewn ystum pose ystum posed model model mewn ystum arbennig posed models model mewn ystum arbennig poses ystum position cymryd safle (oneself) position safle (of place) position sefyllfa (=situation) position of the feet safle'r traed position of the sun safle'r haul position vector fector safle position vectors fector safle positions safle (of place) positions sefyllfa (=situation) positive cadarnhaol (in general) positive positif (in mathematics, science) positive aspect agwedd gadarnhaol positive aspects agwedd gadarnhaol positive attitude agwedd gadarnhaol positive attitudes agwedd gadarnhaol positive charge gwefr bositif positive charges gwefr bositif positive constant cysonyn positif positive constants cysonyn positif positive discrimination gwahaniaethu'n gadarnhaol positive drive gyriad positif positive drives gyriad positif positive externalities allanoldeb positif positive feedback adborth positif (of signal) positive feedback ymateb cadarnhaol (from people) positive feedbacks adborth positif (of signal) positive feedbacks ymateb cadarnhaol (from people) positive image delwedd bositif (in photography etc) positive image delwedd gadarnhaol (of people etc) positive images delwedd bositif (in photography etc) positive images delwedd gadarnhaol (of people etc) positive rake gwyredd positif positive rakes gwyredd positif positive skew sgiw bositif positive skews sgiw bositif positive variance amrywiant cadarnhaol positive variances amrywiant cadarnhaol positive whole number rhif cyfan positif positive whole numbers rhif cyfan positif positively bounded below yn ffinedig bositif oddi tanodd positron positron positrons positron possession meddiant possession of the ball meddiant o'r bêl possessions meddiant posset llaeth baban possets llaeth baban possibilism posibiliaeth possibilisms posibiliaeth possibilist posibiliedydd possibilists posibiliedydd possible impact effaith bosibl possible impacts effaith bosibl post postyn post glacial olrewlifol post impressionism ôl-argraffiadaeth post impressionisms ôl-argraffiadaeth post office swyddfa'r post post offices swyddfa'r post post synaptic membrane pilen ôl-synaptig post synaptic membranes pilen ôl-synaptig post-anaesthetic recovery adfer wedi'r anaesthetig post-dissolution wedi'r diddymiad post-mortem post-mortem post-mortems post-mortem post-multiply ôl-luosi post-natal ôl-enedigol post-natal care gofal ôl-eni post-natal cares gofal ôl-eni post-natal clinic clinig ôl-eni post-natal clinics clinig ôl-eni post-operative care gofal wedi'r llawdriniaeth post-operative cares gofal wedi'r llawdriniaeth postage stamp stamp post postage stamps stamp post postal post postal order archeb bost postal orders archeb bost postal services gwasanaethau post postcard cerdyn post postcards cerdyn post poster poster poster colour lliw posteri poster colours lliw posteri poster paint paent posteri poster paints paent posteri poster pen pen posteri poster pens pen posteri poster-brush brwsh poster poster-brushs brwsh poster posterior ôl posterior probability ôl debygolrwydd posters poster postfix olddodi postfix olddodiad postfixes olddodiad postlude postliwd postludes postliwd posts postyn postulate cynosod postulation cynosodiad postulations cynosodiad postural sense synnwyr o osgo postural senses synnwyr o osgo posture ymddaliad (in gymnastics) postures ymddaliad (in gymnastics) pot llestr pot life oes defnydd pot lifes oes defnydd potassium potasiwm (K) potassium iodide potasiwm iodid potassium iodides potasiwm iodid potassium nitrate potasiwm nitrad potassium nitrates potasiwm nitrad potassiums potasiwm (K) potato blight malltod tatws potato blights malltod tatws potato cut torlun taten potato cuts torlun taten potato printing printio â thaten potency nerth potential potensial potential customer darpar gwsmer potential customers darpar gwsmer potential difference gwahaniaeth potensial potential differences gwahaniaeth potensial potential divider rhannwr potensial potential dividers rhannwr potensial potential energy egni potensial potential growth twf posibl potential growths twf posibl potential hazard perygl posibl potential hazards perygl posibl potential market marchnad botensial potential markets marchnad botensial potentials potensial potentiometer potensiomedr potentiometers potensiomedr pothole ceubwll potholes ceubwll potted sports mabolgampau bach potter crochenydd potter's apron ffedog crochenydd potter's aprons ffedog crochenydd potter's clay clai crochenydd potter's wheel olwyn crochenydd potter's wheels olwyn crochenydd potters crochenydd pottery crochendy (workshop) pottery crochenwaith (object) pottery glaze gwydredd crochenwaith pottery glazes gwydredd crochenwaith potty training hyfforddiant toiled potty trainings hyfforddiant toiled poultice powltis poultices powltis poultry dofednod pounce panlwch (=powder) pounce panlychu (=powder) pounces panlwch (=powder) pound punt (money) pound pwys (weight) pound key bysell punt pounds punt (money) pounds pwys (weight) pour arllwys pouring basin basn arllwys pouring basins basn arllwys pouring batter cytew tenau pouring batters cytew tenau pouring gate porthell arllwys pouring gates porthell arllwys pouring method dull arllwys pouring methods dull arllwys poussette poussette poussettes poussette poverty tlodi powder powdr powder colour powdrliw powder colours powdrliw powder form ffurf bowdr powder forms ffurf bowdr powder glaze gwydredd powdr powder glazes gwydredd powdr powder pigment pigment powdr powder pigments pigment powdr powdered clay clai powdr powdered enamel enamel powdrog powdered enamels enamel powdrog powdered glue glud powdr powdered glues glud powdr powders powdr powdery powdrog power gallu (of capability) power nerth (=strength) power pŵer (in physics) power amp mwyhadur pŵer power amps mwyhadur pŵer power drive gyriad pŵer power drives gyriad pŵer power factor ffactor pŵer power factors ffactor pŵer power function ffwythiant pŵer power functions ffwythiant pŵer power hacksaw haclif bŵer power hacksaws haclif bŵer power jig saw herclif bŵer power jig saws herclif bŵer power loom gwŷdd peiriannol power looms gwŷdd peiriannol power pack pecyn pŵer power packs pecyn pŵer power plane plaen pŵer power planes plaen pŵer power point soced trydan power points soced trydan power politics gwleidyddiaeth grym power sander sandiwr pŵer power sanders sandiwr pŵer power station gorsaf drydan power stations gorsaf drydan power supply cyflenwad pŵer power tool erfyn pŵer power tools erfyn pŵer powerful grymus powerful serve serfio grymus powers gallu (of capability) powers nerth (=strength) powers pŵer (in physics) powers of 10 pwerau o 10 pox brech practical ymarferol practical activity gweithgaredd ymarferol practical approach agwedd ymarferol practical approaches agwedd ymarferol practical ethics moeseg ymarferol practical test prawf ymarferol practical tests prawf ymarferol practical work gwaith ymarferol practical works gwaith ymarferol practice arfer (=habit) practice ymarfer (=exercise) practice enamel enamel ymarfer practice enamels enamel ymarfer practice nurse nyrs practis practice nurses nyrs practis practice period cyfnod ymarfer practice periods cyfnod ymarfer practices arfer (=habit) practices ymarfer (=exercise) practise ymarfer practitioner ymarferwr practitioners ymarferwr pragmatism pragmatiaeth pragmatisms pragmatiaeth pragmatist pragmatydd pragmatists pragmatydd prairie paith prairie soils peithbriddoedd prairies paith pram pram pram hood cwfl pram pram hoods cwfl pram prams pram praseodymium praseodymiwm (Pr) praseodymiums praseodymiwm (Pr) pratitya-samutpada pratitya-samutpada pratitya-samutpadas pratitya-samutpada pray gweddïo prayer gweddi prayers gweddi pre-Cambrian cyn-Gambriaidd pre-amp rhagfwyhadur pre-amps rhagfwyhadur pre-budget statement datganiad cyn y gyllideb pre-budget statements datganiad cyn y gyllideb pre-conceptual thought meddwl cyn-gysyniadol pre-conceptual thoughts meddwl cyn-gysyniadol pre-eclampsia cyneclampsia pre-eclampsias cyneclampsia pre-emptive strike rhagymosodiad pre-emptive strikes rhagymosodiad pre-existing valley dyffryn cynfodol pre-glacial cynrewlifol pre-ignition cyn-daniad pre-ignitions cyn-daniad pre-mix blaen-gymysgiad pre-mixes blaen-gymysgiad pre-multiply blaen-luosi pre-prepare paratoi ymlaen llaw pre-prepared a baratowyd ymlaen llaw pre-shrink rhagbannu pre-shrunk rhagbanedig (finish) pre-test cyn-brawf pre-test cynbrofi pre-tests cyn-brawf pre-trial cyndreialu pre-wash cynolchi preach pregethu preacher pregethwr preachers pregethwr preamble rhaglith preambles rhaglith preamplifier rheolydd ton prebend prebend prebendary prebendari prebends prebend precaution rhagofal precautions rhagofal precedence blaenoriaeth precedences blaenoriaeth precedent cynsail precedents cynsail preceptor preceptor preceptors preceptor preceptorship preceptoriaeth preceptorships preceptoriaeth precess presesu precession presesiad precession of the equinoxes blaenoriad y cyhydnosau precessions presesiad precinct cyffin precincts cyffin precipice dibyn precipices dibyn precipitate gwaddod (=sediment) precipitates gwaddod (=sediment) precipitation dyddodiad (of insoluble compound) precipitation dyodiad (of rain, snow or hail) precipitations dyddodiad (of insoluble compound) precipitations dyodiad (of rain, snow or hail) precise trachywir (in science) precision trachywiredd (of instruments etc) precision instruments offer trachywir precision measuring tool erfyn mesur trachywir precision measuring tools erfyn mesur trachywir precision trimmer trimiwr trachywir precision trimmers trimiwr trachywir precisions trachywiredd (of instruments etc) precocious rhagaeddfed (of fruit, flower etc) precondition rhag-amod preconditions rhag-amod predation ysglyfaethu predator ysglyfaethwr predators ysglyfaethwr predatory pricing prisio rheibus predecessor rhagflaenydd predecessors rhagflaenydd predestinarian rhagordeiniadol predestinarianism rhagordeiniadaeth predestinarianisms rhagordeiniadaeth predestination rhagordeiniad predestinations rhagordeiniad predict rhagfynegi (in science) predict rhagweld (in non-technical usage) predicting rhagfynegi prediction rhagfynegiad predictions rhagfynegiad predisposing factors ffactor rhagdueddu predisposition rhagdueddiad predispositions rhagdueddiad predominant prif predominate rhagori (=excel) prefabricate rhagffurfio (preform) prefabricated house tŷ parod prefabricated houses tŷ parod prefect rhaglaw (in French administration) prefects rhaglaw (in French administration) preference blaenoriaeth preference dewis preferences blaenoriaeth preferences dewis preferential discharge dadwefru blaenoriaethol preferential tariff toll fantais preferential tariffs toll fantais preferment dyrchafiad preferments dyrchafiad preferred reading dehongliad dewisol (of audience response) preferred readings dehongliad dewisol (of audience response) prefix rhagddodi prefix rhagddodiad prefixes rhagddodiad preform rhagffurfio pregnancy beichiogrwydd pregnant beichiog preheat rhagboethi prehistoric cynhanes prehistoric trackway llwybr cynhanes prehistory cynhanes prejudice rhagfarn prejudices rhagfarn prelate prelad prelates prelad preliminary rhagarweiniol preliminary coat cot gyntaf preliminary coats cot gyntaf preliminary drawing lluniad rhagarweiniol preliminary drawings lluniad rhagarweiniol preliminary sketch braslun rhagarweiniol preliminary sketches braslun rhagarweiniol preliminary test rhagbrawf preliminary tests rhagbrawf prelude preliwd preludes preliwd premature cynamserol premedication rhagfoddion premedications rhagfoddion premenstrual tension tyndra cyn mislif premenstrual tensions tyndra cyn mislif premises adeiladau premium premiwm premium price pris premiwm premium prices pris premiwm premiums premiwm premolar gogilddant premolars gogilddant prenatal cyn-geni prenatal clinic clinig cyn geni prenatal clinics clinig cyn geni prenursing course cwrs cyn-nyrsio prenursing courses cwrs cyn-nyrsio preoperative care gofal cyn llawdriniaeth preoperative cares gofal cyn llawdriniaeth prepack blaenbacio prepacked food bwyd wedi'i bacio'n barod prepacked foods bwyd wedi'i bacio'n barod preparation paratoad preparation of a discord paratoi anghytsain preparations paratoad preparatory paratoadol preparatory beat blaenguriad preparatory beats blaenguriad preparatory work gwaith paratoadol preparatory works gwaith paratoadol prepare paratoi prepared piano piano paratoëdig prepared slide sleid wedi'i pharatoi prepared slides sleid wedi'i pharatoi preparing children for hospital paratoi plant i'r ysbyty prepay rhagdalu prepayment meter mesurydd rhagdal prepayment meters mesurydd rhagdal preprinted paper papur cynargraffedig preprinted papers papur cynargraffedig preproduction rhag-gynhyrchu prerecorded tape tâp parod prerecorded tapes tâp parod prerogative uchelfraint prerogative uchelfreiniol prerogatives uchelfraint presbyter presbyter presbyters presbyter presbytery presbytri preschool dan oed ysgol preschool child plentyn dan oed ysgol preschool childs plentyn dan oed ysgol prescribe rhagnodi (=impose authoritatively) prescribed limits cyfyngiadau penodedig prescription presgripsiwn prescription charge tâl presgripsiwn prescription charges tâl presgripsiwn prescriptions presgripsiwn prescriptive rhagnodol preselective rhagddetholiadol presence presenoldeb presences presenoldeb present the worship cyflwyno'r addoliad present worth gwerth presennol present worths gwerth presennol presentation cyflwyniad presentation mode modd cyflwyno presentation modes modd cyflwyno presentation style arddull cyflwyno presentation styles arddull cyflwyno presentation technique techneg gyflwyno presentation techniques techneg gyflwyno presentations cyflwyniad presenting information cyflwyno gwybodaeth preservative cadwolyn (=preserving substance) preservative cyffeithydd (of foodstuffs) preservatives cadwolyn (=preserving substance) preservatives cyffeithydd (of foodstuffs) preserve cadw preset rhagosod presidency arlywyddiaeth (of state) presidency llywyddiaeth (of society etc) president arlywydd (of state) president llywydd (of society etc) presidents arlywydd (of state) presidents llywydd (of society etc) presidium presidiwm presidiums presidiwm press gorfodi (=force) press gwasg (for printing, journalists) press gwasgu (=squeeze) press pwyso (=apply pressure) press a key pwyso bysell press cloth lliain presio press clothes presio dillad press cloths lliain presio press conference cynhadledd i'r wasg press conferences cynhadledd i'r wasg press fit gwasgffit press fits gwasgffit press gang près, y press release datganiad i'r wasg press releases datganiad i'r wasg press stud styden wasg press stud tool erfyn styden wasg press stud tools erfyn styden wasg press studs styden wasg press-up byrfraich press-ups byrfraich pressed gwasgedig pressed clay clai gwasgedig pressed hinge colfach gwasgedig pressed hinges colfach gwasgedig presser foot gwasgell (of machine part) presser foots gwasgell (of machine part) presser lever lifer gwasgell (of machine part) presser levers lifer gwasgell (of machine part) pressing cloth lliain presio pressing cloths lliain presio pressing pad pad presio pressing pads pad presio pressing roller rholer presio pressing rollers rholer presio pressure gwasgedd (in physics etc) pressure pwysau (of work etc) pressure area man gwasgu pressure areas man gwasgu pressure belt belt wasgedd pressure belts belt wasgedd pressure block bloc gwasgu pressure blocks bloc gwasgu pressure cooker sosban frys pressure cookers sosban frys pressure die casting deigastio gwasgol pressure forming ffurfio dan wasgedd pressure gauge medrydd gwasgedd pressure gauges medrydd gwasgedd pressure gradient graddiant gwasgedd pressure gradients graddiant gwasgedd pressure group carfan bwyso pressure groups carfan bwyso pressure level lefel gwasgedd pressure levels lefel gwasgedd pressure point gwasgbwynt pressure points gwasgbwynt pressure sore dolur gwasgu pressure sores dolur gwasgu pressure tendency tueddiad gwasgedd pressure valve falf gwasgedd pressure valves falf gwasgedd pressures gwasgedd (in physics etc) pressurize gwasgeddu pressurized gwasgeddedig prestige bri prestige industries diwydiannau bri prestige myth myth bri prestige myths myth bri prestiges bri presumption rhagdybiaeth presumptions rhagdybiaeth presynaptic rhagsynaptig pretend play chwarae dychmygu pretender ymhonnwr (to the throne) pretenders ymhonnwr (to the throne) prevailing wind prifwynt prevailing winds prifwynt prevalence mynychder prevalences mynychder prevent atal preventative model model ataliol preventative models model ataliol prevention ataliad prevention rhwystro preventions ataliad preventive care gofal ataliol preventive cares gofal ataliol preventive medicine meddygaeth ataliol preventive medicines meddygaeth ataliol previously prepared document dogfen barod previously prepared documents dogfen barod prey ysglyfaeth prey ysglyfaethu prey insect pryfyn ysglyfaeth prey insects pryfyn ysglyfaeth prey population poblogaeth yr ysglyfaeth prey populations poblogaeth yr ysglyfaeth price pris price and income elasticity elastigedd pris ac incwm price control rheoli prisiau price differentiation priswahaniaethu price discrimination gwahaniaethu prisiau price elasticity elastigedd pris price elasticity of demand elastigedd pris y galw price elasticity of supply elastigedd pris y cyflenwad price revolution chwyldro prisiau price revolutions chwyldro prisiau prices pris prices and incomes policy polisi prisiau ac incwm pricing policy polisi prisio pricing strategy strategaeth brisio prick and pounce pricio a phanlychu priest offeiriad priesthood of all believers offeiriadaeth yr holl saint priests offeiriad primacy uchafiaeth primal gwreiddiol primarrumpf lledwastad dechreuol primarrumpfs lledwastad dechreuol primary cynradd (=first tier) primary sylfaenol (=basic) primary alcohol alcohol cynradd primary alcohols alcohol cynradd primary clay clai sylfaenol primary coil coil cynradd primary coils coil cynradd primary colour lliw sylfaenol primary colours lliw sylfaenol primary consumer ysydd cynradd primary consumers ysydd cynradd primary education addysg gynradd primary educations addysg gynradd primary election rhagetholiad (US) primary elections rhagetholiad (US) primary evidence tystiolaeth wreiddiol primary evidences tystiolaeth wreiddiol primary feather prif bluen primary feathers prif bluen primary hazard perygl cynradd primary hazards perygl cynradd primary health care gofal iechyd cychwynnol primary health cares gofal iechyd cychwynnol primary industry diwydiant cynradd primary key prif allwedd primary nurse nyrs sylfaenol primary nurses nyrs sylfaenol primary nursing nyrsio sylfaenol primary productivity cynhyrchedd cynradd primary research ymchwil cynradd primary researches ymchwil cynradd primary school ysgol gynradd primary school child plentyn ysgol gynradd primary school childs plentyn ysgol gynradd primary schools ysgol gynradd primary sector sector cynradd primary sectors sector cynradd primary socialization cymdeithasoli cynradd primary source ffynhonnell wreiddiol primary sources ffynhonnell wreiddiol primary stem coesyn cynradd primary stems coesyn cynradd primary storage and secondary storage storio cynradd a storio eilaidd primate archesgob (=archbishop) primate city archddinas primates archesgob (=archbishop) prime awr brim (monastic) prime cysefin prime preimio prime factor ffactor gysefin prime factors ffactor gysefin prime meridian prif feridian prime meridians prif feridian prime minister prif weinidog prime ministers prif weinidog prime number rhif cysefin prime numbers rhif cysefin prime time oriau brig primed canvas cynfas wedi'i breimio primer paint paent preimio primer paints paent preimio primes awr brim (monastic) primeval cynoesol primitive cyntefig primitive music cerddoriaeth gyntefig primitive musics cerddoriaeth gyntefig primitivism cyntefigedd primitivisms cyntefigedd primogeniture cyntaf-anedigaeth primogenitures cyntaf-anedigaeth primordial meristem meristem brimordiol primordial meristems meristem brimordiol primrose yellow melyn y friallen primrose yellows melyn y friallen prince tywysog prince of the blood tywysog o waed princes tywysog principal pennaeth (=chief person) principal prif principal prifswm (of money) principal contractor prif gontractwr principal contractors prif gontractwr principal focus prif ffocws principal planes prif blanau principal station prif orsaf principal stations prif orsaf principal value penrhif principal values penrhif principality tywysogaeth principals pennaeth (=chief person) principals prifswm (of money) principle egwyddor principle of continuity egwyddor didoriant principles egwyddor principles of diet egwyddorion deiet principles of levers egwyddorion liferi principles of movement egwyddorion symudiad print argraffu (text) print print (=printed picture, fabric) print printio (pictures, designs) print format fformat argraffu print formats fformat argraffu print patch clwt print print patches clwt print print position cysodfan print positions cysodfan print thimble gwniadur argraffu print thimbles gwniadur argraffu print wheel olwyn argraffu print wheels olwyn argraffu printed printiedig printed circuit cylched brintiedig printed circuit board bwrdd cylched brintiedig printed circuit boards bwrdd cylched brintiedig printed circuits cylched brintiedig printed fabric ffabrig printiedig printed fabrics ffabrig printiedig printed image delwedd brintiedig printed images delwedd brintiedig printed pattern patrwm print printed patterns patrwm print printed source ffynhonnell brintiedig printed sources ffynhonnell brintiedig printed textile tecstil printiedig printed textiles tecstil printiedig printed title block bloc teitl printiedig printed title blocks bloc teitl printiedig printer argraffydd printer driver gyrrwr argraffydd printer drivers gyrrwr argraffydd printer's ink inc argraffydd printer's inks inc argraffydd printers argraffydd printing equipment offer argraffu printing ink inc argraffu printing inks inc argraffu printing material defnydd argraffu printing materials defnydd argraffu printing method dull argraffu printing methods dull argraffu printing press gwasg argraffu printing roller rholer printio printing rollers rholer printio printing stick ffon argraffu â phren printing sticks ffon argraffu â phren printing unit uned argraffu printing units uned argraffu printout allbrint printouts allbrint prints print (=printed picture, fabric) prior prior (of religious order) prior learning dysgu blaenorol prior probability rhagdebygolrwydd prioress priores prioritize blaenoriaethu priority blaenoriaeth priority interrupt ymyriad blaenoriaethol priority interrupts ymyriad blaenoriaethol priors prior (of religious order) priorship prioriaeth priorships prioriaeth priory priordy prise preis prises preis prism prism prismatic prismatig prismatic compass cwmpawd prismatig prismatoid prismatoid prismatoids prismatoid prismoid prismoid prismoidal prismoidol prismoids prismoid prisms prism prison reform diwygio'r carcharau prison simulation efelychu carchar prisoner of war camp gwersyll carcharorion rhyfel pritchel hole twll pwnsh pritchel holes twll pwnsh private milwr cyffredin (soldier) private benefits buddiannau preifat private costs costau preifat private enterprise menter breifat private enterprises menter breifat private health care gofal iechyd preifat private health cares gofal iechyd preifat private limited company cwmni cyfyngedig preifat private sale gwerthu'n breifat private school ysgol breifat private schools ysgol breifat private sector sector preifat private sectors sector preifat privateer preifatîr privateers preifatîr privates milwr cyffredin (soldier) privation amddifadrwydd privations amddifadrwydd privatization preifateiddio privatize preifateiddio privilege braint privileges braint privity of contract preifatrwydd contract prize day diwrnod gwobrwyo pro-social disposition rhagduedd cymdeithasol pro-social dispositions rhagduedd cymdeithasol proactive rhagweithiol probabilism tebygoliaeth probabilisms tebygoliaeth probability tebygolrwydd probability curve cromlin debygolrwydd probability curves cromlin debygolrwydd probability density dwysedd tebygolrwydd probability density function ffwythiant dwysedd tebygolrwydd probability density functions ffwythiant dwysedd tebygolrwydd probable tebygol probable error cyfeiliornad tebygol probable errors cyfeiliornad tebygol proban proban probans proban probate profeb (=copy of will) probate profiant (=proving of a will) probates profeb (=copy of will) probates profiant (=proving of a will) probation prawf probation profiannaeth (in strict legal context) probation officer swyddog prawf probation officers swyddog prawf probation order gorchymyn prawf probation orders gorchymyn prawf probationary period cyfnod prawf probationary periods cyfnod prawf probationer un ar brawf probationers un ar brawf probations prawf probations profiannaeth (in strict legal context) problem problem problem definition diffiniad problem problem definitions diffiniad problem problem description disgrifiad problem problem descriptions disgrifiad problem problem orientated problem gyfeiriedig problem solving datrys problemau problem solving process proses datrys problemau problem solvings datrys problemau problem specification manyleb problem problem specifications manyleb problem problems problem procedural trefniadol procedural instruction cyfarwyddyd gweithredu procedural instructions cyfarwyddyd gweithredu procedural language iaith drefniadol procedural languages iaith drefniadol procedure dull gweithredu (of series of actions) procedure trefn (=general method) procedure sheet dalen drefn procedure sheets dalen drefn procedures dull gweithredu (of series of actions) procedures trefn (=general method) proceedings achos (=action at law) proceedings trafodion (=published report) proceeds derbyniadau (sales) process cnap (anatomical) process proses process prosesu process control rheolaeth ar broses process controls rheolaeth ar broses process costing costio prosesau process journal dyddiadur proses process journals dyddiadur proses process model model proses process models model proses process production proses gynhyrchu process productions proses gynhyrchu processed cheese caws proses processed cheeses caws proses processional gorymdeithiol processor prosesydd processors prosesydd proclamation cyhoeddiad proclamations cyhoeddiad proconsul rhaglaw proconsuls rhaglaw proctor proctor proctors proctor procuration tâl esgobol (church history) procurations tâl esgobol (church history) procurator procuradur procurators procuradur procurement methods dulliau caffael produce cynhyrchu (in general) produce cynnyrch produce estyn (a line in geometry) produce backwards estyn tuag yn ôl (of line) producer cynhyrchydd producer gas nwy aer producer goods nwyddau cynhyrchydd producers cynhyrchydd produces cynnyrch product cynnyrch (in general) product lluoswm (of multiplication) product design dylunio cynnyrch product designer dylunydd cynhyrchion product designers dylunydd cynhyrchion product differentiation gwahaniaethu rhwng cynnyrch product life cycle cylchred oes cynnyrch product life cycles cylchred oes cynnyrch product moment correlation cydberthyniad moment lluoswm product moment correlations cydberthyniad moment lluoswm product placement lleoli cynnyrch product range ystod cynnyrch product ranges ystod cynnyrch production cynhyrchiad production control rheolaeth ar gynhyrchu production controls rheolaeth ar gynhyrchu production department adran gynhyrchu production departments adran gynhyrchu production of voice cynhyrchu'r llais production piece darn cynhyrchu production pieces darn cynhyrchu production plan cynllun cynhyrchu production planning cynllunio cynhyrchu production plans cynllun cynhyrchu production possibility curve cromlin posibilrwydd cynhyrchu production possibility curves cromlin posibilrwydd cynhyrchu production possibility frontier ffin eithaf posibilrwydd cynhyrchu production possibility frontiers ffin eithaf posibilrwydd cynhyrchu production specification manyleb y cynnyrch production specifications manyleb y cynnyrch productions cynhyrchiad productive cynhyrchiol productive capacity gallu cynhyrchu productive efficiency effeithlonrwydd cynhyrchiol productive investment buddsoddiad cynhyrchiol productive investments buddsoddiad cynhyrchiol productivity cynhyrchedd products cynnyrch (in general) products lluoswm (of multiplication) products of cracking cynnyrch y cracio profess different creeds arddel credoau gwahanol profession proffesiwn professional gweithiwr proffesiynol professional proffesiynol professional care gofal proffesiynol professional carer gofalydd proffesiynol professional carers gofalydd proffesiynol professional cares gofal proffesiynol professional player chwaraewr proffesiynol professional players chwaraewr proffesiynol professional sport chwaraeon proffesiynol professionalism proffesiynoldeb professionalisms proffesiynoldeb professionals gweithiwr proffesiynol professions proffesiwn proficiency hyfedredd profile proffil profile proffilio profile board bwrdd proffil profile boards bwrdd proffil profile component cydran broffil profile components cydran broffil profile of equilibrium proffil cydbwysedd profile view golwg cernlun profile views golwg cernlun profiles proffil profilm proffilm profilms proffilm profit elw profit and loss account cyfrif elw a cholled profit and loss accounts cyfrif elw a cholled profit and loss statement cyfriflen elw a cholled profit and loss statements cyfriflen elw a cholled profit margin maint yr elw profit margins maint yr elw profit maximisation gwneud yr elw mwyaf profit summary crynodeb elw profitability proffidioldeb profitable buddiol (=beneficial) profitable proffidiol (financially) profiteer budrelwa profits elw profound handicap anfantais ddifrifol profound handicaps anfantais ddifrifol progenitor hynafiad progenitors hynafiad progeny disgynyddion progesterone progesteron progesterones progesteron proglacial lake llyn cyfrewlifol proglacial lakes llyn cyfrewlifol prognosis argoel progradation allraddiad progradations allraddiad program rhaglen program rhaglennu program code cod rhaglen program codes cod rhaglen program counter rhifydd rhaglen program counters rhifydd rhaglen program design cynllun rhaglen program designs cynllun rhaglen program disk disg y rhaglen program disks disg y rhaglen program documentation dogfennaeth rhaglen program documentations dogfennaeth rhaglen program generator generadur rhaglen program generators generadur rhaglen program library llyfrgell raglenni program maintenance cynnal rhaglen program modification addasu rhaglen program overlay troshaen rhaglen program proving profi rhaglen program specification manyleb rhaglen program specifications manyleb rhaglen program testing rhoi prawf ar raglen programmable read-only memory cof rhaglenadwy darllen yn unig (PROM) programme rhaglen programme rhaglennu programme music cerddoriaeth destunol programme musics cerddoriaeth destunol programme note nodyn rhaglen programme notes nodyn rhaglen programmes rhaglen programming key allwedd raglennu programming language iaith rhaglennu programming languages iaith rhaglennu programming of leisure activities rhaglennu gweithgareddau hamdden programs rhaglen progress cynnydd progression dilyniant progressions dilyniant progressive blaengar (=innovative) progressive cynyddol (=advancing) progressive exercise ymarfer graddedig progressive exercises ymarfer graddedig progressive resistance gwrthiant cynyddol progressive resistances gwrthiant cynyddol progressive school ysgol flaengar progressive schools ysgol flaengar progressive taxes treth gynyddol progressive wave ton gynyddol progressive waves ton gynyddol prohibit gwahardd prohibition gwahardd (US) project estyn (=extend something) project project project rhagamcanu (=forecast, estimate) project taflunio (optical) project ymestyn (=extend oneself) project Washoe project Washoe project objective amcan y project project objectives amcan y project project planning cynllunio projectau project work gwaith project project works gwaith project projected profile proffil estynedig projected profiles proffil estynedig projectile taflegryn projectile vomiting chwydu hyrddiol projectiles taflegryn projecting eaves bondo ymestynnol projecting lugs clustiau estynedig projection estyniad (graph) projection rhagamcaniad (=forecast or estimate) projection tafluniad (=image projected) projection ymestyniad (=thing that obtrudes) projection line llinell dafluniad projection lines llinell dafluniad projections estyniad (graph) projections rhagamcaniad (=forecast or estimate) projections tafluniad (=image projected) projections ymestyniad (=thing that obtrudes) projective tafluniol projective illusionism rhithiolaeth dafluniol projective illusionisms rhithiolaeth dafluniol projective realism realaeth dafluniol projective realisms realaeth dafluniol projectivity taflunedd projector taflunydd projectors taflunydd projects project prolate prolad prolation proladiad prolations proladiad proletarian gwerinol proletariat proletariat proletariats proletariat proline prolin prolines prolin prologue prolog prologues prolog prolong estyn prolongation estyniad prolongations estyniad promenade promenâd promenades promenâd prominence amlygrwydd prominences amlygrwydd prominent amlwg promontory pentir promontory fort caer bentir promontory forts caer bentir promote hybu promote respect hybu parch promote understanding hybu dealltwriaeth promoting client independence hybu annibyniaeth cleientiaid promotion hyrwyddo (in the media) promotional activity gweithgaredd hyrwyddo promotional plan cynllun hyrwyddo promotional plans cynllun hyrwyddo promotional technique techneg hyrwyddo promotional techniques techneg hyrwyddo prompt annog prompt anogwr (in computing) prompts anogwr (in computing) pronation pronadiad (of foot motion) pronations pronadiad (of foot motion) prone wyneb i lawr prone-lying tor-orwedd prong fforch prong centre canol fforch prong centres canol fforch prong chuck crafanc fforch prong chucks crafanc fforch prong key allwedd fforch prongs fforch proof prawf (=evidence) proof proflen (=trial impression) proof-read darllen proflenni proofs prawf (=evidence) proofs proflen (=trial impression) prop ateg (=rigid support) prop prop (in rugby) prop shaft siafft yrru prop shafts siafft yrru propaganda propaganda propagandas propaganda propagate lledaenu propagation lledaeniad propagations lledaeniad propane propan propanes propan propel gyrru ymlaen propeller llafn gwthio propellers llafn gwthio proper priodol proper fraction ffracsiwn bondrwm proper fractions ffracsiwn bondrwm proper motion mudiant priodol proper motions mudiant priodol proper time amser priodol proper times amser priodol property eiddo (=something owned) property priodwedd (=attribute) property conveyance trosglwyddo eiddo property of metals priodwedd metelau property qualification cymhwyster eiddo property qualifications cymhwyster eiddo property rights hawliau perchenogaeth prophase proffas prophases proffas prophecy proffwydoliaeth prophet proffwyd prophetic proffwydol prophetic activity gweithgaredd proffwydol prophetic literature llenyddiaeth broffwydol prophetic literatures llenyddiaeth broffwydol prophets proffwyd prophylaxis proffylacsis proportion cyfran (=comparative part) proportion cyfrannedd (=symmetry, equality of ratios in mathematics) proportional cyfraneddol proportional characters nodau cyfrannol proportional limit terfan gyfrannol proportional limits terfan gyfrannol proportional parts cyfrannau proportional printing argraffu cyfrannol proportional representation cynrychiolaeth gyfrannol proportional representations cynrychiolaeth gyfrannol proportional spacing bylchu cyfrannol proportional symbols symbolau cyfrannol proportionalism cyfranoliaeth proportionalisms cyfranoliaeth proportions cyfran (=comparative part) proportions cyfrannedd (=symmetry, equality of ratios in mathematics) proposal cynnig proposals cynnig proposed changes newidiadau arfaethedig proposed new housing estate stad o dai newydd arfaethedig proposed new housing estates stad o dai newydd arfaethedig proposed target targed arfaethedig proposed targets targed arfaethedig proposition gosodiad propositions gosodiad proprioception propriodderbyniaeth proprioceptions propriodderbyniaeth props ateg (=rigid support) props prop (in rugby) propulsion gwthio prorogue gohirio proscenium prosceniwm prosceniums prosceniwm prosecute erlyn prosecutes erlyn prosecution erlyniad prosecutions erlyniad prosecutor erlynydd prosecutors erlynydd proselyte proselyt proselytes proselyt proselytism proselytiaeth proselytisms proselytiaeth prospectus prosbectws prosperity ffyniant prosthesis prosthesis protagonist ymgyrchwr protagonists ymgyrchwr protect amddiffyn (=defend) protect diogelu (=keep safe) protect tab tab diogelu protect tabs tab diogelu protected software meddalwedd wedi'i diogelu protected softwares meddalwedd wedi'i diogelu protected tenancy tenantiaeth warchodedig protecting data gwarchod data protection amddiffyniad (=defence) protection diogelwch (=safety) protection mechanism dull diogelu protection mechanisms dull diogelu protection order gorchymyn amddiffyn protection orders gorchymyn amddiffyn protectionism diffynnaeth protectionisms diffynnaeth protectionist policy polisi diffynnaeth protections amddiffyniad (=defence) protections diogelwch (=safety) protective amddiffynnol protective clothing dillad gwarchod protective coating araen ddiogelu protective coatings araen ddiogelu protective colouration lliwiad gwarchodol protective colourations lliwiad gwarchodol protective edging ymyl amddiffyn protective edgings ymyl amddiffyn protective film ffilm warchod protective films ffilm warchod protective finish gorffeniad diogelu protective finishs gorffeniad diogelu protective foods bwydydd amddiffyn protective wear gwisg warchodol protective wears gwisg warchodol protector amddiffynnydd protectorate protectoriaeth protectorates protectoriaeth protectors amddiffynnydd protein protein proteinaceous stain staen protein proteinaceous stains staen protein proteinase proteinas proteinases proteinas proteins protein protest protest protest protestio protest movement mudiad protest protest movements mudiad protest protestation protestiad protestations protestiad protests protest protocol protocol protocols protocol protoctinium protoctiniwm (Pa) protoctiniums protoctiniwm (Pa) proton proton proton pump pwmp proton proton pumps pwmp proton protonotary protonoteri protons proton prototype prototeip prototype solution ateb prototeip prototype solutions ateb prototeip prototype system system brototeip prototype systems system brototeip prototypes prototeip protozoan protosoad protozoans protosoad protractor onglydd protractors onglydd protrude ymwthio allan protrusion ymwthiad allan protrusions ymwthiad allan prove profi provenance tarddiad provenances tarddiad provide darparu providence rhagluniaeth providences rhagluniaeth province talaith provinces talaith provincial taleithiol provision cyflwyniad (papal) provision darpariaeth provisional dros dro provisional ball pêl ddarpar provisional balls pêl ddarpar provisional government llywodraeth dros dro provisional governments llywodraeth dros dro provisions cyflwyniad (papal) provisions darpariaeth provost profost provost marshal profost-farsial provost marshals profost-farsial provosts profost proximal procsimol proxy dirprwyol psalm salm psalms salm psalter sallwyr psalters sallwyr psammosere samoser psammoseres samoser pseudo-code ffug-god pseudo-codes ffug-god pseudo-instruction ffug-gyfarwyddyd pseudo-instructions ffug-gyfarwyddyd pseudo-operation ffugweithrediad pseudo-operations ffugweithrediad pseudo-random ffug-hap pseudo-randoms ffug-hap pseudo-server ffugweinydd pseudo-servers ffugweinydd psychiatric seiciatrig psychiatric hospital ysbyty meddwl psychiatric hospitals ysbyty meddwl psychiatrist seiciatrydd psychiatrists seiciatrydd psychiatry seiciatreg psychoanalysis seicdreiddiad psychodynamic play therapy therapi chwarae seicodynamig psychogenic seicogenig psychogeriatrician seicogeriatregydd psychogeriatricians seicogeriatregydd psycholegal study astudiaeth seico-gyfreithiol psychological seicolegol psychological autopsy awtopsi seicolegol psychological intervention ymyriad seicolegol psychological interventions ymyriad seicolegol psychological model model seicolegol psychological models model seicolegol psychologist seicolegydd psychologists seicolegydd psychology seicoleg psychometric testing profi seicometrig psychomotor skill sgìl seicoechddygol psychomotor skills sgìl seicoechddygol psychopath seicopath psychopaths seicopath psychosexual seicorywiol psychosis seicosis psychosomatic seicosomatig psychotherapy seicotherapi psychotic art celfyddyd seicotig psychotic arts celfyddyd seicotig puberty glasoed public cyhoeddus public body corff cyhoeddus public building adeilad cyhoeddus public buildings adeilad cyhoeddus public convenience cyfleusterau cyhoeddus public goods nwyddau cyhoeddus public health iechyd y cyhoedd public healths iechyd y cyhoedd public house tŷ tafarn public houses tŷ tafarn public inquiry ymchwiliad cyhoeddus public limited company cwmni cyfyngedig cyhoeddus (p.l.c.) public notary notari'r cyhoedd public ownership perchnogaeth gyhoeddus public ownerships perchnogaeth gyhoeddus public path llwybr cyhoeddus public paths llwybr cyhoeddus public policy polisi cyhoeddus public relations cysylltiadau cyhoeddus public relations officer swyddog cysylltiadau cyhoeddus public relations officers swyddog cysylltiadau cyhoeddus public right of way hawl tramwy cyhoeddus public school ysgol fonedd public schools ysgol fonedd public sector sector cyhoeddus public sector net cash requirements gofynion arian parod net y sector cyhoeddus public sector venture menter sector cyhoeddus public sector ventures menter sector cyhoeddus public sectors sector cyhoeddus public service gwasanaeth cyhoeddus public services gwasanaeth cyhoeddus public transport cludiant cyhoeddus public transport service gwasanaeth cludiant cyhoeddus public transport services gwasanaeth cludiant cyhoeddus public transports cludiant cyhoeddus public utilities gwasanaethau cyhoeddus publication cyhoeddiad publications cyhoeddiad publicity flyer taflen cyhoeddusrwydd publicity flyers taflen cyhoeddusrwydd publish cyhoeddi publisher cyhoeddwr publishers cyhoeddwr pucker rhychu puddle pwdlo puddle pwll puddler pydlwr puddlers pydlwr puddles pwll puddling furnace ffwrnais bwdlo puddling furnaces ffwrnais bwdlo puffed sleeve llawes bwff puffed sleeves llawes bwff pug cleio pug mill melin gleio pug mills melin gleio puja puja pujas puja pull tyniad pull tynnu pull a muscle tynnu cyhyr pull down tynnu lawr pull shot tyniad pull shots tyniad pull the ball tynnu'r bêl pulley pwli pulley block bloc pwli pulley blocks bloc pwli pulley guide cyfeirydd pwli pulley guides cyfeirydd pwli pulley housing rhigol bwli pulley housings rhigol bwli pulley stile cledren bwli pulley stiles cledren bwli pulling the punch lleddfu'r ddyrnod pullover pwlofer pullovers pwlofer pulls tyniad pulmonary ysgyfeiniol pulmonary system system ysgyfeiniol pulmonary systems system ysgyfeiniol pulp bywyn (of tooth) pulp mwydion (=soft thick wet mass) pulp mwydion coed (from wood) pulp pwlp (of fruit) pulpit pulpud pulpits pulpud pulpitum croglofft pulpitums croglofft pulps bywyn (of tooth) pulps pwlp (of fruit) pulsate pylsadu pulsating star seren guriadol pulsating stars seren guriadol pulsation curiad pulsations curiad pulsator pylsadur pulsators pylsadur pulse curiad (in general) pulse pwls (in technical usage) pulse detector canfodydd curiadau pulse detectors canfodydd curiadau pulse pattern patrwm curiadau (pulse train) pulse patterns patrwm curiadau (pulse train) pulse position modulation modyliad safle pwls pulse position modulations modyliad safle pwls pulse rate cyfradd curiad y galon pulse rates cyfradd curiad y galon pulse width lled pwls pulse widths lled pwls pulses curiad (in general) pulses pwls (in technical usage) pulverization pylori pumice pwmis pumice powder powdr pwmis pumice powders powdr pwmis pumices pwmis pump pwmp pump storage storfa bwmp pump storages storfa bwmp pumps pwmp pun chwarae ar eiriau pun gair mwys puna pwna punas pwna punch dyrnod (=blow) punch dyrnu (=strike) punch pwnsh (for making holes) punch pwnsio (=make holes) punch bag bag dyrnu punch bags bag dyrnu punch ball pêl ddyrnu punch balls pêl ddyrnu punch hole twll pwnsh punch holes twll pwnsh punch pad pad dyrnu punch pads pad dyrnu punch stitch pwyth tyllog punch stitches pwyth tyllog punch strip banden dyllog punch strips banden dyllog punched card cerdyn tyllog punched cards cardiau tyllog punched cards cerdyn tyllog punched hole twll wedi'i bwnsio punched holes twll wedi'i bwnsio punched paper tape tâp papur tyllog punched paper tapes tâp papur tyllog punches dyrnod (=blow) punches pwnsh (for making holes) punching pwnsio (forging process) punctuation atalnodi puncture wound clwyf trywaniad puncture wounds clwyf trywaniad punishment cosb punishments cosb punitive cosbol punitive expedition ymgyrch gosbi punitive expeditions ymgyrch gosbi punt pwnt punt pyntio (kick) punteado punteado punts pwnt pupil cannwyll llygad (of eye) pupil disgybl (=schoolchild) pupil profile proffil disgybl pupil profiles proffil disgybl pupil-teacher ratio cymhareb disgybl-athro pupils cannwyll llygad (of eye) pupils disgybl (=schoolchild) puppet pyped puppet regime llywodraeth byped puppet regimes llywodraeth byped puppet stage llwyfan pypedau puppet stages llwyfan pypedau puppet state gwladwriaeth byped puppet states gwladwriaeth byped puppet theatre theatr bypedau puppet theatres theatr bypedau puppeteer pypedwr puppeteers pypedwr puppets pyped purchase prynu purchase ledger llyfr pryniadau purchase ledgers llyfr pryniadau purchase order archeb prynu purchase orders archeb prynu purchase tax treth bryniant purchase taxes treth bryniant purchasing cycle cylchred prynu purchasing cycles cylchred prynu purchasing power gallu prynu purchasing powers gallu prynu pure pur pure colour lliw pur pure colours lliw pur pure culture of bacteria meithriniad pur o facteria pure ellipse gwir elips pure ellipses gwir elips pure mathematics mathemateg bur pure white surface arwyneb purwyn pure white surfaces arwyneb purwyn purgatory purdan purge carthu purism purdebaeth purisms purdebaeth purist purydd purists purydd puritan piwritan puritan piwritanaidd puritanism piwritaniaeth puritanisms piwritaniaeth puritans piwritan purl stitch pwyth o chwith purl stitches pwyth o chwith purled edge ymyl pwyth o chwith purled edges ymyl pwyth o chwith purlin trawslath purlin roof to trawslath purlin roofs to trawslath purlins trawslath purple porffor (tempering colour) purple brown porffor brown (tempering colour) purple browns porffor brown (tempering colour) purples porffor (tempering colour) purpose built resort canolfan wyliau sydd wedi'i hadeiladu'n bwrpasol purpose built resorts canolfan wyliau sydd wedi'i hadeiladu'n bwrpasol purposeful concurrent use of language trawsieithu pursuivant pwrswifant pursuivants pwrswifant purvey arlwyo purveyance arlwyaeth purveyances arlwyaeth purveyor arlwywr purveyors arlwywr pus crawn push gwthiad push gwthio push fit gwthffit push fits gwthffit push moraine marian gwthio push moraines marian gwthio push pass gwrthbas push rod rhoden wthio push rods rhoden wthio push stick ffon wthio push stick pren gwthio (power sawing) push sticks ffon wthio push sticks pren gwthio (power sawing) push-chair cadair wthio push-chairs cadair wthio push-down cywasgedig push-down cywasgu push-up gwrthwasgedig push-up gwrthwasgu pushs gwthiad put rhoi put on a collar gosod coler put on probation rhoi ar brawf put the switch off agor y switsh (=open the switch) put the switch on cau'r switsh (=close the switch) putt pytio putting the shot gwthio'r pwysau putty pwti pygmy pigmi pyjamas pyjamas pylon peilon pylons peilon pyramid pyramid pyramidal pyramidaidd pyramidal face wyneb pyramidaidd pyramidal faces wyneb pyramidaidd pyramidal peak pigyn pyramidaidd pyramidal peaks pigyn pyramidaidd pyramids pyramid pyramids of biomass pyramidiau biomas pyramids of numbers pyramidiau niferoedd (in ecology) pyre coelcerth (in funeral ceremony) pyres coelcerth (in funeral ceremony) pyrexia gwres pyrexias gwres pyrites pyrit pyroclast pyroclast pyroclastian pyroclastaidd pyroclastic pyroclastig pyroclasts pyroclast pyrocouple pyrocwpl pyrocouples pyrocwpl pyrometer pyromedr pyrometers pyromedr pyrometric pyrometrig pyrometric cone côn pyrometrig pyrometric cones côn pyrometrig pyrometry pyrometreg pyroxylin pyrocsilin pyroxylins pyrocsilin qanat canat qanats canat quadrangle pedrongl quadrangles pedrongl quadrant pedrant quadrant arch bwa pedrant quadrant arches bwa pedrant quadrant moulding mowldin pedrant quadrant mouldings mowldin pedrant quadrants pedrant quadrat cwadrad quadrate cwadrat quadrates cwadrat quadratic cwadratig quadratic equation hafaliad cwadratig quadratic equations hafaliad cwadratig quadrats cwadrad quadrennial pob pedair blynedd quadriceps cwadriceps quadrilateral pedrochr quadrilaterals pedrochr quadrille cwadríl quadrilles cwadríl quadriplegia parlys pedwar aelod quadriplegias parlys pedwar aelod quadruped pedwartroedyn quadrupeds pedwartroedyn quadruple pedwarplyg quadruple stopping gwasgiad pedwarplyg quadruple stoppings gwasgiad pedwarplyg quadruplet pedrybled quadruplets pedrybled quagmire siglen quagmires siglen qualification cymhwyster qualifications cymhwyster qualified cymwysedig qualifier goleddfwr (in grammar) qualifiers goleddfwr (in grammar) qualify ymgymhwyso (oneself for a job) qualitative ansoddol qualitative analysis dadansoddiad ansoddol qualitative data data ansoddol qualitative evidence tystiolaeth ansoddol qualitative evidences tystiolaeth ansoddol qualitative research ymchwil ansoddol qualitative researches ymchwil ansoddol qualitative work gwaith ansoddol qualitative works gwaith ansoddol quality ansawdd quality assurance sicrhau ansawdd quality assurance procedure dull sicrhau ansawdd quality assurance procedures dull sicrhau ansawdd quality assurances sicrhau ansawdd quality circle cylch ansawdd quality circles cylch ansawdd quality control rheoli ansawdd quality of life ansawdd bywyd quality of the environment ansawdd yr amgylchedd quality system system ansawdd quality systems system ansawdd quality variation amrywiaeth ansawdd quality variations amrywiaeth ansawdd quango cwango quantifiable mesuradwy quantify meintioli (in technical usage) quantify mesur (in non-technical usage) quantisation error gwall cwanteiddio quantisation errors gwall cwanteiddio quantitative meintiol quantitative analysis dadansoddiad meintiol quantitative approach dull meintiol quantitative approaches dull meintiol quantitative evidence tystiolaeth feintiol quantitative evidences tystiolaeth feintiol quantitative treatment triniaeth feintiol quantitative treatments triniaeth feintiol quantities of data meintiau o ddata quantity maint (=how much) quantity mesur (=property of thing that is measurable) quantity rhywfaint (unspecified, e.g. of soil) quantity demanded maint y galw quantity demandeds maint y galw quantity supplied maint y cyflenwad quantity supplieds maint y cyflenwad quantity surveyor syrfëwr meintiau quantity surveyors syrfëwr meintiau quantity theory damcaniaeth maint quantization cwanteiddiad quantizations cwanteiddiad quantize cwanteiddio quantized cwanteiddiedig quantum cwantwm quantum theory damcaniaeth cwantwm quantums cwantwm quarantine cwarantin quarantine period cyfnod cwarantin quarantine periods cyfnod cwarantin quarantines cwarantin quark cwarc quarks cwarc quarry chwarel quarry tile teilsen chwarel quarry tiles teilsen chwarel quarrying chwarela quarter chwarter (=one fourth) quarter rhan (=part of town etc) quarter full size chwarter maint llawn quarter full sizes chwarter maint llawn quarter moon chwarter lleuad quarter moons chwarter lleuad quarter of a whole chwarter un cyfan quarter round moulding mowldin chwarter crwn quarter round mouldings mowldin chwarter crwn quarter sawn llifiad rheiddiol quarter sawns llifiad rheiddiol quarter turn chwarter tro (right angle) quarter turns chwarter tro (right angle) quarter-comma mean-tone tuning tiwnio tôn-gymedr chwarter-coma quartered oak derw rheidd-dor quartered oaks derw rheidd-dor quartered panel panel rheiddiol quartered panels panel rheiddiol quartering chwarteru quartermaster swyddog cyflenwi quartermasters swyddog cyflenwi quarters chwarter (=one fourth) quarters rhan (=part of town etc) quartet pedwarawd quartets pedwarawd quartic cwartig quartic equation hafaliad cwartig quartic equations hafaliad cwartig quartile chwartel quartile point pwynt chwartel quartile points pwynt chwartel quartiles chwartel quarto cwarto quartz cwarts quartzes cwarts quartzite cwartsit quartzites cwartsit quasi-field cwasi-faes quasi-fields cwasi-faes quasi-group cwasi-grŵp quasi-groups cwasi-grŵp quasistatic cwasistatig quaternary cwaternaidd quaternion cwaternion quaternions cwaternion quaver cwafer (eighth-note) quavers cwafer (eighth-note) quay cei queen dowager gweddw'r brenin queen dowagers gweddw'r brenin queenpost banonbost queenposts banonbost quench trochoeri quern breuan querns breuan query ymholi query ymholiad query language iaith ymholi query languages iaith ymholi question cwestiwn question and answer a data file holi ac ateb ffeil ddata question bank cronfa gwestiynau question banks cronfa gwestiynau question mark gofynnod question marks gofynnod questioning cwestiynu (as a teaching method, doubting) questioning holi (=asking) questionnaire holiadur questionnaires holiadur questions cwestiwn queue ciw queues ciw queuing theory theori ciwio quick cyflym quick adjustment cymhwysiad cyflym quick adjustments cymhwysiad cyflym quick change post post newid cyflym quick change posts post newid cyflym quick drying sychu'n gyflym quick frozen food bwyd wedi'i rewi'n gyflym quick frozen foods bwyd wedi'i rewi'n gyflym quick response and mental calculation cards cardiau ymatebion cyflym a chyfrifiadau pen quick silver arian byw quick silvers arian byw quick unpick datodydd quick unpicks datodydd quick-action nut nyten chwimwth quick-action nuts nyten chwimwth quick-release mechanism mecanwaith rhyddhau cyflym quick-release mechanisms mecanwaith rhyddhau cyflym quick-return mechanism mecanwaith dychwel cyflym quick-return mechanisms mecanwaith dychwel cyflym quickening bywiocáu (of foetus) quicklime calch brwd quicklimes calch brwd quicksands sugndraeth quickstep quickstep quicksteps quickstep quiet distaw quietism tawelyddiaeth quietisms tawelyddiaeth quietist tawelwr quietists tawelwr quill cwilsen (lathe part) quill brush brwsh cwilsen quill brushs brwsh cwilsen quill pen pen cwilsen quill pens pen cwilsen quills cwilsen (lathe part) quilt cwilt quilt cwiltio quilter cwiltell (machine attachments) quilters cwiltell (machine attachments) quilting cwiltio quilting frame ffrâm gwiltio quilting frames ffrâm gwiltio quilts cwilt quincentennial pumcanmlwyddiant quincentennials pumcanmlwyddiant quinine cwinin quinines cwinin quinquennial pob pum mlynedd quintet pumawd quintets pumawd quintuplet pumled quintuplets pumled quire cwir quires cwir quirk cwirc quirk bead glain cwirc quirk beads glain cwirc quirks cwirc quit gadael quit claim ildio hawl quiver cawell saethau quivers cawell saethau quiz cwis quizes cwis quoin conglfaen quoins conglfaen quoit coeten quoit coetio quoits coeten quorum cworwm quorums cworwm quota cwota quota reduction gostwng cwotâu quotas cwota quotation dyfyniad quotation aspect agwedd mesuriad (of division) quotation aspects agwedd mesuriad (of division) quotation mark dyfynnod quotation marks dyfynnod quotations dyfyniad quotient cyniferydd quotient rule rheol cyniferydd quotient rules rheol cyniferydd quotients cyniferydd rabbet rabad rabbet rabedu rabbet joint uniad rabad rabbet joints uniad rabad rabbet plane plaen rabad rabbet planes plaen rabad rabbeted stile cledren rabedog rabbeted stiles cledren rabedog rabbeted weather boarding byrddau hindraul rabedog rabbets rabad rabbi rabbi rabbis rabbi rabbit punch dyrnod gwar rabbit punches dyrnod gwar rabble ciwed rabbles ciwed rabies y gynddaredd race hil race ras race rasio race relations cysylltiadau hiliol racemate racemad racemates racemad raceme racem racemes racem racemic racemig (in chemistry) racemization racemeiddiad racemizations racemeiddiad racemose racemaidd races hil races ras rachis rachis racial hiliol racial community cymuned hiliol racial conflict gwrthdaro hiliol racial discrimination gwahaniaethu hiliol racial segregation arwahanu hiliol racing dive deif ras racing dives deif ras racism hiliaeth racisms hiliaeth racist hiliwr racists hiliwr rack arteithglwyd (for torture) rack rac (lathe part) rack rhesel (=shelf) rack and pinion rac a phiniwn rack and pinion railway rheilffordd rac a phiniwn rack-rent rhacrentu racket raced racket parts rhannau o'r raced racket weight pwysau'r raced racketeer llwgr-fasnachwr racketeers llwgr-fasnachwr rackets raced racks arteithglwyd (for torture) racks rac (lathe part) racks rhesel (=shelf) radar radar radars radar raddle radl raddles radl radial rheiddiol radial easel îsl rheiddiol radial easels îsl rheiddiol radial flute ffliwt reiddiol radial flutes ffliwt reiddiol radial line llinell reiddiol radial lines llinell reiddiol radial sawcut llifiad rheiddiol radial sawcuts llifiad rheiddiol radial section toriad rheiddiol radial sections toriad rheiddiol radial shake hollt rheiddiol radial shakes hollt rheiddiol radial symmetry cymesuredd rheiddiol radian radian radians radian radiant pelydrol radiant heat gwres pelydrol radiant heats gwres pelydrol radiate pelydru radiating line llinell belydrol radiating lines llinell belydrol radiation pelydriad (in general) radiation ymbelydredd (radioactive) radiation fog niwl pelydriad radiation fogs niwl pelydriad radiation pyrometer pyromedr pelydriad radiation pyrometers pyromedr pelydriad radiation sickness salwch ymbelydredd radiations pelydriad (in general) radiations ymbelydredd (radioactive) radiator pelydrydd (of light, heat) radiator rheiddiadur (of heating system) radiators pelydrydd (of light, heat) radiators rheiddiadur (of heating system) radical radical radical cadence diweddeb cordiau gwreiddiol radical cadences diweddeb cordiau gwreiddiol radical philosopher athronydd radicalaidd radical philosophers athronydd radicalaidd radicalism radicaliaeth radicalisms radicaliaeth radicals radical radicle cynwreiddyn radicles cynwreiddyn radio radio radio or tv mast mast radio neu deledu radio or tv masts mast radio neu deledu radio receiver derbynnydd radio radio receivers derbynnydd radio radio star seren radio radio stars seren radio radio wave ton radio radio waves ton radio radioactive ymbelydrol radioactive decay dadfeiliad ymbelydrol radioactive emission allyriad ymbelydrol radioactive emissions allyriad ymbelydrol radioactive fallout alldafliad ymbelydrol radioactive fallouts alldafliad ymbelydrol radioactive particle gronyn ymbelydrol radioactive particles gronyn ymbelydrol radioactive source ffynhonnell ymbelydrol radioactive sources ffynhonnell ymbelydrol radioactive substance sylwedd ymbelydrol radioactive substances sylwedd ymbelydrol radioactivity ymbelydredd radioastronomy radioseryddiaeth radiograph radiograff radiographer radiograffydd radiographers radiograffydd radiographs radiograff radiography radiograffeg radiologist radiolegydd radiologists radiolegydd radiology radioleg radiotherapy radiotherapi radium radiwm (Ra) radiums radiwm (Ra) radius radiws (in geometry etc) radius rhaidd (in botany) radius gauge medrydd radiws radius gauges medrydd radiws radius of gyration radiws chwyrliant radiused corner cornel gron radiused corners cornel gron radiusing radiysu (lathe tool) radix radics radixes radics radon radon (Rn) radon gas nwy radon radons radon (Rn) raffia raffia raffia weaving plethu raffia raffia work gwaith raffia raffia works gwaith raffia raffias raffia raft foundation sylfaen rafft raft foundations sylfaen rafft rafter ceibr rafters ceibr rafting rafftio rag cerpyn rag bag bag carpiau rag bags bag carpiau rag bolt bollt sylfaen rag bolts bollt sylfaen rag paper papur lliain rag papers papur lliain rag week wythnos rag rag weeks wythnos rag ragged school ysgol y tlodion ragged schools ysgol y tlodion ragged shores glannau bylchog raglan sleeve llawes raglan raglan sleeves llawes raglan ragtime ragtime ragtimes ragtime raid cyrch raids cyrch rail rheilen rail junction cyffordd trenau rail junctions cyffordd trenau rails rheilen railway rheilffordd railway siding lein aros railway sidings lein aros railway station gorsaf drenau railway stations gorsaf drenau rain proof gwrthlaw rain shadow cysgod glaw rain shadows cysgod glaw rainbow enfys rainbows enfys rainfall glawiad rainfall regime patrymedd glawiad rainfall regimes patrymedd glawiad rainfall reliability dibynadwyedd glawiad rainfall variability amrywioldeb glawiad rainfalls glawiad rainforest coedwig law rainforests coedwig law rainwash glawred rainwashs glawred rainwater dŵr glaw rainwaters dŵr glaw raise codi raise a perpendicular codi perpendicwlar raise or lower codi neu ostwng raise stitches codi pwythau (scorping) raised beach cyfordraeth raised beaches cyfordraeth raised bog cyforgors raised bogs cyforgors raised cliff cyforglogwyn raised cliffs cyforglogwyn raised head copog uchel (machine screws) raised head screw sgriw gopog raised head screws sgriw gopog raised panel panel wedi'i godi raised panels panel wedi'i godi raised work gwaith codi raised works gwaith codi raising hammer morthwyl codi raising hammers morthwyl codi raising mallet gordd godi raising mallets gordd godi rake cribin (implement) rake cribinio (with implement) rake gwyredd (of sloping angle) rake angle ongl wyredd (drill part) rake angles ongl wyredd (drill part) rakes cribin (implement) rakes gwyredd (of sloping angle) raking out glanhau allan raking shore ateg ogwydd raking shores ateg ogwydd raku racw rakus racw rally rali ram hwrdd rammer hyrddwr rammers hyrddwr ramming blocks blociau hyrddu ramp ramp rampart rhagfur ramparts rhagfur ramps ramp ranch ransh ranch ransio ranch style bungalow byngalo dull ransh ranch style bungalows byngalo dull ransh ranch-house tŷ ransh ranch-houses tŷ ransh ranches ransh randing plethu random hap random access hapgyrch random access hapgyrchu random access file ffeil hapgyrchu random access files ffeil hapgyrchu random access memory cof hapgyrch (RAM) random access store storfa hapgyrch random access stores storfa hapgyrch random choice hapddewis random error hapgyfeiliornad random errors hapgyfeiliornad random event hapddigwyddiad random events hapddigwyddiad random experiment haparbrawf random experiments haparbrawf random file ffeil hapgyrchu random files ffeil hapgyrchu random length hap-hyd random lengths hap-hyd random motion mudiant afreolus random motions mudiant afreolus random number haprif random number generator generadur haprifau random number generators generadur haprifau random numbers haprif random pattern hapbatrwm random patterns hapbatrwm random sample hapsampl random samples hapsampl random scale value gwerth hapraddfa random scale values gwerth hapraddfa random selection hapddethol random variable hapnewidyn random variables hapnewidyn random walk hapgerddediad random walks hapgerddediad randomly select dethol ar hap range amrediad (=extent) range amrywiaeth (=variety) range cyrhaeddiad (=reach) range dewis (of products) range ystod (of ability etc) range of gymnastic action amrywiaeth o weithrediadau gymnastig range of mountains cadwyn o fynyddoedd range of music amrywiaeth o gerddoriaeth range of performance ystod o berfformiad range of tide amrediad llanw range of variations amrediad yr amrywiadau range statements datganiadau ystod ranger ceidwad rangers ceidwad ranges amrediad (=extent) ranges amrywiaeth (=variety) ranges cyrhaeddiad (=reach) ranges dewis (of products) ranges ystod (of ability etc) ranging pole polyn anelu ranging poles polyn anelu rank gradd (=position in hierarchy) rank graddio (in economics) rank rheng (=row or line) rank safle (=position in general) rank set o bibau (on organ) rank correlation cydberthyniad rhestrol rank correlations cydberthyniad rhestrol rank order trefn restrol rank orders trefn restrol rank size rule rheol gradd a maint rank size rules rheol gradd a maint ranking method dull graddio ranking methods dull graddio ranks gradd (=position in hierarchy) ranks rheng (=row or line) ranks safle (=position in general) ranks set o bibau (on organ) ranks of windows rhesi o ffenestri ransom pridwerth ransoms pridwerth rap cnoc (=knock) rap cnocio (=knock) rape trais rhywiol rapes trais rhywiol rapid hardening cement sment cyflym-galedu rapid hardening cements sment cyflym-galedu rapier cleddyf main rapiers cleddyf main rapping iron haearn cnocio rapping irons haearn cnocio rapping tool erfyn cnocio rapping tools erfyn cnocio rare earth prinfwyn rare earths prinfwyn rare gas nwy prin rarefaction teneuad rarefactions teneuad rash brech rashs brech rasp rhathell rasp rhathellu rasp cut toriad rhathell rasp cuts toriad rhathell raspberries mafon rasps rhathell rasqueado rasqueado ratchet clicied ddannedd ratchet and pawl clicied a phawl ratchet brace carntro clicied ratchet braces carntro clicied ratchet drill dril clicied ratchet drills dril clicied ratchet easel îsl clicied ratchet easels îsl clicied ratchet pawl pawl clicied ratchet pawls pawl clicied ratchet screwdriver tyrnsgriw clicied ratchet screwdrivers tyrnsgriw clicied ratchet stop stop clicied ratchet stops stop clicied ratchet teeth dannedd clicied ratchet wheel olwyn glicied ratchet wheels olwyn glicied ratchets clicied ddannedd rate cyfradd (=numerical proportion) rate of decrease cyfradd lleihad rate of exchange cyfradd cyfnewid rate of feed cyfradd porthiant rate of growth cyfradd twf rate of interest cyfradd llog rate of mutations cyfradd mwtaniadau rate of photosynthesis cyfradd ffotosynthesis rate of progress cyfradd cynnydd rate of reaction cyfradd adwaith rate of return on capital employed cyfradd yr adenillion ar y cyfalaf a ddefnyddiwyd rate of striking amseriad taro rate of transferring energy cyfradd trosglwyddo egni rate of water loss cyfradd colli dŵr rate of weight loss cyfradd colli pwysau rate of working cyfradd gweithio rate payer trethdalwr rate payers trethdalwr rate per cent cyfradd y cant rate per cents cyfradd y cant rate rebate ad-daliad treth rate rebates ad-daliad treth rate subsidy cymhorthdal trethi rate-support grant grant cynnal trethi rate-support grants grant cynnal trethi rateable ardrethol rateable value gwerth ardrethol rateable values gwerth ardrethol rates cyfradd (=numerical proportion) ratify cadarnhau ratings maint cynulleidfa (=audience size) ratio cymhareb ratio analysis dadansoddi cymarebau (in general) ratio analysis dadansoddiad cymarebau (of individual instances) ration dogn ration dogni ration book llyfr dogni ration books llyfr dogni rational cymarebol (of ratios) rational rhesymol (=based on reason) rational choice theory theori dewis rhesymegol rational function ffwythiant cymarebol rational functions ffwythiant cymarebol rational number rhif cymarebol rational numbers rhif cymarebol rationale sail resymegol rationales sail resymegol rationalisation rhesymoliad rationalisations rhesymoliad rationalism rhesymoliaeth rationalisms rhesymoliaeth rations dogn rattan corsen rattan palm palmwydden corsen rattan palms palmwydden corsen rattans corsen rattle rhuglen rattle rhuglo rattles rhuglen ravage anrheithio ravine dyfnant ravines dyfnant raw crai raw data data crai raw edge ymyl grai raw edges ymyl grai raw fibre ffibr crai raw fibres ffibr crai raw glaze gwydredd crai raw glazes gwydredd crai raw materials deunyddiau crai raw sienna sienna crai raw siennas sienna crai raw silk sidan crai raw silks sidan crai raw steel dur crai raw steels dur crai raw umber wmber crai raw umbers wmber crai rawhide mallet gordd lledr crai rawhide mallets gordd lledr crai rawlbolt rawlfollt rawlbolts rawlfollt ray paladr ray pelydryn (in chemistry and physics) ray rheidden (in physiology and biology) ray box blwch pelydru ray boxes blwch pelydru ray diagram diagram pelydrol ray diagrams diagram pelydrol rayon reion rayon acetate reion asetad rayon acetates reion asetad rayon cord cord reion rayon cords cord reion rayons reion razorbill gwalch y penwaig razorbills gwalch y penwaig re-deposit ailddyddodi re-enter adfewnio (in computing) re-entrant adfewniadol (in computing) re-entrant adfewnol (in geography) re-entrant contour line cyfuchlin adfewnol re-entrant contour lines cyfuchlin adfewnol re-entry adfewniad (in computing) re-equip ailgyfarparu re-establish ailsefydlu re-export ailallforio re-texture adweadu re-touching varnish farnais aildrwsio re-touching varnishs farnais aildrwsio reabsorption adamsugniad (renal) reabsorptions adamsugniad (renal) reach cyrhaeddiad reach cyrraedd reach estyniad (of river) reach one's majority dod i oed reaches cyrhaeddiad reaches estyniad (of river) react adweithio (of chemical) react ymateb (of person) reactance adweithedd reactances adweithedd reactant adweithydd reactants adweithydd reaction adwaith (physiological or chemical) reaction activator actifadydd adwaith reaction activators actifadydd adwaith reaction kinetics cineteg adweithiau reaction mixture cymysgedd adwaith reaction mixtures cymysgedd adwaith reaction rate cyfradd adwaith reaction rate expression mynegiad cyfradd adwaith reaction rate expressions mynegiad cyfradd adwaith reaction rates cyfradd adwaith reaction speed cyflymder adwaith reaction speeds cyflymder adwaith reaction time amser adweithio reaction timer amserydd adweithio reaction timers amserydd adweithio reaction times amser adweithio reactionary policy polisi adweithiol reactions adwaith (physiological or chemical) reactive adweithiol reactive depression iselder adweithiol reactive depressions iselder adweithiol reactive dye llifyn adweithiol reactive dyes llifyn adweithiol reactivity adweithedd reactivity series cyfres adweithedd reactor adweithydd reactors adweithydd read darllen read / write channel sianel darllen ac ysgrifennu read / write channels sianel darllen ac ysgrifennu read / write head pen darllen ac ysgrifennu read / write heads pen darllen ac ysgrifennu read head pen darllen read heads pen darllen read speed cyflymder darllen read speeds cyflymder darllen read time amser darllen read times amser darllen read-only memory cof darllen yn unig (ROM) reader darllenydd reader profile proffil darllenydd reader profiles proffil darllenydd readers darllenydd readers newsletter cylchlythyr darllenwyr readers newsletters cylchlythyr darllenwyr reading darlleniad reading age oed darllen reading ages oed darllen reading comprehension darllen a deall reading corner cornel ddarllen reading corners cornel ddarllen reading scheme cynllun darllen reading schemes cynllun darllen reading test prawf darllen reading tests prawf darllen readings darlleniad readjust ailgymhwyso readout allddarlleniad readouts allddarlleniad ready veneer board bwrdd argaen parod ready veneer boards bwrdd argaen parod ready-made parod ready-reckoner cyfrifydd parod ready-reckoners cyfrifydd parod ready-to-assemble furniture dodrefn parod i'w cydosod reafforestation ailgoedwigo reagent adweithydd reagents adweithydd real gwir (in general) real real (in mathematics) real book llyfr dewis real books llyfr dewis real capital gwir gyfalaf real capitals gwir gyfalaf real depth gwir ddyfnder real depths gwir ddyfnder real estate eiddo tiriog real estates eiddo tiriog real fugue ffiwg wir real fugues ffiwg wir real gas nwy real real image delwedd real real images delwedd real real number rhif real real numbers rhif real real part rhan real real parts rhan real real time amser real real time clock cloc amser real real time clocks cloc amser real real time processing prosesu amser real real times amser real real value gwerth real real values gwerth real real variable newidyn real real variables newidyn real real world byd go iawn real worlds byd go iawn realised niche cilfach wedi'i chyflawni realised niches cilfach wedi'i chyflawni realism realaeth realisms realaeth realistic realistig reality realiti reality orientation atgoffa o realaeth reality television teledu realaeth reality televisions teledu realaeth realization of a plan gwireddu cynllun reallocate ailddyrannu realm teyrnas realms teyrnas ream rîm reamer agorell reamers agorell reaming agorellu reams rîm reappraisal ailwerthusiad reappraisals ailwerthusiad rear access ôl-fynedfa rear projection ôl-dafluniau (of backdrop) rear projection ôl-daflunio (act of) rear suspension hongiad ôl rear suspensions hongiad ôl rear-admiral dirprwy lyngesydd rear-admirals dirprwy lyngesydd rearguard action ymladd i gadw'r cefn rearrangement reaction adwaith ad-drefnu rearrangement reactions adwaith ad-drefnu reason rhesymu reasonable rhesymol reasonable foreseeability rhagweladwyaeth resymol reasonable to foresee rhesymol i ragweld reasonableness rhesymolrwydd reasonably dust-proof yn weddol rydd o lwch reassurance cysur reassurances cysur reassure tawelu meddwl rebate ad-daliad rebates ad-daliad rebec rebec rebecs rebec rebel gwrthryfelwr rebellion gwrthryfel rebellions gwrthryfel rebellious gwrthryfelgar rebels gwrthryfelwr rebind ailrwymo rebound adlam rebound adlamu rebounds adlam rebuild ailadeiladu recall galw i gof recall musical patterns galw i gof batrymau cerddorol recant gwadu recantation gwadiad recantations gwadiad recede encilio receding colour lliw enciliol receding colours lliw enciliol receipt derbynneb receipts derbynneb receive derbyn receive into membership derbyn yn aelod receive poor relief byw ar y plwyf receiver derbynnydd receiver rhysyfwr (feudal) receivers derbynnydd receivers rhysyfwr (feudal) recent incomer hwyrddyfodiad recent incomers hwyrddyfodiad recentred projection tafluniad atganolog recentred projections tafluniad atganolog receptacle cynheilydd (flower) receptacle llestr receptacles cynheilydd (flower) receptacles llestr reception derbynfa (of place) reception derbyniad (act of, formal occasion) receptionist croesawydd receptionists croesawydd receptions derbynfa (of place) receptions derbyniad (act of, formal occasion) receptor derbynnydd receptors derbynnydd recess cilan (drill part) recess cilannu recess cilfach (in a wall etc) recessed cilannog recessed joint uniad cilannog recessed joints uniad cilannog recessed lighting golau cilannog recessed lightings golau cilannog recessed window ffenestr gilannog recessed windows ffenestr gilannog recessing rhigoli (of lathe tools) recession dirwasgiad (economical) recession enciliad (geographical etc) recessional moraine marian enciliol recessional moraines marian enciliol recessions dirwasgiad (economical) recessions enciliad (geographical etc) recessive enciliol recessive attribute priodwedd enciliol recessive attributes priodwedd enciliol recessive factor ffactor enciliol recessive factors ffactor enciliol rechargeable ailwefradwy recheck ailwirio recipe rysáit recipes rysáit reciprocal cilydd (in mathematics) reciprocal cilyddol (in mathematics) reciprocal dwyochrog (in general) reciprocal arrangement telerau cytbwys reciprocals cilydd (in mathematics) reciprocate cilyddu (in mathematics) reciprocating motion mudiant cilyddol reciprocating motions mudiant cilyddol reciprocity dwyochredd recirculate ailgylchredeg recirculating cooker hood lwfer ailgylchredol recirculating cooker hoods lwfer ailgylchredol recital datganiad recitals datganiad reciting note adroddnod reciting notes adroddnod reclaim adennill recluse meudwy recluses meudwy recognition adnabyddiad (=identification) recognition cydnabyddiaeth (=acknowledgement) recognitions adnabyddiad (=identification) recognitions cydnabyddiaeth (=acknowledgement) recognizance ymrwymiad recognizances ymrwymiad recognize adnabod (=identify) recognize cydnabod (=accept, admit) recognized form ffurf gydnabyddedig recognized forms ffurf gydnabyddedig recognized standard safon gydnabyddedig recognized standards safon gydnabyddedig recognized stroke strôc gydnabyddedig recognized strokes strôc gydnabyddedig recognized version fersiwn cydnabyddedig recognized versions fersiwn cydnabyddedig recoil adlam recoil adlamu recoils adlam recombination ailgyfuniad recombinations ailgyfuniad recommend argymell (=advise as a course of action) recommend cymeradwyo (=commend) recommendation argymhelliad (=advice) recommendation cymeradwyaeth (=commendation) recommendations argymhelliad (=advice) recommendations cymeradwyaeth (=commendation) recommended daily allowance lwfans beunyddiol argymelledig (food etc) recommended daily allowances lwfans beunyddiol argymelledig (food etc) recommended daily amount maint beunyddiol argymelledig (of a nutrient) recommended daily amounts maint beunyddiol argymelledig (of a nutrient) reconcile cysoni (facts) reconciliation cymod reconciliations cymod recondition adnewyddu reconnaissance archwiliad strategol reconnaissances archwiliad strategol reconnoitre archwilio strategol reconsider ailystyried reconstruct ail-lunio (=recreate) reconstruct ailadeiladu (=rebuild) reconstruction ail-luniad reconstructions ail-luniad reconstructive memory cof ailadeiladol record cofnod (=evidence or information) record cofnodi (evidence etc on paper, computer etc) record record (=best attempt) record record (=plastic disc carrying recorded sound) record recordio (music etc on disc) record card cerdyn cofnod record cards cerdyn cofnod record count cyfrif cofnodion record format fformat cofnod record formats fformat cofnod record keeping cadw cofnodion record length hyd cofnod record lengths hyd cofnod record of achievement cofnod cyrhaeddiad record office archifdy record offices archifdy record phenomena cofnodi ffenomenau record sheet taflen gofnodi record sheets taflen gofnodi record-structured database cronfa ddata cofnod-strwythuredig record-structured databases cronfa ddata cofnod-strwythuredig recorder cofiadur (=type of judge) recorder cofnodwr (=keeper of records) recorder recorder (=wind instrument) recorder recordydd (=machine for recording) recorders cofiadur (=type of judge) recorders cofnodwr (=keeper of records) recorders recorder (=wind instrument) recorders recordydd (=machine for recording) recording recordiad recording equipment offer recordio recording head pen recordio recording heads pen recordio recording station gorsaf gofnodi recording stations gorsaf gofnodi recording surface arwyneb recordio recording surfaces arwyneb recordio recordings recordiad records cofnod (=evidence or information) records record (=best attempt) records record (=plastic disc carrying recorded sound) recoup adennill recover adfer recoverable adferadwy recovery adferiad recovery order gorchymyn adfer recovery orders gorchymyn adfer recovery position ystum adferol recovery positions ystum adferol recovery rate cyfradd adfer recovery rates cyfradd adfer recreation adloniant recreational activity gweithgaredd adloniadol recreational drug cyffur adloniant recreational drugs cyffur adloniant recreational facilities cyfleusterau adloniadol recreations adloniant recriminate gwrthgyhuddo recruit recriwt recruit recriwtio recruitment method dull recriwtio recruitment methods dull recriwtio recruitment system system recriwtio recruitment systems system recriwtio recruits recriwt recrystallization ailgrisialiad recrystallizations ailgrisialiad recrystallize ailgrisialu rectangle petryal rectangle method dull petryal rectangle methods dull petryal rectangles petryal rectangular petryal rectangular Cartesian coordinates cyfesurynnau Cartesaidd petryal rectangular channel sianel betryal rectangular channels sianel betryal rectangular die dei petryal rectangular dies dei petryal rectangular duct dwythell betryal rectangular ducts dwythell betryal rectangular end pen petryal rectangular ends pen petryal rectangular hyperbola hyperbola petryal rectangular hyperbolas hyperbola petryal rectangular key allwedd betryal rectangular matrix matrics petryal rectangular matrixes matrics petryal rectangular prism prism petryal rectangular prisms prism petryal rectangular section material defnydd trychiad petryal rectangular section materials defnydd trychiad petryal rectangular solid solid petryal rectangular solids solid petryal rectangular table bwrdd petryal rectangular tables bwrdd petryal rectification unioniad rectifications unioniad rectified spirit gwirod coeth rectified spirits gwirod coeth rectifier unionydd (of electric current) rectifiers unionydd (of electric current) rectify unioni rectilinear unionlin rectilinear coordinate cyfesuryn unionlin rectilinear coordinate ordinate cyfesuryn unionlin mesuryn rectilinear coordinate ordinates cyfesuryn unionlin mesuryn rectilinear coordinates cyfesuryn unionlin rectilinear figure ffigur unionlin rectilinear figures ffigur unionlin rectilinear motion mudiant unionlin rectilinear motions mudiant unionlin rector rheithor rectorate rheithoriaeth rectorates rheithoriaeth rectors rheithor rectory rheithordy rectum rectwm rectums rectwm recumbent gorweddol recumbent fold plyg gorweddol recumbent folds plyg gorweddol recurrance dychweliad recurrances dychweliad recurring cylchol recurring decimal degolyn cylchol recurring decimals degolyn cylchol recursion dychweliad recursions dychweliad recursive dychweliadol recursive algorithm algorithm dychweliadol recursive algorithms algorithm dychweliadol recurved atro recusancy reciwsantiaeth recusancy list rhestr reciwsantiaid recusancy lists rhestr reciwsantiaid recusancy rolls rholiau reciwsantiaid recusant reciwsant recusants reciwsant recycle ailgylchu recycling of rocks ailgylchu creigiau red coch (enamelling colour) red blood cell cell goch y gwaed red blood cell count cyfrifiad celloedd coch y gwaed red blood cell counts cyfrifiad celloedd coch y gwaed red blood cells cell goch y gwaed red blood corpuscle corffilyn coch y gwaed red blood corpuscle count cyfrifiad corffilod coch y gwaed red blood corpuscle counts cyfrifiad corffilod coch y gwaed red blood corpuscles corffilyn coch y gwaed red cell ghost gweddillyn corffilyn coch red cell ghosts gweddillyn corffilyn coch red clay clai coch red earth pridd coch red earths pridd coch red heat gwres coch red heats gwres coch red hot poethgoch red kidney beans ffa coch red ochre ocr coch red ochres ocr coch red sable sabl coch red sable brush brwsh sabl coch red sable brushs brwsh sabl coch red sables sabl coch red shift rhuddiad red shifts rhuddiad reddish cochlyd redefine ailddiffinio redemption achubiaeth redemptions achubiaeth redistribute ailddosbarthu redoubt amddiffynfa allanol redoubts amddiffynfa allanol redox rhydocs redox process proses rhydocs redoxes rhydocs reduce cwtogi (=curtail) reduce darostwng (=subdue) reduce gostwng (price, temperature) reduce lleihau (=make smaller) reduce rhydwytho (in chemistry) reduce teneuo (=thin) reduce a pattern lleihau patrwm reduce bulk lleihau swmp reduced goods nwyddau pris gostyngol reduced level lefel seiliedig (in physics) reduced levels lefel seiliedig (in physics) reduced mass màs gostyngol reduced pressure gwasgedd gostyngol reduced pressures gwasgedd gostyngol reduced price pris gostyngol reduced prices pris gostyngol reduced size maint llai reduced sizes maint llai reducible gostyngadwy reducing agent rhydwythydd reducing agents rhydwythydd reducing medium cyfrwng teneuo (thinners) reducing mediums cyfrwng teneuo (thinners) reduction gostyngiad (in price, temperature) reduction lleihad (in numbers) reduction rhydwythiad (in chemistry) reduction box blwch gostyngiad reduction boxes blwch gostyngiad reduction division ymraniad lleihaol reduction divisions ymraniad lleihaol reductionist lleihaol reductions gostyngiad (in price, temperature) reductions lleihad (in numbers) reductions rhydwythiad (in chemistry) redundancy colli gwaith redundancy check gwiriad afreidrwydd redundancy checks gwiriad afreidrwydd redundancy pay tâl colli gwaith redundant di-waith (=unemployed) redundant diangen (=not needed) redwoods coedydd coch reed brwynen (in wind instruments) reed corsen (=type of plant) reed hook bach corsen reed hooks bach corsen reed organ organ gyrs reed organs organ gyrs reed pen pen corsen reed pens pen corsen reeding corsenwaith reedings corsenwaith reeds brwynen (in wind instruments) reeds corsen (=type of plant) reef creigres reef riff reefing riffio (the sail) reefs creigres reefs riff reel ril reels ril reeve maer (=manorial supervisor) reeve prif ynad (=chief magistrate) reeves maer (=manorial supervisor) reeves prif ynad (=chief magistrate) refectory ffreutur refectory table bwrdd ffreutur refectory tables bwrdd ffreutur refer cyfeirio referee canolwr (for references) referee dyfarnwr (male, in sport) referee dyfarnwraig (female, in sport) referee's book llyfr bach referee's books llyfr bach referees canolwr (for references) referees dyfarnwr (male, in sport) referees dyfarnwraig (female, in sport) reference cyfeiriad (in book) reference cyfeirnod (mark or number) reference geirda (=testimonial) reference book cyfeirlyfr reference books cyfeirlyfr reference drawing lluniad cyfeirio reference drawings lluniad cyfeirio reference plane plân cyfeirnod reference planes plân cyfeirnod reference section adran gyfeirio reference sections adran gyfeirio references cyfeiriad (in book) references cyfeirnod (mark or number) references geirda (=testimonial) referendum refferendwm referendums refferendwm referral cyfeiriad referral procedures trefn gyfeirio referrals cyfeiriad referred pain poen allgyfeiriol referred pains poen allgyfeiriol refill adlenwad refill adlenwi refills adlenwad refine coethi (metal, sugar) refine puro (oil) refine technique gwella perfformiad refined coeth (of metal, sugar) refined linseed oil olew had llin puredig refined linseed oils olew had llin puredig refined oil olew puredig refined oils olew puredig refined sugar siwgr coeth refined sugars siwgr coeth refinement coethder refinements coethder refinery purfa reflation atchwyddiant reflations atchwyddiant reflect adlewyrchu (light) reflect ystyried (=consider) reflected adlewyrch (light, sound wave) reflected adlewyrchedig reflected colour lliw adlewyrchedig reflected colours lliw adlewyrchedig reflected light golau adlewyrchedig reflected lights golau adlewyrchedig reflection adlewyrchiad reflection in a line adlewyrchiad mewn llinell reflections adlewyrchiad reflective practitioner ymarferwr adfyfyriol reflective practitioners ymarferwr adfyfyriol reflective symmetry cymesuredd adlewyrchiad reflector adlewyrchydd reflectors adlewyrchydd reflex atgyrch reflex atgyrchol reflex action gweithred atgyrch reflex actions gweithred atgyrch reflex angle ongl atblyg reflex angles ongl atblyg reflex arc llwybr atgyrch reflex arcs llwybr atgyrch reflexes atgyrch reflexive relation perthynas ymatblyg reflexive relations perthynas ymatblyg reflux adlifiad reflux adlifo reflux adlifol reflux condenser cyddwysydd adlifol reflux condensers cyddwysydd adlifol refluxes adlifiad refoot troedio reform ailffurfio (=form again) reform diwygiad reform diwygio (=improve) reformation diwygiad reformations diwygiad reformatory ysgol benyd reformed diwygiedig reformer diwygiwr reformers diwygiwr reforms diwygiad refract plygu (light) refracted plyg (light, sound wave) refracted angle ongl blygiant refracted angles ongl blygiant refracted light golau plyg refracted lights golau plyg refraction plygiant refractions plygiant refractive index indecs plygiant refractive indexes indecs plygiant refractivity plygiannedd refractometer reffractomedr refractometers reffractomedr refractory gwrthsafol (of substance) refractory brick bricsen wrthsafol refractory bricks bricsen wrthsafol refractory lining leinin gwrthsafol refractory linings leinin gwrthsafol refractory period cyfnod diddigwydd (of nerve) refractory periods cyfnod diddigwydd (of nerve) refractory priest offeiriad gwrthnysig refractory priests offeiriad gwrthnysig refrain byrdwn refrains byrdwn refresh rate cyfradd adnewyddu refresh rates cyfradd adnewyddu refrigerant rhewydd refrigerants rhewydd refrigerate rheweiddio refrigerated rheweiddiedig refrigeration rheweiddiad refrigeration ship llong rewi refrigeration ships llong rewi refrigerations rheweiddiad refrigerator oergell refrigerators oergell refuge village pentref noddfa refuge villages pentref noddfa refugee ffoadur refugee camp gwersyll ffoaduriaid refugee camps gwersyll ffoaduriaid refugee centre canolfan ffoaduriaid refugee centres canolfan ffoaduriaid refugees ffoadur refund ad-daliad refund ad-dalu refunds ad-daliad refuse sbwriel refuse bin bin sbwriel refuse bins bin sbwriel refuse collector casglwr sbwriel refuse collectors casglwr sbwriel refuse disposal gwaredu sbwriel refuse tip tomen sbwriel refuse tips tomen sbwriel refuses sbwriel refute gwrthbrofi regain adennill regain balance adennill cydbwysedd regain the ball adennill y bêl regal brenhinol regal organ rigol regalia regalia regalian teyrnaidd regalian rights hawliau teyrnaidd regalias regalia regality breninoldeb regals organ rigol regelation adrewiad regelations adrewiad regency rhaglywiaeth regency council cyngor rhaglywiaeth regency councils cyngor rhaglywiaeth regenerate atffurfio (tissue etc) regenerated atgynyrchiedig regenerated fibre ffibr atgynyrchiedig regenerated fibres ffibr atgynyrchiedig regeneration atffurfiant (e.g. organ) regenerations atffurfiant (e.g. organ) regent rhaglyw regents rhaglyw regicide teyrnladdiad (crime) regicide teyrnleiddiad (of person) regicides teyrnladdiad (crime) regicides teyrnleiddiad (of person) regime cyfundrefn (in politics) regime patrymedd (in physics) regiment catrawd regiments catrawd regimes cyfundrefn (in politics) regimes patrymedd (in physics) region ardal (in music) region rhanbarth (geographical) region of space rhanbarth gofod regional rhanbarthol regional airport maes awyr rhanbarthol regional airports maes awyr rhanbarthol regional level lefel ranbarthol regional levels lefel ranbarthol regional tourist board bwrdd croeso rhanbarthol regional tourist boards bwrdd croeso rhanbarthol regional variety amrywiaeth ranbarthol regionalism rhanbarthiaeth regionalisms rhanbarthiaeth regions ardal (in music) regions rhanbarth (geographical) register cofrestr (book or database etc) register cofrestru register cywair (of language) register iawn luniad (printing) register stop (=device controlling organ pipes) registered child minder gwarchodwr plant cofrestredig registered child minders gwarchodwr plant cofrestredig registered general nurse nyrs gofrestredig gyffredinol registered general nurses nyrs gofrestredig gyffredinol registered nursery meithrinfa drwyddedig registered office swyddfa gofrestredig registered offices swyddfa gofrestredig registers cofrestr (book or database etc) registers cywair (of language) registers iawn luniad (printing) registers stop (=device controlling organ pipes) registrar cofrestrydd registrars cofrestrydd registration cofrestriad registration fee tâl cofrestru registration fees tâl cofrestru registrations cofrestriad registry cofrestrfa regolith creicaen (=mantle rock) regoliths creicaen (=mantle rock) regrade ailraddio regress atchwelyd regression atchweliad regression analysis dadansoddiad atchwel regression line llinell atchwel regression lines llinell atchwel regression model model atchwel regression models model atchwel regression technique techneg atchwel regression techniques techneg atchwel regressions atchweliad regressive tax treth atchwel regressive taxes treth atchwel regular rheolaidd regular canon canon rheolaidd regular canons canon rheolaidd regular clergy clerigaeth reolaidd regular cleric clerigwr rheolaidd regular clerics clerigwr rheolaidd regular prism prism rheolaidd regular prisms prism rheolaidd regular solid solid rheolaidd regular solids solid rheolaidd regular value gwerth rheolaidd regular values gwerth rheolaidd regularity rheoleidd-dra regulate rheoli regulation rheoliad regulations rheoliad regulator rheolydd regulators rheolydd regur regur regurgitation ailchwydiad regurgitations ailchwydiad regurs regur rehabilitate ailsefydlu rehabilitation adferiad rehabilitation centre canolfan adfer rehabilitation centres canolfan adfer rehabilitations adferiad rehearsal ymarfer rehearsal technique techneg ymarfer rehearsal techniques techneg ymarfer rehearsals ymarfer rehearse ymarfer reheat aildwymo reign teyrnasiad reigns teyrnasiad reincarnation ailymgnawdoliad reincarnations ailymgnawdoliad reindeer carw Llychlyn reindeer moss mwsogl carw reindeers carw Llychlyn reinforce atgyfnerthu reinforced concrete concrit cyfnerth reinforced concretes concrit cyfnerth reinforced corner cornel gyfnerth reinforced corners cornel gyfnerth reinforced heel sawdl gaerog reinforced heels sawdl gaerog reinforcement atgyfnerthiad reinforcements atgyfnerthiad reinforcing square sgwâr cryfhau reinforcing squares sgwâr cryfhau reiterated notes nodau mynych reject gwrthod rejection gwrthodiad rejection ratio cymhareb wrthod rejections gwrthodiad rejector circuit cylched wrthod rejector circuits cylched wrthod rejoin ailuno rejoinder gwrthateb rejoinders gwrthateb rejuvenate adnewyddu rejuvenated adnewyddedig relate perthnasu related perthynol related concepts cysyniadau cysylltiedig related shapes ffurfiau perthynol relation cysylltiad (=connection) relational perthynol relational database cronfa ddata berthynol relational databases cronfa ddata berthynol relations cysylltiad (=connection) relationship perthynas relationships perthynas relative cymharol (=comparative) relative perthynol (=related) relative abundance digonedd cymharol relative abundances digonedd cymharol relative addressing cyfeirio perthynol relative atomic mass màs atomig cymharol relative density dwysedd cymharol relative dimensions dimensiynau perthynol relative flatness gwastadrwydd cymharol relative humidity lleithder cymharol relative key cywair perthynol relative major cywair perthynol mwyaf relative major scale graddfa berthynol fwyaf relative major scales graddfa berthynol fwyaf relative majors cywair perthynol mwyaf relative minor cywair perthynol lleiaf relative minor scale graddfa berthynol leiaf relative minor scales graddfa berthynol leiaf relative minors cywair perthynol lleiaf relative molecular mass màs moleciwlaidd cymharol relative permeability athreiddedd perthynol relative pitch traw perthynol relative pitches traw perthynol relative price pris cymharol relative prices pris cymharol relative proportions cyfrannau cymharol relative velocity cyflymder perthynol relativism perthynoliaeth relativisms perthynoliaeth relativistic perthnaseddol relativity perthnasedd relax llaesu (a muscle) relax ymlacio (oneself) relaxation oscillator osgiliadur llaciad relaxation oscillators osgiliadur llaciad relaxed wedi ymlacio (in general) relaxed yn llaes ac yn llac (of muscle) relay ras gyfnewid (race) relay relái (in electronics) release rhyddhau release agent cyfrwng rhyddhau release agents cyfrwng rhyddhau release and rescue rhyddhau ac achub release key rhyddhäwr release valve falf ryddhau release valves falf ryddhau relevance perthnasedd relevances perthnasedd relevant perthnasol relevant legislation deddfwriaeth berthnasol relevant legislations deddfwriaeth berthnasol relevant parts rhannau perthnasol relevant safety procedure trefn diogelwch perthnasol relevant safety procedures trefn diogelwch perthnasol reliability dibynadwyedd reliable dibynadwy reliable supply cyflenwad dibynadwy reliable supply of energy cyflenwad dibynadwy o egni relic crair relics crair relict landscape tirwedd greiriol relict landscapes tirwedd greiriol relict structure adeiledd creiriol relict structures adeiledd creiriol relief cerfwedd (sculpture) relief cerfweddol (on design) relief cymorth (income tax) relief dirwy etifedd (fine) relief gollyngdod (from pain etc) relief gostyngiad (in economics) relief rhyddhad (=freedom) relief tirwedd (of land) relief carving cerfiad cerfwedd relief carvings cerfiad cerfwedd relief engraving ysgythriad cerfwedd relief engravings ysgythriad cerfwedd relief etching ysgythru cerfweddol relief feature nodwedd tirwedd relief features nodwedd tirwedd relief map map tirwedd relief maps map tirwedd relief mould mowld cerfwedd relief moulds mowld cerfwedd relief road ffordd liniaru relief roads ffordd liniaru relief sculpture cerflunwaith cerfweddol relief sculptures cerflunwaith cerfweddol reliefs cerfwedd (sculpture) reliefs cymorth (income tax) reliefs dirwy etifedd (fine) reliefs gollyngdod (from pain etc) reliefs gostyngiad (in economics) reliefs rhyddhad (=freedom) reliefs tirwedd (of land) relieve lliniaru (symptoms etc) religion crefydd religions crefydd religiosity crefyddoldeb religious crefyddol religious character of a school cymeriad crefyddol ysgol religious commitment ymrwymiad crefyddol religious commitments ymrwymiad crefyddol religious concept cysyniad crefyddol religious concepts cysyniad crefyddol religious conversion tröedigaeth grefyddol religious conversions tröedigaeth grefyddol religious denomination enwad crefyddol religious denominations enwad crefyddol religious education addysg grefyddol religious educations addysg grefyddol religious experience profiad crefyddol religious experiences profiad crefyddol religious freedom rhyddid crefyddol religious freedoms rhyddid crefyddol religious group grŵp crefydd religious groups grŵp crefydd religious house tŷ crefydd religious houses tŷ crefydd religious intolerance anoddefgarwch crefyddol religious intolerances anoddefgarwch crefyddol religious language iaith grefyddol religious languages iaith grefyddol religious leader arweinydd crefyddol religious leaders arweinydd crefyddol religious order urdd grefyddol religious orders urdd grefyddol religious revival diwygiad crefyddol religious revivals diwygiad crefyddol religious song cân grefyddol religious songs cân grefyddol religious teacher athrawes crefydd (female) religious teacher athro crefydd (male) religious teachers athrawes crefydd (female) religious teachers athro crefydd (male) religious teaching dysgeidiaeth grefyddol religious teachings dysgeidiaeth grefyddol religious tradition traddodiad crefyddol religious traditions traddodiad crefyddol religious worship cydaddoli crefyddol reliquary creirfa relocatable adleoladwy relocate adleoli relocator adleolydd relocators adleolydd reluctance gwrthiant reluctances gwrthiant reluctant learner dysgwr amharod reluctant learners dysgwr amharod remainder gweddill remainder theorem theorem y gweddill remainder theorems theorem y gweddill remainders gweddill remand cadw yn y ddalfa (in custody) remand remand remand centre canolfan remand remand centres canolfan remand remand fostering scheme cynllun maethu remand remand fostering schemes cynllun maethu remand remands remand remark sylw remarks sylw remedial class dosbarth adfer remedial exercise ymarferiad adfer remedial exercises ymarferiad adfer remedial work gwaith adfer remedial works gwaith adfer remedy the fault cywiro'r diffyg remembrancer swyddog dyledion y Goron remembrancers swyddog dyledion y Goron reminiscence therapy therapi hel atgofion remission gwellhad dros dro remissions gwellhad dros dro remittance advice nodyn talu remittance advices nodyn talu remnant sbaryn remnants sbaryn remodel adlunio remonstrance gwrthdystiad remonstrances gwrthdystiad remonstrant haerwr remonstrants haerwr remonstrate gwrthdystio remote pell remote access cyrchiad pell remote console consol pell remote consoles consol pell remote control rheolaeth bell remote control panel panel pell-reoli remote control panels panel pell-reoli remote controls rheolaeth bell remote data station gorsaf ddata pell remote data stations gorsaf ddata pell remote data terminal terfynell ddata pell remote data terminals terfynell ddata pell remote debugging dadfygio pell remote enquiry ymholiad pell remote job entry mewnbynnu gorchwyl pell (RJE) remote processing prosesu pell remote testing profi pell remotely sensed data data a synhwyrir o bell removable symudadwy removal agent codydd staen removal agents codydd staen remove diddymu (=cancel) remove gwyriad (in music) remove symud (=move) remove brackets diddymu cromfachau remove fullness cael gwared â llawnder removes gwyriad (in music) renal arennol renal medicine meddygaeth arennau renal medicines meddygaeth arennau renal vein gwythïen arennol renal veins gwythïen arennol render rendrad (=sandy mixture) rendering datganiad (in music) rendering rendro (on wall) renderings datganiad (in music) renders rendrad (=sandy mixture) rendition datganiad renditions datganiad rendzina rendsina rendzinas rendsina renegade gwrthgiliwr renegades gwrthgiliwr renew adnewyddu renewable adnewyddadwy renewable energy egni adnewyddadwy renewable resource adnodd adnewyddadwy renewable resources adnodd adnewyddadwy renewable resources adnoddau adnewyddol renewal adnewyddiad renewals adnewyddiad rennin rennin rennins rennin renounce diarddel renovate adnewyddu renovation adnewyddiad renovations adnewyddiad rent rhent rent rhentu rent control rheolaeth rhent rent controls rheolaeth rhent rent of assize rhent aseis rent rebate ad-daliad rhent rent rebates ad-daliad rhent rent roll rhôl rhent rent rolls rhôl rhent rental rhent rentals rhent rentier rhentwr rentier class dosbarth rhentyddol rentiers rhentwr rents rhent reorientation ailgyfeiriadaeth reorientations ailgyfeiriadaeth repair atgyweiriad repair atgyweirio repair grant grant atgyweirio repair grants grant atgyweirio repair kit cit atgyweirio repair kits cit atgyweirio repairs atgyweiriad reparation iawndal reparations iawndal repatriate dychweledig repatriates dychweledig repay ad-dalu repayable ad-daladwy repayment ad-daliad repayments ad-daliad repeal diddymu repeal of the Corn Laws diddymu'r Deddfau Ŷd repeat ailadrodd repeat ailadroddiad repeat mark marc ailadrodd repeat marks marc ailadrodd repeat pattern patrwm ailadroddol repeat patterns patrwm ailadroddol repeats ailadroddiad repel gwrthyrru repel text gwrthyrru testun repertoire repertoire repertoire requirements gofynion repertoire repertoires repertoire repetition ailadroddiad repetitions ailadroddiad replace amnewid replacement amnewidyn replacement series cyfres amnewidiad replacements amnewidyn replay ailchwarae replay the point ailchwarae'r pwynt replica replica replicas replica replicate dyblygu replication dyblygiad replications dyblygiad replies and comments ymatebion a sylwadau report adrodd (formally) report adroddiad report rhoi gwybod (informally) report back adrodd yn ôl report generator generadur adroddiadau report generators generadur adroddiadau reports adroddiad reposition ail-leoli repository ystorfa repoussé repoussé (decorative processes) repoussé hammer morthwyl repoussé repoussé hammers morthwyl repoussé repoussé punch pwnsh repoussé repoussé punches pwnsh repoussé represent cynrychioli (in general) represent portreadu (=portray) represent a landscape cynrychioli tirlun representation cynrychiolaeth (of people) representation cynrychioliad (in mathematics) representation portread (=portrait) representation fraction ffracsiwn cynrychioliadol representation fractions ffracsiwn cynrychioliadol representation theorem theorem gynrychioliad representation theorems theorem gynrychioliad representational portreadol (=seeking to portray) representational art celfyddyd gynrychioliadol representational arts celfyddyd gynrychioliadol representations cynrychiolaeth (of people) representations cynrychioliad (in mathematics) representations portread (=portrait) representative cynrychiadol representative cynrychiolydd representative assembly cynulliad cynrychiadol representative fraction ffracsiwn cynrychiadol (R.F.) representative fractions ffracsiwn cynrychiadol (R.F.) representative sample sampl gynrychioliadol representative samples sampl gynrychioliadol representatives cynrychiolydd representing the past cynrychioli'r gorffennol repression ataliad (psychological) repression cynyrchluddiant (of enzyme etc) repression gormes (political) repressions ataliad (psychological) repressions cynyrchluddiant (of enzyme etc) repressions gormes (political) repressive gormesol (of regime) reprieve atal dienyddio (from capital punishment) reprisal dial reprisals dial reprise atbreis (historical) reprises atbreis (historical) reprocess ailbrosesu reproduce atgenhedlu (sexually) reproduce atgynhyrchu (in general) reproducer dyblygydd (in computing) reproducers dyblygydd (in computing) reproduction atgenhedliad (sexual) reproduction atgynhyrchiad (in general) reproductions atgenhedliad (sexual) reproductions atgynhyrchiad (in general) reproductive organs organau atgenhedlu reproductive rate cyfradd atgenhedlu reproductive rates cyfradd atgenhedlu reproductive system system genhedlu reproductive systems system genhedlu reptile ymlusgiad reptiles ymlusgiad republic gweriniaeth republican gweriniaethol republican gweriniaethwr republicans gweriniaethwr republics gweriniaeth repulsion gwrthyriad repulsions gwrthyriad repulsive force grym gwrthyrru repulsive forces grym gwrthyrru request cais requests cais require gofyn required gofynnol required height uchder gofynnol required heights uchder gofynnol requirement gofyniad requirements gofyniad requisition archeb (=order) requisition meddiant gorfodol (=official claim on land or materials) requisitions archeb (=order) requisitions meddiant gorfodol (=official claim on land or materials) reredorter geudy reredorters geudy resale adwerthiant resale adwerthu resales adwerthiant rescue achub rescue equipment cyfarpar achub rescue equipments cyfarpar achub research ymchwil research and development ymchwil a datblygu research assistant cynorthwyydd ymchwil research assistants cynorthwyydd ymchwil research data data ymchwil research fellow cymrawd ymchwil research fellows cymrawd ymchwil research grant grant ymchwil research grants grant ymchwil research method dull ymchwil research methods dull ymchwil research objective amcan ymchwil research objectives amcan ymchwil research student myfyriwr ymchwil research students myfyriwr ymchwil researcher ymchwilydd researchers ymchwilydd researches ymchwil reselect ailddewis resemblance tebygrwydd resemblances tebygrwydd resequent adlif (stream) resequent stream ffrwd adlif resequent streams ffrwd adlif resequents adlif (stream) reservation tiriogaeth frodorol reservation fee ffi cadw reservation fees ffi cadw reservations tiriogaeth frodorol reservations manager rheolwr bwcio reservations managers rheolwr bwcio reservations staff staff bwcio reserve gwarchodfa (for nature) reserve neilltuo reserve storfa fwyd (of food) reserve player chwaraewr wrth gefn reserve players chwaraewr wrth gefn reserved word gair cadw reserved words gair cadw reserves cronfa wrth gefn (financial) reserves gwarchodfa (for nature) reserves milwyr wrth gefn (military) reserves storfa fwyd (of food) reservoir cronfa (in general) reservoir cronfa ddŵr (of water) reservoirs cronfa (in general) reservoirs cronfa ddŵr (of water) reset ailosod resettle ailgyfanheddu resettlement ailgyfanheddiad (of place) resettlement of offenders ailsefydlu troseddwyr resettlements ailgyfanheddiad (of place) reshuffle ad-drefnu residence annedd residences annedd resident preswyl resident preswyliwr resident alien estron preswyl resident aliens estron preswyl residential care gofal preswyl residential care home cartref gofal preswyl residential care homes cartref gofal preswyl residential cares gofal preswyl residential home cartref preswyl residential homes cartref preswyl residential social worker gweithiwr cymdeithasol preswyl residential social workers gweithiwr cymdeithasol preswyl residential zone cylchfa breswyl residential zones cylchfa breswyl residents preswyliwr residual gweddilleb (in mathematics) residual gweddillol residual air aer gweddillol residual airs aer gweddillol residual deposits dyddodion gweddillol residual hearing gweddill clyw residual hearings gweddill clyw residual vision gweddill golwg residual visions gweddill golwg residuals gweddilleb (in mathematics) residue gweddill residues gweddill resign ymddiswyddo resignation ymddiswyddiad resignations ymddiswyddiad resilient adlamol (of substance) resilient gwydn (of person) resin resin resin adhesive adlyn resin resin adhesives adlyn resin resin cored solder sodr plymwr resin cored solders sodr plymwr resin duct pibell ystôr resin ducts pibell ystôr resin glaze sglein resin resin glazes sglein resin resin glue glud resin resin glues glud resin resinous resinaidd resinous ground grwnd resinaidd resinous grounds grwnd resinaidd resins resin resist gwrthsefyll resist printing gwrthbrintio resistance gwrthiant (=hindering the conduction of electricity etc) resistance gwrthwynebiad (=refusal to comply) resistance gwydnwch (=ability to withstand adverse conditions) resistance movement mudiad gwrthwynebu resistance movements mudiad gwrthwynebu resistance to motion gwrthiant i'w fudiant resistance wire technique techneg gwrthiant gwifren resistance wire techniques techneg gwrthiant gwifren resistances gwrthiant (=hindering the conduction of electricity etc) resistances gwrthwynebiad (=refusal to comply) resistances gwydnwch (=ability to withstand adverse conditions) resistant gwrthiannol (to electricity etc) resistant gwydn (=tough) resistant materials defnyddiau gwrthiannol resistive circuit cylched gwrtheddol resistive circuits cylched gwrtheddol resistivity gwrthedd resistor gwrthydd resistors gwrthydd reslant ailogwyddo resolute cydran (=component) resolutes cydran (=component) resolution adferiad (of discord in music) resolution cydraniad (of vectors) resolution datrysyn (of resolving power in physics) resolution penderfyniad (=decision) resolutions adferiad (of discord in music) resolutions cydraniad (of vectors) resolutions datrysyn (of resolving power in physics) resolutions penderfyniad (=decision) resolve adfer (a discord) resolve cydrannu (vectors force, velocity etc) resolve datrys (problems) resolve a force into components cydrannu grym resolve horizontally cydrannu'n llorweddol resolve vertically cydrannu'n fertigol resolved cydrannol (of components) resolvent cydrennydd resolvent datrysol resolvent kernel cnewyllyn datrysol resolvent kernels cnewyllyn datrysol resolvents cydrennydd resonance cyseiniant resonance chord cord cyseinio resonance chords cord cyseinio resonance curve cromlin gyseinio resonance curves cromlin gyseinio resonances cyseiniant resonant cysain resonant cyseiniol resonant frequency amledd cysain resonants cysain resonate cyseinio resonator cyseinydd resonators cyseinydd resort area ardal wyliau resort areas ardal wyliau resource adnodd resource allocation formula fformiwla dyrannu adnoddau resource allocation formulas fformiwla dyrannu adnoddau resource centre canolfan adnoddau resource centres canolfan adnoddau resource folder ffolder adnoddau resource folders ffolder adnoddau resource implications goblygiadau adnoddol resource management rheoli adnoddau resource materials deunyddiau adnoddau resource partitioning rhaniad adnoddau resource partitionings rhaniad adnoddau resource planning cynllunio adnoddau resource selection dewis adnoddau resources adnodd respectability parchusrwydd respective priodol respectively yn ôl eu trefn respiration resbiradaeth respirations resbiradaeth respirator peiriant anadlu respirators peiriant anadlu respiratory resbiradol respiratory device dyfais resbiradol respiratory devices dyfais resbiradol respiratory gas nwy resbiradol respiratory quotient cyniferydd resbiradol (R.Q.) respiratory quotients cyniferydd resbiradol (R.Q.) respiratory surface arwyneb resbiradol respiratory surfaces arwyneb resbiradol respiratory system system resbiradaeth respiratory system system resbiradol respiratory systems system resbiradaeth respiratory systems system resbiradol respire resbiradu respite seibiant respite care gofal seibiant respite cares gofal seibiant respites seibiant respond ymateb respond readily ymateb yn barod responsa responsa response ymateb response curve cromlin ymateb response curves cromlin ymateb response time amser ymateb response times amser ymateb response to set tasks ymateb i dasgau responses ymateb responsibility cyfrifoldeb responsible government llywodraeth gyfrifol responsible governments llywodraeth gyfrifol rest cynhaliwr (=support or prop) rest disymudedd (=non movement in physics) rest gorffwys (=repose) rest saib (=musical silence) rest in water gorffwys yn y dŵr rest mass màs disymudedd rest sign tawnod rest signs tawnod rest stroke symudiad gorffwysol rest strokes symudiad gorffwysol rest-stick ffon peintiwr rest-sticks ffon peintiwr restaurant tŷ bwyta restaurant manager rheolwr y tŷ bwyta restaurant managers rheolwr y tŷ bwyta restaurants tŷ bwyta resting pin gorffwysbin (on harp) resting pins gorffwysbin (on harp) restitute adfer restitution adferiad restitutions adferiad restless aflonydd restoration adferiad restorations adferiad restore adfer (in general) restore damaged environments adfer amgylcheddau sydd wedi'u difrodi restoring force grym adferol restoring forces grym adferol restrain atal restraining circle cylch atal restraining circles cylch atal restraint ataliad (of trade etc) restraints ataliad (of trade etc) restrict cyfyngu restriction cyfyngiad restrictions cyfyngiad restrictive practice arfer cyfyngol restrictive practices arfer cyfyngol restrictive practices court llys arferion cyfyngol restrictive practices courts llys arferion cyfyngol rests cynhaliwr (=support or prop) rests disymudedd (=non movement in physics) rests saib (=musical silence) result canlyniad result register cofrestr ganlyniadau result registers cofrestr ganlyniadau resultant force grym cydeffaith resultant forces grym cydeffaith resultant tone cyfundon resultant tones cyfundon resulting canlynol results canlyniad resurface brigo i'r wyneb (of ideas etc) resurrection atgyfodiad resurrections atgyfodiad resuscitate adfywio retable ysgafell (ledge) retables ysgafell (ledge) retail adwerthol (in finance) retail adwerthu retail and distributive service gwasanaeth adwerthu a dosbarthu retail and distributive services gwasanaeth adwerthu a dosbarthu retail market marchnad adwerthu retail markets marchnad adwerthu retail outlet allfa adwerthu retail outlets allfa adwerthu retail price index mynegai nwyddau adwerthu retail price indexes mynegai nwyddau adwerthu retail psychology seicoleg adwerthu retail services gwasanaethau adwerthu retail trade masnach adwerthu retail trades masnach adwerthu retailer adwerthwr retailers adwerthwr retain dargadw (in biology) retain its shape cadw'i siâp retainer daliedydd (of land) retainer gŵr ar gadw (of person) retainer tâl ar gadw (fee) retainers daliedydd (of land) retainers gŵr ar gadw (of person) retainers tâl ar gadw (fee) retaliatory tariff toll ddial retaliatory tariffs toll ddial retard arafu retardation arafiad (of tides etc) retardation arafwch (of mind) retardation gohiriad (in music) retardations arafiad (of tides etc) retardations arafwch (of mind) retardations gohiriad (in music) retarded araf retarder arafwr retarders arafwr retching cyfogi gwag retention dargadwedd (e.g. of iron by the tissues) retention of urine ataliad dŵr retentions dargadwedd (e.g. of iron by the tissues) reticulate rhwydol reticulocyte reticwlocyt reticulocytes reticwlocyt reticuloendothelial system system reticwloendothelaidd reticuloendothelial systems system reticwloendothelaidd reticulum reticwlwm reticulums reticwlwm retina retina retinas retina retinue gosgordd retinues gosgordd retire cilio (from a place) retire ymddeol (from work) retire injured gadael oherwydd anaf retirement ymddeoliad retirement benefit budd-dal ymddeol retirement benefits budd-dal ymddeol retirements ymddeoliad retort retort retort stand stand retort retort stands stand retort retorts retort retouch atgyffwrdd retreat encil (place or period) retreat enciliad (=act of retreating) retreat encilio retreats encil (place or period) retreats enciliad (=act of retreating) retrievable adalwadwy retrieve adalw retrieve information adalw gwybodaeth retrieve work adalw gwaith retrogradable olraddadwy retrogradation olraddiad retrogradations olraddiad retrograde olrediad (movement) retrograde canon canon ôl-redol retrograde canons canon ôl-redol retrogrades olrediad (movement) retrospective legislation deddfwriaeth ôl-weithredol retrospective legislations deddfwriaeth ôl-weithredol return dychweliad return dychwelyd return address cyfeiriad dychwelyd return crease cris ochrol return creases cris ochrol return earnings adenillion return function ffwythiant adenillion return functions ffwythiant adenillion return key dychwelwr return on capital employed adenillion ar y cyfalaf a ddefnyddiwyd return on net assets adenillion ar asedau net return stroke strôc ddychwel return strokes strôc ddychwel returns dychweliad revaluation ailbrisiad revaluations ailbrisiad reveal dadlen reveal dadlennu reveals dadlen revelation datguddiad revelations datguddiad revenue cyllid (in general) revenue men gwŷr yr ecseis revenue support grant grant cynnal incwm revenue support grants grant cynnal incwm revenues cyllid (in general) reverberation datseinedd reverberation time amser datseinedd reverberation times amser datseinedd reverberations datseinedd reverberatory datseiniol reverberatory furnace ffwrnais adlewyrchol reverberatory furnaces ffwrnais adlewyrchol revers llabed revers collar coler llabed revers collars coler llabed reversal trawsosod (of letters, words) reverse cildroad (in computing etc) reverse cildroi (in computing etc) reverse gwrthdro (in general) reverse gwrthdroi (in general) reverse a pattern cildroi patrwm reverse arc cilarc reverse arcs cilarc reverse astride vault llofnaid ar led wysg y cefn reverse astride vaults llofnaid ar led wysg y cefn reverse barrier nursing nyrsio rhwystrol gwrthol reverse bias bias yn ôl reverse control rheolydd cyflymder (of machine part) reverse controls rheolydd cyflymder (of machine part) reverse cycle gwrthdroi cylchred reverse horizontal astride vault llofnaid hir ar led wysg y cefn reverse horizontal astride vaults llofnaid hir ar led wysg y cefn reverse order trefn wrthdro reverse orders trefn wrthdro reverse paddling stroke strôc badlo'n ôl reverse paddling strokes strôc badlo'n ôl reverse pass pàs wrthol reverse pivot colyn ôl reverse pivots colyn ôl reverse side tu chwith reverse sides tu chwith reverse stick ffon wrthdro reverse stick dribble driblo gwrthdro reverse stick pass pàs wrthdro reverse sticks ffon wrthdro reversed cildro (in computing) reversed beam trawst o chwith reversed beams trawst o chwith reversed hanging hongian pen i lawr reversed stream nant gildro reversed streams nant gildro reverses cildroad (in computing etc) reverses gwrthdro (in general) reversibility cildroadedd reversible cildroadwy (in science) reversible dwyffordd (of garment) reversible garment dilledyn dwyffordd reversible garments dilledyn dwyffordd reversible reaction adwaith cildroadwy reversible reactions adwaith cildroadwy reversing motion mudiant tu chwith reversing motions mudiant tu chwith reversion cildroad reversions cildroad revert dychwelyd revetment gwrthglawdd revetments gwrthglawdd review adolygiad review adolygu review of results adolygu canlyniadau reviewer adolygydd reviewers adolygydd reviews adolygiad revise adolygu revise mode modd addasu revise modes modd addasu revisionism glastwreiddio revival diwygiad revivals diwygiad revocation dirymiad revocations dirymiad revoke dirymu revolt gwrthryfel revolts gwrthryfel revolution chwyldro (=overthrow of system) revolution cylchdro (of circular motion) revolution counter rhifydd cylchdroeon revolution counters rhifydd cylchdroeon revolutionary chwyldroadwr (of person) revolutionary settlement ardrefniant chwyldroadol revolutionary settlements ardrefniant chwyldroadol revolutions chwyldro (=overthrow of system) revolutions cylchdro (of circular motion) revolve cylchdroi revolving centre canol cylchdro revolving centres canol cylchdro revolving head pen cylchdro revolving heads pen cylchdro revolving hearth aelwyd dro revolving hearths aelwyd dro revolving stage llwyfan tro revolving stages llwyfan tro revs/min cylchdro'r funud revue rifíw revues rifíw rewind ailddirwyn rhenium rheniwm (Re) rheniums rheniwm (Re) rheostat rheostat rheostats rheostat rhesus factor ffactor rhesws rhesus factors ffactor rhesws rhesus negative rhesws negatif rhesus negatives rhesws negatif rhesus positive rhesws positif rhesus positives rhesws positif rhetorical question cwestiwn rhethregol rhetorical questions cwestiwn rhethregol rheumatic fever twymyn gwynegon rheumatic fevers twymyn gwynegon rheumatism gwynegon rheumatologist rhiwmatolegydd rheumatologists rhiwmatolegydd rheumatology rhiwmatoleg rhizobium rhisobiwm rhizobiums rhisobiwm rhizoid rhisoid rhizoids rhisoid rhizome rhisom rhizomes rhisom rhodium rhodiwm (Rh) rhodiums rhodiwm (Rh) rhodopsin rhodopsin rhodopsins rhodopsin rhomb rhomb rhombohedron rhombohedron rhombohedrons rhombohedron rhomboid rhomboid rhomboids rhomboid rhombs rhomb rhombus rhombws rhumb line rhymlin rhumb lines rhymlin rhyme rhigwm rhymes rhigwm rhyolite rhiolit rhyolites rhiolit rhyolitic rhiolitig rhythm rhythm rhythm pattern patrwm rhythm rhythm patterns patrwm rhythm rhythmic rhythmig rhythmic 'fun' music cerddoriaeth rythmig hwylgar rhythmic 'fun' musics cerddoriaeth rythmig hwylgar rhythmic accompaniment cyfeiliant rhythmig rhythmic accompaniments cyfeiliant rhythmig rhythmic cell cell rythmig rhythmic cells cell rythmig rhythmic jump naid rythmig rhythmic jumps naid rythmig rhythmic motion mudiant rhythmig (thread cutting) rhythmic motions mudiant rhythmig (thread cutting) rhythmic movement symudiad rhythmig rhythmic movements symudiad rhythmig rhythmic music cerddoriaeth rythmig rhythmic musics cerddoriaeth rythmig rhythmic response ymateb rhythmig rhythmic responses ymateb rhythmig rhythmic stimulus ysgogiad rhythmig rhythmically spoken word pattern patrwm geiriol wedi'i lefaru'n rhythmig rhythmically spoken word patterns patrwm geiriol wedi'i lefaru'n rhythmig rhythms rhythm ria ria rib asen rib cage cawell asennau rib cages cawell asennau rib weave gwehyddiad rhesog rib weaves gwehyddiad rhesog ribbed asennog (in general) ribbed rhesog (of weave) ribbed G cramp cramp G asennog ribbed G cramps cramp G asennog ribbon rhuban ribbon back chair cadair gefn rhuban ribbon back chairs cadair gefn rhuban ribbon development datblygiad hirgul ribbon developments datblygiad hirgul ribbon lake llyn hirgul ribbon lakes llyn hirgul ribbon settlement anheddiad hirgul ribbon settlements anheddiad hirgul ribbon-end scroll sgrôl pen rhuban ribbon-end scrolls sgrôl pen rhuban ribbons rhuban riboflavin ribofflafin riboflavins ribofflafin ribonucleic acid asid riboniwcleig ribonucleic acids asid riboniwcleig ribosome ribosom ribosomes ribosom rice paper papur reis rice papers papur reis rice stitch pwyth reis rice stitches pwyth reis ricercare ricercare ricercares ricercare rich bras (of food etc) rich cyfoethog richness cyfoeth rickets llech, y ricrac braid brêd ricrac ricrac braids brêd ricrac riddle rhidyll riddle rhidyllu riddles rhidyll rider atodeg riders atodeg ridge cefnen (of hilltop, barometric pressure) ridge crib (of roof or similar) ridge gwrym (of arable land) ridge and furrow relief tirwedd cefnen a rhych ridge and furrow reliefs tirwedd cefnen a rhych ridge board bwrdd crib ridge boards bwrdd crib ridge of high pressure cefnen o wasgedd uchel ridge tree nenbren ridge trees nenbren ridges cefnen (of hilltop, barometric pressure) ridges crib (of roof or similar) ridges gwrym (of arable land) ridges and swales cefnau a phantiau riffle riffl riffler rifflwr riffler file ffeil rifflwr riffler files ffeil rifflwr rifflers rifflwr riffles riffl rift agen (=slot, slit) rift hollt rift sawn llifiad rheiddiol (quarter sawn) rift sawns llifiad rheiddiol (quarter sawn) rift valley dyffryn hollt rifts agen (=slot, slit) rifts hollt rig llwyfan tyllu riggers rigeri rigging rigin riggings rigin right cywir (=correct) right de (as opposed to left) right hawl (=entitlement) right amount maint cywir right amounts maint cywir right angle ongl sgwâr right angles ongl sgwâr right arm bowler bowliwr braich dde right arm bowlers bowliwr braich dde right bank glan dde right bank tributary llednant glan dde right banks glan dde right circular cone côn crwn union right circular cones côn crwn union right court cwrt de right courts cwrt de right cross de draws right hand llaw dde right hands llaw dde right justify unioni ar y dde right of way hawl tramwy right outfielder maeswr de right outfielders maeswr de right prism prism union right prisms prism union right pyramid pyramid union right pyramids pyramid union right section toriad union right sections toriad union right shift syfliad de right shifts syfliad de right side ochr dde (as opposed to left side) right side ochr gywir (=correct side) right sides ochr dde (as opposed to left side) right sides ochr gywir (=correct side) right type math cywir right types math cywir right wing adain dde (in politics) right wing asgell dde (in sport) right wings adain dde (in politics) right wings asgell dde (in sport) right-angled sgwaronglog right-angled triangle triongl ongl sgwâr right-angled triangles triongl ongl sgwâr right-half hanerwr de right-halfs hanerwr de right-hand lock clo ochr dde right-hand locks clo ochr dde right-hand screw thread edau sgriw llaw dde right-hand screw threads edau sgriw llaw dde right-hand side ochr dde right-hand sides ochr dde right-hand thread edau llaw dde right-hand threads edau llaw dde right-hand turn tro de right-hand turns tro de right-handed batsman batiwr llaw dde right-handed batsmans batiwr llaw dde rights de (as opposed to left) rights hawl (=entitlement) rights iawnderau rights charter siarter hawliau rights charters siarter hawliau rigid anhyblyg rigid wire gwifren anhyblyg rigid wires gwifren anhyblyg rigidity anhyblygedd rigorous trwyadl rigorous justification cyfiawnhad trylwyr rigorous justifications cyfiawnhad trylwyr rigour manwl gywirdeb rigours manwl gywirdeb rill cornant rills cornant rim cantel (of drum) rim ymyl rim latch clicied ymyl rim latches clicied ymyl rim lock clo ymyl rim locks clo ymyl rindless bacon cig moch digrofen rindless bacons cig moch digrofen ring cylch (=circle) ring modrwy (on finger) ring and star dance dawns cylch a seren ring and star dances dawns cylch a seren ring gauge medrydd torch ring gauges medrydd torch ring headed pin pìn cylchog ring headed pins pìn cylchog ring nebula nifwl modrwy ring nebulas nifwl modrwy ring road cylchffordd ring roads cylchffordd ring shake hollt cylch ring shakes hollt cylch ring spanner sbaner cylch ring spanners sbaner cylch ring-binder ffeil fodrwy ring-binders ffeil fodrwy ringed cylchog rings cylch (=circle) rings modrwy (on finger) rings right and left cylchoedd bach i bedwar ringshank hoelen garan gylch ringshank tongs gefel garan gylch (casting) ringshanks hoelen garan gylch ringwork amddiffynfa gylch ringworks amddiffynfa gylch ringworm tarwden ringworms tarwden rinse rins rinse rinsio rinses rins riot terfysg riots terfysg rip current cerrynt terfol rip currents cerrynt terfol rip saw rhwyglif rip saws rhwyglif rip tide llanw terfol rip tides llanw terfol riparian torlannol ripieno ripieno riposte riposte ripostes riposte ripping fence ffens rwygo ripping fences ffens rwygo ripple crych (in general) ripple crychdon (small wave) ripple crychdonni ripple blanking output allbwn blancio crychdon (RBO) ripple blanking outputs allbwn blancio crychdon (RBO) ripple counter rhifydd crychdon ripple counters rhifydd crychdon ripple tank tanc crychdonni ripple tanks tanc crychdonni ripples crych (in general) ripples crychdon (small wave) risalah risalah risalahs risalah rise and fall table bwrdd codi a gostwng rise and fall tables bwrdd codi a gostwng rise of Prussia esgyniad Prwsia rise-and-fall light golau codi a gostwng rise-and-fall lights golau codi a gostwng riser codwr riser pin pìn codi riser pins pìn codi risers codwr rising gwrthryfel rising butt hinge colfach codi rising butt hinges colfach codi risings gwrthryfel risk mentro risk risg risk assessment asesiad risg risk assessments asesiad risg risks risg rite defod rite of passage defod newid byd rites defod ritornello ritornello ritual defod ritual defodol ritual myth myth defodol ritual myths myth defodol ritualism defodaeth ritualisms defodaeth rituals defod rival cydymgeisio rival cydymgeisydd rivalry cystadleuaeth rivals cydymgeisydd river afon river basin basn afonydd river basins basn afonydd river capture afonladrad river captures afonladrad river floods llifogydd afonydd river mist tarth river mists tarth river regime patrymedd afon river regimes patrymedd afon river system system afonydd river systems system afonydd river terrace cerlan river terraces cerlan river valley dyffryn afon riverine afonol riverlands afondiroedd rivers afon rivet rhybed rivet rhybedu rivet set set rybed rivet sets set rybed rivet snap snap rhybed rivet snaps snap rhybed riveted rhybedog riveted joint uniad rhybedog riveted joints uniad rhybedog riveted lap joint goruniad rhybedog riveted lap joints goruniad rhybedog riveted plate plât rhybedog riveted plates plât rhybedog riveted stay gwanas rhybedog riveting hammer morthwyl rhybedu riveting hammers morthwyl rhybedu rivets rhybed riving rhannu riving knife cyllell rannu (saw bench) riving knifes cyllell rannu (saw bench) rivulet afonig rivulets afonig road ffordd road construction adeiladu ffordd road fund licence trwydded modur road fund licences trwydded modur road junction cyffordd road junctions cyffordd road system rhwydwaith ffyrdd road systems rhwydwaith ffyrdd road traffic accident damwain ffordd road traffic accidents damwain ffordd road tunnel twnnel ffordd road tunnels twnnel ffordd road used as public path ffordd a ddefnyddir yn llwybr cyhoeddus road used as public paths ffordd a ddefnyddir yn llwybr cyhoeddus roads ffordd roads and paths ffyrdd a llwybrau roadstead angorle roadsteads angorle roaring forties deugeiniau gwyllt roaring twenties dauddegau gwyllt robber economy economi disbyddol robber industry diwydiant disbyddol robbery lladrad robe mantell robes mantell robot robot robotics roboteg robots robot roche moutonée craig follt roche moutonées craig follt rock craig rock basin lake llyn creicafn rock basin lakes llyn creicafn rock features arweddion craig rock flour blawd craig rock flours blawd craig rock hollow lakeland llyndir creicafn rock hollow lakelands llyndir creicafn rock salt halen craig rock salts halen craig rocket roced rocket siglydd (tool post) rockets roced rockets siglydd (tool post) rockfish pysgodyn carreg rockfishs pysgodyn carreg rocking chair cadair siglo rocking chairs cadair siglo rocks craig rococo rococo rod rhoden rod and glove puppet pyped rod a maneg rod and glove puppets pyped rod a maneg rod puppet pyped rod rod puppets pyped rod rodent cnofil rodent control rheoli cnofilod rodent infestation pla cnofilod rodent infestations pla cnofilod rodents cnofil rods and cones rhodenni a chonau roe bola caled (of fish - hard) roe bola meddal (of fish - soft) rogue value gwalchwerth rogue values gwalchwerth rolag gwlân (teased wool) rolags gwlân (teased wool) role swyddogaeth role conflict gwrthdaro rhwng swyddogaethau role model delfryd ymddwyn role models delfryd ymddwyn role of health educators rôl addysgwyr iechyd role of microbes swyddogaeth microbau role play chwarae rhan roles swyddogaeth roll rholio roll rholyn roll call galw cofrestr roll collar coler rhôl roll collars coler rhôl roll in rholio mewn roll on/roll off gyrru mewn ac allan roll over trosglwyddo ymlaen roll sulphur sylffwr rhôl roll sulphurs sylffwr rhôl roller rholer roller bearing rholferyn roller bearings rholferyn roller blind llen rholer roller blinds llen rholer roller follower dilynwr rholer roller followers dilynwr rholer roller loom gwŷdd rholer roller looms gwŷdd rholer roller shuttle gwennol rholer roller shuttles gwennol rholer rollers gwanegau (of waves) rollers rholer rolling downland twyndir tonnog rolling downlands twyndir tonnog rolling pin rholbren rolling pins rholbren rolling review adolygiad treigl rolling reviews adolygiad treigl rolling stock rholstoc rolling stocks rholstoc rolls rholyn romance rhamant romances rhamant romantic rhamantaidd romantic art celfyddyd ramantaidd romantic arts celfyddyd ramantaidd romantic music cerddoriaeth ramantaidd romantic musics cerddoriaeth ramantaidd romanticism rhamantiaeth romanticisms rhamantiaeth romper romper rompers romper rondeau rondeau rondeaus rondeau rondo rondo rondo form ffurf rondo rondo forms ffurf rondo rood crog rood loft croglofft rood lofts croglofft rood screen croglen rood screens croglen roods crog roof to roof cladding cladin to roof claddings cladin to roof line llinell doeau roof lines llinell doeau roof pitch serthiant to roof pitches serthiant to roof truss cwpl to roofing felt ffelt toi roofing felts ffelt toi roofing tile teilsen to roofing tiles teilsen to roofs to room divider rhannwr ystafell room dividers rhannwr ystafell room heater gwresogydd ystafell room heaters gwresogydd ystafell room occupancy deiliadaeth ystafelloedd room temperature tymheredd yr ystafell room temperatures tymheredd yr ystafell roost clwyd roosts clwyd root gwreiddyn (of plant) root isradd (in mathematics) root cap gwreiddgapan root caps gwreiddgapan root chord cord gwreiddnod root chords cord gwreiddnod root crop cnwd gwraidd root crops cnwd gwraidd root hair gwreiddflewyn root hair cell cell wreiddflew root hair cells cell wreiddflew root hairs gwreiddflewyn root mean square isradd sgwâr cymedrig root mean squares isradd sgwâr cymedrig root node cwgn gwreiddyn root nodes cwgn gwreiddyn root nodule gwreiddgnepyn root nodules gwreiddgnepyn root of the equation gwreiddyn yr hafaliad root position safle gwreiddiol root positions safle gwreiddiol root pressure gwasgedd gwraidd root pressures gwasgedd gwraidd root tip blaenwreiddyn root tips blaenwreiddyn root vegetable gwreiddlysieuyn root vegetables gwreiddlysieuyn rooted plant planhigyn gwreiddiog rooted plants planhigyn gwreiddiog rootless harmony harmoni di-wraidd rootlet gwreiddiosyn rootlets gwreiddiosyn roots gwreiddyn (of plant) roots isradd (in mathematics) rope rhaff rope ladder ysgol raff rope ladders ysgol raff rope stitch pwyth rheffyn rope stitches pwyth rheffyn ropes rhaff ropeway rhaffordd rosary llaswyr rose rhosyn (enamelling colour) rose bit rhosebill rose bits rhosebill rose countersink bit ebill gwrthsoddi rhychog rose countersink bits ebill gwrthsoddi rhychog rose path pattern patrwm lôn y rhosyn rose path patterns patrwm lôn y rhosyn rose reamer rhosagorell rose reamers rhosagorell rose window ffenestr ros rose windows ffenestr ros roses rhosyn (enamelling colour) rosette rhosglwm rosette chain stitch pwyth cadwyn rhosyn rosette chain stitches pwyth cadwyn rhosyn rosettes rhosglwm rosewood rhosbren rosewood handle carn rhosbren rosewood handles carn rhosbren rostrum rostrwm rostrums rostrwm rot pydredd rotary cylchdro rotary clothes line lein ddillad gylchdro rotary clothes lines lein ddillad gylchdro rotary converter trawsnewidydd cylchdro rotary converters trawsnewidydd cylchdro rotary iron peiriant smwddio cylchdro rotary irons peiriant smwddio cylchdro rotary motion mudiant cylchdro rotary motions mudiant cylchdro rotary movement symudiad cylchdro rotary movements symudiad cylchdro rotary quern breuan droi rotary querns breuan droi rotary valve falf drogylch rotary valves falf drogylch rotary-cut veneer argaen toriad cylchdro rotary-cut veneers argaen toriad cylchdro rotate cylchdroi rotate by hand cylchdroi â llaw rotate colours cylchdroi lliwiau rotate freely cylchdroi'n rhydd rotation cylchdro rotation of crops cylchdro cnydau rotational energy egni cylchdroi rotational grazing pori cylchdro rotational motion mudiant cylchdro rotational motions mudiant cylchdro rotational movement symudiad cylchdro rotational movements symudiad cylchdro rotational slip cylchlithriad rotational slips cylchlithriad rotational symmetry cymesuredd cylchdro rotations cylchdro rotor rotor rotors rotor rotten pwdr rotten borough bwrdeistref bwdr rotten boroughs bwrdeistref bwdr rouge rhuddliw rouges rhuddliw rough bras (=approximate) rough garw (of surface, land) rough and tumble chwarae sgarmes rough answer ateb bras rough answers ateb bras rough cut file ffeil frasddant rough cut files ffeil frasddant rough dimensions dimensiynau lled agos rough draft drafft bras rough drafts drafft bras rough drawing lluniad lled gywir rough drawings lluniad lled gywir rough dry bras-sych rough dry bras-sychu rough metric equivalent cywerth metrig bras rough metric equivalents cywerth metrig bras rough open garw agored rough opens garw agored rough pasture porfa arw rough pastures porfa arw rough sawn braslifiad rough surface arwyneb garw rough surfaces arwyneb garw roughage bwyd garw roughages bwyd garw roughening tool brasnaddell roughening tools brasnaddell roughing brasnaddu (of lathe tools) roughing reamer agorell frasnaddu roughing reamers agorell frasnaddu roughness garwedd rouleau loop dolen rouleau rouleau loops dolen rouleau round crwn round cylch (in penillion singing) round pennill (of music) round rownd (in sport etc) round arch bwa crwn round arches bwa crwn round base sylfaen gron round bases sylfaen gron round bottomed flask fflasg fongron round bottomed flasks fflasg fongron round centre cane gwialen ganol crwn round centre canes gwialen ganol crwn round down talgrynnu i lawr round edge ymyl gron round edges ymyl gron round end pen crwn round ends pen crwn round faced spokeshave rhasgl wyneb crwn round faced spokeshaves rhasgl wyneb crwn round file ffeil gron round files ffeil gron round head stake bonyn pengrwn round head stakes bonyn pengrwn round leg coes gron round legs coes gron round lost head nail hoelen gron bengoll round lost head nails hoelen gron bengoll round nail hoelen gron round nails hoelen gron round neck gwddf crwn round necks gwddf crwn round nose trwyn crwn (of lathe tools) round nose pliers gefelen drwyn crwn round noses trwyn crwn (of lathe tools) round off talgrynnu round plane plaen crwn round planes plaen crwn round section material defnydd trychiad crwn round section materials defnydd trychiad crwn round up talgrynnu i fyny round vault llofnaid gylch round vaults llofnaid gylch round-headed key allwedd ben crwn roundabout cylchfan roundabouts cylchfan rounded gorffenedig (=finished) rounded llyfngrwn (of hills) rounded drawer slip drôr-gryfhawr crwm rounded drawer slips drôr-gryfhawr crwm rounders rownderi roundhead bolt bollt bengron roundhead bolts bollt bengron roundhead rivet rhybed pengrwn roundhead rivets rhybed pengrwn roundhead scissors siswrn pig crwn roundhead screw sgriw bengron roundhead screws sgriw bengron rounding crymu rounding error cyfeiliornad talgrynnu rounding errors cyfeiliornad talgrynnu roundness crynrwydd roundness index indecs crymder roundness indexes indecs crymder rounds cylch (in penillion singing) rounds pennill (of music) rounds rownd (in sport etc) rousing jig jig cyffrous rousing jigs jig cyffrous rout gyrru ar ffo route llwybr route llwybro router llwybrydd router plane plaen dyfnder router planes plaen dyfnder routers llwybrydd routes llwybr routeway llwybr routine rheolwaith (=set sequence) routine trefn (=regular procedure) routines rheolwaith (=set sequence) routines trefn (=regular procedure) routs gyrru ar ffo roving harmony cynghanedd gyfnewidiol row rheng (in sport) row rhes (=line) row rhwyfo (with oars) row matrix matrics rhes row matrixes matrics rhes row reduction newidiadau rhes row vector fector rhes row vectors fector rhes rowlock roloc rowlocks roloc royal brenhinol royal estates ystadau brenhinol royal minister gweinidog y brenin royal ministers gweinidog y brenin royal power pŵer y brenin royal powers pŵer y brenin royal prerogative uchelfraint y brenin royal prerogatives uchelfraint y brenin royal progress taith frenhinol royalist brenhinwr royalists brenhinwr rub rhwbio rub out diddymu rubbed joint uniad rhwbiedig rubbed joints uniad rhwbiedig rubber rwber rubber band band rwber rubber bands band rwber rubber bung topyn rwber rubber bungs topyn rwber rubber hammer morthwyl rwber rubber hammers morthwyl rwber rubber squeegee gwesgi rwber rubber squeegees gwesgi rwber rubber washer wasier rwber rubber washers wasier rwber rubber webbing webin rwber rubber webbings webin rwber rubbers rwber rubbing ffrotais (frottage) rubbing rhwbiad (in general) rubbing board bwrdd rhwbio rubbing boards bwrdd rhwbio rubbing down rhwbio rubbing method dull rhwbio rubbing methods dull rhwbio rubbing stick ffon rwbio rubbing sticks ffon rwbio rubbing strips stribedi rhwbio rubbings ffrotais (frottage) rubbings rhwbiad (in general) rubbish sbwriel rubbishs sbwriel rubble rwbel rubbles rwbel rubella rwbela rubellas rwbela rubidium rwbidiwm (Rb) rubidiums rwbidiwm (Rb) rubric cyfarwyddyd rubrics cyfarwyddyd ruck ryc rucks ryc rudder llyw rudderlines rhaffau llyw rudders llyw rudimentary elfennol (organ etc) rudimentary level lefel elfennol rudimentary levels lefel elfennol ruffle ryffl ruffle ryfflo ruffled neck gwddf ryffl ruffled necks gwddf ryffl ruffler rhyfflydd (machine attachments) rufflers rhyfflydd (machine attachments) ruffles ryffl rug ryg rugby rygbi rugby ball pêl rygbi rugby balls pêl rygbi rugby shirt crys rygbi rugby shirts crys rygbi rugged individualism unigolyddiaeth rymus rugged individualisms unigolyddiaeth rymus ruggedness garwedd ruin adfail ruins adfail rule rheol (of order, law) rule rheolaeth (=government, dominion) rule riwl (for measuring, getting straight lines) rule and thumb gauge medrydd riwl a bawd rule and thumb gauges medrydd riwl a bawd rule joint uniad riwl rule joint hinge colfach uniad riwl rule joint hinges colfach uniad riwl rule joints uniad riwl rule of Stalin llywodraeth Stalin rule of law rheolaeth cyfraith rule of procedure rheol trefniadaeth rule of thirds rheol traeanau rule of three rheol tri rule off gwahanu rule utilitarianism iwtilitariaeth rheol (with parallel lines) rule utilitarianisms iwtilitariaeth rheol (with parallel lines) rule-based seiliedig ar reolau ruled llinellog ruler mesurydd (on computer screen) ruler pren mesur (=strip of wood for measuring) ruler rheolwr (=person who rules) ruler riwl (=graduated straight measure) rulers mesurydd (on computer screen) rulers pren mesur (=strip of wood for measuring) rulers rheolwr (=person who rules) rulers riwl (=graduated straight measure) rules rheol (of order, law) rules rheolaeth (=government, dominion) rules riwl (for measuring, getting straight lines) rules and conventions rheolau a chonfensiynau rules of indices rheolau indecsau rules of precedence rheolau blaenoriaeth ruling class dosbarth llywodraethol ruling pen pen riwlio ruling pens pen riwlio rumba rhwmba rumbas rhwmba rumen rwmen rumens rwmen ruminant anifail cnoi cil ruminants anifail cnoi cil run libart (=enclosed yard) run rhedeg run rhediad (in sport etc) run out rhedeg allan run out rhediad allan run outs rhediad allan run with the ball rhedeg â'r bêl run-off dŵr ffo run-offs dŵr ffo run-time amser rhedeg run-times amser rhedeg rundale lleiniau cytal (=runrig) rune llythyren rwnig runes llythyren rwnig rung ffon ysgol rungs ffon ysgol runic alphabet gwyddor rwnig runic alphabets gwyddor rwnig runnel corffrwd runnels corffrwd runner cydredwr (cricket) runner rhedwr (of person) runner rhedwr drôr (of drawer) runner ymledydd (in botany) runner beans ffa dringo runner cup cwpan ymledu runner cups cwpan ymledu runner peg peg rhedwr (casting) runner pegs peg rhedwr (casting) runners cydredwr (cricket) runners rhedwr (of person) runners rhedwr drôr (of drawer) runners ymledydd (in botany) running angle ongl redeg running angles ongl redeg running commentary sylwebaeth ar y pryd running cost cost rhedeg running costs cost rhedeg running fit ffit redegog running fits ffit redegog running method dull o redeg running methods dull o redeg running oblique back vault llofnaid wellaif running oblique back vaults llofnaid wellaif running order trefn rhaglen running orders trefn rhaglen running shoe esgid redeg running shoes esgid redeg running stitch pwyth rhedeg running stitches pwyth rhedeg running technique techneg rhedeg running techniques techneg rhedeg running track trac rhedeg running tracks trac rhedeg running true rhedeg yn gywir running vest fest redeg running vests fest redeg runrig lleiniau cytal runway rhedfa rupture rhwyg (in general) rupture torlengig (medical) rupture torri llengig (medical) rupture ymdorri (of cell) ruptures rhwyg (in general) ruptures torlengig (medical) rural gwledig rural area ardal wledig rural areas ardal wledig rural dean deon gwlad rural deanery deoniaeth wlad rural deans deon gwlad rural history hanes cefn gwlad rural school ysgol wledig rural schools ysgol wledig rural-urban continuum continwwm gwledig-trefol rural-urban continuums continwwm gwledig-trefol rurban fringe cyrion gwledig trefol rush brwynen rush hour awr frys rush hours awr frys rushs brwynen rusk rhysgen rusks rhysgen rust cawod goch, y gawod goch (plant disease) rust rhwd (in chemistry) rust rhydu rust inhibitor atalydd rhwd rust inhibitors atalydd rhwd rusted rhydlyd rustic gwledig rustic furniture celfi gwledig rustification creigwaith rustifications creigwaith rustless nail hoelen wrthrwd rustless nails hoelen wrthrwd rustless screw sgriw wrthrwd rustless screws sgriw wrthrwd rustproof gwrthrwd rusts cawod goch, y gawod goch (plant disease) rusts rhwd (in chemistry) rusty rhydlyd ruthenium rwtheniwm (Ru) rutheniums rwtheniwm (Ru) rye bread bara rhyg rye breads bara rhyg ryegrass rhygwellt ryot raiot ryots raiot répétiteur répétiteur répétiteurs répétiteur sabbatical sabothol sable sabl sable brush brwsh sabl sable brushs brwsh sabl sables sabl sabre sabr sabre saw llif sabr sabre saws llif sabr sabres sabr sac coden saccharin sacarin saccharins sacarin saccular codennog sacculate codennaidd saccule codennyn saccules codennyn sacerdotal offeiriadol sacerdotalism offeiriadolaeth sacerdotalisms offeiriadolaeth sack anrhaith (=destruction) sack anrheithio (=plunder and destroy) sack sach (=large bag) sacks anrhaith (=destruction) sacks sach (=large bag) sacral vertebra fertebra'r sacrwm sacral vertebras fertebra'r sacrwm sacrament sacrament (=religious ceremony or act) sacrament sagrafen (=consecrated elements) sacraments sacrament (=religious ceremony or act) sacraments sagrafen (=consecrated elements) sacred cysegredig (=consecrated) sacred sanctaidd (=holy) sacred monogram monogram sanctaidd sacred monograms monogram sanctaidd sacred thread edau sanctaidd sacred threads edau sanctaidd sacred writings ysgrifeniadau cysegredig sacrifice aberth sacrifices aberth sacring bell cloch aberth sacring bells cloch aberth sacristan sacristan sacristans sacristan sacristy sacristi sacrum sacrwm sacrums sacrwm saddle cyfrwy saddle key allwedd gyfrwy saddle quern breuan gyfrwy saddle querns breuan gyfrwy saddle stitch pwyth cyfrwy saddle stitches pwyth cyfrwy saddle yoke iau cyfrwy saddle yokes iau cyfrwy saddlepoint col (=col) saddlepoints col (=col) saddles cyfrwy sadism sadistiaeth sadisms sadistiaeth safe diogel safe edge ymyl ddiogel (file part) safe edges ymyl ddiogel (file part) safe practice ymarfer diogel safe practices ymarfer diogel safe working practices arferion gweithio diogel safety diogelwch safety belt gwregys diogelwch safety belts gwregys diogelwch safety device dyfais ddiogelwch safety devices dyfais ddiogelwch safety equipment offer diogelwch safety guard gard diogelwch safety guards gard diogelwch safety ladle lletwad ddiogelwch safety ladles lletwad ddiogelwch safety mark marc diogelwch safety marks marc diogelwch safety net rhwyd ddiogelwch safety nets rhwyd ddiogelwch safety pin pìn cau safety pins pìn cau safety precautions rhagofalon diogelwch safety procedure dull gweithredu diogel safety procedures dull gweithredu diogel safety regulations rheoliadau diogelwch safety requirements gofynion diogelwch safety risk perygl i ddiogelwch safety risks perygl i ddiogelwch safety screen sgrin ddiogelu safety screens sgrin ddiogelu safety standards safonau diogelwch safety switch switsh diogelu safety switches switsh diogelu safety valve falf ddiogelu safety valves falf ddiogelu safety-barrier clwyd ddiogelwch safety-barriers clwyd ddiogelwch safety-harness harnais diogelwch sag ysigiad sag ysigo saga saga sagas saga sage bush llwyn saets sage bushs llwyn saets sagebrush prysgwydd saets sagger sager saggers sager sagittal saethol sagittal section toriad saethol sagittal sections toriad saethol sahel sahel sahelian sahelaidd sahels sahel sail hwylio sailcloth defnydd hwyliau sailcloths defnydd hwyliau saint sant saint's day gŵyl mabsant saints sant saithe celog saithes celog sal ammoniac sal amoniac sal ammoniacs sal amoniac salad bowl bowlen salad salad bowls bowlen salad salad dressing blaslyn salad salad dressings blaslyn salad salary cyflog salbutamol salbwtamol salbutamols salbwtamol sale gwerthiant sale by sample gwerthiant wedi dod trwy sampl sales gwerthiant sales cost cost gwerthiant sales costs cost gwerthiant sales figures ffigurau gwerthu sales floor llawr gwerthu sales floors llawr gwerthu sales forecasting rhagolygu gwerthiant sales growth twf gwerthiant sales growths twf gwerthiant sales invoice anfoneb gwerthiant sales invoices anfoneb gwerthiant sales ledger llyfr gwerthiant sales ledgers llyfr gwerthiant sales manager rheolwr gwerthu sales managers rheolwr gwerthu sales person gwerthwr sales personnel personél gwerthu sales personnels personél gwerthu sales persons gwerthwr sales promotion hyrwyddo gwerthiant sales returns dychweliadau gwerthiant sales revenue refeniw gwerthiant sales revenues refeniw gwerthiant sales staff staff gwerthu sales staffs staff gwerthu sales turnover trosiant gwerthu sales turnovers trosiant gwerthu sales volumes maint y gwerthiant salesman gwerthwr salesmans gwerthwr salient amlwg salina salina salinas salina saline halwynog saline heli saline solution hydoddiant halwynog saline solutions hydoddiant halwynog salines heli salinity halwynedd saliva poer saliva gland chwarren boer saliva glands chwarren boer salivary poerol salivary amylase amylas poerol salivary amylases amylas poerol salivary gland chwarren boer salivary glands chwarren boer salivas poer sally port cyrchborth sally ports cyrchborth salon salon salons salon salt halen (=sodium chloride) salt halwyn (in chemistry) salt cellar llestr halen salt cellars llestr halen salt content cynnwys halen salt contents cynnwys halen salt deposits dyddodion halen salt flat gwastad heli salt flats gwastad heli salt lake llyn halen salt lakes llyn halen salt marsh morfa heli salt marshs morfa heli salt pan pant heli salt pans pant heli salt water heli salt waters heli saltarello saltarelo saltation neidiant saltations neidiant saltatory neidiol saltings halwyndir saltpetre solpitar saltpetres solpitar salts halen (=sodium chloride) salts halwyn (in chemistry) salts of lemon halwynau lemwn salty hallt salute saliwt salute saliwtio salutes saliwt salvation iachawdwriaeth salvations iachawdwriaeth samadhi samadhi samadhis samadhi samarium samariwm (Sm) samariums samariwm (Sm) samatha samatha samathas samatha samba samba sambas samba sample sampl sample samplu sample area ardal samplu sample areas ardal samplu sample space gofod sampl sample spaces gofod sampl sample study astudiaeth sampl sampler sampler samplers sampler samples sampl sampling distribution dosraniad samplu sampling distributions dosraniad samplu sampling errors cyfeiliornadau samplu sampling gate adwy samplu sampling gates adwy samplu sampling method dull samplu sampling methods dull samplu sampling technique techneg samplu sampling techniques techneg samplu samsara samsara samsaras samsara sanctification sancteiddhad sanctifications sancteiddhad sanctions sancsiynau (economic) sanctuary gwarchodfa (for animals) sanctuary noddfa (=refuge) sanctuary seintwar (in temple etc) sand tywod sand bank banc tywod sand banks banc tywod sand bar bar tywod sand bars bar tywod sand bin bin tywod sand bins bin tywod sand box blwch tywod sand boxes blwch tywod sand bunker byncer tywod sand bunkers byncer tywod sand dune twyn tywod sand dunes twyn tywod sand inclusions cynhwysion tywod sand spit tafod tywod sand spits tafod tywod sandbag bag tywod sandbags bag tywod sander sandiwr sanders sandiwr sanding disc disg llyfnu sanding discs disg llyfnu sandpaper papur gwydrog sandpapers papur gwydrog sandpit pwll tywod sandpits pwll tywod sands tywod sandstone tywodfaen sandstones tywodfaen sandur sandur sandurs sandur sandwich construction adeiladwaith llafnog sandwich construction chipboard bwrdd sglodion adeiladwaith llafnog sandwich construction chipboards bwrdd sglodion adeiladwaith llafnog sandwich constructions adeiladwaith llafnog sane in insane places call o dan amgylchiadau gwallgof sanitary protection darpariaeth mislif sanitary protections darpariaeth mislif sanitation iechydaeth sanitations iechydaeth sans-culottes sans-culottes sap nodd sap green gwyrdd sudd sap greens gwyrdd sudd sapling glasbren saplings glasbren saponification seboneiddiad saponifications seboneiddiad saponify seboneiddio sapper cloddiwr sappers cloddiwr saprophage saproffag saprophages saproffag saprophyte saproffyt saprophyte saproffytig saprophytes saproffyt sapwood gwynnin (alburnum) sapwoods gwynnin (alburnum) sash sash sash bar bar gwydriad sash bars bar gwydriad sash catch clicied sash sash catches clicied sash sash cramp cramp hir sash cramps cramp hir sash fastener ffasnydd sash sash fasteners ffasnydd sash sash joint uniad ffrâm sash joints uniad ffrâm sash pivot colyn sash sash pivots colyn sash sash weight pwysyn sash sash weights pwysyn sash sash window ffenestr ddalennog sash windows ffenestr ddalennog sashs sash sateen satîn sateens satîn satellite lloeren satellite broadcasting darlledu lloeren satellite state gwlad ddibynnol satellite states gwlad ddibynnol satellite town tref ddibynnol satellite towns tref ddibynnol satellites lloeren satin satin satin finish gorffeniad satin satin finishs gorffeniad satin satin stitch pwyth satin satin stitches pwyth satin satin weave gwehyddiad satin satin weaves gwehyddiad satin satins satin satisfaction boddhad satisfactions boddhad satisfactory boddhaol satisfier bodlonwr satisfiers bodlonwr satisfy bodloni saturate dirlenwi saturated dirlawn saturated fat braster dirlawn saturated fats braster dirlawn saturated fatty acid asid brasterog dirlawn saturated fatty acids asid brasterog dirlawn saturated solution hydoddiant dirlawn saturated solutions hydoddiant dirlawn saturated vapour pressure gwasgedd anwedd dirlawn saturated vapour pressures gwasgedd anwedd dirlawn saturation dirlawnder saturation point pwynt dirlawnder saturation points pwynt dirlawnder saturation zone cylchfa ddirlawnder saturation zones cylchfa ddirlawnder saturations dirlawnder saucer soser saucers soser savannah safana savannah grassland tir glas y safana savannah grasslands tir glas y safana savannahs safana save arbed (=rescue) save cadw (in computing) save cynilo (=make economies) save a shot arbed ergyd save as cadw fel save screen cadw sgrin savers cynilwyr saving arbediad savings arbediad savings cynilion (=money saved) savings account cyfrif cynilo savings accounts cyfrif cynilo savings bank banc cynilo savings banks banc cynilo savings box cadw-mi-gei savings boxes cadw-mi-gei savings scheme cynllun cynilo savings schemes cynllun cynilo saw llif saw llifio saw set llifosodiad saw sets llifosodiad saw teeth dannedd llif saw vice feis hogi llif saw vices feis hogi llif saw-cut llifdoriad saw-cut veneer argaen llifdoriad saw-cut veneers argaen llifdoriad saw-cuts llifdoriad saw-fence ffens lif saw-fences ffens lif saw-frame ffrâm lif saw-frames ffrâm lif saw-setting anvil eingion gosod llif saw-setting anvils eingion gosod llif saw-setting hammer morthwyl gosod llif saw-setting hammers morthwyl gosod llif saw-setting pliers gefelen osod llif sawdust blawd llif sawdusts blawd llif sawing board bwrdd llifio sawing boards bwrdd llifio sawmill melin lifio sawmills melin lifio sawn nut nyten wedi'i llifio sawn nuts nyten wedi'i llifio sawn timber pren wedi'i lifio sawn timbers pren wedi'i lifio sawyer llifiwr sawyers llifiwr scab crachen scabies clefyd crafu scabland garwdir basalt scablands garwdir basalt scabs crachen scaffold crocbren (=gallows) scaffold sgaffald (for construction purposes) scaffolding sgaffaldio scaffolds crocbren (=gallows) scaffolds sgaffald (for construction purposes) scalar sgalar scalar multiplication lluosiad sgalar scalar multiplications lluosiad sgalar scalar product lluoswm sgalar scalar products lluoswm sgalar scalar quantity mesur sgalar scalars sgalar scald sgaldiad scalding sgaldanu scalds sgaldiad scale cen (in furnace or on plants) scale clorian (for weighing) scale graddfa (=series of degrees, ratio) scale graddio scale drawing lluniad wrth raddfa scale drawings lluniad wrth raddfa scale factor ffactor graddfa scale factors ffactor graddfa scale leaf cenddeilen scale leafs cenddeilen scale mock-up brasfodel wrth raddfa scale mock-ups brasfodel wrth raddfa scale of hardness graddfa galedwch scale of three graddfa tri scale of two graddfa dau scale picture graddio llun scale sprite graddio ciplun scale working model model gweithio i raddfa scale working models model gweithio i raddfa scaled copy copi graddfa scalene anghyfochrog scalene triangle triongl anghyfochrog scalene triangles triongl anghyfochrog scales cen (in furnace or on plants) scales clorian (for weighing) scales graddfa (=series of degrees, ratio) scaliform thickening tewychiad sgalaraidd scaliform thickenings tewychiad sgalaraidd scaling factor ffactor graddio scaling factors ffactor graddio scallop sgolop scallop sgolopio scalloped edge ymyl sgolop scalloped edges ymyl sgolop scallops sgolop scalpel cyllell llawfeddyg scalpels cyllell llawfeddyg scaly cennog scan sgan scan sganio scandal sgandal scandals sgandal scandium scandiwm (Sc) scandiums scandiwm (Sc) scanner sganiwr scanners sganiwr scans sgan scapegoat bwch dihangol scapegoats bwch dihangol scapula padell yr ysgwydd scapular sgapwlar scapulars sgapwlar scapulas padell yr ysgwydd scar craith scar tissue meinwe craith scar tissues meinwe craith scarce resources adnoddau prin scarcity prinder scarf sgarff scarf sgarffio scarf joint uniad sgarff scarf joints uniad sgarff scarfs sgarff scarlet fever twymyn goch scarlet fevers twymyn goch scarlet lake llif sgarlad scarlet lakes llif sgarlad scarlet madder madr sgarlad scarlet madders madr sgarlad scarp sgarp scarp fault sgarp ffawt scarp faults sgarp ffawt scarp slope llethr sgarp scarp slopes llethr sgarp scarpland sgarpdir scarplands sgarpdir scarps sgarp scars craith scatter gwasgaru scatter cushions mân glustogau scatter diagram diagram gwasgariad scatter diagrams diagram gwasgariad scatter graph graff gwasgariad scatter graphs graff gwasgariad scattered particles gronynnau gwasgarog scattered pattern patrwm gwasgarog scattered patterns patrwm gwasgarog scattered settlement annedd wasgarog scattered settlements annedd wasgarog scattering gwasgariad scatterings gwasgariad scavenge carthysu scavenger carthysydd scavengers carthysydd scene golygfa scene designer cynllunydd golygfeydd scene designers cynllunydd golygfeydd scene painter peintiwr golygfeydd scene painters peintiwr golygfeydd scene painting peintio golygfa (of process or art) scenery golygfa scenes golygfa scenic beauty golygfeydd prydferth scenic route ffordd hynod o hardd scenic routes ffordd hynod o hardd scent mark arwydd sawr scent marks arwydd sawr sceptre teyrnwialen sceptres teyrnwialen schattenseite cil haul schattenseites cil haul schedule amserlen (=timetable) schedule atodlen (=appendix to a document) schedule rhaglen (=programme) schedule rhestr (=inventory) schedules amserlen (=timetable) schedules atodlen (=appendix to a document) schedules rhaglen (=programme) schedules rhestr (=inventory) schema sgema schemas sgema schematic sgematig schematic diagram diagram cynllunio schematic diagrams diagram cynllunio scheme cynllun scheme of assessment cynllun asesu scheme of work cynllun gwaith schemes cynllun scherzo scherzo scherzo and trio scherzo a thrio schism sgism schismatic sgismatig schisms sgism schist sgist schistosity sgistedd schists sgist schizocarp sgitsocarp schizocarps sgitsocarp scholarship ysgolheictod (=learning) scholarship ysgoloriaeth (=award of money) scholarships ysgolheictod (=learning) scholarships ysgoloriaeth (=award of money) scholastic sgolastig scholasticism sgolastigiaeth scholasticisms sgolastigiaeth school ysgol school budget cyllideb ysgol school budgets cyllideb ysgol school catchment area dalgylch ysgol school catchment areas dalgylch ysgol school championships pencampwriaethau ysgolion school child plentyn ysgol school childs plentyn ysgol school consortium consortiwm ysgolion school consortiums consortiwm ysgolion school counsellor cynghorwr ysgol school counsellors cynghorwr ysgol school development plan cynllun datblygu ysgol school development plans cynllun datblygu ysgol school dinner cinio ysgol school dinners cinio ysgol school fund cronfa ysgol school funds cronfa ysgol school governor llywodraethwr ysgol school governors llywodraethwr ysgol school ground tir yr ysgol school grounds tir yr ysgol school leaving certificate tystysgrif gadael ysgol school leaving certificates tystysgrif gadael ysgol school library llyfrgell ysgol school meals prydau ysgol school nurse nyrs ysgol school nurses nyrs ysgol school of composition traddodiad cyfansoddi school performance table tabl perfformiad ysgolion school performance tables tabl perfformiad ysgolion school report adroddiad ysgol school reports adroddiad ysgol school site safle'r ysgol school sites safle'r ysgol school uniform gwisg ysgol school uniforms gwisg ysgol school year blwyddyn ysgol school years blwyddyn ysgol school-based indicator dangosydd yn yr ysgol school-based indicators dangosydd yn yr ysgol schoolman ysgolwr schoolmans ysgolwr schools ysgol sciatic clunol (of nerve) sciatic nerve nerf clunol sciatic nerves nerf clunol science gwyddoniaeth (especially concerned with material and functions of physical universe) science gwyddor (=systematic and formulated body of knowledge) science fiction ffuglen wyddonol science fictions ffuglen wyddonol science of navigation mordwyeg science working group gweithgor gwyddoniaeth science working groups gweithgor gwyddoniaeth sciences gwyddoniaeth (especially concerned with material and functions of physical universe) sciences gwyddor (=systematic and formulated body of knowledge) scientific claims honiadau gwyddonol scientific concept cysyniad gwyddonol scientific concepts cysyniad gwyddonol scientific convention confensiwn gwyddonol scientific conventions confensiwn gwyddonol scientific idea syniad gwyddonol scientific ideas syniad gwyddonol scientific knowledge gwybodaeth wyddonol scientific knowledges gwybodaeth wyddonol scientific method dull gwyddonol scientific methods dull gwyddonol scientific model model gwyddonol scientific models model gwyddonol scientific principle egwyddor wyddonol scientific principles egwyddor wyddonol scientific symbol symbol gwyddonol scientific symbols symbol gwyddonol scintillate fflachennu scion brigyn impiedig scions brigyn impiedig scission toriant scissions toriant scissors dull siswrn (method) scissors siswrn (implement) scissors control rheolaeth siswrn scissors controls rheolaeth siswrn scissors kick cic siswrn scissors kicks cic siswrn scissors movement symudiad siswrn scissors movements symudiad siswrn scissors vault llofnaid siswrn scissors vaults llofnaid siswrn sclerenchyma sglerencyma sclerenchymas sglerencyma sclerosis sglerosis sclerotic sglerotig sclerous sglerws scolex sgolecs scolexes sgolecs scoop sgwpio scoop sgŵp scoops sgŵp scope cwmpas scopes cwmpas scorbutic sgorbwtig scorch deifio scorched earth policy polisi ymddiffeithio score rhicio (=cut or scratch a notch etc) score sgorio (points, goals etc) score sgôr (number of points, goals etc) score a goal sgorio gôl score a try sgorio cais score event cystadleuaeth sgôr score events cystadleuaeth sgôr score-sheet taflen sgorio score-sheets taflen sgorio scoreboard bwrdd sgôr scoreboards bwrdd sgôr scorer sgoriwr scorers sgoriwr scores sgôr (number of points, goals etc) scoria scoria scoring system system sgorio scoring systems system sgorio scorper sgorper scorpers sgorper scot and lot borough bwrdeistref scot a lot scot and lot boroughs bwrdeistref scot a lot scotia sgotia scotia moulding mowldin sgotia scotia mouldings mowldin sgotia scotias sgotia scotopic sensitivity syndrome syndrom sensitifedd sgotopig scotopic sensitivity syndromes syndrom sensitifedd sgotopig scour sgwrio scourer sgwrydd scourers sgwrydd scouring sgwriad scouring powder powdr sgwrio scouring powders powdr sgwrio scourings sgwriad scrambled egg wy wedi'i sgramblo scrambled eggs wy wedi'i sgramblo scrap sgrap scrap book llyfr lloffion scrap books llyfr lloffion scrap iron haearn sgrap scrap irons haearn sgrap scrap material defnydd sgrap scrap materials defnydd sgrap scrap metal metel sgrap scrap metals metel sgrap scrap wood pren gwastraff scrap woods pren gwastraff scrape sgrafellu scraper sgrafell scraper cutter torrell grafu scraper cutters torrell grafu scraper equipment taclau sgrafellu scraper plane plaen crafu scraper planes plaen crafu scraper sharpener hogwr sgrafell scraper sharpeners hogwr sgrafell scraperboard sgraffwrdd scraperboards sgraffwrdd scrapers sgrafell scraping sgrafellu (in finishing metal) scrapings crafion scraps sgrap scratch crafiad scratch crafu (in general) scratch dileu (=delete) scratch brush brwsh crafu scratch brushs brwsh crafu scratch disk disg dros dro scratch disks disg dros dro scratch memory cof dros dro scratch stock crafwr addurn scratch stocks crafwr addurn scratches crafiad scrawl sgriblo scree sgri screen cysgodi screen sgrin screen dump argraffu sgrin screen filler llenwad sgrin screen fillers llenwad sgrin screen frame ffrâm sgrin screen frames ffrâm sgrin screen layout cynllun sgrin screen layouts cynllun sgrin screen material defnydd sgrin screen materials defnydd sgrin screen the ball cysgodi'r bêl screen turtle crwban sgrin screen turtles crwban sgrin screen-printing sgrin-brintio screenful sgriniad screenfuls sgriniad screenplay sgript ffilm screens sgrin screenshot sgrinlun screenshots sgrinlun screes sgri screw sgriw screw sgriwio screw cup cwpan sgriw screw cups cwpan sgriw screw eye sgriw lygad screw eyes sgriw lygad screw gauge medrydd sgriw screw gauges medrydd sgriw screw hook bach sgriw screw hooks bach sgriw screw pitch gauge medrydd pitsh sgriw screw pitch gauges medrydd pitsh sgriw screw point pwynt sgriw screw points pwynt sgriw screw thread edau sgriw screw threads edau sgriw screw-bound sgriwglwm screw-jack jac sgriw screw-jacks jac sgriw screw-plate plât sgriwio screw-plates plât sgriwio screwbinder rhwymyn sgriw screwbinders rhwymyn sgriw screwdriver tyrnsgriw screwdriver bit ebill tyrnsgriw screwdriver bits ebill tyrnsgriw screwdrivers tyrnsgriw screwing block bloc sgriwio screwing blocks bloc sgriwio screws sgriw scribble sgriblo scribe copïwr (=copyist) scribe sgrifellu scribe ysgrifennydd (Biblical) scribed joint uniad sgrifellog scribed joints uniad sgrifellog scribed line llinell wedi'i sgrifellu scribed lines llinell wedi'i sgrifellu scriber sgrifell scribers sgrifell scribes copïwr (=copyist) scribes ysgrifennydd (Biblical) scribing block medrydd arwyneb scribing blocks medrydd arwyneb scribing gouge gaing gau wyneb scribing gouges gaing gau wyneb scrim sgrim scrims sgrim script llawysgrifen (=handwriting) script sgript (of film, play etc) script pen pen sgript script pens pen sgript scriptorium sgriptoriwm scriptoriums sgriptoriwm scripts llawysgrifen (=handwriting) scripts sgript (of film, play etc) scripture ysgrythur scriptures ysgrythur scrivener ysgrifner scriveners ysgrifner scroll rhôl scroll sgrolio scroll sgrôl scroll moulding mowldin sgrôl scroll mouldings mowldin sgrôl scroll tongs gefel sgrôl scroll wrench tyndro sgrôl scroll wrenches tyndro sgrôl scroll-bar bar-rholio scroll-bars bar-rholio scroll-down rholio i lawr scroll-up rholio i fyny scrolling sgrolio (forging process) scrolling tool erfyn sgrolio scrolling tools erfyn sgrolio scrolls rhôl scrolls sgrôl scrotum ceillgwd scrotums ceillgwd scrub prysg scrub sgrwbio scrub land tir prysg scrub lands tir prysg scrubs prysg scrum sgrym scrum sgrymio scrum-half mewnwr scrum-halfs mewnwr scrums sgrym scull sgwlio sculpt metal metel cerfiedig sculpt metals metel cerfiedig sculptor cerflunydd sculptors cerflunydd sculptural cerfluniol sculptural form ffurf gerfluniol sculptural forms ffurf gerfluniol sculptural unit uned gerfluniol sculptural units uned gerfluniol sculpture cerflunwaith sculptures cerflunwaith sculpturesque cerflunaidd scum llysnafedd scumble sgwmbl scumble sgwmblo scumbles sgwmbl scums llysnafedd scurf cen scurfs cen scurvy llwg, y llwg scutage ysgwtreth scutages ysgwtreth scutcheon pais arfau scutcheons pais arfau scutellum sgwtelwm scutellums sgwtelwm sea môr sea breeze awel o'r môr sea breezes awel o'r môr sea buckthorn helygen y môr sea buckthorns helygen y môr sea coal glo môr sea coals glo môr sea ford moryd sea fords moryd sea front glan y môr sea fronts glan y môr sea green gwyrdd y môr sea greens gwyrdd y môr sea lane llwybr môr sea lanes llwybr môr sea level lefel môr sea levels lefel môr sea lion morlew sea lions morlew sea lyme-grass amdowellt sea power grym morwrol (naval) sea powers grym morwrol (naval) sea scorpion scorpion môr sea scorpions scorpion môr sea-coast arfordir sea-coasts arfordir sea-gate morddrws sea-gates morddrws sea-urchin draenog môr sea-urchins draenog môr sea-water dŵr y môr sea-waters dŵr y môr seagrass morwellt seal morlo (=sea mammal) seal selio seal sêl (=piece of wax etc) seal swimming nofio morlo sealer seliwr sealers seliwr sealing work gwaith selio sealing works gwaith selio seals morlo (=sea mammal) seals sêl (=piece of wax etc) seam gwrym (of wrinkle, scar) seam gwythïen (of coal) seam sêm (in dressmaking) seam allowance lwfans sêm seam allowances lwfans sêm seam binding rhwymyn sêm seam bindings rhwymyn sêm seam finish gorffeniad sêm seam finishs gorffeniad sêm seam joint uniad sêm seam joints uniad sêm seam set gosodydd sêm seam sets gosodydd sêm seamed gwrymiog seaming semio seaming pliers gefelen semio seaming tool erfyn semio seaming tools erfyn semio seamless ferrule amgarn ddi-sêm seamless ferrules amgarn ddi-sêm seamount morfynydd seamounts morfynydd seams gwrym (of wrinkle, scar) seams gwythïen (of coal) seams sêm (in dressmaking) seaquake morgryn seaquakes morgryn search chwiliad search chwilio search and replace chwilio a newid search coil coil chwilio search coils coil chwilio search result canlyniad chwiliad search results canlyniad chwiliad search time amser chwilio search times amser chwilio searches chwiliad seascape morlun seascapes morlun seashore glan y môr seashores glan y môr seasickness salwch môr seaside resort cyrchfan glan-môr seaside resorts cyrchfan glan-môr seasonal changes newidiadau tymhorol seasonal constellation cytser tymhorol seasonal constellations cytser tymhorol seasonal entertainment adloniant tymhorol seasonal entertainments adloniant tymhorol seasonal song cân dymhorol seasonal songs cân dymhorol seasonal star seren dymhorol seasonal stars seren dymhorol seasoning sychu (of timber) seat eisteddle (of emotions etc) seat sedd (to sit on) seat of power canolfan grym seats eisteddle (of emotions etc) seats sedd (to sit on) seaward atfor seaway morffordd seaweed gwymon seaweeds gwymon sebaceous gland chwarren sebwm sebaceous glands chwarren sebwm sebkha sebca sebkhas sebca secant secant (sec) secants secant (sec) secco secco secede ymwahanu secession ymwahaniad secessionist ymwahanwr secessionists ymwahanwr secessions ymwahaniad sech sech seches sech second eilfed (interval) second eiliad (=sixtieth of a minute) second eilio (a motion) second German empire ail ymerodraeth yr Almaen second German empires ail ymerodraeth yr Almaen second cut file ffeil eildor second cut files ffeil eildor second degree equation hafaliad deuradd second degree equations hafaliad deuradd second fold ail blyg second folds ail blyg second generation ail genhedlaeth second generations ail genhedlaeth second growth ail dyfiant second growths ail dyfiant second inversion ail wrthdro second inversions ail wrthdro second leg ail gymal second legs ail gymal second lieutenant is-lifftenant second lieutenants is-lifftenant second mortgage ail forgais second mortgages ail forgais second order gradd dau (of reaction, in geography) second order trefn dau (in mathematics) second order equation hafaliad trefn dau second order equations hafaliad trefn dau second order reaction adwaith gradd dau second order reactions adwaith gradd dau second order spectrum sbectrwm trefn dau second order spectrums sbectrwm trefn dau second orders gradd dau (of reaction, in geography) second orders trefn dau (in mathematics) second point ail bwynt second points ail bwynt second row ail reng second rows ail reng second run ail rediad second runs ail rediad second service ail gynnig serfio second services ail gynnig serfio second slip ail slip second slips ail slip second tap ail dap second taps ail dap secondary eilaidd (in general) secondary eilradd (=less important) secondary uwchradd (of schools) secondary alcohol alcohol eilaidd secondary alcohols alcohol eilaidd secondary clay clai eilaidd secondary coil coil eilaidd secondary coils coil eilaidd secondary colour lliw eilaidd secondary colours lliw eilaidd secondary consumer ysydd eilaidd secondary consumers ysydd eilaidd secondary depression dirwasgedd dilynol secondary depressions dirwasgedd dilynol secondary education addysg uwchradd secondary educations addysg uwchradd secondary evidence tystiolaeth eilaidd secondary evidences tystiolaeth eilaidd secondary growth eildwf secondary growths eildwf secondary hazard perygl eilaidd secondary hazards perygl eilaidd secondary health care gofal iechyd eilaidd secondary health cares gofal iechyd eilaidd secondary industry diwydiant eilaidd secondary meristem meristem eilaidd secondary meristems meristem eilaidd secondary plumage plu eilaidd secondary productions cynhyrchion eilaidd secondary research ymchwil eilaidd secondary research data data ymchwil eilaidd secondary researches ymchwil eilaidd secondary road ffordd eilaidd secondary roads ffordd eilaidd secondary sector sector eilaidd secondary sectors sector eilaidd secondary sexual character nodwedd rywiol eilaidd secondary sexual characters nodwedd rywiol eilaidd secondary socialisation cymdeithasoli eilaidd secondary source ffynhonnell eilaidd secondary sources ffynhonnell eilaidd secondary storage storfa eilaidd secondary storages storfa eilaidd secondary thickening tewychu eilaidd secondary voltage foltedd eilaidd secondary voltages foltedd eilaidd secondary windings dirwyniad eilaidd secondary window ffenestr eilaidd secondary windows ffenestr eilaidd secondhand goods nwyddau ail-law secondment secondiad secondments secondiad seconds eilfed (interval) seconds eiliad (=sixtieth of a minute) secret cudd (=hidden) secret ballot pleidlais gudd secret ballots pleidlais gudd secret dovetail joint uniad cynffonnog cudd secret dovetail joints uniad cynffonnog cudd secret haunch hansh cudd secret haunched hansiedig cudd secret haunched mortise and tenon joint uniad mortais a thyno hansiedig cudd secret haunched mortise and tenon joints uniad mortais a thyno hansiedig cudd secret haunched tenon tyno hansiedig cudd secret haunched tenons tyno hansiedig cudd secret haunches hansh cudd secret lap dovetail goruniad cynffonnog cudd secret lap dovetails goruniad cynffonnog cudd secret lapped dovetail joint goruniad cudd cynffonnog secret lapped dovetail joints goruniad cudd cynffonnog secret mitre dovetail meitr cynffonnog cudd secret mitre dovetail joint uniad cynffonnog meitr cudd secret mitre dovetail joints uniad cynffonnog meitr cudd secret mitre dovetails meitr cynffonnog cudd secret nailing hoelio cudd secret screwing sgriwio cudd secret service gwasanaeth cudd secret services gwasanaeth cudd secret society cymdeithas gudd secret treaty cytundeb dirgel secretarial course cwrs ysgrifenyddol secretarial courses cwrs ysgrifenyddol secretariat ysgrifenyddiaeth secretariats ysgrifenyddiaeth secretary of state ysgrifennydd gwladol secretary-general ysgrifennydd cyffredinol secretary-generals ysgrifennydd cyffredinol secrete secretu secretin secretin secretins secretin secretion secretiad secretions secretiad sect sect sectarian sectyddol sectary sectydd section adran (in book, orchestra etc) section darn (of DNA) section toriad (in biology) section trychiad (of plan, drawing) section trychu (a plan, drawing) section line llinell drychu section lines llinell drychu section plane plân trychu section planes plân trychu sectional adrannol (=made in parts) sectional trychiadol (of drawing) sectional area arwynebedd trychiadol sectional areas arwynebedd trychiadol sectional drawing trychlun sectional drawings trychlun sectional elevation golwg trychiadol sectional elevations golwg trychiadol sectional end view ochrolwg trychiadol sectional end views ochrolwg trychiadol sectional front elevation blaenolwg trychiadol sectional front elevations blaenolwg trychiadol sectional paper papur adrannol sectional papers papur adrannol sectional plan uwcholwg trychiadol sectional plans uwcholwg trychiadol sectional view golwg trychiadol sectional views golwg trychiadol sectionalism triniaeth adrannol sectionalisms triniaeth adrannol sectioning line llinell drychu sectioning lines llinell drychu sections adran (in book, orchestra etc) sections darn (of DNA) sections toriad (in biology) sections trychiad (of plan, drawing) sector sector sector angle ongl sector sector angles ongl sector sector theory damcaniaeth sector sectors sector sects sect secular seciwlar secular clergy clerigaeth seciwlar secularism seciwlariaeth secularisms seciwlariaeth secularizations meddiannau a seciwlareiddiwyd secularize seciwlareiddio secure cysylltu (=fasten) secure diogel (=safe) secure diogelu (=make safe) secure school ysgol gadarn secure schools ysgol gadarn secure unit uned gadarn secure units uned gadarn security diogelwch (=safety) security gwarant (as deposit or pledge) security gwarchodaeth (in computing) security sicrwydd (of latch etc) security alarm larwm diogelwch security alarms larwm diogelwch security check gwiriad diogelwch security checks gwiriad diogelwch security of tenure sicrwydd daliadaeth security tab tab gwarchod security tabs tab gwarchod sedarim sedarim sedative tawelydd sedatives tawelydd sedentary eisteddog sedentary community cymuned sefydlog sedentary lifestyle ffordd o fyw eisteddog sedentary lifestyles ffordd o fyw eisteddog sedentary occupation galwedigaeth eisteddog sedentary occupations galwedigaeth eisteddog sedentary work gwaith eisteddog sedentary worker gweithiwr eisteddog sedentary workers gweithiwr eisteddog sedentary works gwaith eisteddog sedge hesgen sedges hesgen sediment gwaddod sedimentary gwaddodol sedimentary rocks creigiau gwaddod sedimentation gwaddodiad sedimentations gwaddodiad sediments gwaddod sedition cynnwrf seditions cynnwrf see esgobaeth see-saw sigl adenydd see-saws sigl adenydd seed detholyn (in sport) seed hedyn seed coat hadgroen seed coats hadgroen seed dispersion gwasgariad hadau seed dispersions gwasgariad hadau seed dressing dresin had seed dressings dresin had seed drill dril hau seed drills dril hau seed propagation lluosogi hadau seed vessel hadlestr seed vessels hadlestr seed-eater hadysydd seed-eaters hadysydd seed-eating hadysol seeded player chwaraewr dethol seeded players chwaraewr dethol seedling eginblanhigyn seedlings eginblanhigyn seeds detholyn (in sport) seeds hedyn seek cyrchu (in mathematics and physics) seek ymofyn (in computing) seek ymofyniad seek sanctuary ceisio noddfa seek time amser ymofyn seek times amser ymofyn seeks ymofyniad seep tryddiferu seepage tryddiferiad seepages tryddiferiad seersucker seersucker seersuckers seersucker segment segment segment segmentu segmental arch bwa segmentol segmental arches bwa segmentol segmentation segmentiad segmentations segmentiad segmented segmentiedig segments segment segregate arwahanu (in biology) segregate gwahanu (in general) seif seiff seifs seiff seigneurial arglwyddiaethol seigniorage hawl arglwydd seigniorages hawl arglwydd seigniory arglwyddiaeth seigniory homage gwrogaeth arglwyddiaeth seigniory homages gwrogaeth arglwyddiaeth seisin meddiant seisins meddiant seismic seismig seismic wave ton seismig seismic waves ton seismig seismograph seismograff seismographs seismograff seismology seismoleg seismonasty seismonastedd select dethol (in general) select dewis (in computing) select committee pwyllgor dethol select committees pwyllgor dethol selection detholiad selections detholiad selective detholus selective absorption amsugniad detholus selective absorptions amsugniad detholus selective advantage mantais ddetholus selective advantages mantais ddetholus selective benefit budd-dal dethol selective benefits budd-dal dethol selective breeding bridio detholus selective erosion erydu dethol selective heating gwres detholus selective heatings gwres detholus selective membrane pilen ddetholus selective membranes pilen ddetholus selectivist detholus selectivity detholedd selector detholydd (in general) selector dewiswr (in sport) selectors detholydd (in general) selectors dewiswr (in sport) selenium seleniwm (Se) seleniums seleniwm (Se) self hunan self-acting hunanweithredu (function of a centre lathe) self-action hunanweithredol self-adhesive hunanadlynol self-administration hunan-roi self-appraisal hunanwerthusiad self-appraisals hunanwerthusiad self-assessment hunanasesiad self-assessments hunanasesiad self-awareness hunanymwybyddiaeth self-care hunanofal self-cares hunanofal self-centering chuck crafanc hunanganoli self-centering chucks crafanc hunanganoli self-cleaning hunanlanhau self-concept hunangysyniad self-concepts hunangysyniad self-confidence hunanhyder self-confidences hunanhyder self-conscious hunanymwybodol self-contained hunangynhaliol self-control hunanreolaeth self-controls hunanreolaeth self-defence hunanamddiffyniad self-defences hunanamddiffyniad self-denial hunanymwadiad self-denials hunanymwadiad self-differentiation hunan wahaniaethiad self-differentiations hunan wahaniaethiad self-disclosure hunanddatgelu self-efficacy hunaneffeithiolrwydd self-employed hunangyflogedig self-esteem hunan-barch self-esteems hunan-barch self-examination hunanarchwiliad self-examinations hunanarchwiliad self-fertilization hunan ffrwythloniad self-fertilizations hunan ffrwythloniad self-government hunanlywodraeth self-governments hunanlywodraeth self-gratification hunanfoddhad self-gratifications hunanfoddhad self-grip wrench tyndro hunanafael self-grip wrenches tyndro hunanafael self-help hunangymorth self-help group grŵp hunangymorth self-help groups grŵp hunangymorth self-helps hunangymorth self-image hunanddelwedd self-images hunanddelwedd self-interest hunan-les self-interests hunan-les self-inverse element elfen hunanwrthdro self-inverse elements elfen hunanwrthdro self-medication hunanddosio self-pollination hunanbeilliad self-pollinations hunanbeilliad self-portrait hunanbortread self-portraits hunanbortread self-protection hunanamddiffyniad self-protections hunanamddiffyniad self-raising flour blawd codi self-raising flours blawd codi self-referral hunangyfeirio self-service store siop hunanwasanaeth self-service stores siop hunanwasanaeth self-serving attribution bias tuedd priodoliad hunangyflenwol self-sterilization hunan anffrwythloniad self-sterilizations hunan anffrwythloniad self-study materials adnoddau astudio unigol self-sufficiency hunanddigonedd self-sufficiency hunangynhaliaeth self-sufficient hunangynhaliol self-tapping screw sgriw hunandapio self-tapping screws sgriw hunandapio selfs hunan selihot selihot seller gwerthwr sellers gwerthwr selling cost cost gwerthu selling costs cost gwerthu selling price pris gwerthu selling prices pris gwerthu selva selfa selvage selfais selvage thread edau selfais selvage threads edau selfais selvages selfais selvas selfa semantics semanteg semaphore semaffor semaphores semaffor semen semen semens semen semi rhannol semi abstract lled haniaethol semi chorus rhangor semi permeable lledathraidd semi-arid lletgras semi-automatic lled awtomatig semi-desert lled-ddiffeithwch semi-deserts lled-ddiffeithwch semi-detached house tŷ pâr semi-detached houses tŷ pâr semi-direct lighting golau lled uniongyrchol semi-direct lightings golau lled uniongyrchol semi-elliptic hanner eliptig semi-elliptical arch bwa hanner eliptig semi-elliptical arches bwa hanner eliptig semi-final cynderfynol semi-independent lled annibynnol semi-opaque rhannol ddi-draidd semi-opera lled opera semi-operas lled opera semi-permeable membrane pilen ledathraidd semi-permeable membranes pilen ledathraidd semi-retired wedi lled-ymddeol semi-sheer lled-dryloyw semi-skilled lled-fedrus semi-skilled craftsman crefftwr lled-fedrus semi-skilled craftsmans crefftwr lled-fedrus semi-skilled labour llafur lled-grefftus semi-skilled labours llafur lled-grefftus semi-skilled worker gweithiwr lled-grefftus semi-skilled workers gweithiwr lled-grefftus semi-submerged lled soddedig semi-vertical hanner fertigol semicircle hanner cylch semicircles hanner cylch semicircular hanner crwn semicircular arch bwa hanner crwn semicircular arches bwa hanner crwn semicircular canal tiwb hanner cylch (in the inner ear) semicircular canals tiwb hanner cylch (in the inner ear) semicolon hanner colon semicolons hanner colon semiconductor lled-ddargludydd semiconductors lled-ddargludydd semilunar valve falf gilgant semilunar valves falf gilgant seminal semenol seminal fluid hylif semenol seminal fluids hylif semenol seminal vesicle fesigl semenol seminal vesicles fesigl semenol seminary coleg offeiriadol seminiferous tubule tiwbyn semen seminiferous tubules tiwbyn semen semiology semioleg semiquaver hanner cwafer semiquavers hanner cwafer semitonal hanner tonol semitone hanner tôn semitones hanner tôn senate senedd senates senedd senator seneddwr senators seneddwr send anfon send off anfon o'r cae senescence heneiddedd senescences heneiddedd senescent heneiddol seneschal senysgal seneschals senysgal senile dementia gorddryswch henaint senile dementias gorddryswch henaint senile dune hen dwyn senile dunes hen dwyn senior lecturer uwch ddarlithydd senior lecturers uwch ddarlithydd senior management uwch reolwyr senior mentor uwch fentor senior mentors uwch fentor sensation synhwyriad (in biology) sensation teimlad (=feeling) sensations synhwyriad (in biology) sensations teimlad (=feeling) sense cyfeiriad (plus and minus etc) sense synnwyr (of bodily faculties) sense ystyr (=meaning) sense of rhythm ymdeimlad â rhythm sense of touch synnwyr cyffwrdd sense organ organ synhwyro sense organs organ synhwyro senses cyfeiriad (plus and minus etc) senses synnwyr (of bodily faculties) senses ystyr (=meaning) sensibility synwyrusrwydd sensing synhwyro sensitive sensitif sensitive drilling machine peiriant drilio sensitif sensitive drilling machines peiriant drilio sensitif sensitive feed porthiant sensitif sensitive feeds porthiant sensitif sensitivity sensitifedd (in mathematics and biology) sensitivity sensitifrwydd (in general) sensor synhwyrydd sensors synhwyrydd sensory synhwyraidd sensory deprivation amddifadu'r synhwyrau sensory disability anabledd synhwyraidd sensory motor intelligence deallusrwydd echddygol synhwyraidd sensory motor intelligences deallusrwydd echddygol synhwyraidd sensory nerve nerf synhwyraidd sensory nerves nerf synhwyraidd sensory-motor synhwyraidd-weithredol sentence brawddeg (=set of words) sentence dedfryd (=decision of law court) sentence dedfrydu sentences brawddeg (=set of words) sentences dedfryd (=decision of law court) sentencing option opsiwn dedfrydu sentencing options opsiwn dedfrydu sentimental sentimental sepal sepal sepals sepal separable gwahanadwy separate ar wahân separate gwahanu separate compartments adrannau ar wahân separate out didoli (animals, information) separate parts rhannau ar wahân separate piece darn ar wahân separate pieces darn ar wahân separated gwahanedig separates amrywion separating funnel twndis gwahanu separating funnels twndis gwahanu separating hyperplane hyperplân sy'n gwahanu separating hyperplanes hyperplân sy'n gwahanu separation gwahaniad separation into spherical polars gwahaniad i begynliniau sfferig separation of powers gwahaniad pwerau separations gwahaniad separatism ymwahaniaeth separatisms ymwahaniaeth separatist ymwahanwr separatists ymwahanwr separator ymwahanydd separators ymwahanydd sepia sepia septet seithawd septets seithawd septic tank tanc septig septic tanks tanc septig septum gwahanfur septums gwahanfur septuplet seithpled septuplets seithpled sequence dilyniant sequence generator generadur dilyniant sequence generators generadur dilyniant sequence of images cyfres o ddelweddau sequence of instructions dilyniant o gyfarwyddiadau sequence of movements dilyniant o symudiadau sequence of operations trefn y gweithrediadau sequences dilyniant sequential dilyniannol sequential access cyrchiad dilyniannol sequential access file ffeil cyrchu dilyniannol sequential access files ffeil cyrchu dilyniannol sequential control rheolaeth ddilyniannol sequential controls rheolaeth ddilyniannol sequential file ffeil ddilyniannol sequential files ffeil ddilyniannol sequential process proses ddilyniannol sequential search chwiliad dilyniannol sequential searches chwiliad dilyniannol sequester atafaelu sequestrant secwestrydd sequestrants secwestrydd sequestration atafaeliad sequestrations atafaeliad sequestrator atafaelwr sequestrators atafaelwr sequin secwin sequins secwin serac serac seracs serac sere dilyniant serenade serenadu serenade serenâd serenades serenâd seres dilyniant serf taeog serfdom taeogaeth serfdoms taeogaeth serfs taeog serge serge sergeant rhingyll (in modern usage) sergeant-at-arms sarsiant wrth arfau sergeant-at-law sarsiant wrth gyfraith sergeant-at-laws sarsiant wrth gyfraith sergeant-major uwch-ringyll sergeant-majors uwch-ringyll sergeantry sarsiantaeth sergeants rhingyll (in modern usage) serges serge serial cyfres serial cyfresol serial access cyrchiad cyfresol serial access cyrchu cyfresol serial adder adydd cyfresol serial adders adydd cyfresol serial drama drama gyfres serial dramas drama gyfres serial interface rhyngwyneb cyfresol serial interfaces rhyngwyneb cyfresol serial port porth cyfresol serial ports porth cyfresol serial transfer trosglwyddiad cyfresol serial transfers trosglwyddiad cyfresol serialism cyfresiaeth serialisms cyfresiaeth serialize cyfresu serials cyfres sericulture sidaniaeth sericultures sidaniaeth series cyfres series circuit cylched gyfres series circuits cylched gyfres series of airs gosteg (in penillion singing) series resonant circuit cylched gysain gyfres series resonant circuits cylched gysain gyfres series wound dirwyniad cyfres series wounds dirwyniad cyfres serif seriff serif font ffont seriff serif fonts ffont seriff serifs seriff serigraphy printio â sgrin sidan serine serin serines serin sermon pregeth sermons pregeth serous serws serous membrane pilen serws serous membranes pilen serws serpentine dolennog serpentine sarff-faen serpentine front blaen dolennog serpentine fronts blaen dolennog serpentines sarff-faen serrated danheddog serrated edge ymyl ddanheddog serrated edges ymyl ddanheddog serrated jaw safn ddanheddog serrated jaws safn ddanheddog serum serwm serums serwm serve serf serve serfio (in tennis) serve pattern patrwm y serfio serve patterns patrwm y serfio server gweinydd (in general) server serfiwr (in tennis) servers gweinydd (in general) servers serfiwr (in tennis) serves serf service gwasanaeth service gwasanaethu service serfiad service and maintenance schedule manyleb cynnal a chadw service and maintenance schedules manyleb cynnal a chadw service area ardal wasanaeth service areas ardal wasanaeth service industry diwydiant gwasanaethu service provider darparwr gwasanaeth service providers darparwr gwasanaeth service road ffordd wasanaeth service roads ffordd wasanaeth service routine rheolwaith gwasanaethu service routines rheolwaith gwasanaethu services gwasanaeth services serfiad serving box sgwâr serfio serving boxes sgwâr serfio serving line llinell serfio serving lines llinell serfio serving square sgwâr serfio serving squares sgwâr serfio sesamum sesamwm sesamums sesamwm sessile digoes session sesiwn sessions sesiwn set gosod (tasks, homework etc) set set set setio (=place in sets) set a saw gosod llif set a table gosod bwrdd set book llyfr gosod set books llyfr gosod set dance dawns osod set dances dawns osod set of a saw gosodiad llif set of common values set o werthoedd cyffredin set of data set o ddata set of instructions set o gyfarwyddiadau set of objects set o wrthrychau set of punched cards set o gardiau tyllog set out trefnu set screw sgriw set set screws sgriw set set scrum sgrym osod set scrums sgrym osod set square sgwaryn set squares sgwaryn set task tasg osod set tasks tasg osod set to music gosod i gerddoriaeth set up cydosod (apparatus) set up conditions gosod amodau dechreuol set-in sleeve llawes osod set-in sleeves llawes osod set-on collar coler gosod set-on collars coler gosod setting gosodiad (in general) setting lleoliad (of a film, story) setting boundaries gosod ffiniau setting hammer morthwyl gosod setting hammers morthwyl gosod setting in a sleeve gosod llawes setting out foundations gosod seiliau settings gosodiad (in general) settings lleoliad (of a film, story) settle cyfanheddu settlement anheddiad (of place by people) settlement ardrefniant (=agreement) settlement gwladychiad (of new country) settlement setliad (of water treatment) settlement pattern patrwm anheddu settlement patterns patrwm anheddu settlements anheddiad (of place by people) settlements ardrefniant (=agreement) settlements gwladychiad (of new country) settlements setliad (of water treatment) settler cyfaneddwr settlers cyfaneddwr seven a side saith bob ochr seven yard line llinell seithlath seven yard lines llinell seithlath seven-segment display arddangosydd saith-segment seventh seithfed sevenths seithfed sever torri severe caled severe learning difficulty anhawster dysgu difrifol severe learning disability anabledd dysgu difrifol sew gwnïo sewa / seva sewa / seva sewa / sevas sewa / seva sewage carthion sewage works gwaith carthion sewerage carthffosiaeth sewerages carthffosiaeth sewing foot troed wnïo (of machine part) sewing foots troed wnïo (of machine part) sewing frame ffrâm wnïo sewing frames ffrâm wnïo sewing needle nodwydd wnïo sewing needles nodwydd wnïo sewing press gwasg wnïo sewing process proses wnïo sex rhyw sex rhywiol sex before marriage rhyw cyn priodas sex before marriages rhyw cyn priodas sex chromosome cromosom rhyw sex chromosomes cromosom rhyw sex discrimination camwahaniaethu ar sail rhyw (unfair) sex discrimination gwahaniaethu ar sail rhyw (in general) sex education addysg rhyw sex educations addysg rhyw sex linkage cysylltedd rhyw sex linkages cysylltedd rhyw sex linked rhyw-gysylltiedig sexagesimal secsagesimol sext secsdens sextant secstant sextants secstant sextet chwechawd sextets chwechawd sextic secstig sexton clochydd sextons clochydd sexts secsdens sextuplet chwephled sextuplets chwephled sexual rhywiol sexual abuse camdriniaeth rywiol sexual abuses camdriniaeth rywiol sexual intercourse cyfathrach rywiol sexual intercourses cyfathrach rywiol sexual reproduction atgenhedliad rhywiol sexual reproductions atgenhedliad rhywiol sexual selection detholiad rhywiol (as a count noun) sexual selections detholiad rhywiol (as a count noun) sexually transmitted disease clefyd cysylltiad rhywiol sexually transmitted diseases clefyd cysylltiad rhywiol sgraffito sgraffito shackle gefyn shackle pin pìn gefyn shackle pins pìn gefyn shackles gefyn shade cysgod (in drawing etc) shade cysgodlen (=object which gives shade) shade tywyllu (=darken) shades cysgod (in drawing etc) shades cysgodlen (=object which gives shade) shading graddliwio shadow cysgod shadow puppet pyped cysgod shadow puppets pyped cysgod shadow tuck twc cysgod shadow tucks twc cysgod shadow work cysgodwaith shadow works cysgodwaith shadows cysgod shaduf siadwff shadufs siadwff shaft coes (=handle) shaft siafft (in general) shafts coes (=handle) shafts siafft (in general) shag mulfran shags mulfran shake hollt (=split) shake ysgwyd shake hands ysgwyd llaw shake left hand ysgwyd llaw chwith shake right hand ysgwyd llaw dde shake-proof washer wasier wrthgryn shake-proof washers wasier wrthgryn shakes hollt (=split) shale siâl shales siâl shallow bas shallow basddwr shallow end of the bath pen bas y baddon shallow frying ffrio bas shallows basddwr shank garan shank and ring garan a chylch shanks garan shantung shantung shantungs shantung shanty town tref sianti shanty towns tref sianti shape siapio shape siâp shape designer dylunydd siâp shape designers dylunydd siâp shape work gwaith ar siâp shape works gwaith ar siâp shaped ffurfiedig shaped caul gwasgblat ffurfiedig shaped cauls gwasgblat ffurfiedig shaped facing wynebyn wedi'i siapio shaped facings wynebyn wedi'i siapio shaped front ffrynt ffurfiedig shaped fronts ffrynt ffurfiedig shaped leg coes siapog shaped legs coes siapog shaped stretchers estynwyr ffurfiedig shaper peiriant llunio (machine) shaper tools offer peiriant llunio shapers peiriant llunio (machine) shapes siâp shaping clay siapio clai shard darn crochenwaith shards darn crochenwaith share cyfranddaliad (stock market) share rhan (in general) share rhannu share capital cyfalaf cyfranddaliadau share capitals cyfalaf cyfranddaliadau share certificate tystysgrif cyfranddaliadau share certificates tystysgrif cyfranddaliadau share cropping cyfran-gnydio shared electrons electronau cydranedig shareholder cyfranddaliwr shareholder dividend buddran cyfranddalwyr shareholder dividends buddran cyfranddalwyr shareholders cyfranddaliwr shares cyfranddaliad (stock market) shares rhan (in general) sharp llym (in general) sharp uwchben y nodyn (when singing too high) sharp blade llafn llym sharp blades llafn llym sharp corner cornel lem sharp corners cornel lem sharp key crasgywair (in old Welsh music) sharp knife cyllell finiog sharp knifes cyllell finiog sharp point pwynt llym sharp points pwynt llym sharp switching action gweithrediad switsio cyflym iawn sharp value gwerth pendant sharp values gwerth pendant sharp-edged awchlym sharp-edged orifice flow meter mesurydd llif agorfa awchlym sharp-edged orifice flow meters mesurydd llif agorfa awchlym sharpen hogi sharpener hogwr sharpeners hogwr sharpening gwahaniaethu (exaggerating difference) sharpening angle ongl hogi sharpening angles ongl hogi sharpening bevel befel hogi sharpening bevels befel hogi shatter dryllio shave eillio shavings naddion shawl siôl shawls siôl shawm shawm shawms shawm sheaf ysgub sheafs ysgub shear cneifio (=cut sheep's wool) shear croeswasgiad (=strain produced by pressure) shear croeswasgu (=strain produced by pressure) shear torri (=cut off) shear strength cryfder croeswasgiad shear strengths cryfder croeswasgiad shearforce croesrym shearforce diagram diagram croesrym shearforce diagrams diagram croesrym shearforces croesrym shearing force croesrym shearing forces croesrym shearing machine peiriant llafnu shearing machines peiriant llafnu shearing stress diriant croesrym shears croeswasgiad (=strain produced by pressure) shears gwellaif sheath gwain sheaths gwain sheave olwyn bwli sheaves olwyn bwli shed stick ffon barthu shed sticks ffon barthu shedding parthiad sheddings parthiad sheen llewyrch sheens llewyrch sheep dafad sheep fold corlan sheep folds corlan sheep walk cynefin defaid sheep walks cynefin defaid sheeps dafad sheepskin croen dafad sheepskins croen dafad sheer tryloyw sheet cynfas (of bedlinen) sheet dalen (of paper) sheet llen (of ice, basalt, steel etc) sheet decking decin llen sheet deckings decin llen sheet erosion llen erydiad sheet erosions llen erydiad sheet flood llenlif sheet floods llenlif sheet metal llenfetel sheet metals llenfetel sheet metalwork gwaith llenfetel sheet metalworks gwaith llenfetel sheet of map dalen map sheet saw llif len sheet saws llif len sheet steel llenddur sheet steels llenddur sheet wash llen olchiad sheet washs llen olchiad sheet-feeder porthydd dalennau sheet-feeders porthydd dalennau sheeting defnydd cynfasau sheetings defnydd cynfasau sheets cynfas (of bedlinen) sheets dalen (of paper) sheets llen (of ice, basalt, steel etc) shelf silff shelf life oes silff shelf lifes oes silff shelf support cynhaliad silff shelf supports cynhaliad silff shelfs silff shell cragen (of shellfish, snails) shell plisgyn (of eggs, vegetables, electrons) shell and husk carving cerfiad cragen a phlisgyn shell and husk carvings cerfiad cragen a phlisgyn shell bit ebill cragen shell bits ebill cragen shell edging ymylwaith cragen shell edgings ymylwaith cragen shell milling cutter melinwr cragen shell milling cutters melinwr cragen shell tuck twc cragen shell tucks twc cragen shellac sielac shellac knotting cuddiwr ceinciau sielac shellac knottings cuddiwr ceinciau sielac shellac sealer seliwr sielac shellac sealers seliwr sielac shellac varnish farnais sielac shellac varnishs farnais sielac shellacs sielac shells cragen (of shellfish, snails) shells plisgyn (of eggs, vegetables, electrons) shelly cregynnog shelter lloches shelter belt llain gysgodi shelter belts llain gysgodi shelter seeking cysgotgar sheltered accommodation llety cysgodol sheltered accommodation unit uned llety cysgodol sheltered accommodation units uned llety cysgodol sheltered accommodations llety cysgodol sheltered housing cartrefi gwarchodol shelters lloches shepherd bugail shepherd bugeilio shepherd castor castor bugail shepherd castors castor bugail shepherds bugail sherardize sierardeiddio sheriff siryf sheriffs siryf shield tarian shield back chair cadair gefn tarian shield back chairs cadair gefn tarian shield boss bogail tarian shield volcano llosgfynydd tarian shields tarian shift syfliad (=displacement) shift syflyd (=displace) shift symud (=move) shift symudiad (=movement) shift in the demand curve newid yn y gromlin galw shift lock key clo cyfnewid shift register cofrestr syfliad shift registers cofrestr syfliad shift supervisor goruchwyliwr y shifft shift supervisors goruchwyliwr y shifft shifting cultivation triniad mudol shifting cultivations triniad mudol shifts syfliad (=displacement) shifts symudiad (=movement) shin crimog shin muscle cyhyryn y grimog shin muscles cyhyryn y grimog shine sglein shine sgleinio (of polished objects) shines sglein shingle estyllen do (=roof tile) shingle graean bras (=pebbles) shingles estyllen do (=roof tile) shingles graean bras (=pebbles) shins crimog shiny paper papur sglein shiny papers papur sglein shiny solids solidau sgleiniog ship cludo mewn llong ship yard iard llongau ship yards iard llongau shipment llwyth llong shipments llwyth llong shipping llongau shire sir (in Wales) shire swydd (in England) shire fee ffi sir shire fees ffi sir shires sir (in Wales) shires swydd (in England) shirk shirk shirks shirk shirr cygrychu shirring elastic elastig cygrychu shirring elastics elastig cygrychu shirt crys shirt button botwm crys shirt buttons botwm crys shirt collar coler crys shirt collars coler crys shirts crys shiver crynu shoal basle (=shallow place in sea) shoal haig (of fish) shoals basle (=shallow place in sea) shoals haig (of fish) shock sioc shock absorber sioc laddwr shock absorbers sioc laddwr shocks sioc shoddy brethyn eilban shoe esgid shoes esgid shoot blaguryn shoot cyffyn (of plant) shoot saethu (with gun etc) shooting board bwrdd plaenio shooting boards bwrdd plaenio shooting circle cylch saethu shooting circles cylch saethu shooting line llinell saethu shooting lines llinell saethu shoots blaguryn shoots cyffyn (of plant) shop siop shop assistant gweithiwr siop shop assistants gweithiwr siop shop conversion trawsnewid siop shop front level lefel ffrynt siopau shop front levels lefel ffrynt siopau shop manager rheolwr siop shop managers rheolwr siop shop steward swyddog undeb shop stewards swyddog undeb shop-soiled goods nwyddau wedi'u baeddu yn y siop shops siop shore ateg (=prop) shore glan (of sea etc) shores ateg (=prop) shores glan (of sea etc) short back bacon cig moch cefn short back bacons cig moch cefn short circuit cylched fer short circuits cylched fer short clap clapio swta short corner cornel fer short corners cornel fer short dance dawns fer short dances dawns fer short distance pellter byr short distances pellter byr short division rhannu byr short eared owl tylluan glustiog short eared owls tylluan glustiog short grain graen byr short grains graen byr short haul destination canolfan wyliau tramor agos short haul destination cyrchfan pellter byr short haul destinations canolfan wyliau tramor agos short haul destinations cyrchfan pellter byr short haul market marchnad cyrchfannau agos short haul markets marchnad cyrchfannau agos short hurdle race ras clwydi byr short hurdle races ras clwydi byr short leaf dalen fer short leafs dalen fer short leg coeswr agos short legs coeswr agos short line llinell fer short lines llinell fer short mid wicket canolwr wiced agos short mid wickets canolwr wiced agos short nose pliers gefelen drwyn byr short pitch nail hoelen bitsh byr short pitch nails hoelen bitsh byr short pitched delivery pêl fer short punch dyrnod bwt short punches dyrnod bwt short race ras fer short races ras fer short range plane awyren taith fer short range planes awyren taith fer short relay race ras gyfnewid fer short relay races ras gyfnewid fer short route llwybr byr short routes llwybr byr short run rhediad byr short runs rhediad byr short score sgôr fer short scores sgôr fer short series of movements cyfres fer o symudiadau short service serfiad byr short services serfiad byr short sight golwg byr short sights golwg byr short square leg coeswr byr sgwâr short square legs coeswr byr sgwâr short stop ataliwr short stops ataliwr short taper tapr byr short tapers tapr byr short term change newid tymor byr short term changes newid tymor byr short time amser byr short times amser byr short volley foli gwta short waisted byrwasg short-answer question cwestiwn ateb byr short-answer questions cwestiwn ateb byr short-term tymor byr short-term care gofal tymor byr short-term cares gofal tymor byr short-term effect effaith tymor byr short-term effects effaith tymor byr shortbread biscuit teisen Berffro shortbread biscuits teisen Berffro shorten cwtogi (a dress etc) shorten a pattern byrhau patrwm shortened form byrfodd shortened forms byrfodd shortest generator generadur byrraf shortest generators generadur byrraf shortest route llwybr byrraf shortest routes llwybr byrraf shortfall diffyg shortfalls diffyg shortie pyjamas pyjamas cwta shortlist rhestr fer shortlists rhestr fer shorts siorts shot ergyd (with ball, gun etc) shot pwysau (=heavy ball in athletics) shot saethiad (in a film) shot of steam iron haearn â chwythell ager shotgun dryll shotguns dryll shots ergyd (with ball, gun etc) shots saethiad (in a film) shoulder ysgwydd (of person, bat, harp etc) shoulder ysgwyddo shoulder blade palfais shoulder blades palfais shoulder carry cario ar ysgwydd shoulder charge hyrddiad ysgwydd shoulder charges hyrddiad ysgwydd shoulder girdle gwregys yr ysgwydd shoulder girdles gwregys yr ysgwydd shoulder line llinell ysgwydd shoulder lines llinell ysgwydd shoulder pad pad ysgwydd shoulder pads pad ysgwydd shoulder pass pàs o'r ysgwydd shoulder plane plaen ysgwydd shoulder planes plaen ysgwydd shoulder strap strap ysgwydd shoulder straps strap ysgwydd shouldered dowel hoelbren ysgwyddog shouldered dowels hoelbren ysgwyddog shoulders ysgwydd (of person, bat, harp etc) shovel rhaw shovels rhaw show sioe show clipboard dangos clipfwrdd show invisibles dangos anweledigion show page guides dangos canllawiau tudalen show ruler dangos mesurydd shower cawod shower bath baddon cawod shower baths baddon cawod shower-proof gwrthgawod (finish) showers cawod shows sioe shred carpio shred cerpyn shredded paper carpion papur shreds cerpyn shrew chwistlen shrews chwistlen shrievalty siryfiaeth shrine creirfa (for relics) shrine cysegr (in general) shrines creirfa (for relics) shrines cysegr (in general) shrink crebachu (=shrivel) shrink culhau (=narrow) shrink pannu (of textiles) shrink fit ffitio poeth shrink wrapping lapio poeth shrink-resistant gwrthbannu (finish) shrinkage culhad shrinkage allowance lwfans culhad shrinkage allowances lwfans culhad shrinkage plate plât culhad shrinkage plates plât culhad shrinkages culhad shroud panel panel gordo shroud panels panel gordo shrouds rhaffau mast shrub llwyn shrubs llwyn shunt siynt shunt wound siyntweindiog shunts siynt shutter caead shuttering caeedydd shutterings caeedydd shutters caead shuttle gwennol shuttle bobbin bobin gwennol shuttle bobbins bobin gwennol shuttle relay race ras gyfnewid nôl a mlaen shuttle relay races ras gyfnewid nôl a mlaen shuttlecock gwennol shuttlecocks gwennol shuttles gwennol sibling brawd neu chwaer siccative sychydd siccatives sychydd sick gwael (=ill) sick-role behaviour ymddygiad rôl-salwch sick-role behaviours ymddygiad rôl-salwch sickle cryman sickle cell anaemia anaemia cryman-gell sickle cell anaemias anaemia cryman-gell sickles cryman sickness benefit budd-dal afiechyd sickness benefits budd-dal afiechyd side ochr side and face milling cutter melinwr ochr ac wyneb side and face milling cutters melinwr ochr ac wyneb side by side ochr yn ochr side clearance cliriad ochr side clearances cliriad ochr side cutting pliers gefel ochr dorri side drum drwm ochr side drums drwm ochr side elevation ochrolwg side elevations ochrolwg side left i'r ochr chwith side of the racket ochr y raced side product sgil gynnyrch side products sgil gynnyrch side rabbet plane plaen rabad ochr side rabbet planes plaen rabad ochr side rail rheilen ochr side rails rheilen ochr side rake gwyredd ochr side rakes gwyredd ochr side right i'r ochr dde side seam pocket poced sêm ochr side seam pockets poced sêm ochr side serving line llinell serfio ochr side serving lines llinell serfio ochr side support ymgynnal ochr (in athletics) side table bwrdd ochr side tables bwrdd ochr side tool erfyn ochr side tools erfyn ochr side valve falf ochr side valves falf ochr side vault llofnaid ochrol side vaults llofnaid ochrol side view ochrolwg side views ochrolwg side wall mur ochr side wall out of court line ffin ochr side walls mur ochr side-block tackle tacl floc o'r ochr side-block tackles tacl floc o'r ochr side-cutters torrell ochr side-cutting ochr-dorri side-cutting pliers gefelen ochr-dorri side-effect sgil effaith side-effects sgil effaith side-mouth tongs gefel gegochr side-step cam i'r ochr side-step ochrgamu side-steps cam i'r ochr sideboard seld sideboards seld sided ochrog sidefoot ochr y droed sidefoots ochr y droed sideline llinell ochr sidelines llinell ochr sidereal day diwrnod sêr sidereal time amser y sêr sidereal times amser y sêr sidereal year blwyddyn serol sidereal years blwyddyn serol sides ochr sidespin troelli ochr y bêl sidestroke nofio ar yr ochr sideways i'r ochr sideways RAM RAM ochr sideways ROM ROM ochr sideways pressure gwasgedd ochrol sideways pressures gwasgedd ochrol sideways-upward i'r ochr ac i fyny siding lein aros sidings lein aros siege gwarchae sieges gwarchae sieve gogr sieve gogru sieve plate plât hidlo sieve plates plât hidlo sieves gogr sieving brush brwsh rhidyllu sieving brushs brwsh rhidyllu sift rhidyllu sifted sand tywod wedi'i ridyllu sifted sands tywod wedi'i ridyllu sifter rhidyll sifter jar jar ridyllu sifter jars jar ridyllu sifters rhidyll sight golwg sight rail alidad sight singing canu ar yr olwg gyntaf sights golwg sign arwydd sign and magnitude code cod maint ac arwydd sign and magnitude codes cod maint ac arwydd sign bit did arwydd sign bits did arwydd sign extension estyniad arwydd sign extensions estyniad arwydd sign language arwyddiaith sign language iaith arwyddion sign languages arwyddiaith sign languages iaith arwyddion sign painting paentiad arwydd (of painted picture) sign painting peintio arwydd (of process or art) sign paintings paentiad arwydd (of painted picture) signal arwydd (non-technical) signal signal (mechanical, electrical etc) signal generator generadur signalau signal generators generadur signalau signals arwydd (non-technical) signals signal (mechanical, electrical etc) signatory llofnodydd signature arwydd (of key or time) signatures arwydd (of key or time) signed wedi'i arwyddo (in maths, physics with masculine nouns) signed wedi'i harwyddo (in maths, physics with feminine nouns) signed wedi'i llofnodi (with handwritten name with feminine nouns) signed wedi'i lofnodi (with handwritten name with masculine nouns) signed integer cyfanrif arwyddedig signed integers cyfanrif arwyddedig signed language iaith arwyddion signed languages iaith arwyddion significance arwyddocâd significance level lefel arwyddocâd significance levels lefel arwyddocâd significances arwyddocâd significant arwyddocaol (in general) significant ystyrlon (of figures) significant difference gwahaniaeth arwyddocaol significant differences gwahaniaeth arwyddocaol significant figure ffigur ystyrlon significant figures ffigur ystyrlon significant testing profi ystyrlon signified arwyddedig (of image) signifieds arwyddedig (of image) signifier arwyddwr (of image or word) signifiers arwyddwr (of image or word) signing arwyddo (in sign language) signs arwydd signs of the Zodiac arwyddion y Sidydd signum signwm signums signwm silence distawrwydd silencer tawelydd silencers tawelydd silences distawrwydd silhouette silwét silhouettes silwét silica silica silica gel silica sychu silica gels silica sychu silicas silica silicate silicad silicates silicad silicon silicon (Si) silicon carbide paper papur silicon carbid silicon carbide papers papur silicon carbid silicon crucible crwsibl silicon silicon crucibles crwsibl silicon silicon dioxide silicon deuocsid silicon dioxides silicon deuocsid silicone silicôn (compounds) silicone polish llathrydd silicôn silicone polishs llathrydd silicôn silicone spray chwistrelliad silicôn silicones silicôn (compounds) silicons silicon (Si) siliqua silicwa siliquas silicwa silk sidan silk finish paper papur sglein sidan silk finish papers papur sglein sidan silk-screen printing printio â sgrin sidan silks sidan silkscreen sgrin sidan silkscreen process proses sgrin sidan silkscreens sgrin sidan silkworm pryf sidan silkworms pryf sidan sill sil sills sil silly mid-off mentrwr agored silly mid-offs mentrwr agored silly mid-on mentrwr coes silly mid-ons mentrwr coes silt silt silt siltio silt stone carreg silt silt stones carreg silt silts silt silver arian silver foil ffoil arian silver foils ffoil arian silver grain graen arian (oak) silver grains graen arian (oak) silver money arian gwynion silver nitrate arian nitrad silver nitrates arian nitrad silver plate plât arian silver plates plât arian silver solder sodr arian silver soldering ariansodro silver solders sodr arian silver steel dur arian silver steels dur arian silver tooling leaf dalen offer arian silver tooling leafs dalen offer arian silver-braze arianbresyddu silvers arian silversmith gof arian silversmithing operations gweithrediadau gofannu arian silversmiths gof arian similar cyflun (in mathematics) similar tebyg (in general) similar ability gallu cyffelyb similar figure ffigur cyflun (in mathematics) similar figures ffigur cyflun (in mathematics) similar triangles trionglau cyflun similarities nodweddion sy'n debyg (in general) similarity cyflunedd (in mathematics) similarity tebygrwydd (in general) similarity of colour tebygrwydd lliw similarity of tone tebygrwydd tôn similitude cyfluniant similitudes cyfluniant simoniac seimonydd simoniacal seimonaidd simoniacs seimonydd simonist seimonwr simonists seimonwr simony seimoniaeth simoom simwm simooms simwm simple syml simple a.c. generator generadur cerrynt eiledol simple a.c. generators generadur cerrynt eiledol simple accompaniment cyfeiliant syml simple accompaniments cyfeiliant syml simple action gweithred syml simple actions gweithred syml simple attack ymosod syml simple attacks ymosod syml simple camera camera syml simple cameras camera syml simple circuit cylched syml simple circuits cylched syml simple dance dawns syml simple dances dawns syml simple drive gyriad syml simple drives gyriad syml simple equation hafaliad syml simple equations hafaliad syml simple fee ffi rydd simple fees ffi rydd simple form ffurf syml simple forms ffurf syml simple fraction ffracsiwn syml simple fractions ffracsiwn syml simple fracture torasgwrn syml simple fractures torasgwrn syml simple harmonic harmonig syml simple harmonic motion mudiant harmonig syml simple harmonic motions mudiant harmonig syml simple harmonics harmonig syml simple instrument offeryn syml simple instruments offeryn syml simple interest llog syml simple interests llog syml simple linear simultaneous equations hafaliadau cydamserol llinol syml simple melody alaw syml simple movement symudiad syml simple movement phrase cymal syml o symudiadau simple movement phrases cymal syml o symudiadau simple movements symudiad syml simple parry pario syml simple pattern patrwm syml simple patterns patrwm syml simple pendulum pendil syml simple pendulums pendil syml simple pits mân-bantiau syml simple plain brace carntro cyffredin simple plain braces carntro cyffredin simple rhyme rhigwm syml simple rhymes rhigwm syml simple rhythm rhythm syml simple rhythmic response ymateb rhythmig syml simple rhythmic responses ymateb rhythmig syml simple rhythms rhythm syml simple rondo rondo syml simple shape siâp syml simple shapes siâp syml simple sketch braslun syml simple sketches braslun syml simple song cân syml simple songs cân syml simple technical language iaith dechnegol syml simple technical languages iaith dechnegol syml simple text testun syml simple texts testun syml simple train trên syml simple trains trên syml simplest form ffurf symlaf simplest forms ffurf symlaf simplest formula fformiwla symlaf simplest formulas fformiwla symlaf simplex simplecs simplexes simplecs simplicity symlrwydd simplification symleiddiad simplifications symleiddiad simplified symledig simplified version fersiwn syml simplified versions fersiwn syml simplify symleiddio simply supported beam trawst wedi'i gynnal yn syml simply supported beams trawst wedi'i gynnal yn syml simulate efelychu simulated ffug simulation efelychiad simulations efelychiad simulator efelychydd simulators efelychydd simultaneous cydamserol simultaneous equations hafaliadau cydamserol simultaneous translation cyfieithu ar y pryd sin pechod sin pechu sine sin (sin) sine wave ton sin sine waves ton sin sinecure segurswydd sinecures segurswydd sines sin (sin) sinew gewyn sinews gewyn sinewy gewynnol (=ligamentous) sinfonia sinffonia sinfonias sinffonia sinfonietta sinffonieta sinfoniettas sinffonieta sing canu sing a round canu tôn gron sing songs canu caneuon sing to the accompaniment of the harp canu gyda'r tannau singable canadwy singer cantores (female) singer canwr (male) singers cantores (female) singers canwr (male) singing the rhyme canu'r rhigwm single sengl single European currency arian cyfred Ewropeaidd sengl single action harp telyn arwaith sengl single action harps telyn arwaith sengl single celled ungellog single circle cylch sengl single circles cylch sengl single cream hufen sengl single creams hufen sengl single currency arian sengl single density dwysedd sengl single digit multiples lluosrifau un-digid single distribution dosbarthiad sengl single distributions dosbarthiad sengl single faggot stitch pwyth ffagod sengl single faggot stitches pwyth ffagod sengl single gate-leg bwrdd coes gât sengl single gate-legs bwrdd coes gât sengl single layer chipboard bwrdd sglodion haen sengl single layer chipboards bwrdd sglodion haen sengl single open-end spanner sbaner ceg agored sengl single open-end spanners sbaner ceg agored sengl single parent rhiant sengl single parents rhiant sengl single quote dyfynnod sengl single quotes dyfynnod sengl single roof to sengl single roofs to sengl single section book llyfr un-darn single section books llyfr un-darn single seeded unhadog single seeded succulent fruit ffrwythyn suddlon unhadog single seeded succulent fruits ffrwythyn suddlon unhadog single set set sengl single sets set sengl single sex un rhyw single sheet cynfas sengl single sheets cynfas sengl single spacing bylchiad sengl single take-off esgyn untroed single thread edau sengl single threads edau sengl single tonguing tafodi sengl single tub machine peiriant twb sengl single tub machines peiriant twb sengl single turning troad sengl single turnings troad sengl single weight pwysyn single weights pwysyn single-breasted coat cot â chaead sengl single-breasted coats cot â chaead sengl single-coil lamp lamp coil sengl single-coil lamps lamp coil sengl single-cut file ffeil toriad sengl single-cut files ffeil toriad sengl single-lap tile teilsen lap sengl single-lap tiles teilsen lap sengl single-section un-darn single-sections un-darn single-sheet dalen sengl single-step camu single-track untrac single-valued unwerth singles senglau singular hynod (e.g. matrix) singular matrix matrics hynod singular matrixes matrics hynod singularity hynodyn sinh sinh sinhs sinh sink sinc (for washing) sink suddo sink hole llync-dwll sink holes llync-dwll sinking and matting punch pwnsh suddo a matio sinking and matting punches pwnsh suddo a matio sinking fund cronfa ad-dalu sinking funds cronfa ad-dalu sinking hammer morthwyl suddo sinking hammers morthwyl suddo sinking of the Lusitania suddo'r Lusitania sinks sinc (for washing) sinter sinter sinter sinteru sinters sinter sinuosity dolennedd sinus sinws sinusoid sinwsoid sinusoidal sinwsoidaidd sinusoidal alternating potential difference gwahaniaeth potensial eiledol sinwsoidaidd sinusoidal alternating potential differences gwahaniaeth potensial eiledol sinwsoidaidd sinusoidal waveform tonffurf sinwsoidaidd sinusoidal waveforms tonffurf sinwsoidaidd sinusoids sinwsoid siphon siffon siphons siffon sirocco siroco sister prif weinyddes nyrsio (in nursing) sisters prif weinyddes nyrsio (in nursing) sit sefyll (an examination) sitar sitar sitars sitar site safle site conditions cyflwr safle site evaluation gwerthusiad safle site evaluation procedure trefn o werthuso safle site evaluation procedures trefn o werthuso safle site evaluations gwerthusiad safle sites safle situation sefyllfa situation ethics moeseg sefyllfa situational attribution priodoliad sefyllfaol situations sefyllfa six chwech six-figure grid references cyfeirnodau grid chwe-ffigur sixteen yard hit-out ergyd gylch sixteen yard hit-outs ergyd gylch sixth chweched sixth form chweched dosbarth sixth former disgybl chweched dosbarth sixth formers disgybl chweched dosbarth sixth forms chweched dosbarth sixth sense chweched synnwyr sixth senses chweched synnwyr sixth-form college coleg chweched dosbarth sixth-form colleges coleg chweched dosbarth sixths chweched sixty-fourth-note nodyn chwe deg pedwar sixty-fourth-notes nodyn chwe deg pedwar sixway punch pwnsh chweffordd sixway punches pwnsh chweffordd size maint (=extent of a thing) size seis (=gelatinous solution) size seisio (glue) sizes maint (=extent of a thing) sizes seis (=gelatinous solution) skating bonynnu (canework) skein sgein skeins sgein skeletal system system ysgerbydol skeletal systems system ysgerbydol skeletal traction hydyniad ar yr ysgerbwd skeletal tractions hydyniad ar yr ysgerbwd skeleton ysgerbwd skeleton framework bras fframwaith skeleton frameworks bras fframwaith skeleton score sgôr fras skeleton scores sgôr fras skeleton weeds chwyn ysgerbwd skeletons ysgerbwd skerry sgeri sketch braslun (=rough draft) sketch braslunio sketch darlun (of composition) sketch block bloc cynllunio sketch blocks bloc cynllunio sketch map llinfap sketch maps llinfap sketch of elevation braslun golwg sketch of point of detail braslun pwynt manylyn sketch pad pad braslunio sketch pads pad braslunio sketch paper papur braslunio sketch papers papur braslunio sketch plan braslun cynllunio sketch plans braslun cynllunio sketch section llindoriad sketch sections llindoriad sketch-book llyfr braslunio sketch-books llyfr braslunio sketches braslun (=rough draft) sketches darlun (of composition) sketching charcoal siarcol braslunio sketching charcoals siarcol braslunio sketching easel îsl braslunio sketching easels îsl braslunio skew sgiw skew chisel cŷn goledd skew chisels cŷn goledd skew line llinell sgiw skew lines llinell sgiw skew mouth plane plaen ceg sgiw skew mouth planes plaen ceg sgiw skew nailing hoelio arosgo skewness sgiwedd skews sgiw skilful medrus skilful movement symud medrus skill sgìl skill mix cymysgedd o sgiliau skill mixes cymysgedd o sgiliau skilled medrus skilled craftsman crefftwr medrus skilled craftsmans crefftwr medrus skilled labour llafur crefftus skilled labours llafur crefftus skilled worker gweithiwr medrus skilled workers gweithiwr medrus skills sgìl skills in measuring sgiliau mesur skills of water safety sgiliau diogelwch yn y dŵr skim sgimio skimmer sgimiwr skimmers sgimiwr skimming price pris hufennu skimming prices pris hufennu skin croen skin care gofal croen skin cares gofal croen skin traction hydyniad ar y croen skin tractions hydyniad ar y croen skins croen skip sgip skip sgipio skip jump naid sgip skip jumps naid sgip skip step step sgip skip steps step sgip skipped stitch pwyth coll skipped stitches pwyth coll skipping dance dawns sgipio skipping dances dawns sgipio skipping rope rhaff sgipio skipping ropes rhaff sgipio skips sgip skirmish ysgarmes skirmishs ysgarmes skirt sgert skirting sgyrtin skirting board bwrdd sgyrtin skirting boards bwrdd sgyrtin skirtings sgyrtin skirts sgert skittle ceilysyn skittles ceilysyn skiver sgifer skivers sgifer skiving knife cyllell sgifio skiving knifes cyllell sgifio skua sgiwen skuas sgiwen skull penglog skulls penglog skunk drewgi skunks drewgi sky blue glas y nen (enamelling colour) sky blues glas y nen (enamelling colour) skylight ffenestr do skylights ffenestr do slab slab slab milling cutter melinwr slab slab milling cutters melinwr slab slab pottery crochenwaith slab slabs slab slack glo mân (=small coal) slack llac slack llacio slack fit ffit lac slack fits ffit lac slack tide slac-lanw slack tides slac-lanw slack variable newidyn llacrwydd slack variables newidyn llacrwydd slacken llacio (ligament) slackness llacrwydd slacks glo mân (=small coal) slag slag slags slag slake slecio (lime) slaked lime calch tawdd slaked limes calch tawdd slalom slalom slaloms slalom slander athrod slander athrodi slanders athrod slant goledd slant goleddu slant edge ymyl oledd slant edges ymyl oledd slant height uchder oledd slant heights uchder oledd slanting ar oledd slants goledd slash slaes slash slaesu slash sawn tangiad llifiol slashs slaes slat slat slate llechen (for roofing, writing) slate llechfaen (rock) slate nail hoelen lechen slate nails hoelen lechen slates llechen (for roofing, writing) slates llechfaen (rock) slats slat slave caethwas slave trade masnach gaethion slave trades masnach gaethion slavery caethwasiaeth slaves caethwas sledge hammer gordd sledge hammers gordd sleep wall wal gynnal sleep walls wal gynnal sleeping-bag sach gysgu sleeping-bags sach gysgu sleet eirlaw sleets eirlaw sleeve llawes sleeve board bwrdd llawes sleeve boards bwrdd llawes sleeveless dilawes sleeves llawes sleigh bells clychau car llusg slice sleis slice tafell slice tafellu slices sleis slices tafell slicing action arwaith tafellu slicing actions arwaith tafellu slick bit ebill slic slick bits ebill slic slickensides llyfnochrau slide llithr slide llithro slide llithryn (in music) slide sleid (for microscope) slide tryloywder (for projector) slide rest rest llithr slide rests rest llithr slide rule llithriwl slide rules llithriwl slide sequence dilyniant sleidiau slide sequences dilyniant sleidiau slide valve falf lithr slide valves falf lithr slide-frame transition trosi rhwng fframiau slider llithrydd sliders llithrydd slides llithryn (in music) slides sleid (for microscope) slides tryloywder (for projector) sliding llithr sliding action arwaith llithr sliding actions arwaith llithr sliding bevel befel llithr sliding bevels befel llithr sliding block bloc llithr sliding blocks bloc llithr sliding component cydran lithr sliding components cydran lithr sliding door drws llithro sliding doors drws llithro sliding feed porthiant llithr sliding feeds porthiant llithr sliding fence ffens lithr sliding fences ffens lithr sliding fit ffit lithr (transition fit) sliding fits ffit lithr (transition fit) sliding friction ffrithiant llithro sliding frictions ffrithiant llithro sliding jaw safn lithr sliding jaws safn lithr sliding key allwedd lithr sliding scale graddfa symudol sliding scales graddfa symudol sliding seat sedd lithro sliding seats sedd lithro sliding tackle tacl lithriad sliding tackles tacl lithriad sliding top top llithr (table) sliding tops top llithr (table) sliding-door lock clo drws llithr sliding-door locks clo drws llithr slight dinistrio (a castle) slim main slim knife cyllell fain slim knifes cyllell fain slime llysnafedd slime fungi ffyngau llysnafedd slimes llysnafedd sling ffon dafl (for shooting) sling sling (for supporting arm etc) slings ffon dafl (for shooting) slings sling (for supporting arm etc) slip cryfhawr (in carpentry) slip llithriad (=mistake, slide) slip pais (=petticoat) slip slip (of cricket fielder) slip slip (of cricket position) slip slip (pottery) slip slipio (the ball) slip casting castin slip slip castings castin slip slip clay clai slip slip gauge medrydd slip slip gauges medrydd slip slip hemming hemio slip slip hemming stitch pwyth hemio slip slip hemming stitches pwyth hemio slip slip plane plân slip slip planes plân slip slip road slipffordd slip roads slipffordd slip stain staen slip slip stains staen slip slip tracer dargopïwr slip slip tracers dargopïwr slip slip tracing llwybro slip slip ware crochenwaith slip slip wares crochenwaith slip slip-off slope llethr slip slip-off slopes llethr slip slip-step cam llithro slip-step llithro slip-step in a circle cam llithro mewn cylch slip-stepping clockwise llithro gyda'r cloc slip-steps cam llithro slippery llithrig slips cryfhawr (in carpentry) slips llithriad (=mistake, slide) slips pais (=petticoat) slips slip (of cricket fielder) slips slip (of cricket position) slips slip (pottery) slipway llithrfa slit agen slits agen slitting agennu slitting saw llif agennu slitting saws llif agennu slocombe drill dril canoli slocombe drills dril canoli slogan slogan slogans slogan slope goledd (=inclined position or direction) slope goleddu slope graddiant (=measure of gradient) slope llethr (=piece of rising or falling ground) slope of line goledd llinell slopes goledd (=inclined position or direction) slopes graddiant (=measure of gradient) slopes llethr (=piece of rising or falling ground) sloping face wyneb goleddol sloping faces wyneb goleddol sloping haunch hansh ar oledd sloping haunches hansh ar oledd slot agen (=slit) slot rhych (of screwhead etc) slot slot (in general) slot screwing rhych sgriwio slots agen (=slit) slots rhych (of screwhead etc) slots slot (in general) slotted agennog slotted link dolen rych slotted links dolen rych slotted nut nyten rych slotted nuts nyten rych slotting drill dril rhychio slotting drills dril rhychio slotting milling cutter melinwr agennu slotting saw llif agennu slotting saws llif agennu slough cen sloughs cen slow araf slow ball pêl araf slow balls pêl araf slow bowler bowliwr araf slow bowlers bowliwr araf slow bowling bowlio araf slow casserole caserol araf slow casseroles caserol araf slow down arafu slow left arm bowler bowliwr araf braich chwith slow left arm bowlers bowliwr araf braich chwith slow motion arafu lluniau (in films) slow run rhedeg araf slub yarn edafedd slyb sludging priddlif (=solifluction) sludgings priddlif (=solifluction) slug gwlithen (of mollusc) slug slyg (in mathematics) slugs gwlithen (of mollusc) slugs slyg (in mathematics) sluice lle golchi sluices lle golchi slum slym slum clearance clirio slymiau slump cylchlithriad (land) slump dirwasgiad slumped cliff clogwyn cylchlithriad slumped cliffs clogwyn cylchlithriad slumping cylchlithro slumps cylchlithriad (land) slumps dirwasgiad slums slym slur llithriad slur llithro slurs llithriad slush enamel enamel llaid slush enamels enamel llaid slype tramwyfa slypes tramwyfa small circle cylch bychan small circles cylch bychan small claims court llys mân ddyledion small claims courts llys mân ddyledion small court cwrt bychan small courts cwrt bychan small holding mân ddaliad small holdings mân ddaliad small intestine coluddyn bach small intestines coluddyn bach small letter llythyren fach small letters llythyren fach small scale graddfa fach small scales graddfa fach small world play chwarae byd bach small-scale production cynhyrchu ar raddfa fach small-sided i ochrau bach small-sided game gêm timau bach small-sided games gêm timau bach smaller-scale map map graddfa lai smaller-scale maps map graddfa lai smallholding tyddyn smallholdings tyddyn smallpox y frech wen smallpoxes y frech wen smart smart smart materials defnyddiau clyfar smash ergyd galed smash shot pwyad smash shots pwyad smashs ergyd galed smear iriad smears iriad smell arogl smells arogl smelt mwyndoddi smelter ffwrnais fwyndoddi smelters ffwrnais fwyndoddi smock crychu smock smoc smocking smocwaith smocking transfer trosglwyddyn smocwaith smocking transfers trosglwyddyn smocwaith smockings smocwaith smocks smoc smog mwrllwch smogs mwrllwch smoke mwg smoke ysmygu smoke controlled area rhanbarth rheoli mwg smoke controlled areas rhanbarth rheoli mwg smoked bacon cig moch wedi'i gochi smoked bacons cig moch wedi'i gochi smokeless fuel tanwydd di-fwg smokeless fuels tanwydd di-fwg smokes mwg smoking yn mygu (of fire etc) smoking ysmygu (cigarettes, pipe) smooth llyfn smooth llyfnu smooth curve cromlin lefn smooth curves cromlin lefn smooth cut file ffeil lefn smooth cut files ffeil lefn smooth finish gorffeniad llyfn smooth finishs gorffeniad llyfn smooth muscle cyhyr anrhesog smooth muscles cyhyr anrhesog smooth surface arwyneb llyfn smooth surfaces arwyneb llyfn smooth texture gwead llyfn smooth textures gwead llyfn smoothing capacitor cynhwysydd llyfnhau smoothing capacitors cynhwysydd llyfnhau smoothing plane plaen llyfnhau smoothing planes plaen llyfnhau smother mygu smother tackle tacl goflaid smother tackles tacl goflaid smudge smwtsio smut penddu smuts penddu smutted wheat gwenith penddu smutted wheats gwenith penddu snack bar bar byrbryd snack bars bar byrbryd snail bit ebill gwrthsoddi malwen snail bits ebill gwrthsoddi malwen snail's trail pattern patrwm ôl y falwen snail's trail patterns patrwm ôl y falwen snake bite brathiad neidr snake bites brathiad neidr snap clecian (to grid) snap torri (string) snap fastener ffasnydd snap snap fasteners ffasnydd snap snap riveting rhybedu snap snap-head rivet rhybed pengrwn snap-head rivets rhybed pengrwn snaplink clesbyn (Karabiner) snaplinks clesbyn (Karabiner) snare drum drwm gwifrau snare drums drwm gwifrau snarling cafflo (=tangle) snarling iron haearn cafflo snarling irons haearn cafflo snatch cipio sneeze tisian sniff arogli (glue etc) snip snip snipping snipio snips snip snips snipiwr snow bridge pont eira snow bridges pont eira snow drift lluwch eira snow drifts lluwch eira snow fed river afon eira tawdd snow fed rivers afon eira tawdd snow glasses sbectol eira snow goose gŵydd yr eira snow gooses gŵydd yr eira snow line eirlin snow lines eirlin snowfield maes eira snowfields maes eira snowy owl tylluan yr eira snowy owls tylluan yr eira soak mwydo (dried food etc) soaked peas pys wedi'u mwydo soaker darn gwrthddwr soakers darn gwrthddwr soap sebon soap flakes fflochion sebon soap opera opera sebon soap operas opera sebon soap powder powdr golchi soap powders powdr golchi soaped pad pad sebon soaped pads pad sebon soapless disebon soapless detergent glanedydd disebon soapless detergents glanedydd disebon soaps sebon soapy sebonllyd soapy water dŵr sebon soapy waters dŵr sebon socage socaeth socages socaeth socalization cymdeithasoliad socalizations cymdeithasoliad soccer shirt crys pêl-droed soccer shirts crys pêl-droed social cymdeithasol social and economic factors affecting health ffactorau cymdeithasol ac economaidd sy'n effeithio ar iechyd social area analysis dadansoddiad ardaloedd cymdeithasol social assessment asesiad cymdeithasol social assessments asesiad cymdeithasol social benefit budd cymdeithasol social benefits budd cymdeithasol social care gofal cymdeithasol social cares gofal cymdeithasol social class dosbarth cymdeithasol social constructivist adeileddwr cymdeithasol social constructivists adeileddwr cymdeithasol social cost cost gymdeithasol social costs cost gymdeithasol social democrat democrat cymdeithasol social democrat democrataidd cymdeithasol social democrats democrat cymdeithasol social development datblygiad cymdeithasol social developments datblygiad cymdeithasol social economic group grŵp economaidd cymdeithasol social economic groups grŵp economaidd cymdeithasol social engineering teilwrio cymdeithasol social exclusion all-gau cymdeithasol social factor ffactor gymdeithasol social factors ffactor gymdeithasol social history hanes cymdeithasol social impact effaith gymdeithasol social impacts effaith gymdeithasol social implications arwyddocâd cymdeithasol social model model cymdeithasol social models model cymdeithasol social order trefn cymdeithas social orders trefn cymdeithas social organization cyfundrefn gymdeithasol social organizations cyfundrefn gymdeithasol social policy polisi cymdeithasol social policy development datblygiad polisi cymdeithasol social policy developments datblygiad polisi cymdeithasol social practice arfer cymdeithasol social practices arfer cymdeithasol social pressures pwysau cymdeithasol social referencing cyfeirio cymdeithasol social reform diwygio cymdeithasol social relationship perthynas gymdeithasol social relationships perthynas gymdeithasol social role valorization rhoi gwerth ar swyddogaeth gymdeithasol social security nawdd cymdeithasol social services gwasanaethau cymdeithasol social services department adran gwasanaethau cymdeithasol social services departments adran gwasanaethau cymdeithasol social skill sgil cymdeithasol social skills sgil cymdeithasol social skills sgiliau cymdeithasol social skills training hyfforddi sgiliau cymdeithasol social space gofod cymdeithasol social spaces gofod cymdeithasol social status statws cymdeithasol social structure strwythur cymdeithasol social structures strwythur cymdeithasol social studies astudiaethau cymdeithasol social trend tuedd gymdeithasol social trends tuedd gymdeithasol social unrest aflonyddwch cymdeithasol social unrests aflonyddwch cymdeithasol social welfare lles cymdeithasol social welfares lles cymdeithasol social work gwaith cymdeithasol social worker gweithiwr cymdeithasol social workers gweithiwr cymdeithasol social works gwaith cymdeithasol socialism sosialaeth socialisms sosialaeth socialist sosialaidd socialist sosialydd socialists sosialydd socialization cymdeithasoli socially clean cymdeithasol lân society cymdeithas socio-cultural impact effaith ddiwylliannol gymdeithasol socio-cultural impacts effaith ddiwylliannol gymdeithasol socio-dramatic play chwarae dramatig-gymdeithasol socio-economic economaidd gymdeithasol socio-economic status statws cymdeithasol-economaidd sociology cymdeithaseg sociology of childhood cymdeithaseg plentyndod sociology of education cymdeithaseg addysg sock hosan fer socket crau (of joint) socket soced (electrical etc) socket twll (of eye) socket screw sgriw soced socket screws sgriw soced socket spanner sbaner soced socket spanners sbaner soced socketed axe bwyell greuog socketed axes bwyell greuog socketed sickle cryman creuog socketed sickles cryman creuog sockets crau (of joint) sockets soced (electrical etc) sockets twll (of eye) socks hosan fer soda soda soda soda golchi (washing soda) sodas soda sodas soda golchi (washing soda) sodium sodiwm (Na) sodium azide sodiwm asid sodium azides sodiwm asid sodium bicarbonate sodiwm deucarbonad sodium bicarbonates sodiwm deucarbonad sodium carbonate sodiwm carbonad sodium carbonates sodiwm carbonad sodium chloride sodiwm clorid sodium chlorides sodiwm clorid sodium ethoxide sodiwm ethocsid sodium ethoxides sodiwm ethocsid sodium hydroxide sodiwm hydrocsid sodium hydroxide solution hydoddiant sodiwm hydrocsid sodium hydroxide solutions hydoddiant sodiwm hydrocsid sodium hydroxides sodiwm hydrocsid sodium lauryl sulphonate sodiwm lawryl sylffonad sodium lauryl sulphonates sodiwm lawryl sylffonad sodium thiosulphate solution hydoddiant sodiwm thiosylffad sodium thiosulphate solutions hydoddiant sodiwm thiosylffad sodiums sodiwm (Na) soffit bondo soffit bearer cynheiliad bondo soffit bearers cynheiliad bondo soffit board astell fondo soffit boards astell fondo soffits bondo soft meddal soft board plane plaen meddalfwrdd soft board planes plaen meddalfwrdd soft cloth cadach meddal soft cloths cadach meddal soft consistency ansawdd meddal soft copy copi meddal soft drug cyffur ysgafn soft drugs cyffur ysgafn soft flour blawd meddal soft flours blawd meddal soft furnishings dodrefn meddal soft ground etching ysgythru ar rwnd meddal soft hair brush brwsh blew meddal soft hair brushs brwsh blew meddal soft hammer morthwyl meddal soft hammers morthwyl meddal soft head pen meddal soft heads pen meddal soft iron core craidd haearn meddal soft iron cores craidd haearn meddal soft iron keeper cadwrydd haearn meddal soft iron keepers cadwrydd haearn meddal soft landscaping tirlunio meddal soft option dewis hawdd soft options dewis hawdd soft pedal pedal chwith soft pedals pedal chwith soft pleating pletio ysgafn soft sectored sectoriad meddal soft sectoreds sectoriad meddal soft soap sebon meddal soft soaps sebon meddal soft solder sodr meddal soft soldering sodro meddal soft solders sodr meddal soft table bwrdd meddal soft tables bwrdd meddal soft texture gwead meddal soft textures gwead meddal soft tissue meinwe feddal soft tissues meinwe feddal soft touch cyffyrddiad ysgafn soft touches cyffyrddiad ysgafn soft toy tegan meddal soften meddalu softener meddalydd softeners meddalydd softness meddalwch software engineer peiriannydd meddalwedd software engineers peiriannydd meddalwedd software house tŷ meddalwedd software houses tŷ meddalwedd software protection diogelwch meddalwedd software protections diogelwch meddalwedd softwood pren meddal softwood cell cell pren meddal softwood cells cell pren meddal softwood wedging lletemu pren meddal softwoods pren meddal soil baw (=dirt) soil pridd (=earth) soil creep ymgripiad pridd soil creeps ymgripiad pridd soil erosion erydiad pridd soil erosions erydiad pridd soil fertility ffrwythlondeb pridd soil horizon haenlin pridd soil horizons haenlin pridd soil micro-organisms micro-organebau'r pridd soil profile proffil pridd soil profiles proffil pridd soil structure adeiledd pridd soil structures adeiledd pridd soil suspending agent cyfrwng dal baw soil suspending agents cyfrwng dal baw soil texture gwead pridd soil textures gwead pridd soil type math o bridd soil types math o bridd soiled wedi baeddu soils baw (=dirt) soils pridd (=earth) sol-fa solffeuo sol-fa hand sign arwydd llaw sol-ffa sol-fa hand signs arwydd llaw sol-ffa sol-faist solffeuwr (male and general) sol-faist solffeuwraig (female) sol-faists solffeuwr (male and general) sol-faists solffeuwraig (female) solar solar (central heating system) solar activity gweithgaredd yr haul solar day diwrnod haul solar eclipse diffyg ar yr haul solar eclipses diffyg ar yr haul solar energy egni solar solar eruption echdoriad yr haul solar eruptions echdoriad yr haul solar heating gwres solar solar heatings gwres solar solar radiation pelydriad heulog solar radiations pelydriad heulog solar system cysawd yr haul solar systems cysawd yr haul solar time amser yr haul solar times amser yr haul solar year blwyddyn haul solar years blwyddyn haul solder sodr solder sodro solder and braze sodro a phresyddu solder panel panel sodr solder panels panel sodr soldered sodrog soldering bench mainc sodro soldering benches mainc sodro soldering bit haearn sodro soldering bits haearn sodro soldering iron haearn sodro soldering irons haearn sodro soldering process proses sodro solders sodr sole gwadn sole of the foot gwadn troed sole trader unig fasnachwr sole traders unig fasnachwr solenoid solenoid solenoids solenoid soleplate platwadn (of iron) soleplates platwadn (of iron) soles gwadn solfatara solffatara solfataras solffatara solicitor cyfreithiwr solicitors cyfreithiwr solid solet solid solid solid auger bit ebill taradr solet solid auger bits ebill taradr solet solid cleated door drws cleddog solet solid cleated doors drws cleddog solet solid drawn hinge colfach solet solid drawn hinges colfach solet solid figure ffigur solet solid figures ffigur solet solid floor llawr solet solid floors llawr solet solid fuel tanwydd solet solid fuels tanwydd solet solid moulding mowldin solet solid mouldings mowldin solet solid of revolution solid cylchdro solid panel panel solet solid panels panel solet solid state cyflwr solet solid states cyflwr solet solid strut cynheiliad solet solid struts cynheiliad solet solid strutting cynheilio solet solid timber pren solet solid timbers pren solet solid wall wal solet solid walls wal solet solid wood pren solet solid wood door drws pren solet solid wood doors drws pren solet solid woods pren solet solidarity cydlyniad solidification solidiad solidifications solidiad solidify caledu (non-technical usage) solidify ymsolido (in physics etc) solidity cadernid (of argument etc) solidity solidedd (in chemistry etc) solids solid solifluction priddlif solifluctions priddlif solitary play chwarae unigol solo unawd solo instrument offeryn unawd solo instruments offeryn unawd solo organ organ solo solo organs organ solo solo stop stop solo solo stops stop solo soloist unawdydd soloists unawdydd solonchak solontshac solonchaks solontshac solonetz solonets solonetzes solonets solstice heuldro solstices heuldro solubility hydoddedd solubility product constant cysonyn lluoswm hydoddedd solubility product constants cysonyn lluoswm hydoddedd soluble hydawdd soluble in water hydawdd mewn dŵr soluble oil olew hydawdd soluble oils olew hydawdd soluble varnish farnais hydawdd soluble varnishs farnais hydawdd solute hydoddyn solutes hydoddyn solution ateb (=answer) solution datrysiad (=solving) solution hydoddiant (of dissolved state) solution of salts hydoddiant halwynau solution set set ddatrysiad solution sets set ddatrysiad solutions ateb (=answer) solutions datrysiad (=solving) solutions hydoddiant (of dissolved state) solvated hydoddedig solvation hydoddiant solvations hydoddiant solve datrys solve a problem datrys problem solve the equation datrys yr hafaliad solvency hyfywedd solvent hydoddydd solvent abuse camddefnyddio hydoddyddion solvent abuses camddefnyddio hydoddyddion solvent extraction echdyniad â hydoddydd solvent extractions echdyniad â hydoddydd solvent front ffin hydoddydd solvent fronts ffin hydoddydd solvent sniffing arogli hydoddyddion solvents hydoddydd somatic somatig somatic mutation mwtaniad somatig somatic mutations mwtaniad somatig somatotype somatoteip somatotypes somatoteip sombre tywyll sombre atmosphere awyrgylch prudd sombre atmospheres awyrgylch prudd somersault trosben somersault trosbennu somersault dive deif drosben somersault dives deif drosben somersaults trosben son tape merch-dâp son tapes merch-dâp sonarized sonaredig sonata sonata sonata form ffurf sonata sonata forms ffurf sonata sonata rondo rondo sonata sonatas sonata sonatina sonatina sonatinas sonatina song cân songs cân sonnenseite llygad haul (=adret) sonnenseites llygad haul (=adret) sonometer sainfesurydd sonometers sainfesurydd sonority seinlawnder sonorous soniarus soothe lleddfu sophistication soffistigeiddrwydd sophistications soffistigeiddrwydd soprano soprano sorbite sorbit sorbites sorbit sore briw sore throat dolur gwddf sore throats dolur gwddf sores briw soroche salwch mynydd soroches salwch mynydd sort trefniad sort trefnu (=arrange) sort ascending trefniad esgynnol sort ascendings trefniad esgynnol sort descending trefniad disgynnol sort descendings trefniad disgynnol sort in alphabetical order gosod yn nhrefn y wyddor sorted trefnedig sorts trefniad sough lefel soughs lefel sound plymio (=dive) sound sain (musical) sound swnt (=passage of water) sound sŵn (=noise) sound board seinfwrdd sound boards seinfwrdd sound box seinflwch sound boxes seinflwch sound card cerdyn sain sound cards cerdyn sain sound collage collage o seiniau sound collages collage o seiniau sound effects effeithiau sain sound generator generadur sain sound generators generadur sain sound hole seindwll sound holes seindwll sound insulation ynysu rhag sŵn sound judgment barn gadarn sound judgments barn gadarn sound level meter mesurydd lefelau sain sound level meters mesurydd lefelau sain sound path llwybr sain sound paths llwybr sain sound picture seinlun sound pictures seinlun sound processing prosesu sain sound source ffynhonnell sain sound sources ffynhonnell sain sound table bwrdd sain sound tables bwrdd sain sound wave seindon sound waves seindon soundbite sylw bachog soundbites sylw bachog soundproof gwrthsain sounds sain (musical) sounds swnt (=passage of water) sounds sŵn (=noise) soundtrack trac sain soundtracks trac sain source ffynhonnell (in general) source tarddiad (of stream etc) source tarddle (of specific point) source disk disg ffynhonnell source disks disg ffynhonnell source drive gyrriant ffynhonnell source drives gyrriant ffynhonnell source language iaith ffynhonnell source languages iaith ffynhonnell source of authority ffynhonnell awdurdod source of light tarddiad goleuni source of variation tarddle amrywiant source program rhaglen ffynhonnell source programs rhaglen ffynhonnell sources ffynhonnell (in general) sources tarddiad (of stream etc) sources tarddle (of specific point) sources of finance ffynonellau cyllid south de south celestial pole pegwn wybrennol y de south celestial poles pegwn wybrennol y de south magnetic pole pôl magnetig y de south magnetic poles pôl magnetig y de south pole pôl de (of a magnet) south poles pôl de (of a magnet) south seeking pole pôl sy'n cyrchu tua'r de (of a magnet) south seeking poles pôl sy'n cyrchu tua'r de (of a magnet) southing deheuad southings deheuad souths de sovereign sofran (=supreme ruler) sovereign sofren (=gold coin) sovereign state gwladwriaeth sofran sovereign states gwladwriaeth sofran sovereigns sofran (=supreme ruler) sovereigns sofren (=gold coin) sovereignty sofraniaeth sovereignty homage gwrogaeth sofraniaeth sovereignty homages gwrogaeth sofraniaeth sovereignty of the people sofraniaeth y bobl soviet sofiet soviet montage montage sofiet soviet montages montage sofiet soviets sofiet soya beans ffa soia spa sba space bwlch (=gap) space gofod (around a person, beyond Earth's atmosphere) space gwaglyn (between cells etc) space lle gwag (=empty place) space awareness ymwybyddiaeth ofodol space bar bylchwr space bars bylchwr space domain parth gofod space domains parth gofod space shuttle gwennol ofod space shuttles gwennol ofod space-filling model model llenwi-gofod space-filling models model llenwi-gofod space-saving table bwrdd arbed lle space-saving tables bwrdd arbed lle space-time gofod-amser space-times gofod-amser spaced warp ystof wahanedig spaced warps ystof wahanedig spaceman gofodwr spacemans gofodwr spacer gwahanydd spacers gwahanydd spaces bwlch (=gap) spaces gofod (around a person, beyond Earth's atmosphere) spaces gwaglyn (between cells etc) spaces lle gwag (=empty place) spacing bylchiad spacings bylchiad spadix sbadics spadixes sbadics spalt rhigol spalts rhigol span rhychwant span rhychwantu span of control rhychwant rheoli spanner sbaner spanners sbaner spanning pontio spans rhychwant spare blade llafn sbâr spare blades llafn sbâr spark gwreichionen spark gwreichioni spark test prawf gwreichionen spark tests prawf gwreichionen sparking plug plwg tanio sparking plugs plwg tanio sparkling pefriol sparks gwreichionen sparring sbarian sparring partner partner sbarian sparring partners partner sbarian sparrowhawk gwalch glas sparrowhawks gwalch glas spars ceibrennau cyffredin (common rafters) sparse gwasgarog spastic child plentyn sbastig spastic childs plentyn sbastig spate llifeiriant spates llifeiriant spathe fflurwain spathes fflurwain spatial gofodol spatial ability gallu gofodol spatial configuration ffurfwedd ofodol spatial configurations ffurfwedd ofodol spatial context cyd-destun gofodol spatial contexts cyd-destun gofodol spatial data data gofodol spatial distribution dosbarthiad gofodol spatial distributions dosbarthiad gofodol spatial feature nodwedd ofodol spatial features nodwedd ofodol spatial margins ymylon gofodol spatial organisation trefnu gofod spatial orientation cyfeiriadaeth ofodol spatial orientations cyfeiriadaeth ofodol spatial puzzle pos gofodol spatial puzzles pos gofodol spatial reasoning rhesymu gofodol spatial relationship cydberthynas ofodol spatial relationships cydberthynas ofodol spatula sbatwla spatulas sbatwla spawn grifft (of frogs) spawn sil (of fish etc) spawn silio spawning area silfa spawning areas silfa spawns grifft (of frogs) spawns sil (of fish etc) speaker llefarydd (of House of Commons) speaker seinydd (=sound unit) speaker siaradwr (at a conference etc) speaker key cwgn sain speakers llefarydd (of House of Commons) speakers seinydd (=sound unit) speakers siaradwr (at a conference etc) spear gwaywffon spear trywanu spears gwaywffon special care baby unit uned gofal arbennig i fabanod special care baby units uned gofal arbennig i fabanod special care unit uned gofal arbennig special care units uned gofal arbennig special development area ardal ddatblygu arbennig special development areas ardal ddatblygu arbennig special diet deiet arbennig special diets deiet arbennig special education addysg arbennig special educational needs anghenion addysgol arbennig special educations addysg arbennig special effect effaith arbennig special effects effaith arbennig special grant grant arbennig special grants grant arbennig special juror rheithiwr arbennig special jurors rheithiwr arbennig special needs anghenion arbennig special needs support service gwasanaeth cefnogi anghenion arbennig special needs support services gwasanaeth cefnogi anghenion arbennig special school ysgol arbennig special schools ysgol arbennig special support assistant cynorthwyydd cefnogaeth arbennig special support assistants cynorthwyydd cefnogaeth arbennig special unit uned arbennig special units uned arbennig specialised equipment offer arbenigol specialism arbenigedd specialisms arbenigedd specialist arbenigwr specialist care worker gweithiwr gofal arbenigol specialist care workers gweithiwr gofal arbenigol specialist magazine cylchgrawn arbenigol specialist magazines cylchgrawn arbenigol specialist shop siop arbenigol specialist shops siop arbenigol specialists arbenigwr speciality arbenigedd specialization arbenigaeth specializations arbenigaeth specialize arbenigo specialized arbenigol speciation ffurfiant rhywogaethau speciations ffurfiant rhywogaethau specie arian bath species arian bath species rhywogaeth species of bacteria rhywogaeth o facteria specific penodol (=definite, particular etc) specific sbesiffig (=per unit mass) specific dynamic action gweithred ddynamig benodol specific dynamic actions gweithred ddynamig benodol specific factor ffactor benodol specific factors ffactor benodol specific heat capacity cynhwysedd gwres sbesiffig specific learning difficulty anhawster dysgu penodol specific material defnydd penodol specific materials defnydd penodol specific performance cyflwyniad penodol specific performances cyflwyniad penodol specification manyleb specification grid grid manyleb specification grids grid manyleb specification language iaith manyleb specification languages iaith manyleb specifications manyleb specificity penodolrwydd (enzyme) specify enwi specify location pennu lleoliad specimen sbesimen specimens sbesimen speckle brychni speckle brychu speckles brychni spectator gwyliwr spectator ion ïon segur spectator ions ïon segur spectators gwyliwr spectral sbectrol spectrometer sbectromedr spectrometers sbectromedr spectrometry sbectromedreg spectrophotometer sbectroffotomedr spectrophotometers sbectroffotomedr spectroscope sbectrosgop spectroscopes sbectrosgop spectroscopic sbectrosgopig spectroscopic technique techneg sbectrosgopig spectroscopic techniques techneg sbectrosgopig spectroscopy sbectrosgopeg spectrum sbectrwm spectrum palette palet sbectrwm spectrum palettes palet sbectrwm spectrums sbectrwm speculate hapfasnachu (in finance) speculation hapfasnach (in finance) speculations hapfasnach (in finance) speculative hapfasnachol (in finance) speculator hapfasnachwr (in finance) speculators hapfasnachwr (in finance) speech araith (=oration) speech lleferydd (=faculty of speaking) speech and language therapy therapi lleferydd ac iaith speech development datblygu'r gallu i siarad speech difficulty anhawster llefaru speech impediment nam ar y lleferydd speech impediments nam ar y lleferydd speech recognition adnabod lleferydd speech synthesis synthesis lleferydd speech therapist therapydd lleferydd speech therapists therapydd lleferydd speech therapy therapi lleferydd speeches araith (=oration) speeches lleferydd (=faculty of speaking) speed buanedd (scalar quantity) speed cyflymder (in general) speed / time diagram diagram buanedd / amser speed / time diagrams diagram buanedd / amser speed of light cyflymder goleuni speed of the ball cyflymder y bêl speed ratio cymhareb buanedd speed regulator rheolydd cyflymder (of machine part) speed regulators rheolydd cyflymder (of machine part) speed up cyflymu speedometer sbidomedr speedometers sbidomedr speeds buanedd (scalar quantity) speeds cyflymder (in general) speleologist ogofwr speleologists ogofwr speleology ogofeg spell sillafu spell checker gwirydd sillafu spell checkers gwirydd sillafu spelling option dewisiad sillafu spelling options dewisiad sillafu spelling test prawf sillafu spelling tests prawf sillafu spelter sbelter spelters sbelter spend gwario (money) spend treulio (time) spending gwariant spendings gwariant sperm sberm spermatogenesis sbermatogenesis spermatozoon sbermatosoon spermatozoons sbermatosoon spermicidal sbermleiddiol spermicide sbermleiddiad spermicides sbermleiddiad spermocyte sbermocyt spermocytes sbermocyt sperms sberm sphagnum migwyn (moss) sphagnums migwyn (moss) sphalerite sffalerit sphalerites sffalerit sphere sffêr sphere of influence cylch dylanwad spheres sffêr spherical sfferig spherical triangle triongl sfferig spherical triangles triongl sfferig spherical vacuum cleaner sugnwr llwch crwn spherical vacuum cleaners sugnwr llwch crwn spheroid sfferoid spheroidal sfferoidol spheroids sfferoid spherometer sfferomedr spherometers sfferomedr sphincter sffincter sphincters sffincter sphygmomanometer teclyn mesur pwysau gwaed sphygmomanometers teclyn mesur pwysau gwaed spice sbeis spices sbeis spider corryn spiders corryn spigot sbigot spigots sbigot spike sbigyn spiked shoe esgid sbeic spiked shoes esgid sbeic spikelet sbigolyn spikelets sbigolyn spikes sbigyn spillway gorlifan spin nyddu (wool) spin sbin (of elementary particles) spin sbinio (of elementary particles) spin troelli (in general) spin troelliad (in general) spin drier sychwr dillad spin driers sychwr dillad spin of racket troelliad raced spin of the Earth troelliad y Ddaear spin resonance cyseiniant sbin spin resonances cyseiniant sbin spin the ball troelli'r bêl spin-off deilliedig spin-off industries diwydiannau deilliedig spina bifida spina bifida spina bifidas spina bifida spinal sbinol spinal cord madruddyn y cefn spinal cords madruddyn y cefn spinal nerve nerf yr asgwrn cefn spinal nerves nerf yr asgwrn cefn spinal reflex atgyrch sbinol spinal reflexes atgyrch sbinol spindle gwerthyd spindle attachment atodyn gwerthyd spindle attachments atodyn gwerthyd spindle back chair cadair gefn gwerthyd spindle back chairs cadair gefn gwerthyd spindle moulder mowldiwr gwerthyd spindle moulders mowldiwr gwerthyd spindle nut nyten werthyd spindle nuts nyten werthyd spindles gwerthyd spine asgwrn cefn (spinal column) spine draenen (of plants, fish, hedgehogs etc) spine meingefn (of book) spines asgwrn cefn (spinal column) spines draenen (of plants, fish, hedgehogs etc) spines meingefn (of book) spinet spined spinets spined spinneret nyddolyn spinnerets nyddolyn spinning jenny siani nyddu spinning top top troi spinning tops top troi spinning wheel troell nyddu spinning wheels troell nyddu spinous processes cnapiau asgwrn cefn spins sbin (of elementary particles) spins troelliad (in general) spiracle sbiragl spiracles sbiragl spiral sbiral spiral troellog spiral cleavage ymraniad troellog spiral cleavages ymraniad troellog spiral curriculum cwricwlwm sbiral spiral curriculums cwricwlwm sbiral spiral flute ffliwt sbiral spiral flutes ffliwt sbiral spiral milling cutter melinwr sbiral spiral milling cutters melinwr sbiral spiral screwdriver tyrnsgriw sbiral spiral screwdrivers tyrnsgriw sbiral spiral spring sbring sbiral spiral springs sbring sbiral spiral staircase grisiau tro spiral thickening tewychiad troellog spiral thickenings tewychiad troellog spiral valve falf droellog spiral valves falf droellog spirals sbiral spire meindwr spires meindwr spirit gwirod (of alcohol) spirit ysbryd (of person, ghost) spirit level lefel wirod spirit levels lefel wirod spirit marker marciwr gwirod spirit markers marciwr gwirod spirit stain staen gwirod spirit stains staen gwirod spirit varnish farnais gwirod spirit varnishs farnais gwirod spirits gwirod (of alcohol) spirits ysbryd (of person, ghost) spirits of turpentine gwirod tyrpant spiritual cân ysbrydol spiritual ysbrydol spiritual and moral education addysg ysbrydol a moesol spiritual and moral educations addysg ysbrydol a moesol spiritual aspect agwedd ysbrydol spiritual aspects agwedd ysbrydol spiritual development datblygiad ysbrydol spiritual developments datblygiad ysbrydol spiritual man dyn ysbrydol spiritual mans dyn ysbrydol spiritual power awdurdod ysbrydol spiritual powers awdurdod ysbrydol spiritual values gwerthoedd ysbrydol spiritualities eiddo ysbrydol spirituals cân ysbrydol spirochaete sbirochaet spirochaetes sbirochaet spirometer traces trywydd sbiromedr spit bêr (for roasting) spit tafod (of sand etc) spits bêr (for roasting) spits tafod (of sand etc) splanchnic perfeddol splash tasgu splashback cefnfwrdd splashbacks cefnfwrdd splay goledd splay legs coesau sblae splayed sblae splayed joint uniad sblae splayed joints uniad sblae spleen dueg spleens dueg splendid isolation arwahanrwydd gogoneddus splendid isolations arwahanrwydd gogoneddus splenic duegol splenic nerve nerf duegol splenic nerves nerf duegol splice sbleis splice sbleisio splices sbleis spline sblein splines sblein splint sblint splinter fflewyn splinters fflewyn splints sblint split hollt split hollti split bearing beryn hollt split bearings beryn hollt split brain ymennydd hollt split brains ymennydd hollt split die dei hollt split dies dei hollt split pattern patrwm hollt split patterns patrwm hollt split pin pìn hollt split pins pìn hollt split ring commutator cymudadur modrwy hollt split ring commutators cymudadur modrwy hollt split style of drawing arddull arlunio rhanedig split washer wasier hollt split washers wasier hollt split-level cooker stof ddeuddarn split-level cookers stof ddeuddarn split-level house tŷ amryw lefel split-level houses tŷ amryw lefel splits hollt splitting hollti splitting ymraniadau spoil difetha spoil heap tomen sbwriel spoil heaps tomen sbwriel spoiling of food difetha bwyd spoiling tactic tacteg sbwylio spoiling tactics tacteg sbwylio spoke adain olwyn spoken word gair llafar spoken words gair llafar spokes adain olwyn spokeshave rhasgl spokeshaves rhasgl spokesman llefarydd spokesmans llefarydd spondee corfan cytbwys spondees corfan cytbwys sponge sbwng sponge sbwngio sponge ball pêl sbwng sponge balls pêl sbwng sponge rubber rwber sbwng sponge rubbers rwber sbwng spongeable wallpaper papur sychadwy spongeable wallpapers papur sychadwy sponges sbwng spongophyll sbwngoffyl spongophylls sbwngoffyl spongy layer haen sbwngaidd spongy layers haen sbwngaidd sponsor noddwr sponsored spell sillafu noddedig sponsors noddwr spontaneous digymell spontaneous generation ymdarddiad digymell spontaneous generations ymdarddiad digymell spontaneous play chwarae digymell spontaneous response ymateb digymell spontaneous responses ymateb digymell spool sbŵl spool pin pìn sbŵl spool pins pìn sbŵl spool rack rac sbwliau spool racks rac sbwliau spooled printer argraffydd sbŵl spooled printers argraffydd sbŵl spooler sbwliwr spoolers sbwliwr spooling sbwlio spools sbŵl spoon llwy spoon bit ebill llwy spoon bits ebill llwy spoon tool erfyn llwy spoon tools erfyn llwy spoons llwy sporadic attendance presenoldeb ysbeidiol sporadic attendances presenoldeb ysbeidiol sporangium sborangiwm sporangiums sborangiwm spore sbôr spores sbôr sporogonium sborogoniwm sporogoniums sborogoniwm sporophore sboroffor sporophores sboroffor sporophyte sboroffyt sporophytes sboroffyt sport camp (of individual sports) sport chwaraeon (in general) sport scientist gwyddonydd chwaraeon sport scientists gwyddonydd chwaraeon sporting culture diwylliant chwaraeon sporting cultures diwylliant chwaraeon sporting example enghraifft o fyd chwaraeon sporting examples enghraifft o fyd chwaraeon sporting industry diwydiant chwaraeon sports camp (of individual sports) sports chwaraeon (in general) sports day mabolgampau sports hall neuadd chwaraeon sports halls neuadd chwaraeon sports therapist therapydd chwaraeon sports therapists therapydd chwaraeon sportsman mabolgampwr sportsmans mabolgampwr sportswoman mabolgampwraig sportswomans mabolgampwraig spot smotio spot smotyn spot unfan (on the) spot drop glass diferwydr spot facing sbotwynebu spot galvanometer galfanomedr smotyn spot galvanometers galfanomedr smotyn spot height pwynt uchder spot heights pwynt uchder spot lamp lamp oleugylch spot lamps lamp oleugylch spot welding sbotweldio spotlight golau cylch spotlights golau cylch spots smotyn spots unfan (on the) spotted smotiog spotting sbotio (in finishing metal) spout pig spouts pig sprain ysigiad sprains ysigiad spraint baw dyfrgi spraints baw dyfrgi sprawl blerdwf sprawls blerdwf spray chwistrell (of object) spray chwistrelliad (of act) spray chwistrellu spray booth bwth chwistrellu spray booths bwth chwistrellu spray bottle potel chwistrellu spray bottles potel chwistrellu spray cover gorchudd trochion spray covers gorchudd trochion spray diffuser tryledwr chwistrell spray diffusers tryledwr chwistrell spray gun gwn chwistrellu spray guns gwn chwistrellu spray iron haearn chwistrellu spray irons haearn chwistrellu spray nozzle twll chwistrellu (of iron) spray nozzles twll chwistrellu (of iron) spray painting paentiad chwistrell (of painted picture) spray painting peintio chwistrell (of process or art) spray paintings paentiad chwistrell (of painted picture) spray polish llathr chwistrell spray polishs llathr chwistrell spray starch startsh chwistrell spray starches startsh chwistrell sprayer chwistrellwr sprayers chwistrellwr spread lledaenu spreader lledaenydd spreaders lledaenydd spreadsheet taenlen spreadsheet taenlennu spreadsheet package pecyn taenlen spreadsheet packages pecyn taenlen spreadsheet software meddalwedd taenlen spreadsheet softwares meddalwedd taenlen spreadsheets taenlen sprig sbrig sprightly yn sionc sprigs sbrig spring gwanwyn (=season of year) spring sbring spring tarddell (of water) spring balance clorian sbring spring balances clorian sbring spring constant cysonyn sbring spring constants cysonyn sbring spring dividers cwmpas sbring spring green gwyrdd y gwanwyn (enamelling colour) spring greens gwyrdd y gwanwyn (enamelling colour) spring line tarddlin spring line settlement anheddiad tarddlin spring line settlements anheddiad tarddlin spring lines tarddlin spring punch pwnsh sbring spring punches pwnsh sbring spring squill serennyn y gwanwyn spring squills serennyn y gwanwyn spring term tymor y gwanwyn spring terms tymor y gwanwyn spring tide llanw mawr spring tides llanw mawr spring toggle togl sbring spring toggles togl sbring spring washer wasier sbring spring washers wasier sbring spring wood pren y gwanwyn spring woods pren y gwanwyn spring-cleaning glanhau blynyddol spring-loaded sbring-lwythog spring-loaded catch clicied sbring-lwythog spring-loaded catches clicied sbring-lwythog spring-sapping tarddell-danseilio springboard astell ddeifio springboard diving deifio o'r astell springboards astell ddeifio springs gwanwyn (=season of year) springs sbring springs tarddell (of water) springy sbringar springy turfs tywyrch sbringar sprinkle ysgeintio sprinkler ysgeintell sprinklers ysgeintell sprint gwibiad sprint gwibio sprint nofio cyflym (in swimming) sprint start cychwyn cyflym sprint starts cychwyn cyflym sprinter gwibiwr sprinters gwibiwr sprints gwibiad sprocket sbroced sprocket and chain sbroced a chadwyn sprocket hole twll cocos sprocket holes twll cocos sprocket wheel olwyn ddannedd sprocket wheels olwyn ddannedd sprockets sbroced spruce pyrwydden spruces pyrwydden sprue hole twll sbriw sprue holes twll sbriw sprue pin pìn sbriw sprue pins pìn sbriw spun metal metel trowasg spun metals metel trowasg spun rayon reion cyfrodedd spun rayons reion cyfrodedd spun wool edafedd gwlân spur cainc (of wiring) spur sbardun (in general) spur trywydd (=trace) spur gear gêr sbardun spur gears gêr sbardun spur wheel olwyn sbardun spur wheels olwyn sbardun spurious modes moddau ffug spurs cainc (of wiring) spurs sbardun (in general) spurs trywydd (=trace) spurt hyrddiad spurt hyrddio spurts hyrddiad sputum crachboer sputums crachboer spy hole twll sbïo spy holes twll sbïo squadron sgwadron squadrons sgwadron squall sgol squalls sgol squalor aflendid squalors aflendid square sgwario square sgwâr square angle ongl sgwâr square angles ongl sgwâr square bar bar sgwâr square bars bar sgwâr square brackets bachau petryal square centimetre centimetr sgwâr square centimetres centimetr sgwâr square cut trawsergyd sgwâr square cuts trawsergyd sgwâr square deal policy polisi chwarae teg square drift drifft sgwâr square drifts drifft sgwâr square edged ymyl sgwâr square edgeds ymyl sgwâr square file ffeil sgwâr square files ffeil sgwâr square haunch hansh sgwâr square haunched hansiedig sgwâr square haunched mortise and tenon joint uniad mortais a thyno hansiedig sgwâr square haunched mortise and tenon joints uniad mortais a thyno hansiedig sgwâr square haunched tenon tyno hansiedig sgwâr square haunched tenons tyno hansiedig sgwâr square haunches hansh sgwâr square head pensgwar (machine screws) square head bolt bollt bensgwar square head bolts bollt bensgwar square head screw sgriw bensgwar square head screws sgriw bensgwar square head stake bonyn pensgwar square head stakes bonyn pensgwar square integrable integradwy sgwâr square leg coes sgwâr (of table etc) square leg coeswr sgwâr (of person) square legs coes sgwâr (of table etc) square legs coeswr sgwâr (of person) square matrix matrics sgwâr square matrixes matrics sgwâr square mouth plane plaen ceg sgwâr square mouth planes plaen ceg sgwâr square mouth tongs gefel ceg sgwâr square neck gwddf sgwâr square necks gwddf sgwâr square nose pliers gefelen trwyn sgwâr square nosed tool erfyn trwyn sgwâr square nosed tools erfyn trwyn sgwâr square number rhif sgwâr square numbers rhif sgwâr square nut nyten sgwâr square nuts nyten sgwâr square pass pàs sgwâr square prism prism sgwâr square prisms prism sgwâr square pyramid pyramid sgwâr square pyramids pyramid sgwâr square root ail isradd square roots ail isradd square section bar bar toriad sgwâr square section bars bar toriad sgwâr square section material defnydd trychiad sgwâr square section materials defnydd trychiad sgwâr square set set sgwâr square sets set sgwâr square stance safiad sgwâr square stances safiad sgwâr square thread edau sgwâr square threads edau sgwâr square trowel trywel sgwâr square trowels trywel sgwâr square up sgwario square-box tongs gefel flwch sgwâr squared paper papur sgwariau squared papers papur sgwariau squares sgwâr squaretail carrier cariwr cynffon sgwâr squaretail carriers cariwr cynffon sgwâr squaring up sgwario squash gwasgu squash sboncen squashs sboncen squat cyrcydu squat flask fflasg fyrdew squat flasks fflasg fyrdew squatter sgwatiwr squatter settlement anheddiad sgwatwyr squatter settlements anheddiad sgwatwyr squatters sgwatiwr squeegee gwesgi squeegees gwesgi squeeze gwasgu squiggle sgwigl squiggles sgwigl squill serennyn squills serennyn squint llygad croes squints llygad croes squire yswain squirearchical ysweiniol squirearchy ysweiniaeth squires yswain squirrel hair brush brwsh blew gwiwer squirrel hair brushs brwsh blew gwiwer squirt chwistrelliad squirt chwistrellu squirts chwistrelliad stab stitch pwyth taro stab stitches pwyth taro stability sadrwydd (of object) stability sefydlogrwydd (of economy, society etc) stabilization technique techneg sefydlogi stabilization techniques techneg sefydlogi stabilize sefydlogi stabilizer sefydlogydd stabilizers sefydlogydd stable sefydlog stable equilibrium cydbwysedd sefydlog stable equilibriums cydbwysedd sefydlog staccato stacato stack pentwr (=pile) stack pentyrru (=pile up) stack stac (=coastal islet) stack tas (of hay, wood) stack base sail stac stack bases sail stac stack overflow gorlif stac stack overflows gorlif stac stack top pen stac stack tops pen stac stack underflow islif stac stack underflows islif stac stacks pentwr (=pile) stacks stac (=coastal islet) stacks tas (of hay, wood) staff erwydd (in music) staff staff (=persons employed) staff development datblygiad staff staff development programme rhaglen ddatblygu staff staff development programmes rhaglen ddatblygu staff staff developments datblygiad staff staff meeting cyfarfod athrawon (of teachers) staff meetings cyfarfod athrawon (of teachers) staff mix cymysgedd o staff staff mixes cymysgedd o staff staff notation hen nodiant staff notations hen nodiant staff nurse nyrs staff staff nurses nyrs staff staff turnover trosiant staff staff turnovers trosiant staff staff-student ratio cymhareb staff-myfyrwyr staffs erwydd (in music) stage cam (=step in development) stage cyfnod (=period of time) stage ffurf (=form in insect's life cycle) stage llwyfan (=platform) stage pwynt (=point of time) stage stad (in psychology) stage coach coets fawr stage coaches coets fawr stage micrometer micrometr llwyfan stage micrometers micrometr llwyfan stage of development cyfnod datblygiad stage presentation cyflwyniad ar lwyfan stage presentations cyflwyniad ar lwyfan stagecraft crefft llwyfan stagecrafts crefft llwyfan stages cam (=step in development) stages cyfnod (=period of time) stages ffurf (=form in insect's life cycle) stages llwyfan (=platform) stages pwynt (=point of time) stages stad (in psychology) stages of dyeing camau'r llifo stages of play cyfnodau chwarae stagger darwahanu stagger nails darwahanu hoelion staggered conformation cydffurfiad alldro staggered conformations cydffurfiad alldro staggered start hwnt gychwyniad staggered starts hwnt gychwyniad staging inn tafarn y goets staging inns tafarn y goets stagnant disymud stagnant pond merllyn stagnant ponds merllyn stagnant water merddwr stagnant waters merddwr stagnation marweidd-dra stagnations marweidd-dra stain staen stain staenio stain finish gorffeniad staen stain finishs gorffeniad staen stain removal codi staen stain remover codwr staen stain removers codwr staen stain setting setio staen stained glass gwydr lliw stained glaze gwydredd lliw stained glazes gwydredd lliw stained preparation gwrthrych staenedig stained preparations gwrthrych staenedig stainless gwrthstaen stainless steel dur gwrthstaen stainless steel screw sgriw ddur wrthstaen stainless steel screws sgriw ddur wrthstaen stainless steels dur gwrthstaen stains staen stair gris stair lift cadair esgyn stair lifts cadair esgyn staircase grisiau stairs gris stairway grisffordd stake bonyn (in metalworking) stake polyn (=stout stick) stake-boat bad clwm stake-boats bad clwm stakeholder rhanddeiliad stakeholders rhanddeiliad stakes bonyn (in metalworking) stakes polyn (=stout stick) staking cane gwialen fonynnu staking canes gwialen fonynnu stalactite stalactid stalactites stalactid stalagmite stalagmid stalagmites stalagmid stale bread hen fara stale breads hen fara stalk coesyn (of flower, leaf, etc) stalk cynheilydd (=support) stalks coesyn (of flower, leaf, etc) stalks cynheilydd (=support) stallage stondiniaeth stallages stondiniaeth stamen briger stamens briger stamina stamina staminas stamina staminate brigerog staminode gau friger staminodes gau friger stammer atal dweud stammers atal dweud stamp stamp stamp taro troed (with foot) stamp duty treth stamp stamps stamp stance safiad stances safiad stanchion annel stanchions annel stand clwstwr (of trees) stand eisteddle (for spectators) stand sefyll stand stand (target) stand-alone arunig stand-alone system system arunig stand-alone systems system arunig standard safon standard safonol standard Welsh Cymraeg safonol standard atmospheric pressure gwasgedd atmosfferig safonol standard atmospheric pressures gwasgedd atmosfferig safonol standard attainment tasks tasgau asesu safonol standard bearer llumanwr standard bearers llumanwr standard business document dogfen fusnes safonol standard business documents dogfen fusnes safonol standard conditions of trading amodau safonol masnachu standard cost card cerdyn costio safonol standard cost cards cerdyn costio safonol standard costs costau safonol standard deviation gwyriad safonol standard deviations gwyriad safonol standard electrode potential potensial electrod safonol standard electrode potentials potensial electrod safonol standard enthelapy change newid enthelapi safonol standard error cyfeiliornad safonol standard errors cyfeiliornad safonol standard form ffurf safonol (of customary method) standard form ffurflen safonol (of document) standard form contract contract ffurf safonol standard form contracts contract ffurf safonol standard forms ffurf safonol (of customary method) standard forms ffurflen safonol (of document) standard gauge lled safonol standard gauges lled safonol standard interface rhyngwyneb safonol standard interfaces rhyngwyneb safonol standard interview technique dull cyfweld safonol standard interview techniques dull cyfweld safonol standard mathematical notation nodiant mathemategol safonol standard mathematical notations nodiant mathemategol safonol standard molar enthalpy enthalpi molar safonol standard of care safon gofal standard of living safon byw standard of play safon y chwarae standard parallel cyflin safonol standard parallels cyflin safonol standard pitch traw safonol standard pitches traw safonol standard random variable hapnewidyn safonol standard random variables hapnewidyn safonol standard rate cyfradd safonol standard rates cyfradd safonol standard score sgôr safonol standard scores sgôr safonol standard section trychiad safonol standard sections trychiad safonol standard size maint safonol standard size court cwrt maint safonol standard size courts cwrt maint safonol standard sizes maint safonol standard state cyflwr safonol (thermodynamics) standard states cyflwr safonol (thermodynamics) standard test prawf safonol standard tests prawf safonol standard thread edau safonol standard threads edau safonol standardize safoni standardized safonedig standardized assessment asesu safonedig standardized intelligence test prawf deallusrwydd safonedig standardized intelligence tests prawf deallusrwydd safonedig standardized marks marciau safonedig standardized test prawf safonedig standardized tests prawf safonedig standards safon standing army byddin sefydlog standing committee pwyllgor sefydlog standing committees pwyllgor sefydlog standing jump naid stond standing jumps naid stond standing orders rheolau sefydlog standing press gwasg unionsyth standing tall sefyll yn syth a thal standpoint safbwynt standpoints safbwynt stands clwstwr (of trees) stands eisteddle (for spectators) stands stand (target) stapes gwarthol staple edefyn (=fibre) staple prif (e.g. staple industry) staple stwffwl (for fastening) staple styffylu staple gun gwn styffylu staple guns gwn styffylu staple industries prif ddiwydiannau staple yarn edafedd toredig stapler styffylwr (of object) staplers styffylwr (of object) staples edefyn (=fibre) staples stwffwl (for fastening) star seren star seren llaw dde / chwith (hands across) star shake hollt seren star shakes hollt seren star-head screw sgriw ben-seren star-head screws sgriw ben-seren star-rating marciau sêr starboard starbord starboard tack tacio starbord starboards starbord starch startsh starch startsio starch reduced flour blawd startsh gostyngol starch reduced flours blawd startsh gostyngol starches startsh starchy foods bwydydd startsh stars seren stars seren llaw dde / chwith (hands across) start cychwyn start area man cychwyn start areas man cychwyn start of dance cychwyn dawns start time amser cychwyn start times amser cychwyn start-up cychwynnol start-up conditions amodau dechreuol start-up disk disg cychwynnol start-up disks disg cychwynnol starter cychwynnwr starter switch switsh cychwyn starter switches switsh cychwyn starters cychwynnwr starting bloc bloc cychwyn starting blocs bloc cychwyn starting flag lluman cychwyn starting flags lluman cychwyn starting gun ergyd cychwyn starting guns ergyd cychwyn starting line llinell gychwyn starting lines llinell gychwyn starting place man cychwyn starting places man cychwyn starting position safle cychwynnol starting positions safle cychwynnol starting software meddalwedd cychwyn starting softwares meddalwedd cychwyn starvation newyn starvations newyn starve newynu state cyflwr (=condition) state gwladwriaeth (of political community) state talaith (in USA etc) state capitalism cyfalafiaeth wladol state capitalisms cyfalafiaeth wladol state farm fferm y wladwriaeth state farms fferm y wladwriaeth state function ffwythiant cyflyrol state functions ffwythiant cyflyrol state school ysgol y wladwriaeth state schools ysgol y wladwriaeth statecraft gwladweinyddiaeth statecrafts gwladweinyddiaeth statement datganiad (=declaration) statement gosodiad (=expression in words) statement mynegiad (in computing) statement number rhif mynegiad statement numbers rhif mynegiad statement of account datganiad o gyfrif statement of attainment datganiad o gyrhaeddiad statement of competence datganiad o gymhwysedd statement of incompatibility datganiad o anghymarusrwydd statement of special educational needs datganiad anghenion addysgol arbennig statemented pupil disgybl sy'n destun datganiad statemented pupils disgybl sy'n destun datganiad statements datganiad (=declaration) statements gosodiad (=expression in words) statements mynegiad (in computing) states cyflwr (=condition) states gwladwriaeth (of political community) states talaith (in USA etc) states of matter cyflyrau mater statesman gwladweinydd statesmans gwladweinydd static statig static electricity trydan statig static screen sgrin statig static screens sgrin statig static store stôr statig static stores stôr statig statics stateg stationary sefydlog (=fixed) stationary knife cyllell sefydlog (veneer cutting) stationary knifes cyllell sefydlog (veneer cutting) stationary phase cyfnod digyfnewid (of bacteria) stationary phases cyfnod digyfnewid (of bacteria) stationary wave ton unfan stationary waves ton unfan stationer gwerthwr papurau stationers gwerthwr papurau stationery papur ysgrifennu statistic ystadegyn statistical ystadegol statistical inference casgliad ystadegol statistical inferences casgliad ystadegol statistical table tabl ystadegol statistical tables tabl ystadegol statistical test prawf ystadegol statistical tests prawf ystadegol statistically significant ystadegol bwysig statistician ystadegydd statisticians ystadegydd statistics ystadegaeth (science of) statistics ystadegau (=data) statistics ystadegyn stator stator stators stator statue cerflun statues cerflun statuette cerflun bach statuettes cerflun bach stature maintioli (of towns) statures maintioli (of towns) status statws status line llinell statws status lines llinell statws status symbol symbol o statws status symbols symbol o statws status word cyflyrair status words cyflyrair statute statud statute book llyfr statud statute books llyfr statud statute law cyfraith statud statute laws cyfraith statud statute roll rhôl statud statute rolls rhôl statud statutes statud statutory statudol statutory authority awdurdod statudol statutory body corff statudol statutory instrument offeryn statudol statutory instruments offeryn statudol statutory interpretation dehongliad statudol statutory interpretations dehongliad statudol statutory law deddf statudol statutory laws deddf statudol statutory national minimum wage isafswm cyflog gwladol statudol statutory national minimum wages isafswm cyflog gwladol statudol statutory organization corff statudol statutory organizations corff statudol statutory presumption rhagdybiaeth statudol statutory presumptions rhagdybiaeth statudol statutory requirement gofyniad statudol statutory requirements gofyniad statudol stave erwydd staves erwydd stay gwanas (rule joint) stay stitch pwyth cynnal stay stitches pwyth cynnal staying on aros ymlaen (at school) staying visitor ymwelydd sy'n aros staying visitors ymwelydd sy'n aros steady sadydd (lathe accessories) steady beat curiad cyson steady beats curiad cyson steady build-up adeiladu'n bwyllog steady current cerrynt cyson steady currents cerrynt cyson steady state cyflwr sefydlog steady states cyflwr sefydlog steadycam sadio-cam steadycams sadio-cam steam ager steam ageru steam and spray iron haearn ager a chwistrell steam and spray irons haearn ager a chwistrell steam bending agerblygu steam chest agergist steam chests agergist steam cleaning glanhau gydag ager steam coal glo rhydd steam coals glo rhydd steam de-waxing digwyro gydag ager steam distillation distyllu ag ager steam drum drwm ager steam drums drwm ager steam engine injan stêm steam engines injan stêm steam iron haearn ager steam irons haearn ager steam pump pwmp ager steam pumps pwmp ager steam turbine tyrbin ager steam turbines tyrbin ager steamroller stêm-roler steamrollers stêm-roler steams ager steamship llong ager steamships llong ager steel dur steel back saw llif gefn ddur steel back saws llif gefn ddur steel column colofn ddur steel columns colofn ddur steel filings durlifion steel framing fframwaith dur steel framings fframwaith dur steel mesh rhwyddur steel meshs rhwyddur steel racket raced ddur steel rackets raced ddur steel screw sgriw ddur steel screws sgriw ddur steel spur sbardun dur steel spurs sbardun dur steel tape tâp dur steel tapes tâp dur steel wool gwlân dur steel wools gwlân dur steel-spring cramp cramp sbring dur steel-spring cramps cramp sbring dur steels dur steelyard stiliard steelyards stiliard steep mwydo steep pitch codiad serth steep pitches codiad serth steep slope llethr serth steep slopes llethr serth steeplechase ras ffos a pherth steeplechases ras ffos a pherth steepsided serthochrog steering a course llywio cwrs steering committee pwyllgor llywio steering committees pwyllgor llywio steering wheel llyw steering wheels llyw stellar serol stellar year blwyddyn serol stellar years blwyddyn serol stellite stelit (alloying elements) stellites stelit (alloying elements) stem coes (of gauge etc) stem coesyn (of plant) stem datganiad (of multiple choice question) stem stitch pwyth conyn stem stitches pwyth conyn stems coes (of gauge etc) stems coesyn (of plant) stems datganiad (of multiple choice question) stencil stensil stencil brush brwsh stensil stencil brushs brwsh stensil stencil cutter torrell stensil stencil cutters torrell stensil stencil knife cyllell stensil stencil knifes cyllell stensil stencil paper papur stensil stencil papers papur stensil stencil pattern patrwm stensil stencil patterns patrwm stensil stencils stensil step cam (when walking and figuratively) step gris (on stairs, in dance) step stepio (in dance) step by step cam wrth gam step counter rhifydd camau step counters rhifydd camau step cutting torri step step out camu allan step round camu o amgylch step-down transformer newidydd gostwng step-down transformers newidydd gostwng step-up-transformer newidydd codi step-up-transformers newidydd codi stepfather llystad stepfathers llystad stepladder ysgol fach stepladders ysgol fach stepmother llysfam stepmothers llysfam steppe soils step-briddoedd stepped cliffs gris-glogwyni stepping reflex atgyrch camu stepping reflexes atgyrch camu steps cam (when walking and figuratively) steps gris (on stairs, in dance) steradian steradian steradians steradian stereochemical formula fformiwla stereocemegol stereochemical formulas fformiwla stereocemegol stereographic stereograffig stereographic projection tafluniad stereograffig stereographic projections tafluniad stereograffig stereophonic stereoffonig stereoscopic stereosgopig stereotype stereoteip stereotypes stereoteip stereotyping stereoteipio sterile anffrwythlon (of reproduction) sterile di-haint (=free of micro-organisms) sterile dressing gorchudd di-haint sterile dressings gorchudd di-haint sterile equipment cyfarpar di-haint sterile equipments cyfarpar di-haint sterile field maes di-haint sterile fields maes di-haint sterile glove maneg ddi-haint sterile gloves maneg ddi-haint sterility anffrwythlondeb sterilize diffrwythloni (in medical physiology) sterilize diheintio (=make free of micro-organisms) sterilizer diheintydd sterilizers diheintydd sterilizing techniques technegau diheintio sterling sterling sterling area cylch sterling sterling areas cylch sterling sterlings sterling stern starn sterns starn sternum sternwm sternums sternwm steroid steroid steroids steroid sterol sterol sterols sterol stethoscope stethosgop stethoscopes stethosgop steward stiward stewards stiward stewardship stiwardiaeth stewardships stiwardiaeth stewed apple afal wedi'i stiwio stewed apples afal wedi'i stiwio stick ffon stick glynu (adhere) stick printing printio â phren stick puppet pyped pren stick puppets pyped pren stickleback crothell sticklebacks crothell sticks ffon sticky gludiog sticky tape tâp glynu sticky tapes tâp glynu stiff anystwyth stiff board bwrdd caled stiff boards bwrdd caled stiff cover clawr caled stiff covers clawr caled stiff nut nyten glwm stiff nuts nyten glwm stiff wire gwifren anystwyth stiff wires gwifren anystwyth stiffen cyfnerthu (=strengthen) stiffened waistband band gwasg wedi'i gyfnerthu stiffened waistbands band gwasg wedi'i gyfnerthu stiffening cyfnerthydd stiffenings cyfnerthydd stiffness anhyblygedd stigma stigma (=mark on skin or butterfly wing) stigma stigma (=part of a pistil) stigmas stigma (=mark on skin or butterfly wing) stigmas stigma (=part of a pistil) stile cledren stiles cledren stiletto stileto still llonydd still birth geni'n farw still water dŵr llonydd still waters dŵr llonydd still-life bywyd llonydd still-lifes bywyd llonydd stillborn marw-anedig stillness llonyddwch stilt stilt stilts stilt stimulant symbylydd stimulants symbylydd stimulate ysgogi stimulating play chwarae ysgogol stimulus ysgogiad stimulus material deunydd ysgogi stimulus materials deunydd ysgogi sting pigiad sting pigo sting cell cell golyn sting cells cell golyn stings pigiad stipe coes stipend tâl offeiriad stipendiary magistrate ynad cyflogedig stipendiary magistrates ynad cyflogedig stipends tâl offeiriad stipes coes stipple dotwaith stipple dotweithio stipple drawing lluniad dotwaith stipple drawings lluniad dotwaith stipple engraving ysgythriad dotwaith stipple engravings ysgythriad dotwaith stipples dotwaith stipule stipwl stipules stipwl stir troi stirrer tröydd stirrer fan gwyntyll droelli stirrer fans gwyntyll droelli stirrers tröydd stirring cyffrous (of music etc) stirring rod rhoden droi stirring rods rhoden droi stirrup gwarthol stirrup strap strap warthol stirrup straps strap warthol stirrups gwarthol stitch pwyth stitch pwytho stitch holder pìn cadw pwythau stitch holders pìn cadw pwythau stitch length adjustment rheolydd hyd pwyth (of machine part) stitch length adjustments rheolydd hyd pwyth (of machine part) stitched calico mop mop calico wedi'i bwytho stitched calico mops mop calico wedi'i bwytho stitchery pwythwaith stitches pwyth stitching frame ffrâm bwytho stitching frames ffrâm bwytho stitching press gwasg bwytho stitching tool erfyn pwytho stitching tools erfyn pwytho stochastic stocastig stock cyff (of tree etc) stock dwrn (of machine) stock llinach (=line of ancestry) stock stoc (in finance) stock and dies cyffion a deiau stock control rheolaeth stoc stock control rheoli stoc stock controls rheolaeth stoc stock exchange cyfnewidfa stoc stock exchanges cyfnewidfa stoc stock market marchnad stoc stock markets marchnad stoc stock pile pentwr stoc stock pile pentyrru stoc stock piles pentwr stoc stock turnover trosiant stoc stock turnovers trosiant stoc stockbroker brocer stoc stockbrokers brocer stoc stockhorn pibgorn stockhorns pibgorn stockinette stocinét stockinettes stocinét stocking hosan stocking stitch pwyth plaen stocking stitches pwyth plaen stockings hosan stocks cyff (of tree etc) stocks cyffion traed stocks dwrn (of machine) stocks llinach (=line of ancestry) stocks stoc (in finance) stoichiometric stoichiometrig stoichiometric equation hafaliad stoichiometrig stoichiometric equations hafaliad stoichiometrig stoichiometry stoichiometreg stole stôl (of costume) stole ystola (of church vestment) stoles stôl (of costume) stoles ystola (of church vestment) stoloniferous stolonog stoma stoma stomach stumog stomach acid asid y stumog stomach acids asid y stumog stomach bile bustl y stumog stomach biles bustl y stumog stomach ulcer briw'r stumog stomach ulcers briw'r stumog stomaches stumog stomas stoma stomium stomiwm stomiums stomiwm stone carreg stone architecture gwaith carreg pensaernïol stone architectures gwaith carreg pensaernïol stone axe bwyell garreg stone axes bwyell garreg stone carving cerfio carreg stone cell cell garreg stone cells cell garreg stone fruit ffrwyth carreg stone fruits ffrwyth carreg stone-tumbling carreg-dwmblo stones carreg stoneware crochenwaith caled stoneware glaze gwydredd crochenwaith stoneware glazes gwydredd crochenwaith stonewares crochenwaith caled stonework gwaith carreg stoneworks gwaith carreg stool carthion (=faeces) stool stôl (for sitting on) stool construction adeiladwaith stôl stool constructions adeiladwaith stôl stools stôl (for sitting on) stop atal (=prevent) stop atal (a note on musical intrument) stop stop (on organ) stop dead stopio'n stond stop motion stop-symudiad stop motions stop-symudiad stop the ball atal y bêl stop volley foli stop stop-clock stopgloc stop-clocks stopgloc stop-start atal a chychwyn stoppage ataliad stoppages ataliad stopped wedi'i atal (of note on organ, wind and string instrument) stopped chamfer siamffer cau stopped chamfers siamffer cau stopped dovetail housing joint uniad rhigol drawsgynffonnog gau stopped dovetail housing joints uniad rhigol drawsgynffonnog gau stopped housing rhigol gau stopped housing joint uniad rhigol draws gau stopped housing joints uniad rhigol draws gau stopped housings rhigol gau stopped mortise and tenon joint uniad mortais a thyno cau stopped mortise and tenon joints uniad mortais a thyno cau stopped rabbet rabad cau stopped rabbets rabad cau stopped tenon tyno cau stopped tenons tyno cau stopper caead stoppered bottle potel â thopyn stoppered bottles potel â thopyn stoppers caead stopping distance pellter stopio stopping distances pellter stopio stopping the ball by kneeling atal y bêl drwy benlinio stopping-out varnish farnais atal stopping-out varnishs farnais atal stops stop (on organ) storage storfa (of place) storage allocation dyraniad storfa storage allocations dyraniad storfa storage capacity cynhwysedd storio storage cupboard cwpwrdd storio storage cupboards cwpwrdd storio storage drawer drôr storio storage drawers drôr storio storage heater gwresogydd stôr storage heaters gwresogydd stôr storage jar cawg storio storage jars cawg storio storage organ organ storio storage organs organ storio storage space lle storio storage spaces lle storio storage tank tanc storio storage tanks tanc storio storages storfa (of place) store siop (=shop) store storfa (=place of storage) store storio store stôr (=supply) store a composition storio cyfansoddiad store control unit uned rheoli storfa store control units uned rheoli storfa store information storio gwybodaeth stored carbohydrate carbohydrad stôr stored carbohydrates carbohydrad stôr stored point pwynt stôr stored points pwynt stôr stores siop (=shop) stores storfa (=place of storage) stores stôr (=supply) storey llawr storing food storio bwyd storm beach stormdraeth storm beaches stormdraeth stormtroopers stormfilwyr story stori story book llyfr stori story books llyfr stori story method dull storïol story methods dull storïol story order trefn y stori story orders trefn y stori storyboard bwrdd stori storyboards bwrdd stori stoss and lee llyfn a sgythrog stoutheart plywood pren haenog canol trwchus stoutheart plywoods pren haenog canol trwchus stove stof stoves stof stow stow stows stow straddle llednaid straddle jump naid fforchog straddle jumps naid fforchog straddler lledneidiwr straddlers lledneidiwr straddles llednaid straight syth straight angle ongl syth straight angles ongl syth straight bit haearn sodro syth straight bits haearn sodro syth straight bodkin botgin syth straight bodkins botgin syth straight collar coler syth straight collars coler syth straight drive dreif syth straight drives dreif syth straight edge ymyl syth straight edges ymyl syth straight flute drill dril ffliwt syth straight flute drills dril ffliwt syth straight grain graen union straight grains graen union straight handle dolen syth (hacksaw frame) straight handles dolen syth (hacksaw frame) straight knurl nwrl syth straight knurls nwrl syth straight left chwith syth straight line llinell syth straight lines llinell syth straight pass pàs syth straight peen wyneb syth straight peen hammer morthwyl wyneb syth straight peen hammers morthwyl wyneb syth straight peens wyneb syth straight right de syth straight rights de syth straight shank garan syth straight shank drill dril garan syth straight shank drills dril garan syth straight shanks garan syth straight skirt sgert syth straight skirts sgert syth straight snips snipiwr syth straight taper tapr syth straight tapers tapr syth straight tinsnips snipiwr tun syth straight-toothed milling cutter melinwr dant union straight-toothed milling cutters melinwr dant union straighten unioni strain cainc (=piece of music) strain hidlo (liquid) strain rhywogaeth (in biology) strain straen (emotional, in physics, mathematics) strain ysigiad (physical) strain ysigo (physical) strain gauge medrydd straen strain gauges medrydd straen strained foods bwydydd wedi'u hidlo strainer hidlen strainers hidlen straining pliers gefelen dynhau strains cainc (=piece of music) strains rhywogaeth (in biology) strains straen (emotional, in physics, mathematics) strains ysigiad (physical) strait culfor straits culfor strand cainc (of cotton etc) strand ceincio strand llinyn (to argument etc) strand traethell (of beach) strand of DNA edefyn DNA stranded ceinciog (of cotton etc) stranding ceincio strandline traethlin strandlines traethlin strands cainc (of cotton etc) strands llinyn (to argument etc) strands traethell (of beach) strap strap strap hinge colfach strap strap hinges colfach strap straps strap strategic strategol strategic alliance cysylltiad strategol strategic alliances cysylltiad strategol strategy strategaeth strath ystrad straths ystrad stratification haeniad stratifications haeniad stratified haenedig stratified epithelium epitheliwm haenedig stratified epitheliums epitheliwm haenedig stratified random sampling hapsamplu haenedig stratified sample sampl haenedig stratified samples sampl haenedig stratified sampling samplu haenedig stratiform haenol stratigraphical table tabl stratigraffig stratigraphical tables tabl stratigraffig stratigraphy stratigraffeg stratosphere stratosffer stratospheres stratosffer stratospheric stratosfferig stratum stratwm stratums stratwm straw gwelltyn strawberries mefus strawboard bwrdd gwellt strawboards bwrdd gwellt straws gwelltyn streaky bacon cig moch brith streaky bacons cig moch brith stream ffrwd (used figuratively) stream ffrydio (in school) stream llif (=flow) stream nant (=small river) stream orders graddau ffrwd stream source tarddiad nant stream sources tarddiad nant streamflow ffrydlif streamflows ffrydlif streamless di-ffrwd streamline llilin streamline llilinio streamline flow llif llilin streamline flows llif llilin streamlined llyfn streamlines llilin streams ffrwd (used figuratively) streams llif (=flow) streams nant (=small river) street scape strydlun street scapes strydlun strength cryfder (in general) strength nerth (of sound) strengthen cryfhau strengthen the body cryfhau'r corff strengthening movement symudiad cryfhau strengthening movements symudiad cryfhau strengths cryfder (in general) strengths nerth (of sound) stress acen (=accent) stress diriant (in physics and chemistry) stress straen (in general) stress tyndra (in biology) stress response ymateb straen stress responses ymateb straen stressor straenachoswr stressors straenachoswr stretch darn (of water) stretch estyn stretch ymestyn stretch fabric ffabrig ymestyn stretch fabrics ffabrig ymestyn stretch receptor derbynnydd ymestynnedd stretch receptors derbynnydd ymestynnedd stretch the muscles llaesu'r cyhyrau stretched estynedig stretcher estynnwr (=frame) stretcher stretsier (for injured person) stretcher piece darn estyn stretcher pieces darn estyn stretcher pliers gefelen estyn stretcher rail rheilen gynnal stretcher rails rheilen gynnal stretchers estynnwr (=frame) stretchers stretsier (for injured person) stretches darn (of water) strewing gwasgaru striated rhesog (=striped muscle) striated rhychedig striation rhychiad striations rhychiad strickle striclo strickle bar bar striclo strickle bars bar striclo strickling tool erfyn striclo strickling tools erfyn striclo strict caeth strict counterpoint gwrthbwynt caeth strict counterpoints gwrthbwynt caeth strict liability atebolrwydd caeth strict metre mesur caeth strict metres mesur caeth stricture culfan (medical) strictures culfan (medical) stride camu stridulation grillian strike ergyd (=blow) strike streic (=cessation of work as protest) strike streicio (=cease work as protest) strike taro (=hit) strike breaker torrwr streic strike breakers torrwr streic strike-slip streic-rwyg strike-slips streic-rwyg striker ergydiwr (in cricket) striker saethwr (in football) striker streiciwr (in industrial dispute) striker's plate plât yr ergydiwr striker's plates plât yr ergydiwr strikers ergydiwr (in cricket) strikers saethwr (in football) strikers streiciwr (in industrial dispute) strikes ergyd (=blow) strikes streic (=cessation of work as protest) striking button botwm taro striking buttons botwm taro striking circle cylch saethu striking circles cylch saethu striking game gêm daro striking games gêm daro striking head trawben striking heads trawben striking plate plât taro striking plates plât taro striking tool erfyn taro striking tools erfyn taro string llinyn (=narrow cord) string llinynnu string tant (on musical instrument, racket) string board bwrdd cynnal (stairs) string boards bwrdd cynnal (stairs) string course llin-gwrs string courses llin-gwrs string cramp cramp cortyn string cramps cramp cortyn string handling trin llinynnau string marionette marionét llinyn string marionettes marionét llinyn string puppet pyped llinyn string puppets pyped llinyn string quartet pedwarawd llinynnol string quartets pedwarawd llinynnol string section adran llinynnau string sections adran llinynnau string solo unawd llinynnol string variable newidyn llinynnol string variables newidyn llinynnol stringed instrument offeryn llinynnol stringed instruments offeryn llinynnol stringer ochr grisiau stringers ochr grisiau stringers stringeri strings llinyn (=narrow cord) strings llinynnau (in orchestra, inlaying) strings tant (on musical instrument, racket) strip llain (in agriculture) strip stribed (of material) strip stripio strip cartoon cartŵn stribed strip cartoons cartŵn stribed strip cultivation llaindriniad strip cultivations llaindriniad strip development datblygiad hirgul strip developments datblygiad hirgul strip foundation sylfaen stribed strip foundations sylfaen stribed strip holding llainddaliad strip holdings llainddaliad strip lighting golau stribed strip lightings golau stribed strip mill melin strip strip mills melin strip strip opening agoriad di-dor strip openings agoriad di-dor stripe rhes striped rhesog stripes rhes stripping stripio strips llain (in agriculture) strips stribed (of material) strobe pulse curiad strôb strobe pulses curiad strôb stroboscope strobosgop stroboscopes strobosgop stroke dull (=mode of swimming) stroke ergyd (with bat or racket) stroke ergydio stroke strôc (=the whole of the motion) stroke strôc (medical condition) stroke play chwarae strôc stroke side ochr strôc stroke side under ochr strôc dani stroke side unders ochr strôc dani stroke sides ochr strôc stroke technique techneg strôc stroke techniques techneg strôc stroked gathers crychau nodwydd strokes dull (=mode of swimming) strokes ergyd (with bat or racket) strokes strôc (=the whole of the motion) strokes strôc (medical condition) strong cryf strong acid asid cryf strong acids asid cryf strong base bas cryf strong bases bas cryf strong flour blawd cryf strong flours blawd cryf strong racket raced gref strong rackets raced gref strong runner rhedwr cryf strong runners rhedwr cryf stronghold cadarnle strongholds cadarnle strontium strontiwm (Sr) strontium carbonate strontiwm carbonad strontium carbonates strontiwm carbonad strontium sulphate strontiwm sylffad strontium sulphates strontiwm sylffad strontiums strontiwm (Sr) strop strapen hogi strophic stroffig strops strapen hogi structural adeileddol (of buildings) structural strwythurol (of administration) structural basin basn adeileddol structural basins basn adeileddol structural difference gwahaniaeth adeileddol structural differences gwahaniaeth adeileddol structural formula fformiwla adeileddol structural formulas fformiwla adeileddol structural isomerism isomeredd adeileddol structural isomerisms isomeredd adeileddol structural member rhan strwythurol structural members rhan strwythurol structural reason rheswm adeileddol structural reasons rheswm adeileddol structural unemployment diweithdra strwythurol structural unemployments diweithdra strwythurol structural weakness gwendid adeileddol structure adeiladwaith (=way in which something is constructed) structure adeiledd (of constructed objects) structure fframwaith (=framework) structure ffurfiad (a single, definable) structure strwythur (in administration etc) structure elucidation egluro adeiledd structure plan cynllun fframwaith structure plans cynllun fframwaith structure-process-stage adeiledd-proses-cam structure-process-stages adeiledd-proses-cam structured strwythuredig structured health related exercise programme rhaglen ymarfer strwythuredig sy'n gysylltiedig ag iechyd structured health related exercise programmes rhaglen ymarfer strwythuredig sy'n gysylltiedig ag iechyd structured language iaith strwythuredig structured languages iaith strwythuredig structured play chwarae strwythuredig structured programming rhaglennu strwythurol structured question cwestiwn strwythuredig structured questions cwestiwn strwythuredig structures adeiladwaith (=way in which something is constructed) structures adeiledd (of constructed objects) structures fframwaith (=framework) structures ffurfiad (a single, definable) structures strwythur (in administration etc) struggle brwydro struggle for existence ymdrech i fodoli struggle for survival ymdrech i oroesi strut eisen (e.g. on guitar) strut pwyslath struts eisen (e.g. on guitar) struts pwyslath strutted instrument offeryn eisedig strutted instruments offeryn eisedig strutting cynheilio croes stub bonyn stub axle echel bwt stub axles echel bwt stub mortise and tenon joint uniad mortais a thyno pwt stub mortise and tenon joints uniad mortais a thyno pwt stub tenon tyno pwt stub tenons tyno pwt stubborn ystyfnig stubnose trwyn byr stubnoses trwyn byr stubs bonyn stucco stwco stuck moulding mowldin solet stuck mouldings mowldin solet stud styden stud anchor angor styden stud anchors angor styden stud box blwch stydiau stud boxes blwch stydiau student myfyriwr (male and general) student myfyrwraig (female) student loan benthyciad i fyfyrwyr student loans benthyciad i fyfyrwyr student nurse myfyriwr nyrsio student nurses myfyriwr nyrsio student record cofnod myfyriwr student records cofnod myfyriwr students myfyriwr (male and general) students myfyrwraig (female) students' union undeb myfyrwyr students' unions undeb myfyrwyr studies efrydiau (academic) studies director cyfarwyddwr astudiaethau studies directors cyfarwyddwr astudiaethau studio stiwdio studio easel îsl stiwdio studio easels îsl stiwdio studs styden study astudiaeth study astudio study in depth astudiaeth fanwl stuff stwffio stuffed fabric ffabrig wedi'i stwffio stuffed fabrics ffabrig wedi'i stwffio stumbling block maen tramgwydd stumbling blocks maen tramgwydd stump stwmp stump stympio stumper stympiwr stumpers stympiwr stumps stwmp stunted corachaidd sturdy beggars cardotwyr holliach style arddull (=idiom) style colofnig (in botany) style styl (in zoology) style of accompaniment arddull y cyfeiliant styles arddull (=idiom) styles colofnig (in botany) styles styl (in zoology) stylistic arddulliadol styrene styren styrenes styren styrofoam ewyn styro styrofoams ewyn styro sub-let is-osod sub-machine gun peirianddryll bychan sub-machine guns peirianddryll bychan sub-multiple angles onglau ffracsiynol sub-program is-raglen sub-programs is-raglen sub-station is-orsaf sub-stations is-orsaf sub-string is-linyn sub-strings is-linyn sub-system is-system sub-systems is-system sub-tree is-goeden sub-trees is-goeden subacute cymedrol ddifrifol subadults is-oedolion subaerial isawyrol subalpine government llywodraeth isalpaidd subalpine governments llywodraeth isalpaidd subcellular isgellog subclass isddosbarth subclavian isglafiglaidd subcommittee is-bwyllgor subcommittees is-bwyllgor subcontract is-gontract subcontract is-gontractio subcontracts is-gontract subculture isddiwylliant subcultures isddiwylliant subcutaneous isgroenol subdirectory is-gyfeiriadur subdivide isrannu subdivision israniad subdivisions israniad subdominant is-lywydd subdominants is-lywydd subduction tansugno subdue darostwng subdued relief tirwedd iselaidd subdued reliefs tirwedd iselaidd suberin swberin suberins swberin subfactorial is-ffactorial subfactorials is-ffactorial subfile is-ffeil subfiles is-ffeil subglacial channel sianel danrewlifol subglacial channels sianel danrewlifol subglacial moraine marian tanrewlifol subglacial moraines marian tanrewlifol subglacial stream ffrwd danrewlifol subglacial streams ffrwd danrewlifol subgroup is-grŵp subgroups is-grŵp subharmonic is-harmonig subharmonics is-harmonig subheading is-bennawd subheadings is-bennawd subhumid islaith subinfeudate is-ffeodu subinfeudation is-ffeodaeth subinfeudations is-ffeodaeth subject deiliad (to a monarch) subject goddrych (in grammar) subject pwnc (=department or field of study) subject testun (=theme) subject content cynnwys pwnc subject contents cynnwys pwnc subject teacher athrawes pwnc (female) subject teacher athro pwnc (male) subject teachers athrawes pwnc (female) subject teachers athro pwnc (male) subject to contract yn ôl cytundeb subject working group gweithgor pwnc subject working groups gweithgor pwnc subject-centred pwnc-ganolog subject-specific pwnc-benodol subjectivation goddrychiad subjectivations goddrychiad subjective goddrychol subjective assessment asesiad goddrychol subjective assessments asesiad goddrychol subjective probability tebygolrwydd goddrychol subjectivity goddrychedd subjects deiliad (to a monarch) subjects goddrych (in grammar) subjects pwnc (=department or field of study) subjects testun (=theme) subjugate darostwng sublimate sychdarth sublimate sychdarthu sublimates sychdarth sublimation sychdarthiad (in chemistry) sublimations sychdarthiad (in chemistry) sublingual isdafodol submandibular isfandiblaidd submarine llong danfor submarine tanfor submarines llong danfor submature isaeddfed submaxillary isfacsilaidd submediant isfeidion submediants isfeidion submerge soddi submerged soddedig submerged forest coedwig soddedig submerged forests coedwig soddedig submerged leaf deilen soddedig submerged leafs deilen soddedig submission argymhelliad (=proposal) submission ymostyngiad (=surrender) submissions argymhelliad (=proposal) submissions ymostyngiad (=surrender) submissive ymostyngol subneural isniwral subnormal isnormal suboctave iswythfed suboctaves iswythfed suborder is-urdd suborders is-urdd subpharyngeal isffaryngeal subprogram library llyfrgell israglen subregion isranbarth subregions isranbarth subroutine is-reolwaith subroutines is-reolwaith subscribe cefnogi (to an opinion) subscribe tanysgrifio (to a magazine etc) subscriber tanysgrifiwr subscribers tanysgrifiwr subscript is-nod subscription tanysgrifiad subscriptions tanysgrifiad subscripts is-nod subsequence is-ddilyniant subsequences is-ddilyniant subsequent dilynol (in general) subsequent trawslif (stream) subsequent stream ffrwd drawslif subsequent streams ffrwd drawslif subsequents trawslif (stream) subservience gwaseidd-dra subserviences gwaseidd-dra subservient gwasaidd subset is-set subsets is-set subside ymsuddo subsidence ymsuddiant (of land) subsidences ymsuddiant (of land) subsidiarity cyfrifolaeth subsidiary atodol subsidiary is-gwmni subsidiary course cwrs atodol subsidiary courses cwrs atodol subsidiary grant grant atodol subsidiary grants grant atodol subsidiary subject pwnc atodol subsidiary subjects pwnc atodol subsidy cymhorthdal subsistence cynhaliaeth subsistence ymgynhaliol subsistence allowance lwfans cynnal subsistence allowances lwfans cynnal subsistence crop cnwd cynnal subsistence crops cnwd cynnal subsistence farming ffermio ymgynhaliol subsistences cynhaliaeth subsoil isbridd subsoils isbridd subsonic is-sonig subspecies isrywogaeth substance sylwedd substance accumulation in tissue sylwedd yn ymgasglu mewn meinwe substances sylwedd substandard is-safonol substitute amnewid (a substance) substitute amnewidyn (of substance) substitute dirprwyo (a person) substitute eilydd (of person) substitute clausula dirprwy glawswla substitute clausulas dirprwy glawswla substitute x for y amnewid y am x substitutes amnewidyn (of substance) substitutes eilydd (of person) substitution amnewidiad (of substance) substitution eilyddio (in sport) substitution reaction adwaith amnewid substitution reactions adwaith amnewid substitutions amnewidiad (of substance) substrate is-haen (in physics) substrate swbstrad (in relation to enzymes) substrates is-haen (in physics) substrates swbstrad (in relation to enzymes) substratum is-haen substratums is-haen subtangent istangiad subtangents istangiad subtend cynnal subtended angle ongl a gynhelir subtended angles ongl a gynhelir subterranean tanddaearol subtitle isdeitl subtitles isdeitl subtle cynnil subtle change newid cynnil subtle changes newid cynnil subtle movement symudiad cynnil subtle movements symudiad cynnil subtotal isgyfanswm subtotals isgyfanswm subtown istref subtowns istref subtract tynnu subtraction tynnu subtraction problem problem dynnu subtraction problems problem dynnu subtractive tynnol subtractive bilingualism dwyieithrwydd gostyngol subtractive bilingualisms dwyieithrwydd gostyngol subtractive printing printio tynnol subtropical istrofannol suburb maestref suburban maestrefol suburban history hanes maestrefol suburbia maestrefi suburbs maestref subversion tanseilio subversive tanseiliol subversive tanseiliwr subversives tanseiliwr subvert gwyrdroi subvert tanseilio subway tanlwybr subway Samaritans Samariaid y trenau tanddaearol succeed llwyddo (=have success) succeed olynu (=come after) succentor ail gantor succentors ail gantor success llwyddiant succession olyniaeth succession of rocks olyniaeth creigiau successions olyniaeth successive olynol successor olynydd successors olynydd succinic sycsinig succulence suddlonedd succulences suddlonedd succulent suddlon succulent plant planhigyn suddlon succulent plants planhigyn suddlon suck sugno sucker sugnolyn suckers sugnolyn sucking reflex atgyrch sugno sucking reflexes atgyrch sugno suckle rhoi'r fron suckle sugno'r fron sucrose swcros sucrose solution hydoddiant swcros sucrose solutions hydoddiant swcros sucroses swcros suction sugnedd suction pressure gwasgedd sugno suction pressures gwasgedd sugno suction pump pwmp sugno suction pumps pwmp sugno suction tube tiwb sugno suction tubes tiwb sugno suctions sugnedd sudd swd sudden change newid sydyn sudden changes newid sydyn sudds swd suds trochion suds sensitive machine peiriant sensitif i drochion suds sensitive machines peiriant sensitif i drochion suds tolerant machine peiriant goddef trochion suds tolerant machines peiriant goddef trochion suede finish gorffeniad swêd suede finishs gorffeniad swêd sufficient digon suffix olddodiad suffixes olddodiad suffocate mygu suffragan swffragan suffragans swffragan suffrage pleidlais suffrages pleidlais suffragette swffragét suffragettes swffragét suffragist swffragydd suffragists swffragydd sugar siwgr sugar beet betys siwgr sugar loaf torth siwgr sugar loafs torth siwgr sugar paper papur siwgr sugar papers papur siwgr sugar-loaf mandrel mandrel côn sugar-loaf mandrels mandrel côn sugars siwgr suggest awgrymu suggestion awgrym suggestions awgrym suicide hunanladdiad suicide troops milwyr hunanleiddiol suicides hunanladdiad suit of armour arfwisg suit of court dyledogaeth llys suitability cyfaddasrwydd suitable background cefndir addas suitable backgrounds cefndir addas suitable material defnydd addas suitable materials defnydd addas suite cyfres suite de danses dawns gyfres suited addas suites cyfres suiting siwtin suitings siwtin suitor cwynwr suitors cwynwr sulphate sylffad sulphate attack ymosodiad sylffad sulphate attacks ymosodiad sylffad sulphates sylffad sulphide sylffid sulphides sylffid sulphur sylffwr sulphuric sylffwrig sulphuric acid asid sylffwrig sulphuric acids asid sylffwrig sulphurics sylffwrig sulphurs sylffwr sum swm sum total cyfanswm sum totals cyfanswm summable symadwy summary crynodeb summary offence trosedd ddiannod summary offences trosedd ddiannod summation symiant summations symiant summative project project crynodol summative projects project crynodol summer camp gwersyll haf summer camps gwersyll haf summer holidays gwyliau haf summer house tŷ haf summer houses tŷ haf summer months misoedd yr haf summer representative cynrychiolydd haf summer representatives cynrychiolydd haf summer school ysgol haf summer schools ysgol haf summer season tymor yr haf summer seasons tymor yr haf summer solstice heuldro'r haf summer solstices heuldro'r haf summer term tymor yr haf summer terms tymor yr haf summer wood pren yr haf summer woods pren yr haf summit copa summit conference uwchgynhadledd summit conferences uwchgynhadledd summit plain gwastadedd copa summit plains gwastadedd copa summits copa summoner gwysiwr summoners gwysiwr sump swmp sumps swmp sumptuary laws deddfau cyfyngu sun haul sun proof gwrth-haul sun terrace teras haul sun terraces teras haul sun-suit gwisg haul sun-suits gwisg haul sun-top top haul sun-tops top haul sunburn llosg haul sunburns llosg haul sunflower blodyn yr haul sunflowers blodyn yr haul sunk moulding mowldin suddo sunk mouldings mowldin suddo sunk panel panel wedi'i suddo sunk panels panel wedi'i suddo sunlight golau haul sunlights golau haul sunna sunna sunnas sunna sunray pleating pletio pelydrog sunrise pattern patrwm codiad yr haul sunrise patterns patrwm codiad yr haul sunshine heulwen sunshines heulwen sunspots brychau haul sunstroke twymyn haul sunstrokes twymyn haul super giant star seren orgawr super giant stars seren orgawr super powers pwerau mawr super state archwladwriaeth super states archwladwriaeth super video graphics array arae graffeg fideo uwch superannuation budd-dal ymddeol superannuations budd-dal ymddeol superconductivity gorddargludedd supercool goroer supercool goroeri supercooled goroeredig superficial deposits dyddodion arwynebol supergrid uwchgrid supergrids uwchgrid superhet uwch-heterodein superimpose arosod superimposed arosod superimposed drainage draeniad arosod superimposed drainages draeniad arosod superintendent uwch-arolygydd superintendents uwch-arolygydd superior uwch (of anatomy) superiority rhagoriaeth supermarket uwchfarchnad supermarket chain cadwyn o uwchfarchnadoedd supermarket chains cadwyn o uwchfarchnadoedd supermarkets uwchfarchnad supernatant uwchwaddod supernatants uwchwaddod supernatural goruwchnaturiol supernormal profit elw goruwchnormal supernormal profits elw goruwchnormal supernova uwchnofa supernovas uwchnofa superoctave uwchwythfed superoctaves uwchwythfed superosculate uwchfinialu superosculating uwchfinialaidd superpose arosod superposed fourths pedweryddau arosodedig superposition arosodiad superpositions arosodiad supersaturate gorddirlenwi supersaturated gorddirlawn supersaturation gorddirlawnder supersaturations gorddirlawnder superscript uwchysgrif superscripts uwchysgrif superset uwchset supersets uwchset supersonic uwchsonig superstition ofergoeliaeth (in general) superstitions ofergoeliaeth (in general) superstructure aradeiledd superstructures aradeiledd supertonic uwch donydd supertonics uwch donydd supervised study astudio dan oruchwyliaeth supervision goruchwyliaeth supervision order gorchymyn goruchwyliaeth supervision orders gorchymyn goruchwyliaeth supervisions goruchwyliaeth supervisor goruchwyliwr supervisors goruchwyliwr supination swpinadiad (of foot motion) supinations swpinadiad (of foot motion) supine ar wastad ei chefn (with feminine nouns) supine ar wastad ei gefn (with masculine nouns) supple ystwyth supple twig brigyn ystwyth supple twigs brigyn ystwyth supplement ychwanegyn (in food) supplementary atodol supplementary allocation dyraniad atodol supplementary allocations dyraniad atodol supplementary angle ongl atodol supplementary angles ongl atodol supplementary benefit budd-dal atodol supplementary benefits budd-dal atodol supplementary sketches brasluniau atodol supplementation atchwanegiad supplementations atchwanegiad supplements ychwanegyn (in food) suppleness ystwythder supplied quantity maint y cyflenwad (in economics) supply cyflenwad (of food etc) supply cyflenwi supply prif gyflenwad (mains) supply and demand cyflenwad a galw supply and demand graph graff cyflenwad a galw supply and demand graphs graff cyflenwad a galw supply curve cromlin gyflenwad supply curves cromlin gyflenwad supply lines ffyrdd cyflenwi supply teacher athrawes lanw (female) supply teacher athro llanw (male) supply teachers athrawes lanw (female) supply teachers athro llanw (male) supply-side policies polisi ochr gyflenwi support ategu (an argument) support cefnogaeth (passive) support cefnogi (passive) support cymorth (active) support cynhaliad (=prop, skeletal function) support cynhalydd (of piece of equipment) support cynnal (structures etc) support cynorthwyo (active) support ymgynnal (oneself) support booklet llyfryn cymorth support booklets llyfryn cymorth support group grŵp cefnogi support groups grŵp cefnogi support materials deunyddiau atodol support position safle cynnal support positions safle cynnal supported self-study astudio unigol gyda chymorth supporter cefnogwr supporters cefnogwr supporting stool stôl gynnal (for cabinet) supporting stools stôl gynnal (for cabinet) supporting tissue meinwe gynhaliol supporting tissues meinwe gynhaliol supportive cefnogol supports cefnogaeth (passive) supports cymorth (active) supports cynhaliad (=prop, skeletal function) supports cynhalydd (of piece of equipment) suppository tawddgyffur suppress atal suppressed immunity imiwnedd ataliedig suppression ataliad suppressions ataliad suprapharyngeal uwchffaryngeal supremacist goruchafwr supremacists goruchafwr supremacy goruchafiaeth supreme goruchaf supremum swpremwm surah surah surahs surah surazo swraso surcharge tâl ychwanegol surcharges tâl ychwanegol surcoat crysbais surcoats crysbais surd swrd surds swrd surety mach surety bail mechnïaeth surety bails mechnïaeth suretyship mechnïaeth suretyships mechnïaeth surf ewyn môr surface arwyneb surface area arwynebedd arwyneb surface areas arwynebedd arwyneb surface decoration addurn arwyneb surface decorations addurn arwyneb surface development datblygiad arwyneb surface developments datblygiad arwyneb surface dive deif arwyneb surface dives deif arwyneb surface embroidery brodwaith arwyneb surface engraving ysgythriad arwyneb surface engravings ysgythriad arwyneb surface finish gorffeniad arwyneb surface finishing gorffen arwyneb surface finishs gorffeniad arwyneb surface gauge medrydd arwyneb surface gauges medrydd arwyneb surface membrane pilen arwyneb surface membranes pilen arwyneb surface of revolution arwyneb cylchdro surface plate plât arwyneb surface plates plât arwyneb surface scratches crafiadau arwyneb surface stain staen arwyneb surface stains staen arwyneb surface storage storfa arwyneb surface storages storfa arwyneb surface table bwrdd arwyneb surface tables bwrdd arwyneb surface tension tyniant arwyneb surface tensions tyniant arwyneb surface treatment triniaeth arwyneb surface treatments triniaeth arwyneb surface view uwcholwg surface views uwcholwg surface water dŵr wyneb surface waters dŵr wyneb surfaces arwyneb surfactant arwynebydd (surface active agent) surfactants arwynebydd (surface active agent) surfer brigdonnwr surfers brigdonnwr surfs ewyn môr surge dygyfor surge ymchwydd surgeon llawfeddyg surgeons llawfeddyg surgery llawfeddygaeth (=branch of medicine) surgery meddygfa (of place) surges ymchwydd surjective mapping mapio arsaethol surplice gwenwisg surplices gwenwisg surplus gwarged (in accounting) surplus gweddill (=amount left over) surplus variable newidyn gweddill surplus variables newidyn gweddill surprise cadence diweddeb annisgwyl surprise cadences diweddeb annisgwyl surrealism swrealaeth surrealisms swrealaeth surrealist swrealydd surrealists swrealydd surrender ildio surround amgylchyn surround amgylchynu surrounds amgylchyn surtax gordreth surtaxes gordreth surtitle uwchdeitl surtitles uwchdeitl survey arolwg (of evidence etc) survey gwneud arolwg (in general) survey tirfesur (of land) surveying equipment offer tirfesur surveyor syrfëwr (in general) surveyor tirfesurydd (of land) surveyors syrfëwr (in general) surveyors tirfesurydd (of land) surveyor’s levels lefelau syrfëwr survival goroesiad survival of the fittest goroesiad y cymhwysaf survival rate cyfradd goroesi survival rates cyfradd goroesi survival value gwerth goroesol survival values gwerth goroesol survivals goroesiad survive goroesi survivor goroeswr survivors goroeswr survivorship goroesedd survivorships goroesedd susceptibility derbynnedd susceptibility rhagdueddiad suspend diarddel suspend gwahardd dros dro (from school) suspend hongian (=hang) suspended crog (=hanging) suspended ynghrog suspended cadence diweddeb ohiriedig suspended cadences diweddeb ohiriedig suspended drawer drôr crog suspended drawers drôr crog suspended floor llawr crog suspended floors llawr crog suspended light golau crog suspended lights golau crog suspended note gohirnod suspended notes gohirnod suspended sculpture cerflunwaith crog suspended sculptures cerflunwaith crog suspended sentence dedfryd ohiriedig suspended sentences dedfryd ohiriedig suspending agent cyfrwng daliant suspending agents cyfrwng daliant suspending power hawl atal (from work etc) suspending powers hawl atal (from work etc) suspension crogiant (of objects) suspension daliant (particles in liquid, etc) suspension gohiriant (in music) suspension gwaharddiad dros dro (from school) suspension hongiad (of car) suspension bridge pont grog suspension bridges pont grog suspensions crogiant (of objects) suspensions daliant (particles in liquid, etc) suspensions gohiriant (in music) suspensions gwaharddiad dros dro (from school) suspensions hongiad (of car) suspensory cynhaliol suspensory ligament gewyn cynhaliol suspensory ligaments gewyn cynhaliol sustain activity cynnal gweithgarwch sustainable cynaliadwy sustainable development datblygiad cynaliadwy sustainable developments datblygiad cynaliadwy sustainable economic growth twf economaidd cynaliadwy sustainable economic growths twf economaidd cynaliadwy sustained event camp hir ei pharhad sustained events camp hir ei pharhad suture asiad (in nature) suture pwyth (in surgery) suture line llinell asio (in nature) suture line llinell bwytho (in surgery) suture lines llinell asio (in nature) suture lines llinell bwytho (in surgery) sutures asiad (in nature) sutures pwyth (in surgery) suzerain penarglwydd suzerains penarglwydd suzerainty penarglwyddiaeth suzerainty agreement cytundeb penarglwyddiaethol suzerainty agreements cytundeb penarglwyddiaethol swab glanhau (=clean wound etc) swab swab swabs swab swage darfath swage darfathu swage block bloc darfath swage blocks bloc darfath swages darfath swale traethbant swales traethbant swallow llyncu swallow dive deif wennol swallow dives deif wennol swallow hole llyncdwll swallow holes llyncdwll swamp gwern swamp forest gwern goedwig swamp forests gwern goedwig swamps gwern swan neck gwyriad ar y grib (on harp) swan neck mynwyddu (on boat) swan necks gwyriad ar y grib (on harp) swan-neck mynwydd (on boat) swan-necked pin pìn gwddf alarch swan-necked pins pìn gwddf alarch swan-necks mynwydd (on boat) swansdown mop mop manblu alarch swansdown mops mop manblu alarch swap cyfnewid swarf naddion swash torddwr swashs torddwr swastika swastica (Nazi symbol) swastika swastika (Hindu symbol) swastikas swastica (Nazi symbol) swastikas swastika (Hindu symbol) swatch casgliad patrymau swatches casgliad patrymau swathe amrwym swathe amrwymo swathes amrwym sweat chwys sweat chwysu (=perspire) sweat cysodro (=soldering) sweat gland chwarren chwys sweat glands chwarren chwys sweats chwys sweatshirt crys chwys sweatshirts crys chwys swede erfinen swedes erfinen sweep ehangylch (of brace) sweep shot ysgubiad sweep shots ysgubiad sweeper ysgubwr sweepers ysgubwr sweeps ehangylch (of brace) sweet container cynhwysydd melysion sweet containers cynhwysydd melysion swell chwyddo (in general) swell ymchwydd (of waves, sowing sections) swell and swale bryn a phant swelling chwydd swellings chwydd swells ymchwydd (of waves, sowing sections) swerve gwyro swimming nofio swimming bladder chwysigen nofio swimming bladders chwysigen nofio swimming gala gala nofio swimming galas gala nofio swimming pool pwll nofio swimming pools pwll nofio swimming stroke dull nofio swimming strokes dull nofio swimsuit gwisg nofio swimsuits gwisg nofio swing gogwydd (in politics) swing mudiad (of winds) swing osgiliad (of movement) swing siglen (=seat slung on ropes) swing siglo (on rope etc) swing swingio (in cricket) swing on a bar swingio ar far swing on a rope siglo ar raff swing the arms backward and forward swingio'r breichiau yn ôl ac ymlaen swings gogwydd (in politics) swings mudiad (of winds) swings osgiliad (of movement) swings siglen (=seat slung on ropes) swirl chwyrlïad swirled pattern patrwm chwyrlïog swirled patterns patrwm chwyrlïog swirling motion mudiant chwyrlïog swirling motions mudiant chwyrlïog swirls chwyrlïad switch switsh switch switsio switch node trosnod switch nodes trosnod switch off diffodd switch on cychwyn (motor etc) switch on cynnau (light, fire) switchboard switsfwrdd switchboards switsfwrdd switches switsh switching algebra algebra switsio switching algebras algebra switsio switching circuit cylched switsio switching circuits cylched switsio swivel bwylltid swivel bwylltidio swivel base gwaelod bwylltid swivel bases gwaelod bwylltid swivel castor castor bwylltid swivel castors castor bwylltid swivel head pen bwylltid swivel heads pen bwylltid swivel joint cymal bwylltid swivel joints cymal bwylltid swivel shoe esgid fwylltid (G cramp) swivel shoes esgid fwylltid (G cramp) swivel vice feis fwylltid swivel vices feis fwylltid swivels bwylltid sword cleddyf sword belt gwregys cleddyf sword belts gwregys cleddyf sword fight gornest gleddyfau sword fights gornest gleddyfau sword shape brush brwsh siâp cleddyf sword shape brushs brwsh siâp cleddyf swords cleddyf sylko edau sglein syllabus maes llafur syloxdex sylocsdecs syloxdexes sylocsdecs symbiosis symbiosis symbol symbol symbolic symbolaidd symbolic address cyfeiriad symbolaidd symbolic character cymeriad symbolaidd symbolic characters cymeriad symbolaidd symbolic play chwarae symbolaidd symbolic thinking meddwl symbolaidd symbolism symbolaeth symbolisms symbolaeth symbolist symbolaidd symbolist movement mudiad symbolaidd symbolist movements mudiad symbolaidd symbolize symboleiddio symbols symbol symmetric cymesur symmetric fold plyg cymesur symmetric folds plyg cymesur symmetrical cymesur symmetrical effect effaith gymesur symmetrical effects effaith gymesur symmetrization cymesuro symmetry cymesuredd sympathetic llawn cydymdeimlad (of person) sympathetic sympathetig (of nervous system) sympathetic strings tannau cydseiniol (acoustics) sympathy cydymdeimlad symphonic symffonig symphonic poem cathl symffonig symphonic poems cathl symffonig symphony symffoni symposium symposiwm symposiums symposiwm symptom symptom symptoms symptom synagogue synagog synagogues synagog synapse synaps synapses synaps synaptic synaptig synchromesh cyd-ddant synchromeshs cyd-ddant synchronization cydamseriad synchronizations cydamseriad synchronize cydamseru synchronizer cydamserydd synchronizers cydamserydd synchronous cydamseredig synchronous counter rhifydd cydamseredig synchronous counters rhifydd cydamseredig synchrotron syncrotron synchrotrons syncrotron synclinal synclinol syncline synclin synclines synclin synclinorium synclinoriwm synclinoriums synclinoriwm syncopation trawsacen syncopations trawsacen syncope llesmair syncopes llesmair syncytium syncytiwm syncytiums syncytiwm syndicalism syndicaliaeth syndicalisms syndicaliaeth syndiotactic syndiotactig syndrome syndrom syndromes syndrom synergism synergedd synergisms synergedd synergist synergydd synergistic synergaidd synergists synergydd synod synod synodal synodaidd synods synod synonym-antonym test prawf cyfystyr-gwrthystyr synonym-antonym tests prawf cyfystyr-gwrthystyr synopsis crynodeb synoptic synoptig synoptic chart siart synoptig synoptic charts siart synoptig synovial synofaidd synovial fluid hylif synofaidd synovial fluids hylif synofaidd synovial joint cymal synofaidd synovial joints cymal synofaidd syntactical cystrawennol syntagm syntagm syntagms syntagm syntax cystrawen syntax analysis dadansoddiad cystrawen syntax error gwall cystrawen syntax errors gwall cystrawen syntax rules rheolau cystrawen syntaxes cystrawen synthesis synthesis synthesize syntheseiddio synthesize information syntheseiddio gwybodaeth synthesizer syntheseiddydd synthesizers syntheseiddydd synthetic synthetig synthetic synthetigyn synthetic adhesive adlyn synthetig synthetic adhesives adlyn synthetig synthetic bass bas synthetig (stop) synthetic cane gwialen synthetig synthetic canes gwialen synthetig synthetic chemist cemegydd synthetig synthetic chemists cemegydd synthetig synthetic detergent glanedydd synthetig synthetic detergents glanedydd synthetig synthetic fibre ffibr synthetig synthetic fibres ffibr synthetig synthetic glue glud synthetig synthetic glues glud synthetig synthetic lacquer lacr synthetig synthetic lacquers lacr synthetig synthetic paint paent synthetig synthetic paints paent synthetig synthetic resin resin synthetig synthetic resin glue glud resin synthetig synthetic resin glues glud resin synthetig synthetic resins resin synthetig synthetic route llwybr synthetig synthetic routes llwybr synthetig synthetic speech llefaru synthetig synthetic track trac synthetig synthetic tracks trac synthetig synthetic wood pren synthetig synthetic woods pren synthetig synthetics synthetigyn syphilis syffilis syringe chwistrell syringe chwistrellu syringe driver gyrrwr chwistrell syringe drivers gyrrwr chwistrell syringes chwistrell syrup syryp syrup form ffurf driog syrup forms ffurf driog syrups syryp syrupy syrypaidd system cyfundrefn (of organization, administration) system system (of body organs, computers, numbers) system maintenance cynnal system system of measurement system fesur system software meddalwedd system system softwares meddalwedd system system specification manyleb system system specifications manyleb system systematic cyfundrefnol (belonging to a system) systematic systematig (=orderly) systematic desensitization dadsensiteiddio systematig systematic error cyfeiliornad systematig systematic errors cyfeiliornad systematig systematic sampling samplu systematig systemic hollgorffol (e.g. of insecticides) systemic arch bwa systemig systemic arches bwa systemig systems cyfundrefn (of organization, administration) systems system (of body organs, computers, numbers) systems analysis dadansoddiad systemau systems analyst dadansoddwr systemau systems analysts dadansoddwr systemau systems and control technology systemau a thechnoleg rheoli systems flowchart siart llif systemau systems flowcharts siart llif systemau systems programmer rhaglennwr systemau systems programmers rhaglennwr systemau systole systole systoles systole tab tab tab key bysell tab tab setting gosodiad tab tab settings gosodiad tab tab washer wasier dafod tab washers wasier dafod tabard tabard tabards tabard tabby loom gwŷdd tabi tabby looms gwŷdd tabi tabernacle tabernacl tabernacles tabernacl table bwrdd (furniture) table seinfwrdd (e.g. on guitar) table tabl (e.g. of numbers / data) table adjustment shaft siafft gymhwyso bwrdd table adjustment shafts siafft gymhwyso bwrdd table easel îsl bwrdd table easels îsl bwrdd table lectern darllenfa fwrdd table lecterns darllenfa fwrdd table mat mat bwrdd table mats mat bwrdd table of logarithms tabl logarithmau table of three tabl tri table steady sadydd bwrdd table top top bwrdd table tops top bwrdd table vice feis fwrdd table vices feis fwrdd table with drawer bwrdd â drôr ynddo table-linen llieiniau bwrdd table-napkin napcyn table-napkins napcyn table-top fixing sicrhau top bwrdd table-top hinge colfach top bwrdd table-top hinges colfach top bwrdd tablecloth lliain bwrdd tablecloths lliain bwrdd tableland tirfwrdd tablelands tirfwrdd tables bwrdd (furniture) tables seinfwrdd (e.g. on guitar) tables tabl (e.g. of numbers / data) tablet tabled tablet loom gwŷdd tabled tablet looms gwŷdd tabled tablet weaving gwehyddu tabled tablets tabled tableware llestri bwrdd tabloid papur poblogaidd tabloids papur poblogaidd taboo tabŵ tabor tabwrdd tabors tabwrdd tabular tablaidd (of data) tabular ice iâ byrddol tabular ices iâ byrddol tabular relief tirwedd fyrddol tabular reliefs tirwedd fyrddol tabulate tablu tabulated tabledig tachism tasiaeth tachisms tasiaeth tachycardia cyflymedd y galon tachycardias cyflymedd y galon tack gludedd (=stickiness) tack hoelen fer (=nail) tack tac (of ship, in sewing) tack tacio tacker taciwr tackers taciwr tacking stitch pwyth tacio tacking stitches pwyth tacio tackle tacl tackle taclau tackle taclo tackler taclwr tacklers taclwr tackles tacl tacks gludedd (=stickiness) tacks hoelen fer (=nail) tacks tac (of ship, in sewing) tacky gludiog tacnode tacnod tacnodes tacnod tactic tacteg tactics tacteg tactile cyffyrddol tactile consciousness ymwybyddiaeth gyffyrddol tactile imagination dychymyg cyffyrddol tactile imaginations dychymyg cyffyrddol tactile sensation synhwyriad cyffyrddol tactile sensations synhwyriad cyffyrddol tadpole penbwl tadpoles penbwl taffeta taffeta taffetas taffeta tag lace carrai tag tag laces carrai tag taiga taiga taigas taiga tail cynffon tailor's canvas cynfas teiliwr tailor's chalk sialc teiliwr tailor's chalks sialc teiliwr tailor's tack tac teiliwr tailor's tacks tac teiliwr tailored suit siwt wedi'i theilwra tailored suits siwt wedi'i theilwra tailoring teilwrio tailpiece cynffon tailpieces cynffon tails cynffon tailstock pen llonydd (lathe) tailstock die holder daliwr dei pen llonydd tailstock die holders daliwr dei pen llonydd tailstocks pen llonydd (lathe) take exercise ymarfer take loose datod take off esgyn (in jumping and vaulting) take part cymryd rhan take the blade cymryd y llafn (prise de fer) take up cydio yn (fugue) take weight on hands cymryd pwysau ar y dwylo take-home pay cyflog clir take-off esgynfa (jumping / vaulting) take-offs esgynfa (jumping / vaulting) take-over trosfeddiannu take-over trosfeddiant take-overs trosfeddiant take-up cymryd i mewn (gas fluid) take-up lever codell (of machine part) take-up levers codell (of machine part) takeaway siop prydau parod taking in slack tynnu slac talc talc talcs talc talented talentog talk show sioe siarad talk shows sioe siarad talking head pen sy'n siarad talking heads pen sy'n siarad tall organisation structre strwythur trefniadaeth tal tall organisation structres strwythur trefniadaeth tal tallage treth ffiwdal tallages treth ffiwdal tallow gwêr tallows gwêr tally rhicbren (of stick) tally mark marc rhifo tally marks marc rhifo talwind talwynt talwinds talwynt tamarind tamarind tamarinds tamarind tambora tambora tamboras tambora tambour tabwrdd tambour de Basque tambwrîn (musical instrument) tambour door drws tabwrdd tambour doors drws tabwrdd tambour frame ffrâm frodio gron (embroidery) tambour frames ffrâm frodio gron (embroidery) tambour front ffrynt tabwrdd tambour fronts ffrynt tabwrdd tambour shutter clawr tabwrdd tambour shutters clawr tabwrdd tambour slat slat dabwrdd tambour slats slat dabwrdd tambourin tambwrîn (type of music or dance) tambourine tambwrîn (musical instrument) tambourines tambwrîn (musical instrument) tambourins tambwrîn (type of music or dance) tambours tabwrdd tan barcio (leather) tandem corrie peiran tandem tandem corries peiran tandem tang colsaid (of chisel, file) tangency tangiadaeth tangent tangiad tangent plane plân tangiad tangent planes plân tangiad tangential tangiadol tangential arc arc dangiadol tangential arcs arc dangiadol tangential follower dilynwr tangiadol tangential followers dilynwr tangiadol tangential plane plân tangiadol tangential planes plân tangiadol tangential sawcut tanglifiad tangential sawcuts tanglifiad tangential sawing llifio tangiadol tangential section trychiad tangiadol tangential sections trychiad tangiadol tangents tangiad tango tango tangram tangram tangrams tangram tangs colsaid (of chisel, file) tanh tanh tanha tanha tanhas tanha tanhs tanh tank tanc tank cutter torrwr tanc tank cutters torrwr tanc tank drill dril tanc tank drills dril tanc tanker tancer tankers tancer tanks tanc tanner barcer (of leather) tanners barcer (of leather) tannery tanerdy tannic acid asid tannig tannic acids asid tannig tannin tanin tannins tanin tantalum tantalwm (Ta) tantalums tantalwm (Ta) tantrum stranc tantrums stranc tap tap tap tapio tap dancing dawnsio tap tap root prif wreiddyn tap roots prif wreiddyn tap wrench tyndro tap tap wrenches tyndro tap tape tâp tape deck dec tâp tape decks dec tâp tape drive tâp-yrrwr tape drives tâp-yrrwr tape feed tâp-borthi tape feed tâp-borthydd tape feeds tâp-borthydd tape file ffeil tâp tape files ffeil tâp tape library llyfrgell dapiau tape mark marc tâp tape marks marc tâp tape punch tyllydd tâp tape punches tyllydd tâp tape reader darllenydd tâp tape readers darllenydd tâp tape sequence dilyniant tâp tape sequences dilyniant tâp tape serial number rhif cyfresol tâp tape serial numbers rhif cyfresol tâp tape transport cludydd tâp tape transports cludydd tâp tape unit uned tâp tape units uned tâp tape-measure tâp mesur tape-measures tâp mesur taped music cerddoriaeth dâp taped musics cerddoriaeth dâp taper tapr taper tapro taper drift drifft tapr taper drifts drifft tapr taper lead arweiniad tapr taper leads arweiniad tapr taper pin pìn tapr taper pins pìn tapr taper reamer agorell dapr taper reamers agorell dapr taper shank garan dapr taper shank drill dril garan dapr taper shank drills dril garan dapr taper shanks garan dapr taper sleeve llawes dapr taper sleeves llawes dapr taper tap tap tapr taper taps tap tapr taper turning turnio tapr taper turning attachment atodyn turnio tapr taper turning attachments atodyn turnio tapr tapered taprog tapered former ffurfydd taprog tapered formers ffurfydd taprog tapered gutter cafn taprog tapered gutters cafn taprog tapered handle coes daprog tapered handles coes daprog tapered housing joint uniad rhigol draws daprog tapered housing joints uniad rhigol draws daprog tapered key allwedd daprog tapered leg coes daprog tapered legs coes daprog tapered part rhan daprog tapered parts rhan daprog tapered shaft siafft daprog tapered shafts siafft daprog tapered stake bonyn taprog tapered stakes bonyn taprog tapered tread gris taprog tapered treads gris taprog tapered trowel trywel taprog tapered trowels trywel taprog tapering blaenfain tapering pigfain tapering fold plyg pigfain tapering folds plyg pigfain tapers tapr tapes tâp tapestry tapestri tapestry needle nodwydd tapestri tapestry needles nodwydd tapestri tapestry wool edafedd tapestri tapetum tapetwm tapetums tapetwm tapeworm llyngyren tapeworms llyngyren tapped hole twll wedi'i dapio tapped holes twll wedi'i dapio tappet taped tappet clearance cliriad taped tappet clearances cliriad taped tappets taped tapping drill dril tapio tapping drills dril tapio tapping hole twll tapio tapping holes twll tapio taps and dies tapiau a deiau tarantella tarantela tarantellas tarantela target targed target audience cynulleidfa darged target audiences cynulleidfa darged target criteria meini prawf targed target game gêm darged target games gêm darged target group grŵp targed target groups grŵp targed target language iaith darged target languages iaith darged target organ cyrch-organ target organs cyrch-organ targeted programme rhaglen a dargedwyd targeted programmes rhaglen a dargedwyd targets targed tariff toll (=tax) tariff wall mur tollau tariff walls mur tollau tariffs toll (=tax) tarmac tarmac tarmacs tarmac tarn llyn mynydd tarnish tarnais tarnish tarneisio tarnishs tarnais tarns llyn mynydd tarsal tarsol tarsus tarsws tartaric acid asid tartarig tartaric acids asid tartarig task tasg task force cyrchlu task forces cyrchlu task orientated care gofal yn ôl tasgau task orientated cares gofal yn ôl tasgau tasks tasg tassel tasel tassels tasel taste blas (of food etc) taste blasu taste chwaeth (=discernment) taste bud blasbwynt taste buds blasbwynt tastes blas (of food etc) tastes chwaeth (=discernment) tatting tatio tattoo tatŵ taurine tawrin taurines tawrin taurocholic acid asid tawrocolig taurocholic acids asid tawrocolig taut tynn tautology tawtoleg tautomeric tawtomerig tautomerism tawtomeredd tautomerisms tawtomeredd tawhid tawhid tawhids tawhid tax treth tax trethu tax allowance lwfans trethi tax allowances lwfans trethi tax exemption eithriad o dreth tax exemptions eithriad o dreth tax gatherer casglwr trethi tax gatherers casglwr trethi tax rebate ad-daliad treth tax rebates ad-daliad treth tax relief gostyngiad yn y dreth tax reliefs gostyngiad yn y dreth taxable trethadwy taxable income incwm trethadwy taxable incomes incwm trethadwy taxation trethiad taxation rates cyfraddau trethiad taxations trethiad taxi tacsi taxis tacsi taxonomic tacsonomaidd taxonomy tacsonomeg tca cycle cylched tca tca cycles cylched tca tea break amser paned tea breaks amser paned tea cosy gorchudd tebot teach addysgu teacher athrawes (female) teacher athro (male) teacher assessment asesiad yr athrawes (when the teacher is the assessor - of female teacher) teacher assessment asesiad yr athro (when the teacher is the assessor - of male teacher) teacher assessment asesu athrawon (when the teacher is assessed) teacher assessments asesiad yr athrawes (when the teacher is the assessor - of female teacher) teacher assessments asesiad yr athro (when the teacher is the assessor - of male teacher) teacher centre canolfan athrawon teacher centres canolfan athrawon teacher education addysg athrawon teacher educations addysg athrawon teacher placement service gwasanaeth lleoli athrawon teacher placement services gwasanaeth lleoli athrawon teacher support programme rhaglen cefnogi athrawon teacher support programmes rhaglen cefnogi athrawon teacher training hyfforddi athrawon teachers athrawes (female) teachers athro (male) teaching dysgeidiaeth teaching hospital ysbyty athrofaol teaching hospitals ysbyty athrofaol teaching load baich dysgu teaching loads baich dysgu teaching materials deunyddiau addysgu teaching methods dulliau addysgu teaching practice ymarfer dysgu teaching practices ymarfer dysgu teaching style arddull addysgu teaching styles arddull addysgu teaching unit uned ddysgu teaching units uned ddysgu teachings dysgeidiaeth teak tîc teak oil olew tîc teak oils olew tîc teaks tîc team tîm team event camp tîm team events camp tîm team game gêm i dîm team games gêm i dîm team leader arweinydd tîm team leaders arweinydd tîm team member aelod o dîm team members aelod o dîm team nursing nyrsio tîm team teaching addysgu tîm teams tîm teamwork gwaith tîm teamworks gwaith tîm tear deigryn (drop of liquid) tear rhwyg (hole or damage) tear rhwygo (pull apart) tear duct dwythell ddagrau tear ducts dwythell ddagrau tear-off roll rholen rwygo tear-off rolls rholen rwygo tears deigryn (drop of liquid) tears rhwyg (hole or damage) tease cribo gwlân (wool) teaser cribwr (of wool) teaser campaign ymgyrch ragflas teaser campaigns ymgyrch ragflas teasers cribwr (of wool) teat teth teat pipette diferydd teat pipettes diferydd teats teth technetium technetiwm (Tc) technetiums technetiwm (Tc) technical technegol technical code cod technegol technical codes cod technegol technical college coleg technegol technical colleges coleg technegol technical designer cynllunydd technegol technical designers cynllunydd technegol technical drawing lluniad technegol technical drawings lluniad technegol technical education addysg dechnegol technical educations addysg dechnegol technical production skill sgìl cynhyrchu technegol technical production skills sgìl cynhyrchu technegol technical staff staff technegol technician technegydd technicians technegydd technique techneg techniques techneg technological technolegol technological change newid technolegol technological changes newid technolegol technologist technolegydd technologists technolegydd technology technoleg technology push gwthiad technoleg technology pushs gwthiad technoleg tectonic tectonig tectonic activity gweithgaredd tectonig tectonic event digwyddiad tectonig tectonic events digwyddiad tectonig tectonic hazard perygl tectonig tectonic hazards perygl tectonig tectonic plate movement symudiad platiau tectonig tectonic plate movements symudiad platiau tectonig tectonic process proses dectonig tectorial membrane pilen dectoraidd tectorial membranes pilen dectoraidd tee ti tee tio tee bolt bollt T tee bolts bollt T tee bridle bagl T tee bridle joint uniad bagl T tee bridle joints uniad bagl T tee bridles bagl T tee halving haneru T tee-slot milling cutter melinwr rhigol T tee-slot milling cutters melinwr rhigol T teenage magazine cylchgrawn ar gyfer yr arddegau teenage magazines cylchgrawn ar gyfer yr arddegau teens arddegau teething torri dannedd teething-ring cylch cnoi teething-rings cylch cnoi teetotaller llwyrymwrthodwr teetotallers llwyrymwrthodwr telecommunication telathrebu teleological teleolegol teleological argument dadl deleolegol teleological arguments dadl deleolegol teleology teleoleg telephone ffôn telephone banking bancio ffôn telephone survey arolwg ffôn telephones ffôn teleprinter tele-argraffydd teleprinters tele-argraffydd telescope telesgop telescopes telesgop teletext teledestun teletexts teledestun teletype teledeip teletypes teledeip television teledu television documentary rhaglen ddogfen teledu television drama drama deledu television dramas drama deledu television programme rhaglen deledu television programmes rhaglen deledu television set set deledu television sets set deledu television technique techneg deledu television techniques techneg deledu televisions teledu tellurium telwriwm (Te) telluriums telwriwm (Te) telophase teloffas telophases teloffas temper ardymheru (a musical instrument) temper tymer tempera tempera tempera colour lliw tempera tempera colours lliw tempera tempera painting paentiad tempera (of painted picture) tempera painting peintio tempera (of process or art) tempera paintings paentiad tempera (of painted picture) temperament anianawd (of character) temperament ardymer (in music) temperaments anianawd (of character) temperaments ardymer (in music) temperance movement mudiad dirwest temperance movements mudiad dirwest temperas tempera temperate tymherus temperate forest coedwig dymherus temperate forests coedwig dymherus temperate grassland glaswelltir tymherus temperate grasslands glaswelltir tymherus temperate zone cylchfa dymherus temperate zones cylchfa dymherus temperature tymheredd temperature coefficient of resistance cyfernod tymheredd gwrthiant temperature colour guide cyfarwyddyd lliwiau tymheredd temperature colour guides cyfarwyddyd lliwiau tymheredd temperature range amrediad tymheredd temperature ranges amrediad tymheredd temperature scale graddfa tymheredd temperature scales graddfa tymheredd temperatures tymheredd tempering tymheru tempering colours lliwiau tymheru tempers tymer template patrymlun (pattern in wood etc) template templed (in computing) templates patrymlun (pattern in wood etc) templates templed (in computing) temple teml temples teml tempo tempo tempo marking arwydd tempo tempo markings arwydd tempo temporal tymhorol (=secular) temporal data data amseryddol temporal lobe llabed yr arlais temporal lobes llabed yr arlais temporal power pŵer tymhorol temporal powers pŵer tymhorol temporary dros dro ten point scale graddfa deg pwynt ten point scales graddfa deg pwynt tenancy tenantiaeth tenant tenant tenant farmer tenant fferm tenant farmers tenant fferm tenant-at-will tenant wrth ewyllys tenant-at-wills tenant wrth ewyllys tenant-in-chief prif denant tenant-in-chiefs prif denant tenantry tenantiaid tenants tenant tendency tuedd tender tendr tender tyner tenderness tynerwch (emotion) tenders tendr tendon tendon tendons tendon tendons of origin and insertion tendonau tarddol a thendonau mewniad tendril tendril tendrils tendril tenement tenement tenements tenement tennis tennis tennis ball pêl dennis tennis balls pêl dennis tennis shoe esgid dennis tennis shoes esgid dennis tenon tyno tenon saw llif dyno tenon saws llif dyno tenoned clamp clamp tyno tenoned clamps clamp tyno tenons tyno tenor tenor tenor horn corn tenor tenor horns corn tenor tenor stave erwydd tenor tenor staves erwydd tenor tenor viol feiol denor tenor viols feiol denor tenors tenor tens and units degau ac unedau tensile tynnol tensile bolt bollt tynnol tensile bolts bollt tynnol tensile force grym tynnol tensile forces grym tynnol tensile strain straen tynnol tensile strains straen tynnol tensile strength cryfder tynnol tensile strengths cryfder tynnol tensile stress diriant tynnol tension tyndra (of muscles, nerves etc) tension tyniant (mechanical) tension bar bar tyniant tension bars bar tyniant tension bolt bollt tyniant tension bolts bollt tyniant tension disc disg tyniant (machine part) tension discs disg tyniant (machine part) tension force grym tyniant tension forces grym tyniant tension spring sbring tyniant tension springs sbring tyniant tension stress diriant tyniant tensioner tyniannwr tensioners tyniannwr tensions tyndra (of muscles, nerves etc) tensions tyniant (mechanical) tensor tensor tensors tensor tent pabell tent stitch pwyth pabell tent stitches pwyth pabell tentacle tentacl tentacles tentacl tenter frame ffrâm ddeintur tenter frames ffrâm ddeintur tenter hook bach deintur tenter hooks bach deintur tenth degfed tenths degfed tents pabell tenure daliadaeth tenures daliadaeth tepid claear tepid sponging sbwngio â dŵr claear terabyte terabeit terabytes terabeit terazzo terazzo terbium terbiwm (Tb) terbiums terbiwm (Tb) terce awr anterth terces awr anterth tercimal triol tercimal triolyn tercimal point pwynt triol tercimal points pwynt triol tercimals triolyn term term (in language) term tymor (=period of time) term assurance aswiriant cyfnod term assurances aswiriant cyfnod terminal pen tymor (=end of term) terminal terfynell (e.g. computer terminal) terminal terfynol (=final) terminal tymhorol (=every term) terminal bud penflaguryn terminal buds penflaguryn terminal illness afiechyd marwol terminal mode modd terfynell terminal modes modd terfynell terminal moraine marian terfynol terminal moraines marian terfynol terminal oxidase ocsidas terfynol terminal oxidases ocsidas terfynol terminalization terfyneiddiad terminalizations terfyneiddiad terminals terfynell (e.g. computer terminal) terminate terfynu terminating terfynus termination reaction adwaith terfynu termination reactions adwaith terfynu terms telerau (=conditions) terms term (in language) terms tymor (=period of time) terms of reference cylch gorchwyl terms of trade telerau masnach ternary triaidd ternary number rhif triaidd ternary numbers rhif triaidd terne plate plât tern terne plates plât tern terra cotta terra cotta terra cottas terra cotta terrace rhes (relief feature) terrace teras (on a slope) terrace terasu terrace house tŷ rhes terrace houses tŷ rhes terraced house tŷ teras terraced houses tŷ teras terraces rhes (relief feature) terraces teras (on a slope) terracette teraset terracettes teraset terracing cerlan (topographical) terracings cerlan (topographical) terrain tir terrains tir terrestrial daearol terrestrial magnetism magnetedd daear terrestrial magnetisms magnetedd daear terrestrial television teledu daearol terrestrial televisions teledu daearol terret ring cylch genfa terret rings cylch genfa terrier tirlyfr (book) terriers tirlyfr (book) territorial tiriogaethol territorial army byddin diriogaethol territorial expansion ehangiad tiriogaethol territorial expansions ehangiad tiriogaethol territorial integrity tiriogaeth gydnabyddedig territorial waters dyfroedd tiriogaethol territory tiriogaeth terrorism terfysgaeth terrorisms terfysgaeth terrorist terfysgwr terrorists terfysgwr terrorize brawychu (=frighten) terrorize terfysgu (=use terrorism) tertiary trydyddol tertiary health care gofal iechyd trydyddol tertiary health cares gofal iechyd trydyddol tertiary sector sector trydyddol tertiary sectors sector trydyddol terylene gauze rhwyllen derylen terylene gauzes rhwyllen derylen tessellation brithwaith tessellations brithwaith test prawf test profi (in general) test data prawf-ddata test development manager rheolwr datblygu profion test development managers rheolwr datblygu profion test game gêm brawf test games gêm brawf test marketing prawf-farchnata test of significance prawf arwyddocâd test paper papur prawf test papers papur prawf test pilot peilot profi test pilots peilot profi test run rhediad arbrofol test runs rhediad arbrofol test transmission trawsyriant prawf test transmissions trawsyriant prawf test-tube tiwb profi test-tube rack rhesel tiwbiau profi test-tube racks rhesel tiwbiau profi test-tubes tiwb profi testa hadgroen testaceous cragennaidd testament testament testaments testament testas hadgroen testee profedigai testees profedigai testicles ceilliau testicular self-examination hunanarchwiliad o'r ceilliau testicular self-examinations hunanarchwiliad o'r ceilliau testimonial tysteb testimonials tysteb testing procedure dull gweithredu i brofi testing procedures dull gweithredu i brofi testing protocols protocolau profi testing question cwestiwn profi testing questions cwestiwn profi testing strategy strategaeth brofi testis caill testosterone testosteron testosterones testosteron tests prawf tetanus tetanws tetany tetanedd tetrachloromethane tetracloromethan tetrachloromethanes tetracloromethan tetrachord tetracord tetrachords tetracord tetracyclic pedwarcylchol tetrahedral tetrahedrol tetrahedron tetrahedron tetrahedrons tetrahedron tetrode tetrod tetrodes tetrod tetromino tetromino text testun text compression techniques dulliau cywasgu testun text editor golygydd testun text editors golygydd testun text processing gairbrosesu text screen sgrin destun text screens sgrin destun text-to-speech synthesizer syntheseiddydd llefaru testun text-to-speech synthesizers syntheseiddydd llefaru testun textbook gwerslyfr textbooks gwerslyfr textile tecstil textile colour lliw tecstil textile colours lliw tecstil textile industry diwydiant tecstilau textiles tecstil textiles and surface pattern tecstilau a phatrwm ar yr wyneb texts testun textual testunol textual analysis dadansoddiad testunol textural gweadeddol texture gwead texture gwedd (of wood) texture rubbing ffrotais gwead texture rubbings ffrotais gwead textured material defnydd gweadog textured materials defnydd gweadog textured surface arwyneb gweadog textured surfaces arwyneb gweadog textured thread edau weadog textured threads edau weadog textured yarn edafedd gweadog textures gwead textures gwedd (of wood) texturing gweadeddu textwrap lapio testun thallium thaliwm (Tl) thalliums thaliwm (Tl) thallus thalws thane brëyr thanes brëyr thatched roof to gwellt thatched roofs to gwellt thaw dadmer theatre theatr theatre design dylunio ar gyfer y theatr theatre gown gŵn theatr theatre gowns gŵn theatr theatre music cerddoriaeth theatr theatre musics cerddoriaeth theatr theatre practitioners ymarferwyr theatr theatres theatr theatrical theatraidd theatrical convention confensiwn theatrig theatrical conventions confensiwn theatrig theatrical production cynhyrchiad theatraidd theatrical productions cynhyrchiad theatraidd theism theistiaeth theisms theistiaeth thematic approach dull thematig thematic approaches dull thematig thematic element elfen thematig thematic elements elfen thematig thematic extension study astudiaeth estyn thematig thematic work gwaith thematig thematic works gwaith thematig theme thema theme and variations thema ac amrywiadau theme park parc thema theme parks parc thema themes thema theocracy theocratiaeth theodicy theodiciaeth theodolite theodolit theodolites theodolit theology diwinyddiaeth theorbo theorbo theorem theorem theorems theorem theoretical damcaniaethol theorize damcaniaethu theory damcaniaeth (of individual examples) theory theori (=exposition of the principles of a science) theory of development damcaniaeth datblygiad theory of evolution damcaniaeth esblygiad theory of games theori gemau theory of mind theori o feddwl theory of music theori cerddoriaeth theory of relativity damcaniaeth perthnasedd therapeutic therapiwtig therapeutic play chwarae therapiwtig therapist therapydd therapists therapydd therapy therapi therefore felly therm therm thermal thermol thermal conductivity dargludedd thermol thermal decomposition dadelfennu thermol thermal dissociation daduniad thermol thermal dissociations daduniad thermol thermal energy egni thermol thermal equator cyhydedd thermol thermal equators cyhydedd thermol thermal equilibrium cydbwysedd thermol thermal equilibriums cydbwysedd thermol thermal insulation ynysiad thermol thermal insulations ynysiad thermol thermal insulator ynysydd thermol thermal insulators ynysydd thermol thermionic thermionig thermionic valve falf thermionig thermionic valves falf thermionig thermistor thermistor thermistors thermistor thermit reaction adwaith thermit thermit reactions adwaith thermit thermo forming thermoffurfio thermo-dummy teth dymheredd thermo-hardening adhesive adlyn thermo-galedu thermo-hardening adhesives adlyn thermo-galedu thermocline thermoclein thermoclines thermoclein thermocouple thermocwpl thermocouple pyrometer pyromedr thermocwpl thermocouple pyrometers pyromedr thermocwpl thermocouples thermocwpl thermodynamic thermodynamig thermodynamics thermodynameg thermoelectric thermodrydanol thermoelectricity thermodrydan thermogram thermogram thermograms thermogram thermojunction thermogydiad thermojunctions thermogydiad thermometer thermomedr thermometers thermomedr thermometric thermometrig thermometric titration titradiad thermometrig thermometric titrations titradiad thermometrig thermometry thermometreg thermopile thermopil thermopiles thermopil thermoplastic thermoplastig thermoplastics thermoplastig thermoscope thermosgop thermoscopes thermosgop thermosetting thermosodol thermosetting plastic plastig thermosodol thermosetting plastics plastig thermosodol thermostat thermostat thermostatic control rheolaeth thermostatig thermostatic controls rheolaeth thermostatig thermostats thermostat therms therm thesaurus thesawrws thesis thesis (=proposition, argument) thesis traethawd (=dissertation) thesis traethawd ymchwil (=research essay) thiamine thiamin thiamines thiamin thick tew (of thread, rope etc) thick trwchus (of liquids, materials) thick flank ystlys dew thick flanks ystlys dew thick line llinell dew thick lines llinell dew thick plate glass platwydr trwchus thicken tewychu thickener tewychydd thickeners tewychydd thicket dryslwyn thickets dryslwyn thickly populated country gwlad boblog iawn thickness trwch thicknessing attachment atodyn tewychu thicknessing attachments atodyn tewychu thicknessing machine peiriant tewychu thicknessing machines peiriant tewychu thief vault llofnaid lleidr thief vaults llofnaid lleidr thigh morddwyd thighs morddwyd thimble gwniadur thimbles gwniadur thin tenau thin card disk disg cerdyn tenau thin card disks disg cerdyn tenau thin chain line llinell gadwyn denau thin chain lines llinell gadwyn denau thin flank ystlys denau thin flanks ystlys denau thin line llinell denau thin lines llinell denau thin metal metel tenau thin metals metel tenau thin place darn craith man gwan thin place darns craith man gwan thin-layer chromatography cromatograffaeth haen-denau thinly populated country gwlad denau ei phoblogaeth thinner teneuydd thinners teneuydd thinning medium cyfrwng teneuo thinning mediums cyfrwng teneuo third traean (fraction =one third) third trydydd (ordinal number) third angle projection tafluniad trydedd ongl third angle projections tafluniad trydedd ongl third degree equation hafaliad gradd tri third degree equations hafaliad gradd tri third inversion trydydd gwrthdro third inversions trydydd gwrthdro third man trydydd (sport) third mans trydydd (sport) third order gradd tri third order reaction adwaith gradd tri third order reactions adwaith gradd tri third orders gradd tri third party insurance yswiriant trydydd person third party insurances yswiriant trydydd person third person trydydd person third persons trydydd person thirds traean (fraction =one third) thirds trydydd (ordinal number) thirsty sychedig thirteenth trydydd ar ddeg thirteenths trydydd ar ddeg thistle funnel twndis ysgall thistle funnels twndis ysgall thixotropic thicsotropig thong carrai thongs carrai thoracic thorasig thorax thoracs thoraxes thoracs thorium thoriwm (Th) thoriums thoriwm (Th) thorn forest coedwig ddrain thorn forests coedwig ddrain thorough trylwyr thorough bass continuo thorough cleaning glanhau trylwyr thoroughfare tramwyfa thoroughfares tramwyfa thousand mil thousands mil thousandth milfed thousandths milfed thrashing machine peiriant dyrnu thrashing machines peiriant dyrnu thread edafu thread edau (of yarn, screw etc) thread trywydd (of argument, discussion etc) thread angle gauge medrydd ongl edau thread angle gauges medrydd ongl edau thread cell edeugell thread cells edeugell thread chaser siaswr edafedd thread chasers siaswr edafedd thread cutter torrwr edau (of machine part) thread cutters torrwr edau (of machine part) thread cutting torri edau (of lathe tools) thread guide bachyn tywys edau (of machine part) thread guides bachyn tywys edau (of machine part) thread hole twll edau thread holes twll edau thread parts rhannau edau thread pitch pitsh edau thread pitch gauge medrydd pitsh edau thread pitch gauges medrydd pitsh edau thread pitches pitsh edau thread-cutting screw sgriw torri edau thread-cutting screws sgriw torri edau thread-forming screw sgriw ffurfio edau thread-forming screws sgriw ffurfio edau threaded hole twll ag edau ynddo threaded holes twll ag edau ynddo threader edefydd (machine attachments) threaders edefydd (machine attachments) threading hook bach edafu threading hooks bach edafu threads edau (of yarn, screw etc) threads trywydd (of argument, discussion etc) three arm stake bonyn teirbraich three arm stakes bonyn teirbraich three dimensional design dylunio tri dimensiwn three outs tri allan three point plug plwg tri phìn three point plugs plwg tri phìn three quarters tri chwarter (fraction) three second rule rheol tair eiliad three second rules rheol tair eiliad three-digit tri-digid three-dimensional tri dimensiwn three-dimensional construction adeiladwaith tri dimensiwn three-dimensional constructions adeiladwaith tri dimensiwn three-dimensional modelling modelu tri dimensiwn three-division saucer soser deir-ran three-division saucers soser deir-ran three-field system trefn drimaes three-field systems trefn drimaes three-handed reel ril deirllaw three-handed reels ril deirllaw three-jaw chuck crafanc tair safn three-jaw chucks crafanc tair safn three-line banding bandin tair llinell three-line bandings bandin tair llinell three-ply wood pren tairhaenog three-ply woods pren tairhaenog three-ply wool edafedd tair cainc three-quarter trichwarterwr (in rugby) three-quarters trichwarterwr (in rugby) three-sided stitch pwyth triongl three-sided stitches pwyth triongl three-square tairongl three-square file ffeil dairongl three-square files ffeil dairongl three-stage reaction adwaith tri cham three-stage reactions adwaith tri cham three-way tap tap teirffordd three-way taps tap teirffordd threesome triawd threesomes triawd threshold trothwy threshold energy egni trothwy threshold frequency amledd trothwy thresholds trothwy thrift clustog Fair (=sea pink) thrifts clustog Fair (=sea pink) thro' ball pàs hollti thro' balls pàs hollti throat gwddf throat plate plât bobin (of machine part) throat plates plât bobin (of machine part) throating gwrthyrrwr dŵr (window) throatings gwrthyrrwr dŵr (window) throats gwddf throb curo thrombocyte thrombocyt thrombocytes thrombocyt thrombosis thrombosis thrombus thrombws throne gorsedd thrones gorsedd throttle sbardun throttle tagu throttles sbardun through chamfer siamffer trwodd through chamfers siamffer trwodd through dovetail housing joint uniad rhigol draws gynffonnog trwodd through dovetail housing joints uniad rhigol draws gynffonnog trwodd through dovetail joint uniad cynffonnog trwodd through dovetail joints uniad cynffonnog trwodd through housing rhigol trwodd through housing joint uniad rhigol draws trwodd through housing joints uniad rhigol draws trwodd through housings rhigol trwodd through mortise and tenon joint uniad mortais a thyno trwodd through mortise and tenon joints uniad mortais a thyno trwodd through sawcut llifiad trwodd through sawcuts llifiad trwodd through tenon tyno trwodd through tenons tyno trwodd through traffic trafnidiaeth drwodd through traffics trafnidiaeth drwodd through vault llofnaid fwlch through vault with double beat llofnaid fwlch ddeuglap through vaults llofnaid fwlch throughput trwybwn throughputs trwybwn throw tafliad throw taflu throw down the wicket torri'r wiced throw forward taflu ymlaen throw in taflu i mewn throw-up cydnaid (jump) throw-ups cydnaid (jump) thrower taflwr throwers taflwr throwing the discus taflu'r ddisgen throwing the hammer taflu'r ordd throwing the javelin taflu'r waywffon thrown shape siâp a daflwyd thrown shapes siâp a daflwyd throws tafliad thrum tynnu thrush llindag (throat infection) thrushs llindag (throat infection) thrust gwaniad (of sword) thrust gwanu (of sword) thrust gwthiad (=push) thrust gwthio (=push) thrust bearing gwthferyn thrust bearings gwthferyn thrust cap cap gwthio thrust caps cap gwthio thrust direction cyfeiriad gwthiad thrust directions cyfeiriad gwthiad thrusts gwaniad (of sword) thrusts gwthiad (=push) thulium thwliwm (Tm) thuliums thwliwm (Tm) thumb bawd thumb gauge medrydd bawd thumb gauges medrydd bawd thumb latch clicied fawd thumb latches clicied fawd thumb piston piston bawd thumb pistons piston bawd thumb position safle'r bawd thumb positions safle'r bawd thumbnail sketch braslun bawd thumbnail sketches braslun bawd thumbs bawd thumbscrew sgriw fawd thumbscrews sgriw fawd thunder taran thunder machine peiriant taranau thunder machines peiriant taranau thunder shake hollt taran thunder shakes hollt taran thunderbolt taranfollt thunderbolts taranfollt thunders taran thunderstorm storm fellt a tharanau thunderstorms storm fellt a tharanau thus felly thwart sedd ystlys (=boat seat) thwarts sedd ystlys (=boat seat) thymus thymws thyristor thyristor thyristors thyristor thyroglobulin thyroglobwlin thyroid thyroid thyroid gland chwarren thyroid thyroid glands chwarren thyroid thyroids thyroid thyroxin thyrocsin thyroxins thyrocsin tibia tibia tibias tibia tic gwingiad ticker tape tâp ticio ticker tapes tâp ticio ticker timer amserydd ticio ticker timers amserydd ticio ticket tocyn ticket board bwrdd tocynnau ticket boards bwrdd tocynnau tickets tocyn tidal air aer cyfnewid (of respiration) tidal airs aer cyfnewid (of respiration) tidal bore eger llanw tidal bores eger llanw tidal current cerrynt llanw tidal currents cerrynt llanw tidal datum seilnod llanw tidal datums seilnod llanw tidal energy egni llanw tidal flat fflat llanw tidal flats fflat llanw tidal lagoon morlyn llanw tidal lagoons morlyn llanw tidal range amrediad llanw tidal ranges amrediad llanw tidal scour sgwrfa llanw tidal scours sgwrfa llanw tidal volume cyfaint cyfnewid (of respiration) tidal volumes cyfaint cyfnewid (of respiration) tidal wave ton llanw tidal waves ton llanw tide llanw tide race eger tide races eger tides llanw tie clymu tie cwlwm (a knot or attachment etc) tie gêm gyfartal (=drawn game) tie tei (article of clothing) tie and dye clymu a llifo tie-beam tynlath tie-beams tynlath tie-break torri'r ddadl (in tennis) tie-line clymlin tie-lines clymlin tie-off screw sgriw gwlwm tie-off screws sgriw gwlwm tied clwm tied cottage bwthyn clwm tied cottages bwthyn clwm tied fret cribell glwm tied frets cribell glwm tied house tŷ clwm tied houses tŷ clwm tied note nodyn clwm tied notes nodyn clwm tier haen (=layer) tier rhenc (of seats etc) tier rhes (=row) tierce de Picardie tierce de Picardie tiered skirt sgert renciog tiered skirts sgert renciog tierra caliente tir poeth tierra calientes tir poeth tierra fria tir oer tierra frias tir oer tierra templada tir tymherus tierra templadas tir tymherus tiers haen (=layer) tiers rhenc (of seats etc) tiers rhes (=row) tierspoint arch bwa tiersbwynt tierspoint arches bwa tiersbwynt tight tynn tight fit ffit dynn tight fits ffit dynn tight head pen tynn (in rugby) tight heads pen tynn (in rugby) tighten tynhau tightening loop dolen dynhau tightening loops dolen dynhau tightness tyndra tile teilsen tile cement sment teils tile cements sment teils tiles teilsen till til (glacial) till trin (land) tiller llyw (of boat) tillering tileru tillers llyw (of boat) tillite tilfaen tillites tilfaen tills til (glacial) tilt gogwydd (slope or inclination) tilt gogwyddo (slope or incline) tilted ar ogwydd tilth tir rhywiog tilths tir rhywiog tilts gogwydd (slope or inclination) timber coed timber conversion trosiad coed timber conversions trosiad coed timber defects diffygion coed timber framing fframwaith coed timber framings fframwaith coed timber preservation cadwraeth coed timber preservations cadwraeth coed timber stacking tasu coed timbers coed timbre ansawdd (=quality) timbres ansawdd (=quality) time amser (in general) time amseru time cyfnod (=period) time average cyfartaledd amser time averages cyfartaledd amser time constant cysonyn amser time constants cysonyn amser time delay oediad amser time division multiplexing amlblethu rhaniadau amser time keeper amserwr time keepers amserwr time lag oediad amser time lags oediad amser time of arrival amser cyrraedd time of flight amser hedfan time off saib (time out) time offs saib (time out) time out saib time outs saib time sheet taflen amser time sheets taflen amser time slice tafell amser time slices tafell amser time taken amser a gymerwyd time takens amser a gymerwyd time zone cylchfa amser time zones cylchfa amser time-base amserlin time-bases amserlin time-line programme rhaglen llinell-amser time-line programmes rhaglen llinell-amser time-scale graddfa amser time-scales graddfa amser time-sharing cydrannu amser (computing) timer amserydd timers amserydd times amser (in general) times cyfnod (=period) timetable amserlen timetable amserlennu timetables amserlen timing amseriad (=tempo) timings amseriad (=tempo) tin tun (Sn) tin tun (of container) tin tunio tinctorial trwythol tincture trwyth tinctures trwyth tinder box blwch tân tinder boxes blwch tân tinge gwawr tinges gwawr tinned food bwyd tun tinned foods bwyd tun tinplate tunplat tinplates tunplat tinsel tinsel tinsels tinsel tinsnips snipiwr tun tint arlliw tint arlliwio tinted arlliwedig tinted paper papur arlliwedig tinted papers papur arlliwedig tints arlliw tints arlliwio tip blaen (extremity or end) tip cildwrn (money) tip tipio tip tomen (of rubbish etc) tip treiddiwr (=penetrator) tirando tirando tiredness blinder tissue meinwe (in animals, plants) tissue culture meithriniad meinwe tissue cultures meithriniad meinwe tissue fluid hylif meinweol tissue fluids hylif meinweol tissue paper papur sidan tissue papers papur sidan tissues meinwe (in animals, plants) titanium titaniwm (Ti) titanium white gwyn titaniwm titanium whites gwyn titaniwm titaniums titaniwm (Ti) tithe degwm tithe barn ysgubor ddegwm tithe barns ysgubor ddegwm tithes degwm tithing degymiad tithings degymiad title hawl (to land etc) title teitl title block bloc teitl title blocks bloc teitl title page wynebddalen title pages wynebddalen title screen sgrin agoriadol title screens sgrin agoriadol titles hawl (to land etc) titles teitl titrate titradu titre titr titres titr titrimetric titradaethol titrimetry titradaeth to a scale of 11 wrth raddfa 11 to a suitable scale wrth raddfa addas toaster tostiwr toasters tostiwr tobacco tybaco toccata tocata toccatas tocata toddler plentyn bach toddlers plentyn bach toddlers' wear dillad plant bach toe blaen y droed (in dancing) toe bys troed toe piston piston troed toe pistons piston troed toe tapping tapio sawdl blaen toe-cap blaen yr esgid toe-caps blaen yr esgid toga toga togas toga toggle togl toggle toglo toggle clamp clamp togl toggle clamps clamp togl toggles togl toilet toiled toilets toiled token arian tryc (in truck system) tokenism tocynistiaeth tokenisms tocynistiaeth tokens arian tryc (in truck system) tolerance goddefedd (to drugs etc) tolerance goddefgarwch (of people) tolerance goddefiant (of measurements etc) toleranced drawing lluniad goddefiannol toleranced drawings lluniad goddefiannol tolerances goddefedd (to drugs etc) tolerances goddefgarwch (of people) tolerances goddefiant (of measurements etc) tolerancing goddefiannu tolerate goddef toleration goddefgarwch (of people) tolerations goddefgarwch (of people) toll toll toll-bridge tollbont toll-bridges tollbont toll-gate tollborth toll-gates tollborth toll-road tollffordd toll-roads tollffordd tollage tollaeth tollages tollaeth tolls toll tom tom tom tom tom toms tom tom tomb bedd tombs bedd tommy-bar twmfar tommy-bars twmfar tommy-shop siop dryc tommy-shops siop dryc ton tunnell tonal cyweiraidd tonality cyweiredd tone tôn (of colour) tone painting seinliwio tone quality ansawdd tôn tone value gwerth tôn tone values gwerth tôn tone-deaf tôn-fyddar tones tôn (of colour) tongs gefel tongue tafod tongue tafodi tongue and groove tafod a rhych tongue and groove joint uniad tafod a rhych tongue and groove joints uniad tafod a rhych tongue depressor gwasgwr tafod tongue depressors gwasgwr tafod tongued mitre joint uniad meitr tafod tongued mitre joints uniad meitr tafod tongues tafod tonic tonig (=a thing that invigorates) tonic tonydd (musical) tonic chord cord y tonydd tonic chords cord y tonydd tonic major scale graddfa fwyaf y tonydd tonic major scales graddfa fwyaf y tonydd tonic minor scale graddfa leiaf y tonydd tonic minor scales graddfa leiaf y tonydd tonic seventh chord cord seithfed y tonydd tonic seventh chords cord seithfed y tonydd tonic sol-fa sol-ffa tonic sol-fas sol-ffa tonicity tonedd tonics tonig (=a thing that invigorates) tonics tonydd (musical) tonnage tunelledd tonnages tunelledd tonne tunnell fetrig tonnes tunnell fetrig tonsil tonsil tonsillitis tonsilitis tonsils tonsil tonsure tonsur tonsures tonsur too remote rhy bellennig tool erfyn tool bit erfyn turn tool bits erfyn turn tool box blwch offer tool boxes blwch offer tool chatter sgrytian erfyn tool holder daliwr offer tool holders daliwr offer tool post postyn offer tool posts postyn offer tool set steel dur offer tool set steels dur offer toolbar bar offer toolbars bar offer tooling gouge gaing gau offeru tooling gouges gaing gau offeru toolmaker's clamp clamp offerwr toolmaker's clamps clamp offerwr toolmaker's vice feis offerwr toolmaker's vices feis offerwr tools erfyn tools offer llaw tooth dant toothing plane plaen danheddog toothing planes plaen danheddog tooths dant top brig (of page, tree etc) top pen (of mountain etc) top top (in general) top wyneb (=surface) top bit did uchaf top bits did uchaf top drawer rail rheilen uchaf drôr top drawer rails rheilen uchaf drôr top fuller pannydd uchaf top fullers pannydd uchaf top half of page hanner uchaf y dudalen top loader peiriant top-lwytho top loaders peiriant top-lwytho top loading kiln odyn dop-lwytho top loading kilns odyn dop-lwytho top part darn uchaf top parts darn uchaf top priority prif flaenoriaeth top quality o'r ansawdd gorau top rail rheilen uchaf top rails rheilen uchaf top rake gwyredd cefn top rakes gwyredd cefn top rest briglithryn top rests briglithryn top slide llithryn uchaf top slides llithryn uchaf top speed buanedd uchaf top speeds buanedd uchaf top stitch wyneb-bwyth top stitches wyneb-bwyth top stitching wyneb-bwytho top swage darfath uchaf top swages darfath uchaf top-down programming rhaglennu dadelfennol topical argroenol (=on skin) topical preparation cymysgedd ar gyfer y croen topical preparations cymysgedd ar gyfer y croen topographic topograffig topographical topograffigol topography topograffi topological topolegol topology topoleg topping topio (saw teeth) topple dymchwel topset bed gwely uwch-haen topset beds gwely uwch-haen topsoil uwchbridd topsoils uwchbridd topspin troelli'r bêl tros ben tor twr torch tortsh (light) torches tortsh (light) tornado tornado torque torch (=necklace) torque trorym (=rotational effect of force) torque wrench tyndro trorym torque wrenches tyndro trorym torques torch (=necklace) torques trorym (=rotational effect of force) torrent cenllif torrent llifeiriant torrent tract blaendir afon torrent tracts blaendir afon torrents cenllif torrents llifeiriant torrid crasboeth torrid zone cylchfa grasboeth torrid zones cylchfa grasboeth torsion dirdro torsion balance clorian ddirdro torsion balances clorian ddirdro torsion bar trofar torsion bars trofar torsion free diddirdro torsional dirdroadol torsions dirdro torso torso tort camwedd (civil wrong) tortious liability atebolrwydd camweddus torts camwedd (civil wrong) torture arteithio torus torws torus moulding mowldin torws torus mouldings mowldin torws total cyfanswm (number) total cyflawn (complete) total cost cyfanswm cost total costs cyfanswm cost total costs cyfanswm costau total internal reflection adlewyrchiad mewnol cyflawn total internal reflections adlewyrchiad mewnol cyflawn total output cyfanswm cynnyrch total outputs cyfanswm cynnyrch total payments cyfanswm taliadau total probability cyfanswm tebygolrwydd total quality management rheolaeth lwyr ar ansawdd total quality managements rheolaeth lwyr ar ansawdd total receipts cyfanswm derbyniadau total replacement amnewid cyflawn total replacements amnewid cyflawn total revenue cyfanswm refeniw total revenues cyfanswm refeniw total war rhyfel diarbed total wars rhyfel diarbed totalitarian totalitaraidd totality crynswth totals cyfanswm (number) totem totem totems totem touch cyffwrdd touch cyffyrddiad touch down llorio'r bêl (in ball games) touch in goal ystlys cwrt cais touch in goal line ystlys gwsg touch judge llumanwr touch judges llumanwr touch latch clicied gyffwrdd touch latches clicied gyffwrdd touch rugby rygbi bach touch screen sgrin gyffwrdd touch screens sgrin gyffwrdd touch sensitive sensitif i gyffyrddiad touched out allan drwy gyffwrdd touches cyffyrddiad touchline llinell ystlys touchlines llinell ystlys tough gwydn toughness gwydnwch tour taith tour operator trefnydd teithiau tour operators trefnydd teithiau tourism twristiaeth tourism development datblygiad twristiaeth tourism development plan cynllun datblygu twristiaeth tourism development plans cynllun datblygu twristiaeth tourism developments datblygiad twristiaeth tourism facilities cyfleusterau twristiaeth tourism officer swyddog twristiaeth tourism officers swyddog twristiaeth tourisms twristiaeth tourist board bwrdd croeso tourist boards bwrdd croeso tourist centre canolfan croeso tourist centres canolfan croeso tourist industry diwydiant ymwelwyr tourist information gwybodaeth i ymwelwyr tourist information assistant cynorthwyydd gwybodaeth i ymwelwyr tourist information assistants cynorthwyydd gwybodaeth i ymwelwyr tourist informations gwybodaeth i ymwelwyr tournament twrnamaint tournaments twrnamaint tourniquet rhwymyn tynhau tourniquet tynhawr (bowsaw) tourniquets rhwymyn tynhau tourniquets tynhawr (bowsaw) tours taith towards the harp gwrogaeth i'r delyn (in dance) towards the harps gwrogaeth i'r delyn (in dance) towel tywel towel rail rheilen dywelion towel rails rheilen dywelion towelling tywelin towellings tywelin towels tywel tower tŵr towering cloud cwmwl tyrog towering clouds cwmwl tyrog towers tŵr town tref town crier cyhoeddwr town criers cyhoeddwr town planning cynllunio tref towns tref townscape treflun townscapes treflun township trefgordd townships trefgordd toxaemia tocsaemia toxaemias tocsaemia toxic gwenwynig toxicity gwenwyndra toxin tocsin toxins tocsin toy tegan trace dargopïo (=copy over) trace mymryn (of particle) trace olin (of line) trace olrhain (=discover) trace element elfen hybrin trace elements elfen hybrin tracer olinydd tracers olinydd tracery treswaith traces mymryn (of particle) traces olin (of line) trachea tracea tracheal traceol tracheas tracea tracheid traceid (softwood) tracheids traceid (softwood) tracheostomy care gofal y traceostomi tracheostomy cares gofal y traceostomi tracing cloth lliain dargopïo tracing cloths lliain dargopïo tracing paper papur dargopïo tracing papers papur dargopïo tracing punch pwnsh olinio tracing punches pwnsh olinio tracing wheel olwyn ddargopïo tracing wheels olwyn ddargopïo track llwybr (=path) track trac (in sport, of sliding door etc) track event cystadleuaeth drac track events cystadleuaeth drac track junction cyffordd traciau track junctions cyffordd traciau track multiple or single amldrac neu untrac track rod rhoden lwybro track rods rhoden lwybro tracking cledru (with camera on tracks) tracking device dyfais lwybro tracking devices dyfais lwybro tracking sheet dalen lwybro tracking sheets dalen lwybro tracks llwybr (=path) tracks olion traed tracks trac (in sport, of sliding door etc) tracksuit tracwisg tracksuits tracwisg tract darn o dir (of land) traction tyniant traction feed porthi cocos tractions tyniant tractive force grym tynnol tractive forces grym tynnol tractrix tractrics tractrixes tractrics tracts darn o dir (of land) trade crefft (=craft) trade masnach (=commerce) trade masnachu trade association cymdeithas masnachu trade associations cymdeithas masnachu trade bloc bloc masnach trade blocs bloc masnach trade creditor credydwr masnach trade creditors credydwr masnach trade customer cwsmer masnach trade customers cwsmer masnach trade debtor dyledwr masnach trade debtors dyledwr masnach trade directory cyfarwyddiadur masnachol trade discount disgownt masnach trade discounts disgownt masnach trade liberalisation measure mesur rhyddfrydoli masnach trade liberalisation measures mesur rhyddfrydoli masnach trade press gwasg fasnachol trade restriction cyfyngiad masnach trade restrictions cyfyngiad masnach trade supplier cyflenwr masnach trade suppliers cyflenwr masnach trade union undeb llafur trade union legislation deddfwriaeth undebau llafur trade union legislations deddfwriaeth undebau llafur trade unionism undebaeth lafur trade unionisms undebaeth lafur trade unions undeb llafur trade wind gwynt cyson trade winds gwynt cyson trade-route llwybr masnach trade-routes llwybr masnach trademark nod masnach trademarks nod masnach trader masnachwr traders masnachwr trades crefft (=craft) trades masnach (=commerce) trading estate stad fasnachol trading estates stad fasnachol trading post canolfan fasnachol trading posts canolfan fasnachol trading profit and loss account cyfrif masnachu, elw a cholled trading profit and loss accounts cyfrif masnachu, elw a cholled trading quarter rhan masnach (=zone) trading quarters rhan masnach (=zone) trading restriction cyfyngiad masnachol trading restrictions cyfyngiad masnachol trading stamp stamp masnachu trading stamps stamp masnachu trading standards safonau masnachu tradition traddodiad traditional traddodiadol traditional construction adeiladwaith traddodiadol traditional constructions adeiladwaith traddodiadol traditional design cynllun traddodiadol traditional designs cynllun traddodiadol traditional instrument offeryn traddodiadol traditional instruments offeryn traddodiadol traditional material defnydd traddodiadol traditional materials defnydd traddodiadol traditional morality moesoldeb traddodiadol traditional set dance dawns set draddodiadol traditional set dances dawns set draddodiadol traditions traddodiad traffic trafnidiaeth traffic congestion tagfeydd trafnidiaeth traffic jam tagfa drafnidiaeth traffic jams tagfa drafnidiaeth traffic offence trosedd drafnidiol traffic offences trosedd drafnidiol traffics trafnidiaeth tragacanth gwm tragacanth tragacanths gwm tragacanth tragedy trasiedi trail llwybr trail llwybro trail angle ongl ddilyn trail angles ongl ddilyn trail enamel enamel llusg trail enamelling enamlo llusg trail enamels enamel llusg trailer rhaghysbyseb (before a film) trailers rhaghysbyseb (before a film) trails llwybr train dilyniant (of waves) train hyfforddi train trên (gear) trainee hyfforddai trainee teacher athrawes dan hyfforddiant (female) trainee teacher athro dan hyfforddiant (male) trainee teachers athrawes dan hyfforddiant (female) trainee teachers athro dan hyfforddiant (male) trainees hyfforddai trainer hyfforddwr trainers hyfforddwr training hyfforddiant training agency asiantaeth hyfforddi training centre canolfan hyfforddi training centres canolfan hyfforddi training college coleg hyfforddi training colleges coleg hyfforddi training day diwrnod hyfforddi training grant grant hyfforddi training grants grant hyfforddi training hospital ysbyty hyfforddi training hospitals ysbyty hyfforddi training initiative menter hyfforddi training initiatives menter hyfforddi training method dull hyfforddi training methods dull hyfforddi training officer swyddog hyfforddi training officers swyddog hyfforddi training programme rhaglen hyfforddi training programmes rhaglen hyfforddi training session sesiwn hyfforddi training sessions sesiwn hyfforddi training zone cylchfa ymarfer training zones cylchfa ymarfer trainings hyfforddiant trains dilyniant (of waves) trains trên (gear) traitor bradwr traitors bradwr trajectory taflwybr tramline ystlyslin (in tennis) tramlines ystlyslin (in tennis) trampette trampét trampettes trampét trampoline trampolîn trampolines trampolîn tramroad tramffordd tramroads tramffordd tranquillizer tawelydd tranquillizers tawelydd transaction trafod transaction cost cost trafod transaction costs cost trafod transaction file ffeil drafod transaction files ffeil drafod transaction processing prosesu trafodion transactional analysis dadansoddi trafodol transactions trafod transamination trawsamineiddiad transaminations trawsamineiddiad transatlantic trawsiwerydd transcendental trosgynnol transcontinental trawsgyfandirol transcribe trawsgrifio transcription trawsgrifiad transcription error gwall trawsysgrifol transcription errors gwall trawsysgrifol transcriptions trawsgrifiad transducer trawsddygiadur transducers trawsddygiadur transduction trawsddygiad transduction trosglwyddiad transductions trawsddygiad transductions trosglwyddiad transect trawslun transect trawslunio transects trawslun transept croesfa transepts croesfa transfer trallwyso (blood) transfer trosglwyddiad (=reallocation) transfer trosglwyddo (in general) transfer trosglwyddyn (=transferable design) transfer troslun (=coloured picture) transfer RNA RNA trosglwyddol transfer age oed symud (between schools) transfer ages oed symud (between schools) transfer cost trosglwyddo'r gost transfer deed gweithred drosglwyddo transfer deeds gweithred drosglwyddo transfer earnings enillion trosglwyddo transfer energy trosglwyddo egni transfer ink inc troslunio transfer inks inc troslunio transfer matter trosglwyddo mater transfer paper papur troslunio transfer papers papur troslunio transfer payment taliad trosglwyddo transfer payments taliad trosglwyddo transferability trosglwyddedd transferable trosglwyddadwy transfers trosglwyddiad (=reallocation) transfers trosglwyddyn (=transferable design) transfers troslun (=coloured picture) transfinite trawsfeidraidd transfluence trawslifiant transfluences trawslifiant transform trawsffurf transform trawsffurfio transform integral equation hafaliad integrol trawsffurfiol transform integral equations hafaliad integrol trawsffurfiol transformation trawsffurfiad transformation geometry geometreg trawsffurfiadau transformation of functions trawsffurfio ffwythiannau transformations trawsffurfiad transformer newidydd transformers newidydd transforms trawsffurf transfuse trallwyso transfusion trallwysiad transfusions trallwysiad transgression tresmasiad transgressions tresmasiad transhumance trawstrefa transistor transistor transistors transistor transit croesiad transit camp gwersyll dros dro transit camps gwersyll dros dro transit region rhanbarth trawstaith transit regions rhanbarth trawstaith transition pont (=connecting passage in music) transition trawsgyweiriad (into another key) transition trawsnewidiad (=change) transition trosiad (in physics) transition element elfen drosiannol transition elements elfen drosiannol transition metal metel trosiannol transition metal complex cymhlyg metelau trosiannol transition metal complexes cymhlyg metelau trosiannol transition metals metel trosiannol transition piece darn cyfnewid transition pieces darn cyfnewid transition state cyflwr trosiannol transition states cyflwr trosiannol transitional trawsnewidiol (=changing) transitional zone cylchfa ryngbarthol (geographic) transitional zones cylchfa ryngbarthol (geographic) transitions pont (=connecting passage in music) transitions trawsgyweiriad (into another key) transitions trawsnewidiad (=change) transitions trosiad (in physics) transitive trosaidd transitory dros dro transits croesiad translate cyfieithu (from one language to another) translate symud (=move) translate trawsfudo (energy etc) translate trosi (in biochemistry) translation cyfieithiad (from one language to another) translation symudiad (of bishop etc) translation trawsfudiad (between places) translation trosiad (of ideas) translational trawsfudol translational energy egni trawsfudol translations cyfieithiad (from one language to another) translations symudiad (of bishop etc) translations trawsfudiad (between places) translations trosiad (of ideas) transliterate trawslythrennu translocated weed killer chwynladdwr trawsleoledig translocated weed killers chwynladdwr trawsleoledig translocation trawsleoliad translocations trawsleoliad translucency tryleuedd translucent tryleu translucent china tsieni tryleu translucent chinas tsieni tryleu translucent colour lliw tryleu translucent colours lliw tryleu translucent enamel enamel tryleu translucent enamels enamel tryleu translucent materials defnyddiau tryleu transmission trawsyriant (of heat, sound) transmission trosglwyddiad (of message, parcel) transmission model model trosglwyddo transmission models model trosglwyddo transmission of sound waves trawsyriant tonnau sain transmissions trawsyriant (of heat, sound) transmissions trosglwyddiad (of message, parcel) transmit trawsyrru (heat, sound) transmit trosglwyddo (message, parcel) transmitter trawsyrrydd (of heat, sound) transmitter trosglwyddydd (for broadcasting) transmitters trawsyrrydd (of heat, sound) transmitters trosglwyddydd (for broadcasting) transmutation trawsnewidiad transmutations trawsnewidiad transparency tryloywder transparency window ffenestr dryloyw transparency windows ffenestr dryloyw transparent tryloyw transparent brown brown tryloyw transparent browns brown tryloyw transparent colour lliw tryloyw transparent colours lliw tryloyw transparent enamel enamel tryloyw transparent enamels enamel tryloyw transparent glaze gwydredd tryloyw transparent glazes gwydredd tryloyw transparent gummed paper papur gwm tryloyw transparent gummed papers papur gwm tryloyw transparent material defnydd tryloyw transparent materials defnydd tryloyw transparent paper papur tryloyw transparent papers papur tryloyw transparent ruler riwl dryloyw transparent rulers riwl dryloyw transpiration trydarthiad transpiration rate cyfradd trydarthu transpiration rates cyfradd trydarthu transpiration stream llif trydarthol transpiration streams llif trydarthol transpirations trydarthiad transpire trydarthu transplant trawsblaniad transplant trawsblannu transplantation trawsblaniad transplantations trawsblaniad transplanted trawsblanedig transplants trawsblaniad transport cludiant (of goods etc) transport cludo transport cludydd (mechanism) transport link cysylltiad cludiant transport links cysylltiad cludiant transport medium cyfrwng cludo transport mediums cyfrwng cludo transport route ffordd gludiant transport routes ffordd gludiant transportation trawsgludiad transportations trawsgludiad transports cludiant (of goods etc) transports cludydd (mechanism) transpose trawsddodi (in algebra) transpose trawsddodyn (in algebra) transpose trawsnodi (in music) transposes trawsddodyn (in algebra) transposing instrument offeryn trawsnodi transposing instruments offeryn trawsnodi transposition trawsddodiad (in algebra) transposition trawsnodiad (in music) transpositions trawsddodiad (in algebra) transpositions trawsnodiad (in music) transshipment point pwynt trawslwytho transshipment points pwynt trawslwytho transubstantiation traws-sylweddiad transubstantiations traws-sylweddiad transversal ardrawslin transversals ardrawslin transverse ardraws transverse coastline morlin ardraws transverse coastlines morlin ardraws transverse flute ffliwt draws transverse flute player canwr ffliwt draws transverse flute players canwr ffliwt draws transverse flutes ffliwt draws transverse process cnepyn traws transverse projection tafluniad ardraws transverse projections tafluniad ardraws transverse section toriad ardraws transverse sections toriad ardraws transverse vibration dirgryniad ardraws transverse vibrations dirgryniad ardraws transverse wave ton ardraws transverse waves ton ardraws trap magl (=snare) trap maglu (=snare) trap trap (for water, oil etc) trap trapio (the ball) trapezium trapesiwm trapeziums trapesiwm trapezoid trapesoid trapezoids trapesoid traps magl (=snare) traps trap (for water, oil etc) traste cribell trastes cribell trauma trawma traumas trawma travel teithio travel agent asiantaeth deithio travel agent trefnwr teithiau travel agents asiantaeth deithio travel agents trefnwr teithiau travel destination cyrchfan teithio travel destinations cyrchfan teithio travel supplement atodiad teithio travel supplements atodiad teithio travel through a space teithio i mewn ac allan o ofod (in dance etc) travelling dance dawns deithiol travelling dances dawns deithiol travelling microscope microsgop teithiol travelling microscopes microsgop teithiol travelling step step deithio travelling steps step deithio traverse tramwy (of lathe carriage) traverse trawstaith (in mountaineering) traverses tramwy (of lathe carriage) traverses trawstaith (in mountaineering) travertine trafertin travertines trafertin trawl treillio trawl net treillrwyd trawl nets treillrwyd trawler treillong (ship) trawlers treillong (ship) tray hambwrdd tray base sylfaen hambwrdd tray bases sylfaen hambwrdd tray cloth lliain hambwrdd tray cloths lliain hambwrdd treachery brad tread gris (of stairs) tread and riser gris ac wyneb tread water troedio'r dŵr treadle troedlath treadles troedlath treadmill melin droedlath treadmills melin droedlath treads gris (of stairs) treason brad treasons brad treasure basket basged drysor treasure baskets basged drysor treasury trysorlys treat trin treatise traethawd treatises traethawd treatment triniaeth treatment room ystafell driniaeth treatment rooms ystafell driniaeth treatments triniaeth treaty cytundeb treble trebl treble boost atgyfnerthiad trebl treble boosts atgyfnerthiad trebl treble cut toriad trebl treble cuts toriad trebl treble instrument offeryn trebl treble instruments offeryn trebl trebles trebl tree coeden tree branch cangen coeden tree branches cangen coeden tree diagram diagram canghennog tree diagrams diagram canghennog tree line coedlin tree lines coedlin tree trunk boncyff tree trunks boncyff trees coeden trellis smocking smocwaith dellt trellis smockings smocwaith dellt trellised delltog tremolando tremolando tremolo tremolo tremor cryndod tremors cryndod trench ffos trench foundation sylfaen ffos trench foundations sylfaen ffos trenches ffos trenching rhigoli trend tuedd trend surface analysis dadansoddiad arwyneb tuedd trends tuedd trental trental trentals trental trespass tresmasiad trespass tresmasu trespasser tresmaswr trespassers tresmaswr trestle trestl trestles trestl triad triad triads triad triage brysbennu trial arbrawf (=experiment) trial arbrofol (=experimental) trial rhagbrofi (=test beforehand) trial treial (in sport) trial balance mantolen brawf trial balances mantolen brawf trial by battle prawf trwy ornest trial by his peers prawf gan ei gydradd trial by jury treial gan reithgor trial by ordeal diheurbrawf trial print print arbrofol trial printing prawf-brintio trial prints print arbrofol trials arbrawf (=experiment) trials treial (in sport) triangle triongl triangle of forces triongl grymoedd triangle of velocities triongl cyflymderau triangles triongl triangular trionglog triangular arch bwa trionglog triangular arches bwa trionglog triangular bandage rhwymyn trionglog triangular bandages rhwymyn trionglog triangular cleat cledd trionglog (sash window) triangular cleats cledd trionglog (sash window) triangular file ffeil dairongl triangular files ffeil dairongl triangular number rhif triongl triangular numbers rhif triongl triangular prism prism triongl triangular prisms prism triongl triangular pyramid pyramid trionglog triangular pyramids pyramid trionglog triangular scraper sgrafell dairongl triangular scrapers sgrafell dairongl triangularity trionglogrwydd triangulation triongliant triangulation pillar piler triongli triangulation pillars piler triongli triangulations triongliant tribal llwythol tribalism llwytholdeb tribalisms llwytholdeb tribe llwyth tribes llwyth tribunal tribiwnlys tribunals tribiwnlys tribune tribiwn tribunes tribiwn tributary llednant tributary region rhanbarth ategol tributary regions rhanbarth ategol tribute teyrnged (of respect or affection) tribute treth (=payment) tributes teyrnged (of respect or affection) tributes treth (=payment) tricel tricel tricels tricel triceps cyhyryn triphen trick marionette marionét tric trick marionettes marionét tric trickle diferynnu tricolour baner drilliw tricolours baner drilliw tricuspid valve falf deirlen tricuspid valves falf deirlen trident tryfer tridents tryfer triennial teirblwydd trier profwr triers profwr triforium trifforiwm triforiums trifforiwm trig point piler triongli trig points piler triongli triglyceride triglyserid triglycerides triglyserid trigonal trigonol trigonal bipyramid deubyramid trigonol trigonal bipyramids deubyramid trigonol trigonometric trigonometrig trigonometric function ffwythiant trigonometrig trigonometric functions ffwythiant trigonometrig trigonometrical trigonometregol trigonometry trigonometreg trihedral trihedrol trikaya trikaya trikayas trikaya trim trimio trim and snip trimio a snipio trim with lace addurno â les trimer trimer trimers trimer trimester tymor trimesters tymor trimetric projection tafluniad trimetrig trimetric projections tafluniad trimetrig trimmer trimiwr trimmers trimiwr trimming addurn (decoration) trimming knife cyllell drimio trimming knifes cyllell drimio trimmings addurn (decoration) trinket box blwch tlysau trinket boxes blwch tlysau trinomial trinomaidd trinomial trinomial trinomials trinomial trio triawd (group) trio trio (movement) trio sonata sonata drio trio sonatas sonata drio triode triod triodes triod trip baglu trip taith (of long duration) trip trip (of short duration) tripartite tridarn triple triawd (=set of three) triple triphlyg triple triphlyg (in general) triple bond bond triphlyg triple bonds bond triphlyg triple counterpoint gwrthbwynt triphlyg triple counterpoints gwrthbwynt triphlyg triple fugue ffiwg driphlyg triple fugues ffiwg driphlyg triple glazed window ffenestr gwydr triphlyg triple glazed windows ffenestr gwydr triphlyg triple harp telyn deires triple harps telyn deires triple immunization imiwneiddiad triphlyg triple immunizations imiwneiddiad triphlyg triple jump naid driphlyg triple jumps naid driphlyg triple point pwynt triphlyg triple points pwynt triphlyg triple roof to fframiog triple roofs to fframiog triple tonguing tafodi triphlyg triple vaccine brechlyn triphlyg triple vaccines brechlyn triphlyg triple-point stilts stiltiau tri-phwynt triples triawd (=set of three) triples triphlyg (in general) triplet tripled triplets tripled tripod trybedd tripods trybedd trips taith (of long duration) trips trip (of short duration) triratna triratna triratnas triratna trisect teirannu (in general) trisect traeannu (equal parts) trisection teiraniad (in general) trisection traeaniad (in equal parts) trisections teiraniad (in general) trisections traeaniad (in equal parts) triumphant gorfoleddus triumvir triwr triumvirate triwriaeth triumvirates triwriaeth triumvirs triwr trivet trybedd trivets trybedd trivial distadl trochoid trocoid trochoids trocoid trolley troli trolley bed gwely troli trolley beds gwely troli trolley jack jac troli trolley jacks jac troli trombone trombôn trombone tenor trombôn tenor trombone tenors trombôn tenor trombones trombôn trombonist trombonydd trombonists trombonydd tromino tromino troop ship llong filwyr troop ships llong filwyr trophic troffig trophic level lefel droffig trophic levels lefel droffig trophy tlws tropic trofan tropical trofannol tropical continental trofannol-gyfandirol tropical desert diffeithdir trofannol tropical deserts diffeithdir trofannol tropical maritime trofannol-arforol tropical rainforest coedwig law drofannol tropical rainforests coedwig law drofannol tropical zone cylchfa drofannol tropical zones cylchfa drofannol tropics trofan tropics trofannau tropism tropedd tropisms tropedd tropopause tropoffin tropopauses tropoffin troposphere troposffer tropospheres troposffer trot tuth trot tuthio trots tuth troubadour trwbadŵr troubadours trwbadŵr trough cafn trough cafn o wasgedd isel (pressure) trough shaped valley dyffryn cafnog trough's end blaen cafn trough's ends blaen cafn troughs cafn troughs cafn o wasgedd isel (pressure) trousers trowsus trowel trywel trowels trywel truancy triwantiaeth truant triwant truants triwant truce cadoediad truces cadoediad truck tryc truck shop siop dryc truck shops siop dryc truckle bed gwely treigl truckle beds gwely treigl trucks tryc true cywir (=correct, accurate) true gwir (=veracious, real) true bearing cyfeiriant cywir true bearings cyfeiriant cywir true bias gwir fias true discount gwir ddisgownt true discounts gwir ddisgownt true ellipse gwir elips true ellipses gwir elips true fruit gwir ffrwythyn true fruits gwir ffrwythyn true length hyd cywir true lengths hyd cywir true magnetic magnetig cywir true magnetics magnetig cywir true north gogledd cywir true norths gogledd cywir true or false cywir neu anghywir (in exam questions) true rate of interest gwir gyfradd llog true shape gwir siâp true shapes gwir siâp true size maint cywir true sizes maint cywir true string tant cywirsain true strings tant cywirsain true vertical height uchder fertigol cywir true vertical heights uchder fertigol cywir trueness to type gwirdeiprwydd trumpet utgorn trumpeter trwmpedwr trumpeters trwmpedwr trumpets utgorn truncate blaendorri truncated blaendor truncated uwchdor (of soil) truncated cone côn blaendor truncated cones côn blaendor truncated cylinder silindr blaendor truncated cylinders silindr blaendor truncated prism prism blaendor truncated prisms prism blaendor truncated pyramid pyramid blaendor truncated pyramids pyramid blaendor truncated soil pridd uwchdor truncated soils pridd uwchdor truncated spur sbardun blaendor truncated spurs sbardun blaendor truncation blaendoriad truncation error gwall blaendorri truncation errors gwall blaendorri truncations blaendoriad truncheon pastwn truncheons pastwn trunk bongorff (of body) trunk exercise ymarfer bongorff trunk exercises ymarfer bongorff trunk road cefnffordd trunk roads cefnffordd trunk stream prif ffrwd trunk streams prif ffrwd trunks bongorff (of body) trunks trowsus nofio (for swimming) trunnion trynion trunnions trynion truss cwpl trussed cypledig trussed rafter ceibr cypledig trussed rafters ceibr cypledig trust ymddiried trust ymddiriedolaeth trust status statws ymddiriedolaeth trustee ymddiriedolwr trustees ymddiriedolwr trusteeship ymddiriedolaeth trusteeship council cyngor ymddiriedolaeth trusteeship councils cyngor ymddiriedolaeth trusteeship territory tiriogaeth ymddiriedol trusteeships ymddiriedolaeth trusts ymddiriedolaeth truth table gwirlen truth tables gwirlen try cais (in rugby) try square sgwâr profi try squares sgwâr profi trying plane plaen hir trying planes plaen hir tryptophan tryptoffan tryptophans tryptoffan tsarism tsariaeth tsarisms tsariaeth tsunami tsunami tsunamis tsunami tub twb tub twbio tub four twb pedwar tub fours twb pedwar tub pair twb pâr tub pairs twb pâr tuba tiwba tuba player canwr tiwba tuba players canwr tiwba tubas tiwba tube tiwb tuber cloronen tubers cloronen tubes tiwb tubing tiwbin tubings tiwbin tubular tiwbaidd tubular aluminium alwminiwm tiwbaidd tubular aluminiums alwminiwm tiwbaidd tubular bells tiwbglychau tubular brass pres tiwbaidd tubular bridge pont diwb tubular bridges pont diwb tubular gauze rhwyllen diwb tubular gauzes rhwyllen diwb tubular heater gwresogydd tiwb tubular heaters gwresogydd tiwb tubular steel dur tiwbaidd tubular steels dur tiwbaidd tubule tiwbyn tubules tiwbyn tuck twc tucked hem hem dwc tucked hems hem dwc tucks twc tufa twffa tufas twffa tuff twff tuffaceous tyffaidd tuffs twff tuft cudyn tufted cudynnog tufted carpet carped cudynnog tufted carpets carped cudynnog tufts cudyn tug tynfad tug o war tynnu rhaff tuition fees ffïoedd dysgu tulle tulle tulles tulle tumble drier peiriant sychu dillad tumble driers peiriant sychu dillad tumble dry sychu mewn peiriant tumble gear gêr twmblo tumble gears gêr twmblo tumbler drive barrel casgen gyriant twmblo tumbler drive barrels casgen gyriant twmblo tumbrel trol tumbrels trol tumour tyfiant tumours tyfiant tumulus gwyddfa tuna tiwna tunas tiwna tundra twndra tundras twndra tune alaw tuned circuit cylched gysain tuned circuits cylched gysain tuned instrument offeryn traw tuned instruments offeryn traw tuned percussion instrument offeryn taro tiwniedig tuned percussion instruments offeryn taro tiwniedig tuner tiwniwr tuners tiwniwr tunes alaw tungsten twngsten (W) tungsten carbide twngsten carbid tungsten carbide paper papur twngsten carbid tungsten carbide papers papur twngsten carbid tungsten carbides twngsten carbid tungsten steel dur twngsten tungsten steels dur twngsten tungsten tipped blaen twngsten (lathe toll forms) tungsten tippeds blaen twngsten (lathe toll forms) tungstens twngsten (W) tunic tiwnig tunics tiwnig tuning fork trawfforch tuning forks trawfforch tuning hammer morthwyl cyweirio tuning hammers morthwyl cyweirio tuning key allwedd diwnio tuning note cyweirdant tuning notes cyweirdant tuning pin ebill cyweirio tuning pins ebill cyweirio tuning string cyweirdant tuning strings cyweirdant tunnage & poundage treth gasgen a phwysau tunnage & poundages treth gasgen a phwysau tunnel twnnel tunnels twnnel turban twrban turbans twrban turbary mawnog (of land) turbid cymylog turbidity cymylogrwydd turbidity current cerrynt tyrfedd turbidity currents cerrynt tyrfedd turbine tyrbin turbines tyrbin turbo-generator generadur tyrbo turbo-generators generadur tyrbo turbulence cynnwrf (in general) turbulence tyrfedd (in meteorology) turbulences cynnwrf (in general) turbulences tyrfedd (in meteorology) turbulent cynhyrfus (in general) turbulent tyrfol (in meteorology) turbulent flow llif tyrfol turbulent flows llif tyrfol turgid chwydd-dynn turgidity chwydd-dyndra turn tro turn troi (in general) turn trosi (ideas) turn turnio (lathe) turn a partner troi partner turn and give troi a rhoi turn in a coil tro mewn coil turn on an engine cychwyn injan turn on the ball troi ar y bêl turn out the light diffodd y golau turn single tro unfan turn singles tro unfan turn the electric fire off diffodd y tân trydan turn the electric fire on cynnau'r tân trydan turn the heel troi'r sawdl turn the scrum olwyno'r sgrym turn the tap off cau'r tap turn the tap on agor y tap turn-taking cymryd tro turner turniwr turners turniwr turnery turnwriaeth turning troad (=bend) turning allowance lwfans troi turning allowances lwfans troi turning between centres turnio rhwng canolau turning chisel cŷn turnio turning chisels cŷn turnio turning force grym troi turning forces grym troi turning point trobwynt turning points trobwynt turning tool erfyn turnio turning tools erfyn turnio turnings troad (=bend) turnip meipen turnips meipen turnkey system system osodedig turnkey systems system osodedig turnover trosiant turnover board bwrdd dymchwel turnover boards bwrdd dymchwel turnovers trosiant turnpike tyrpeg turnpike company cwmni tyrpeg turnpikes tyrpeg turns tro turntable bwrdd tro turntables bwrdd tro turpentine tyrpant turpentines tyrpant turps substitute amnewidyn tyrpant turps substitutes amnewidyn tyrpant turquoise glaswyrdd (enamelling colour) turquoises glaswyrdd (enamelling colour) turret twred turrets twred turtle crwban turtle graphics graffeg crwban turtle neck gwddf crwban turtle necks gwddf crwban turtles crwban tusk tenon tyno ysgithr tusk tenon joint uniad tyno ysgithr tusk tenon joints uniad tyno ysgithr tusk tenons tyno ysgithr tussock sypwellt (bunch grass) tussocks sypwellt (bunch grass) tussore tussore tutelage gwarchodaeth tutelages gwarchodaeth tutor tiwtor tutor group grŵp tiwtor tutor groups grŵp tiwtor tutor-organiser tiwtor drefnydd tutor-organisers tiwtor drefnydd tutorial tiwtorial tutorials tiwtorial tutors tiwtor tuyère tuyère tuyères tuyère tweed brethyn caerog tweeds brethyn caerog tweezers gefel fach twelfth deuddegfed twelfth man deuddegfed dyn twelfth mans deuddegfed dyn twelfths deuddegfed twelve note technique techneg deuddeg nodyn twelve note techniques techneg deuddeg nodyn twentieth century ugeinfed ganrif twenty five yards pum llath ar hugain twice full size dwywaith maint llawn twig brigyn twigs brigyn twilight zone cylchfa gyfnosi twilight zones cylchfa gyfnosi twill twil twill weave gwehyddiad caerog twill weaves gwehyddiad caerog twills twil twin gefeilles (female) twin gefell (male) twin haunched dwbl hansiedig twin needle nodwydd ddwbl (of machine part) twin needles nodwydd ddwbl (of machine part) twin tenon tyno dwbl twin tenons tyno dwbl twin town gefeilldref twin towns gefeilldref twin tub machine peiriant twb dwbl twin tub machines peiriant twb dwbl twine cordeddu (in general) twine cortyn twine ymgordeddu (as in climbing plants) twines cortyn twinning gefeillio (of schools) twinning trefeillio (of towns) twins gefeilles (female) twins gefell (male) twist cordeddu (strands) twist dirdroad (of spiral) twist dirdroi (=give spiral form to) twist tro (=turn) twist troelli (in general) twist ymgordeddu (of strands) twist bit ebill tro twist bits ebill tro twist drill dril dirdro twist drill parts rhannau dril dirdro twist drills dril dirdro twisted dirdro twisted chain stitch pwyth cadwyn dro twisted chain stitches pwyth cadwyn dro twisted cord cortyn dirdro twisted cords cortyn dirdro twisted grain graen tro twisted grains graen tro twisted shank hoelen garan ddirdro twisted shanks hoelen garan ddirdro twisting dirdroi (forging process) twists dirdroad (of spiral) twists tro (=turn) twitch plwc twitch plycio twitches plwc two dau two bails dwy gaten two dimensional modelling modelu dau ddimensiwn two hands clean and jerk plwc dwy law two hands clean and jerks plwc dwy law two hands snatch cipiad dwy law two hands snatches cipiad dwy law two on the ball dau ar y bêl (of males) two on the ball dwy ar y bêl (of females) two plywood fillets dau ffiled pren haenog two step flow theory damcaniaeth llif dau gam two way switch switsh dwyffordd two way switches switsh dwyffordd two's complement cyflenwad deuol two's complements cyflenwad deuol two-digit dau ddigid two-dimensional dau ddimensiwn two-hand turn tro dwy law two-hand turns tro dwy law two-part deulais (in singing) two-part dwyran two-ply wool edafedd dwy gainc two-pronged chuck crafanc fforch ddwbl two-pronged chucks crafanc fforch ddwbl two-pronged fork fforch ddeubig two-pronged forks fforch ddeubig two-storey deulawr two-stroke dwystroc two-way loom gwŷdd dwyffordd two-way looms gwŷdd dwyffordd twos deuoedd tympanic membrane tympan y glust tympanic membranes tympan y glust tympanym tympanwm tympanyms tympanwm type math (=kind or sort) type teip (in printing) type teipio (=write with a typewriter) type checking math-wirio type holder daliwr teip type holders daliwr teip type metal metel teip type metals metel teip type of farming math o ffermio type of performance math o berfformiad type of throw natur y tafliad type station gorsaf deip type stations gorsaf deip typefont ffont-deip typefonts ffont-deip types math (=kind or sort) types teip (in printing) types of finishes dulliau o orffeniadau types of food mathau o fwyd types of support mathau o gymorth typewriter teipiadur typewriters teipiadur typhoon teiffŵn typhoons teiffŵn typing error gwall teipio typing errors gwall teipio typography teipograffeg tyrannical gormesol tyrannicide teyrnladdiad (crime) tyrannicide teyrnleiddiad (=person who kills a tyrant) tyrannicides teyrnladdiad (crime) tyrannicides teyrnleiddiad (=person who kills a tyrant) tyranny gormes tyrant teyrn tyrants teyrn tyrosine tyrosin tyrosines tyrosin tête de boeuf stitch pwyth tête de boeuf tête de boeuf stitches pwyth tête de boeuf u-turn tro pedol u-turns tro pedol ubac cil haul ubacs cil haul udder pwrs udders pwrs ukelele iwcalili ukeleles iwcalili ulcer briw ulcerate briwio ulcers briw ulna wlna ulnar nerve nerf wlnar ulnar nerves nerf wlnar ulnas wlna ultimatum wltimatwm ultimatums wltimatwm ultra violet lamp lamp uwchfioled ultra violet lamps lamp uwchfioled ultra violet light golau uwchfioled ultra violet lights golau uwchfioled ultra-fashionable tra ffasiynol ultrabasic wltrabasig ultracentrifuge uwchallgyrchydd ultracentrifuges uwchallgyrchydd ultrafiltration uwch-hidlo ultramarine dulas ultramarines dulas ultrasonic uwchsain ultrasonics uwchseineg (of science) ultrasound uwchsain ultrasounds uwchsain ultraviolet uwchfioled ultraviolet wave ton uwchfioled ultraviolet waves ton uwchfioled ultraviolets uwchfioled umbel wmbel umbels wmbel umber wmber umbers wmber umbilical wmbilig umbilical cord llinyn bogail umbilical cords llinyn bogail umbilicus bogail umma umma ummah ummah ummahs ummah ummas umma umpire dyfarnwr umpires dyfarnwr unaccented diacen unacceptable behaviour ymddygiad annerbyniol unacceptable behaviours ymddygiad annerbyniol unaccompanied digyfeiliant unaided heb gymorth unambiguous diamwys unauthorized absence absenoldeb heb ei awdurdodi unauthorized absences absenoldeb heb ei awdurdodi unbalanced diet deiet anghytbwys unbalanced diets deiet anghytbwys unbalanced forces grymoedd anghytbwys unbeneficed difywoliaeth unbiased di-fias (in physics) unbiased diduedd (in statistics) unbiased estimate amcangyfrif diduedd unbiased estimates amcangyfrif diduedd unbiased estimator amcangyfrifyn diduedd unbiased estimators amcangyfrifyn diduedd unbleached heb ei gannu unbleached calico calico heb ei gannu unbounded diarffin unbroken line llinell ddi-dor unbroken lines llinell ddi-dor unburnt heb losgi uncertainty principle egwyddor ansicrwydd uncertainty principles egwyddor ansicrwydd unchristian anghristnogol uncial wnsial uncials wnsial unclassified annosbarthedig unclear aneglur unconditional diamod unconditional branch instruction cyfarwyddyd canghennu diamod unconditional branch instructions cyfarwyddyd canghennu diamod unconditional jump naid ddiamod unconditional jump instruction cyfarwyddyd neidio diamod unconditional jump instructions cyfarwyddyd neidio diamod unconditional jumps naid ddiamod unconditional positive regard agwedd gadarnhaol ddiamod unconditional positive regards agwedd gadarnhaol ddiamod unconditional surrender ildio diamod unconditional transfer instruction gorchymyn trosglwyddo diamod unconditional transfer instructions gorchymyn trosglwyddo diamod unconformable beds haenau anghyffurfiadwy unconformity anghydffurfedd unconscious anymwybodol unconstitutional anghyfansoddiadol unconventional anghonfensiynol uncorrelated anghydberthnasol uncrushable anghrychadwy (finish) unction eneiniad olaf unctions eneiniad olaf undefined anniffiniedig under arm bowling bowlio dan ysgwydd under grasp tanafael under stitching tanbwytho under the action of gravity o dan effaith disgyrchiant under-employ tangyflogi under-nourish tanfaethu under-nourished heb ddigon o faeth under-pass tanffordd underachieve tangyflawni underachiever plentyn sy'n tangyflawni (of child) underachievers plentyn sy'n tangyflawni (of child) underarm cesail underarm pass pàs dan ysgwydd underarm throw tafliad dan ysgwydd underarm throws tafliad dan ysgwydd underarms cesail underblanket isflanced underblankets isflanced underclothing dillad isaf undercoat tanbeintio undercoat of paint tanbaent undercolour tanliw undercolours tanliw undercover cudd undercurrent islif undercurrents islif undercut tandoriad undercut tandorri undercut bank torlan undercut banks torlan undercuts tandoriad underdeveloped heb ddatblygu digon (of child) underdeveloped tanddatblygedig (of country etc) underemployment tangyflogaeth underemployments tangyflogaeth underface tanwyneb underface tanwynebu underfaces tanwyneb underfire tan ffwrndanio underfloor tanlawr underflow islif underflows islif underframe ffrâm isaf underframe rail rheilen isaf underframe rails rheilen isaf underframes ffrâm isaf underfur isflew underfurs isflew undergarments dillad isaf underglaze tanwydredd underglaze tanwydro underglaze colour lliw tanwydredd underglaze colours lliw tanwydredd underglazes tanwydredd underground tanddaearol underground movement mudiad cyfrin (=secret movement) underground movements mudiad cyfrin (=secret movement) undergrowth isdyfiant undergrowths isdyfiant underlay haen waelodol (of carpet) underline tanlinellu underline key tanlinellwr underlying gwaelodol underlying bedrock creigwely gwaelodol underlying bedrocks creigwely gwaelodol underlying pattern patrwm gwaelodol underlying patterns patrwm gwaelodol undermine tanseilio undernourishment diffyg maeth undernourishments diffyg maeth underpaid heb dâl digonol underpaint tanbaent underpaints tanbaent underpin tanategu underpinning knowledge gwybodaeth greiddiol underpinning knowledges gwybodaeth greiddiol underpopulated tanboblog underprivileged difreintiedig underprivileged group grŵp llai breintiedig underprivileged groups grŵp llai breintiedig underscoring tanlinellu undersheet isgynfas undersheets isgynfas undershot wheel rhod isredol undershot wheels rhod isredol underside ochr isaf undersides ochr isaf underskirt pais underskirts pais underspend tanwariant underspend tanwario underspends tanwariant understand deall understand the principles deall egwyddorion understanding dealltwriaeth understanding of style dealltwriaeth o arddull understandings dealltwriaeth understated bank balance mantolen fanc rhy isel understated bank balances mantolen fanc rhy isel understudy dirprwy undertake cyflawni undertaker ymgymerwr undertakers ymgymerwr undertaking ymgymeriad undertakings ymgymeriad underutilize tanddefnyddio underwater seal drainage draenio sêl tanddwr underwear dillad isaf underwrap islap underwraps islap underwrite gwarantu undetermined amhendant undetermined coefficient cyfernod amhendant undetermined coefficients cyfernod amhendant undo dadwneud (work, mistake etc) undo datod (knot, shoes etc) undress dadwisgo undulate ymdonni undulation ymdoniad undulations ymdoniad unearned income incwm heb ei ennill unearned incomes incwm heb ei ennill unearned investment income incwm eiddo unearned investment incomes incwm eiddo unemployable anghyflogadwy unemployed di-waith unemployment diweithdra unemployments diweithdra unenforceable anorfodadwy unequal anghyfartal (in general) unequal anhafal (in mathematics) unerisis wnerisis unethical anfoesegol uneven anwastad uneven growth rings cylchoedd tyfiant anwastad uneven plaid plad anghyson uneven plaids plad anghyson uneven surface arwyneb anwastad uneven surfaces arwyneb anwastad unexploited anghyffwrdd unfair annheg unfair play chwarae annheg unfamiliar anghyfarwydd unfamiliar context cyd-destun anghyfarwydd unfamiliar contexts cyd-destun anghyfarwydd unfamiliar environment amgylchedd anghyfarwydd unfamiliar environments amgylchedd anghyfarwydd unfasten agor unfenced di-ffens unfit anffit unforested di-goed ungentlemanly conduct ymddygiad anfonheddig ungentlemanly conducts ymddygiad anfonheddig ungraded anraddedig ungulate carnol ungulate carnolyn ungulates carnolyn unhappy customer cwsmer anfodlon unhappy customers cwsmer anfodlon unhitch datglymu unicellular ungellog unicorn uncorn unicorns uncorn unicursal uncwrsaidd unidentified species rhywogaeth anhysbys unification uniad unification of Italy uno'r Eidal unifications uniad unified unedig unified thread edau unol unified threads edau unol uniform gwisg ysgol (for school) uniform lifrai (military) uniform unffurf uniform benefit budd-dal unffurf uniform benefits budd-dal unffurf uniform fields meysydd unffurf uniform pitch pitsh unffurf uniform pitches pitsh unffurf uniform strength cryfder cyson uniform strengths cryfder cyson uniformitarianism unffurfiadaeth uniformitarianisms unffurfiadaeth uniformity unffurfiaeth uniforms gwisg ysgol (for school) uniforms lifrai (military) unify uno unilateral unochrog unimodular unfodiwlaidd unimolecular unfoleciwlaidd unindented annanheddus uninhabitable annrhigiadwy uninhabited anghyfannedd unintentional anfwriadol uninverted relief tirwedd ddiwrthdro uninverted reliefs tirwedd ddiwrthdro union cyswllt (join in mathematics) union undeb (=trade union, association etc) union uniad (act or instance of uniting) union of England and Wales uno Cymru a Lloegr union of sets uniad setiau union officer swyddog undeb union officers swyddog undeb unionism undebaeth unionisms undebaeth unionist undebwr (trade) unionist unoliaethwr (N. Ireland) unionists undebwr (trade) unionists unoliaethwr (N. Ireland) unions cyswllt (join in mathematics) unions undeb (=trade union, association etc) unions uniad (act or instance of uniting) unique unigryw unique God Duw unigryw unique factorization domain parth ffactoriad unigryw unique factorization domains parth ffactoriad unigryw uniqueness unigrywiaeth unisexual unrhywiol unison unsain unit uned unit unedol unit credit credyd uned unit credits credyd uned unit mould mowld uned unit moulds mowld uned unit of account uned cyfrif unit of competence uned cymhwysedd unit of design uned batrymu unit of heat uned wres unit pole pegwn uned unit poles pegwn uned unit price pris uned unit prices pris uned unit vector fector uned unit vectors fector uned unitarian undodaidd unitarian undodwr unitarianism undodiaeth unitarianisms undodiaeth unitarians undodwr unitary unedol unitary authority awdurdod unedol unitary method dull uned unitary methods dull uned united company cwmni unol units uned univalent unfalent universal cyffredinol universal benefit budd-dal cyffredinol universal benefits budd-dal cyffredinol universal donor rhoddwr cyffredinol universal donors rhoddwr cyffredinol universal indicator dangosydd cyffredinol universal indicators dangosydd cyffredinol universal joint cymal cyffredinol universal joints cymal cyffredinol universal recipient derbynnydd cyffredinol universal recipients derbynnydd cyffredinol universal set set gynhwysol universal sets set gynhwysol universal snips snipiwr cyffredinol universal square sgwâr cyffredinol universal squares sgwâr cyffredinol universal suffrage pleidlais gyffredinol universal suffrages pleidlais gyffredinol universal tinsnips snipiwr tun cyffredinol universal tongs gefel gyffredinol universe bydysawd universes bydysawd university prifysgol unknown anhysbys unknown anhysbysyn (in mathematics) unknowns anhysbysyn (in mathematics) unlawful interference ymyrraeth anghyfreithiol unlawful interferences ymyrraeth anghyfreithiol unleavened bread bara croyw unleavened breads bara croyw unlimited liability atebolrwydd llawn unmarried dibriod unmodulated anfodyledig unmodulated carrier wave ton gario heb ei modylu unmodulated carrier waves ton gario heb ei modylu unpack dadbacio unpaired digymar (of electrons) unpaired electron electron heb bâr unpaired electrons electron heb bâr unpaired terrace cerlannau anghyfatebol unparliamentary anseneddol unpick datod unplug datgysylltu plwg unpolluted heb ei lygru (with masculine nouns) unpredictable annarogan unpressed pleating pletio rhydd unprimed di-breim unproductive anghynhyrchiol unprovoked direswm unreactive anadweithiol unrelenting didostur unrest aflonyddwch unrests aflonyddwch unroll dadrolio unroof di-doi unsafe practice ymarferion anniogel unsaturated annirlawn unsaturated fatty acid asid brasterog annirlawn unsaturated fatty acids asid brasterog annirlawn unscrew dadsgriwio unseasoned timber pren heb ei sychu unseasoned timbers pren heb ei sychu unsegmented ansegmennol unset dadosod unsigned integer cyfanrif diarwydd unsigned integers cyfanrif diarwydd unskilled di-grefft (of worker) unskilled labour llafur di-grefft unskilled labours llafur di-grefft unskilled manual gweithiwr llaw di-grefft unskilled worker gweithiwr di-grefft unskilled workers gweithiwr di-grefft unsorted anhrefnedig unstable ansefydlog unstable equilibrium cydbwysedd ansefydlog unstable equilibriums cydbwysedd ansefydlog unstiffened waistband band gwasg heb ei gyfnerthu unstiffened waistbands band gwasg heb ei gyfnerthu unstitched calico mop mop calico heb ei bwytho unstitched calico mops mop calico heb ei bwytho unstratified dihaenedig unstretched diestyn unstrutted di-ais untempered nas tymherwyd untouchables anghyffyrddedigion untuned percussion instruments offerynnau taro di-draw untwist fibres gwahanu ffibrau unweighted amhwysol unweighted sample sampl amhwysol unweighted samples sampl amhwysol unwind dad-ddirwyn (wool) unwound wedi'i ddad-ddirwyn (of wool) up and over door drws esgyn up and under cic a chwrs (in rugby) up arrow saeth i fyny up arrows saeth i fyny up to date cyfoes up-count cyfrif i fyny up-counts cyfrif i fyny upbeat curiad i fyny upbeats curiad i fyny update diweddaru update y diweddaraf updates y diweddaraf upfold plyg i fyny upfolds plyg i fyny upgrade uwchraddio upholstered wedi'i chlustogi (with feminine nouns) upholstered wedi'i glustogi (with masculine nouns) upholstery clustogwaith upholstery nail hoelen glustogwaith upholstery nails hoelen glustogwaith upholstery needle nodwydd glustogwaith upholstery needles nodwydd glustogwaith upholstery spring sbring clustogwaith upholstery springs sbring clustogwaith upland uwchdir uplands uwchdir uplift ymgodi uplift ymgodiad uplift ymgodol uplifts ymgodiad upload llwytho i fyny upper air aer uchaf upper airs aer uchaf upper boundary arffin uchaf upper case llythrennau bras upper case letter priflythyren upper case letters priflythyren upper class dosbarth uchaf upper floor llawr uchaf upper floors llawr uchaf upper school ysgol uchaf upper schools ysgol uchaf upper sixth chweched uchaf upper sixths chweched uchaf upright unionsyth upright mortise lock clo mortais unionsyth upright mortise locks clo mortais unionsyth upright piano piano syth upright position safle unionsyth upright positions safle unionsyth upright posture ymddaliad unionsyth upright postures ymddaliad unionsyth upright vacuum cleaner sugnwr llwch unionsyth upright vacuum cleaners sugnwr llwch unionsyth uprising gwrthryfel uprisings gwrthryfel upset hollt (=a shake) upset grain graen cymysg upset grains graen cymysg upsets hollt (=a shake) upsetting clopáu (jumping up - forging process) upside down wyneb i waered upslope llethr gorifyny upslopes llethr gorifyny upstream i fyny'r afon upstroke blaenstroc upstrokes blaenstroc uptake mewnlifiad (of salts by a root) uptakes mewnlifiad (of salts by a root) upthrow side ochr esgynedig upthrow sides ochr esgynedig upthrust brigwth upthrusts brigwth uptime amser mynd uptimes amser mynd upward pressure gwasgedd i fyny upward pressures gwasgedd i fyny upward sloping curve cromlin esgynnol upward sloping curves cromlin esgynnol upwarp crychiad i fyny upwarps crychiad i fyny upwelling ymchwydd upwellings ymchwydd uranium wraniwm (U) uraniums wraniwm (U) urban trefol urban area ardal drefol urban areas ardal drefol urban community cymuned drefol urban environment amgylchedd trefol urban environments amgylchedd trefol urban field cylch trefol urban fields cylch trefol urban fringe cyrion trefol urban hierarchy hierarchaeth drefol urban history hanes trefol urban land use defnydd tir trefol urban land uses defnydd tir trefol urban renewal adnewyddiad trefol urban renewals adnewyddiad trefol urban sprawl blerdwf trefol urban sprawls blerdwf trefol urbanism trefolaeth urbanisms trefolaeth urbanize trefoli urbanized trefoledig urbanrural trefol-wledig urea wrea urea cycle cylchred wrea urea cycles cylchred wrea urea formaldehyde wrea fformaldehyd urea formaldehyde glue glud wrea fformaldehyd urea formaldehyde glues glud wrea fformaldehyd urea formaldehydes wrea fformaldehyd ureas wrea urease wreas ureases wreas ureter wreter ureters wreter urethra wrethra urethras wrethra urge annog urge cymhelliad urges cymhelliad uric acid asid wrig uric acids asid wrig uricotelic wricotelig urinals wrinalau urine troeth urine test prawf troeth urine tests prawf troeth urines troeth uriniferous tubule tiwbyn troeth uriniferous tubules tiwbyn troeth urn wrn urnfield yrnfaes urnfields yrnfaes urology wroleg use arfer (=custom) use defnydd (=being used) use defnyddio use mwyniant (=benefit or profit of lands) use and gratification defnydd a boddhad use of land defnyddio tir use of sources defnyddio ffynonellau use-height uchder defnydd use-heights uchder defnydd useful defnyddiol user defnyddiwr user dictionary geiriadur defnyddiwr user disk disg defnyddiwr user disks disg defnyddiwr user documentation dogfennaeth defnyddiwr user documentations dogfennaeth defnyddiwr user group grŵp defnyddwyr user groups grŵp defnyddwyr user interface rhyngwyneb defnyddiwr user interfaces rhyngwyneb defnyddiwr user-friendly cyfeillgar user-hostile package pecyn anghyfeillgar user-hostile packages pecyn anghyfeillgar user-unfriendly anghyfeillgar users defnyddiwr users and potential users defnyddwyr a defnyddwyr posibl usurp trawsfeddiannu usurpation trawsfeddiannaeth usurpations trawsfeddiannaeth usurper trawsfeddiannwr usurpers trawsfeddiannwr usury usuriaeth utensils offer uterine crothol uterus croth utilitarian iwtalitaraidd utilitarian iwtilitariad utilitarianism iwtilitariaeth utilitarianisms iwtilitariaeth utilitarians iwtilitariad utility defnyddioldeb utility gwasanaeth (of public utility) utility disk disg gwasanaethu utility disks disg gwasanaethu utility program rhaglen wasanaethu utility programs rhaglen wasanaethu utilization defnydd utilizations defnydd utilize defnyddio utricle wtrigl utricles wtrigl uvala wfala uvalas wfala uvinial wfinial vacancy swydd wag (for a job) vacation gwyliau vaccinate brechu vaccination brechiad vaccinations brechiad vaccine brechlyn vaccines brechlyn vacuole gwagolyn vacuoles gwagolyn vacuum gwactod vacuum bottle potel wactod vacuum bottles potel wactod vacuum chamber siambr wactod vacuum chambers siambr wactod vacuum cleaner sugnwr llwch vacuum cleaners sugnwr llwch vacuum flask fflasg wactod vacuum flasks fflasg wactod vacuum forming ffurfio â gwactod vacuum tools offer sugnwr llwch vacuums gwactod vadose uwch-lefel-trwythiad vadoses uwch-lefel-trwythiad vagabond crwydryn vagabondage crwydraeth vagabondages crwydraeth vagabonds crwydryn vagina gwain (of woman) vagina llawes goch (of cow, mare etc) vaginas gwain (of woman) vaginas llawes goch (of cow, mare etc) vagrancy crwydraeth vagrant crwydryn vagrants crwydryn vagus nerve nerf fagws vagus nerves nerf fagws vale dyffryndir valence falens valence bond theory damcaniaeth bond falens valence shell electron pair repulsion gwrthyriad parau electron plisgyn falens valence shell electron pair repulsions gwrthyriad parau electron plisgyn falens valences falens valency falens vales dyffryndir valid dilys valid screen sgrin ddilys valid screens sgrin ddilys validate dilysu validation dilysiad validation routine rheolwaith dilysu validation routines rheolwaith dilysu validation suite cyfres ddilysu validation suites cyfres ddilysu validations dilysiad validity dilysrwydd validity check prawf dilysrwydd validity checks prawf dilysrwydd valine falin valines falin valley dyffryn valley floor llawr y dyffryn valley floors llawr y dyffryn valley glacier rhewlif dyffryn valley glaciers rhewlif dyffryn valley head pen y dyffryn valley heads pen y dyffryn valley rafter ceibr cafn valley rafters ceibr cafn valley roof to cafnog valley roofs to cafnog valley tract dyffryndir afon valley tracts dyffryndir afon valley train rhes dyffryn valley trains rhes dyffryn valorisation sefydlu gwerth valse valse valses valse valuables pethau gwerthfawr valuation prisiant valuation list rhestr brisiant valuation lists rhestr brisiant valuation officer swyddog prisio valuation officers swyddog prisio valuations prisiant value gwerth value added tax treth ar werth (VAT) value added taxes treth ar werth (VAT) value base seiliau gwerth value for money gwerth eich arian value judgement barn ar werth value judgements barn ar werth value of a constant gwerth cysonyn value of the beat gwerth y curiad valuer prisiwr valuers prisiwr values gwerth valve falf valve clearance cliriad falf valve clearances cliriad falf valve instrument offeryn falf valve instruments offeryn falf valve seat eisteddle falf valve seats eisteddle falf valve trumpet utgorn falfiau valve trumpets utgorn falfiau valves falf vamp fampio vanadium fanadiwm (V) vanadiums fanadiwm (V) vandal fandal vandalism fandaliaeth vandalisms fandaliaeth vandals fandal vane asgell (of arrow) vane llafn (of turbine, feather etc) vanes asgell (of arrow) vanes llafn (of turbine, feather etc) vanguard blaengad vanguards blaengad vanish diflannu vanished diflan vanishing line llinell ddiflannol vanishing lines llinell ddiflannol vanishing point diflanbwynt vanishing points diflanbwynt vanity unit uned ymolchi vanity units uned ymolchi vaporization anweddiad vaporizations anweddiad vaporize anweddu vaporized anweddol vapour anwedd (water) vapour density dwysedd anwedd vapour pressure gwasgedd anwedd vapour pressures gwasgedd anwedd vapours anwedd (water) variable newidiol variable newidyn variable address cyfeiriad newidiol variable cost cost newidiol variable costs cost newidiol variable current cerrynt newidiol variable currents cerrynt newidiol variable field maes newidiol variable fields maes newidiol variable form ffurf amrywiol (=diverse types) variable forms ffurf amrywiol (=diverse types) variable length hyd newidiol variable length records cofnodion hyd newidiol variable lengths hyd newidiol variable overheads gorbenion newidiol variable resistor gwrthydd newidiol variable resistors gwrthydd newidiol variable star seren newidiol variable stars seren newidiol variable string llinyn newidiol variable strings llinyn newidiol variable type math newidiol variable types math newidiol variable word length hyd gair newidiol variable word lengths hyd gair newidiol variables newidyn variance amrywiant variances amrywiant variant amrywiolyn variants amrywiolyn variate amryweb variates amryweb variates amryweddau variation amrywiad variation of rhythm amrywiad rythm variation of tension amrywiad tyndra variation sonata sonata amrywiad variation sonatas sonata amrywiad variational amrywiadol variations amrywiad varied diet deiet amrywiol varied diets deiet amrywiol variegated leaf deilen fraith variegated leafs deilen fraith variegation brithedd variegations brithedd variety amrywiaeth variety of media amrywiaeth o gyfryngau varna varna varnas varna varnashramadharma varnashramadharma varnashramadharmas varnashramadharma varnish farnais varnish farneisio varnish finish gorffeniad farnais varnish finishs gorffeniad farnais varnished wedi'i farneisio varnished surface arwyneb farnais varnished surfaces arwyneb farnais varnishs farnais varve farf varves farf vary amrywio vary timing amrywio amseriad vascular fasgwlar vascular bundle sypyn fasgwlar vascular bundles sypyn fasgwlar vasculum fasgwlwm vasculums fasgwlwm vase ffiol vase shape siâp ffiol vase shapes siâp ffiol vases ffiol vasoconstriction fasogyfyngiad vasoconstrictions fasogyfyngiad vasoconstrictor fasogyfyngydd vasoconstrictors fasogyfyngydd vasodilation fasoymlediad vasodilations fasoymlediad vasodilator fasoymledydd vasodilators fasoymledydd vassal deiliad vassalage deiliadaeth ffiwdal vassalages deiliadaeth ffiwdal vassals deiliad vaudeville vaudeville vaudevilles vaudeville vault cromgell (of chamber) vault llofnaid (of jump) vault with a double beat llofnaid ddeuglap vault with foot assisting llofnaid milwr vaults cromgell (of chamber) vaults llofnaid (of jump) vavasour fafasor vavasours fafasor vector fector vector fectoru vector and bitmap graphics graffigwaith fector a didfap vector equation hafaliad fector vector equations hafaliad fector vector multiplication lluosiad fector vector multiplications lluosiad fector vector quantity mesur fector vectorial fectoraidd vectorize fectoreiddio vectors fector vee belt gwregys 'V' vee belts gwregys 'V' vee groove locking nut nyten gloi rhigol V vee groove locking nuts nyten gloi rhigol V vee-bit tongs gefel geg 'V' veer and back gwyro a gwrthwyro vegetable dye llifyn llysiau vegetable dyes llifyn llysiau vegetable fibre ffibr llysiau vegetable fibres ffibr llysiau vegetable glue glud llysiau vegetable glues glud llysiau vegetable oil olew llysiau vegetable oils olew llysiau vegetable origin tarddiad llysieuol vegetable origins tarddiad llysieuol vegetarian llysieuwr vegetarians llysieuwr vegetation llystyfiant vegetations llystyfiant vegetative reproduction atgynhyrchiad llystyfol vegetative reproductions atgynhyrchiad llystyfol vehicle cerbyd (=car, lorry etc) vehicle cludydd (=medium for suspending pigments etc) vehicles cerbyd (=car, lorry etc) vehicles cludydd (=medium for suspending pigments etc) vehicular traffic trafnidiaeth gerbydol vehicular traffics trafnidiaeth gerbydol vein gwythïen vein of ore gwythïen fwyn veiner erfyn cerfio ffurf U veiners erfyn cerfio ffurf U veins gwythïen velcro felcro veld ffeld velds ffeld vellum felwm vellum glaze gwydredd felwm vellum glazes gwydredd felwm vellum paper papur felwm vellum papers papur felwm vellums felwm velocity cyflymder (vector quantity) velocity / acceleration graph graff cyflymder / cyflymiad velocity / acceleration graphs graff cyflymder / cyflymiad velocity / time diagram diagram cyflymder / amser velocity / time diagrams diagram cyflymder / amser velocity diagram diagram cyflymder velocity diagrams diagram cyflymder velocity graph graff cyflymder velocity graphs graff cyflymder velocity of circulation cyflymder cylchrediad velocity ratio cymhareb cyflymder velour felôr velours felôr velvet melfed velvet board bwrdd melfed velvet boards bwrdd melfed velveteen melfedîn velveteens melfedîn velvets melfed venal llygredig venation gwythieniad (of a leaf) venations gwythieniad (of a leaf) vending-machine peiriant gwerthu vending-machines peiriant gwerthu vendor gwerthwr vendors gwerthwr veneer argaen veneer argaenu veneer board bwrdd argaen veneer boards bwrdd argaen veneer hammer morthwyl argaenu veneer hammers morthwyl argaenu veneer key allwedd argaen veneer pin pin argaen veneer pins pin argaen veneered chipboard bwrdd sglodion argaen veneered chipboards bwrdd sglodion argaen veneered ply door drws pren haenog veneered ply doors drws pren haenog veneered ply wood pren haenog wedi'i argaenu veneered ply woods pren haenog wedi'i argaenu veneers argaen venepuncture tynnu gwaed venereal disease clefyd gwenerol venereal diseases clefyd gwenerol venetian blind llen ddelltog venetian blinds llen ddelltog venison cig carw venisons cig carw vent agorfa (=opening in general) vent awyrell (for air circulation) vent awyrellu (for air circulation) vent twll bys (=finger hole of musical instrument) vent hole twll awyr vent holes twll awyr vent window ffenestr awyru vent windows ffenestr awyru ventifact carreg wyntraul ventifacts carreg wyntraul ventilate awyru ventilating fan gwyntyll awyru ventilating fans gwyntyll awyru ventilation awyriad ventilation brick bricsen awyru ventilation bricks bricsen awyru ventilation grill dellt awyru ventilation grills dellt awyru ventilation movement symudiad awyru ventilation movements symudiad awyru ventilation rate cyfradd anadlu ventilation rates cyfradd anadlu ventilations awyriad ventilator awyrydd (for ventilating a room etc) ventilator peiriant anadlu (=respirator) ventilators awyrydd (for ventilating a room etc) ventilators peiriant anadlu (=respirator) ventral fentrol ventral fin asgell fentrol ventral fins asgell fentrol ventral root gwreiddyn fentrol ventral roots gwreiddyn fentrol ventricle fentrigl ventricles fentrigl ventricular volume cyfaint fentriglaidd ventricular volumes cyfaint fentriglaidd vents agorfa (=opening in general) vents awyrell (for air circulation) vents twll bys (=finger hole of musical instrument) venture menter venture capital cyfalaf menter venture capitals cyfalaf menter ventures menter venule gwythiennig venules gwythiennig verbal geiriol verbal ability gallu geiriol verderer gwyrddmon verderers gwyrddmon verdict rheithfarn verdicts rheithfarn verdigris rhwd copr verge ymyl verges ymyl verglas glasrew verifiable gwiriadwy verisimilitude hygrededd verisimilitudes hygrededd vermiform llyngyraidd vermilion fermiliwn vermilions fermiliwn vermin fermin vernacular brodorol vernacular iaith frodorol vernaculars iaith frodorol vernal equinox cyhydnos y gwanwyn vernal equinoxes cyhydnos y gwanwyn vernalization gwanwyneiddiad vernalizations gwanwyneiddiad vernicle fernagl vernicles fernagl vernier fernier vernier callipers caliperau fernier vernier height gauge medrydd uchder fernier vernier height gauges medrydd uchder fernier vernier protractor onglydd fernier vernier protractors onglydd fernier vernier reading darlleniad fernier vernier readings darlleniad fernier vernier scale graddfa fernier vernier scales graddfa fernier verniers fernier verruca ferwca verrucas ferwca versatile amlbwrpas (of object) versatile amryddawn (of person) verse adnod (in Bible) verse pennill (in song etc) verse anthem anthem wersi verse anthems anthem wersi verses adnod (in Bible) verses pennill (in song etc) versine fersin versines fersin version fersiwn versions fersiwn vertebra fertebra vertebral fertebrol vertebral column asgwrn cefn vertebral columns asgwrn cefn vertebras fertebra vertebrate fertebraidd vertebrate fertebrat vertebrates fertebrat vertex fertig vertexes fertig vertical fertigol vertical axis echelin fertigol vertical blind llen stribed vertical blinds llen stribed vertical boring borio fertigol vertical branch pipe peipen gangen fertigol vertical branch pipes peipen gangen fertigol vertical buttonhole twll botwm fertigol vertical buttonholes twll botwm fertigol vertical centre line llinell ganol fertigol vertical centre lines llinell ganol fertigol vertical centring canoli fertigol vertical chiselling naddu fertigol vertical control rheolaeth fertigol vertical controls rheolaeth fertigol vertical exaggeration gormodaeth fertigol vertical exaggerations gormodaeth fertigol vertical feed porthiant fertigol vertical feeds porthiant fertigol vertical force grym fertigol vertical forces grym fertigol vertical grouping grwpio fertigol vertical height uchder fertigol vertical heights uchder fertigol vertical integration integreiddiad fertigol vertical integrations integreiddiad fertigol vertical interval cyfwng fertigol vertical intervals cyfwng fertigol vertical line llinell fertigol vertical lines llinell fertigol vertical milling machine peiriant melino fertigol vertical milling machines peiriant melino fertigol vertical mortise lock clo mortais fertigol vertical mortise locks clo mortais fertigol vertical paring naddu fertigol vertical perspective persbectif fertigol vertical perspectives persbectif fertigol vertical photograph ffotograff fertigol vertical photographs ffotograff fertigol vertical plane plân fertigol (V.P.) vertical planes plân fertigol (V.P.) vertical projection line llinell dafluniadol fertigol vertical projection lines llinell dafluniadol fertigol vertical pug mill melin gleio fertigol vertical pug mills melin gleio fertigol vertical ruler hydlin vertical rulers hydlin vertical section toriad fertigol vertical sections toriad fertigol vertical stripe rhes fertigol vertical stripes rhes fertigol vertical trace olin fertigol vertical traces olin fertigol verticality fertigoledd vertically opposite angles onglau croesfertigol vertices of a rectangle fertigau petryal very difficult anodd iawn very fine grit grit mân iawn very fine grits grit mân iawn very large scale integration cyfannu graddfa eang iawn (VLSI) vesicular cavity ceudod pothellog vesper gosber vespers gosber vessel llestr vessels llestr vest fest vestibule cyntedd vestibules cyntedd vestigial organ organ gweddilliol vestigial organs organ gweddilliol vestment urddwisg vestments urddwisg vestry festri vests fest veto pleidlais atal viability hyfywdra viable dichonadwy (of plan etc) viable hyfyw (of living thing) viaduct traphont viaducts traphont vibraphone fibraffon vibraphones fibraffon vibrate dirgrynu vibrating dirgrynol vibrating reed brwynen ddirgrynol vibrating reeds brwynen ddirgrynol vibration dirgryniad vibration wave ton ddirgrynol vibration waves ton ddirgrynol vibrational dirgrynol vibrations dirgryniad vibrato vibrato vibratory dirgrynol vicar ficer vicar-choral ficer corawl vicar-chorals ficer corawl vicar-general ficer cyffredinol vicar-generals ficer cyffredinol vicarage ficerdy vicarages ficerdy vicariate ficeriaeth vicariates ficeriaeth vicarious dirprwyol vicarious liability atebolrwydd dirprwyol vicars ficer vice feis vice clamps arbedion feis vice jaw safn feis vice jaws safn feis vice-admiral is-lyngesydd vice-admirals is-lyngesydd vice-consul is-gonswl vice-consuls is-gonswl viceroy rhaglaw vices feis victim dioddefwr victim survey arolwg dioddefwyr victimisation erledigaeth victimisations erledigaeth victims dioddefwr victorious buddugoliaethus victory buddugoliaeth video fideo video clip clip fideo video clips clip fideo video extract darn o glip fideo video extracts darn o glip fideo video nasty fideo ffiaidd video production cynhyrchiad fideo video productions cynhyrchiad fideo video programme rhaglen fideo video programmes rhaglen fideo video recording recordiad fideo video recordings recordiad fideo video rental store siop rhentu fideos video rental stores siop rhentu fideos video renting shop siop llogi fideos video renting shops siop llogi fideos video shop siop fideo video shops siop fideo video still camera camera fideo unllun video still cameras camera fideo unllun videoscope fideosgop videoscopes fideosgop view golwg (=sight of something) view golygfa (=scene) view mode modd gweld view modes modd gweld view of frankpledge cwrt tangwystl viewdata gweldata viewed from X yn edrych o gyfeiriad X viewpoint safbwynt viewpoints safbwynt views golwg (=sight of something) views golygfa (=scene) vigorous egnïol vigorous activity gweithgarwch egnïol vihara vihara viharas vihara villa fila village pentref villages pentref villainy anfadwaith villas fila villein bilain villeinage bileiniaeth villeinages bileiniaeth villeins bilain villus filws vine charcoal siarcol gwinwydd vine charcoals siarcol gwinwydd vinegar finegr vinegars finegr vinyl finyl vinyl polymer polymer finyl vinyl polymers polymer finyl vinyl resin resin finyl vinyl resins resin finyl vinyl tile teilsen finyl vinyl tiles teilsen finyl vinyl wallpaper papur finyl vinyl wallpapers papur finyl vinyls finyl viol feiol viol player feiolydd viol players feiolydd viola da gamba viola da gamba viola da gamba player chwaraewr viola da gamba viola da gamba players chwaraewr viola da gamba viola da gambas viola da gamba viola player fiolydd viola players fiolydd violate halogi (a temple) violate torri (a law) violate treisio (a woman) violate troseddu yn erbyn (convention) violence trais violences trais violent treisgar violin feiolin violinist feiolinydd violinists feiolinydd violins feiolin violoncellist sielydd violoncellists sielydd viols feiol vipassana vipassana vipassanas vipassana viral firaol virement hawl trosglwyddo arian virements hawl trosglwyddo arian virgate firgat virgates firgat virgin gwyryf virgin birth geni o forwyn virgin lands tiroedd newydd (USSR) virginalist firdsinalydd virginalists firdsinalydd virginals firdsinal (=musical instrument) virgins gwyryf viridian firidian viridians firidian virology firoleg virtual rhith (in computing) virtual image rhithddelwedd virtual images rhithddelwedd virtual machine rhithbeiriant virtual machines rhithbeiriant virtual work rhith-waith virtual works rhith-waith virtue rhinwedd virtues rhinwedd virus firws virus checking gwirio firysau virus checking software meddalwedd gwirio firysau virus checking softwares meddalwedd gwirio firysau viscera ymysgaroedd visceral organs organau perfeddol viscose fiscos viscose rayon reion fiscos viscose rayons reion fiscos viscoses fiscos viscosity gludedd viscount is-iarll viscounts is-iarll viscous gludiog visibility gwelededd visible gweladwy visible light golau gweladwy visible lights golau gweladwy vision golwg (=sight) vision gweledigaeth (=foresight) visionary breuddwydiol visionary gweledydd visions golwg (=sight) visions gweledigaeth (=foresight) visit ymweld â visitation ymweliad visitations ymweliad visitor ymwelydd visitor attraction atyniad i ymwelwyr visitor attractions atyniad i ymwelwyr visitors ymwelydd vista golygfa vistas golygfa visual gweledol visual aid cymhorthyn gweledol visual aids cymhorthyn gweledol visual axis echelin weledol visual concept cysyniad gweledol visual concepts cysyniad gweledol visual display unit uned arddangos weledol (VDU) visual display units uned arddangos weledol (VDU) visual evidence tystiolaeth weledol visual evidences tystiolaeth weledol visual image delwedd weledol visual images delwedd weledol visual impairment nam ar y golwg visual impairments nam ar y golwg visual language iaith weledol visual languages iaith weledol visual nature natur weledol visual natures natur weledol visual note nodiad gweledol visual notes nodiad gweledol visual purple porffor gweledol visual purples porffor gweledol visual sign arwydd gweledol visual signs arwydd gweledol visual stimulation ysgogiad gweledol visual stimulations ysgogiad gweledol visual stimulus ysgogiad gweledol visualize delweddu visually pleasing dymunol yr olwg visuo-motor ability gallu gweld-echddygol vital capacity cyfaint anadlol (of lungs) vital organ organ hanfodol vital organs organ hanfodol vital signs arwyddion bywyd vital statistics ystadegau bywyd vitamin fitamin vitamin C fitamin C vitamin deficiency prinder fitamin vitamin drop defnyn fitamin vitamin drops defnyn fitamin vitamin supplement fitaminau atodol vitamins fitamin viticulture gwinwyddaeth viticultures gwinwyddaeth vitreous gwydrog vitreous enamel enamel gwydrog vitreous enamels enamel gwydrog vitreous humour hylif gwydrog vitreous humours hylif gwydrog vitrifiable gwydreiddiadwy vitrifiable clay clai gwydreiddiadwy vitrified gwydredig vitrify troi'n wydr vitriol fitriol vitriols fitriol viva voce viva voce vivid llachar vivid colour lliw llachar vivid colours lliw llachar viviparity bywesgoredd viviparous bywesgorol vivisection bywddyraniad vivisections bywddyraniad vocabulary geirfa vocal lleisiol vocal advice cyngor lleisiol vocal advices cyngor lleisiol vocal cords tannau llais vocal interpretation dehongliad lleisiol vocal interpretations dehongliad lleisiol vocal music cerddoriaeth leisiol vocal musics cerddoriaeth leisiol vocal part rhan leisiol vocal parts rhan leisiol vocal range cwmpas lleisiol vocal ranges cwmpas lleisiol vocal technique techneg leisiol vocal techniques techneg leisiol vocalize lleisio vocation galwedigaeth vocational galwedigaethol vocational counselling cynghori galwedigaethol vocational education addysg alwedigaethol vocational educations addysg alwedigaethol vocational test prawf galwedigaethol vocational tests prawf galwedigaethol vocational training hyfforddiant galwedigaethol vocational trainings hyfforddiant galwedigaethol vocations galwedigaeth vogue ffasiwn vogues ffasiwn voice llais voice data entry cofnodi data llais (VDE) voice production cynhyrchu'r llais voiceover troslais voiceover trosleisio voiceovers troslais voices llais voicing lleisio void di-rym voile voile voiles voile volatile anweddol (in chemistry) volatile cyfnewidiol (=flighty) volatile ehedol (in cooking) volatile hedegog (in technology) volatility anweddolrwydd volcanic folcanig volcanic activity gweithgaredd folcanig volcanic ash lludw folcanig volcanic ashs lludw folcanig volcanic bomb bom folcanig volcanic bombs bom folcanig volcanic breccia breccia folcanig volcanic breccias breccia folcanig volcanic cinders marwor folcanig volcanic cone côn folcanig volcanic cones côn folcanig volcanic crater crater folcanig volcanic craters crater folcanig volcanic dome cromen folcanig volcanic domes cromen folcanig volcanic dust llwch folcanig volcanic dusts llwch folcanig volcanic eruption echdoriad folcanig volcanic eruptions echdoriad folcanig volcanic filler llenwad folcanig volcanic fillers llenwad folcanig volcanic hazard perygl folcanig volcanic hazards perygl folcanig volcanic mud llaid folcanig volcanic muds llaid folcanig volcanic neck gwddf folcanig volcanic necks gwddf folcanig volcanic pipe pibell folcanig volcanic pipes pibell folcanig volcanic plug plwg folcanig volcanic plugs plwg folcanig volcanic spine nodwydd folcanig volcanic spines nodwydd folcanig volcanicity folcanigrwydd volcanism folcanigrwydd volcanisms folcanigrwydd volcano llosgfynydd volley foli volley folïo volley ball pêl foli volley balls pêl foli volt folt voltage foltedd voltage amplifier mwyhadur foltedd voltage amplifiers mwyhadur foltedd voltage comparator cymharydd foltedd voltage comparators cymharydd foltedd voltage divider rhannydd foltedd voltage dividers rhannydd foltedd voltage gain cynnydd mewn foltedd voltage gains cynnydd mewn foltedd voltage source ffynhonnell foltedd voltage sources ffynhonnell foltedd voltages foltedd voltameter foltamedr voltameters foltamedr voltmeter foltmedr voltmeters foltmedr volts folt volume cyfaint (=measurement) volume cyfrol (of a book) volume llais (=fullness of tone) volume sŵn (=noise) volume of solids cyfaint solidau volumes cyfaint (=measurement) volumes cyfrol (of a book) volumes llais (=fullness of tone) volumes sŵn (=noise) volumetric cyfeintiol volumetric flask fflasg safonol volumetric flasks fflasg safonol volumetric work gwaith cyfeintiol volumetric works gwaith cyfeintiol voluntarism gwirfoddoliaeth voluntarisms gwirfoddoliaeth voluntary gwirfoddol voluntary offrymddarn voluntary action gweithred wirfoddol voluntary actions gweithred wirfoddol voluntary admission derbyniad gwirfoddol voluntary admissions derbyniad gwirfoddol voluntary care gofal gwirfoddol voluntary carer gofalydd gwirfoddol voluntary carers gofalydd gwirfoddol voluntary cares gofal gwirfoddol voluntary controlled school ysgol wirfoddol dan reolaeth voluntary controlled schools ysgol wirfoddol dan reolaeth voluntary education addysg wirfoddol voluntary educations addysg wirfoddol voluntary muscle cyhyr rheoledig voluntary muscles cyhyr rheoledig voluntary organization mudiad gwirfoddol voluntary organizations mudiad gwirfoddol voluntary redundancy colli gwaith yn wirfoddol voluntary school ysgol wirfoddol voluntary schools ysgol wirfoddol voluntary sector sector gwirfoddol voluntary sectors sector gwirfoddol voluntary service gwasanaeth gwirfoddol voluntary services gwasanaeth gwirfoddol volunteer gwirfoddolwr volunteers gwirfoddolwr vomit chwyd vomit chwydu vomits chwyd vortex fortecs vortexes fortecs vorticist forteisydd vorticists forteisydd vorticity forteisedd vote pleidlais vote pleidleisio vote of censure pleidlais gerydd votes pleidlais voting by proxy pleidleisio dirprwyol votive mass offeren addunedol votive offering offrwm addunedol votive offerings offrwm addunedol voucher taleb vouchers taleb vox pop vox pop vox pops vox pop vulcanicity fwlcanigrwydd vulcanize fwlcaneiddio vulcanology fwlcanoleg vulgar fraction ffracsiwn cyffredin vulgar fractions ffracsiwn cyffredin vulnerable archolladwy vulva of woman fwlfa wad box blwch wad wad boxes blwch wad wadding wadin waddings wadin wadi wadi wadis wadi waffle pattern patrwm waffl waffle patterns patrwm waffl wage cyflog wages cyflog wagon chamfer siamffer wagen wagon chamfers siamffer wagen wainscot wensgot waist gwasg waist slip pais wasg waist slips pais wasg waist tie cwlwm gwasg waist ties cwlwm gwasg waistband band gwasg waistbands band gwasg waistcoat gwasgod waistcoats gwasgod waistline llinell wasg waistlines llinell wasg waists gwasg waiting list rhestr aros waiting lists rhestr aros waiting room ystafell aros waiting rooms ystafell aros waiting time amser aros waiting times amser aros waits carolwyr wake gwylnos (in Ireland) wake ôl llong (of ship) wakes gwylnos (in Ireland) wakes ôl llong (of ship) walk cerdded walk backwards cerdded wysg y cefn walker ffrâm gerdded walkers ffrâm gerdded walking stick ffon walking sticks ffon wall mur (in formal usage) wall wal (in modern, every day usage) wall bar bar wal wall bars bar wal wall cladding cladin wal wall claddings cladin wal wall display arddangosfa mur wall hanging croglun wall hangings croglun wall light golau wal wall lights golau wal wall panel panel wal wall panels panel wal wall plaque plac mur wall plaques plac mur wall-attachment device dyfais gydio wrth wal wall-attachment devices dyfais gydio wrth wal wall-hanging unit uned i'w hongian wall-hanging units uned i'w hongian wall-painting murlun wall-paintings murlun wall-thickness trwch wal (of pipe) walled muriog walled town tref gaerog walled towns tref gaerog wallet waled wallets waled wallpaper papur wal wallpaper papuro wallpapers papur wal wallplate gwarblat wallplates gwarblat walls mur (in formal usage) walls wal (in modern, every day usage) walnut cneuen Ffrengig walnuts cneuen Ffrengig walrus walrws waltz waltsio wander crwydro wandering cell cell grwydrol wandering cells cell grwydrol waney edge ymyl ddi-lif waney edges ymyl ddi-lif waning trai waning of the moon lleuad ar ei chil wanings trai wants chwenychiadau (of consumers) war rhyfel war axe bwyell ryfel war axes bwyell ryfel war communism comiwnyddiaeth ryfel war communisms comiwnyddiaeth ryfel war crime trosedd ryfel war crimes trosedd ryfel war crimes trial achos llys troseddau rhyfel war crimes trials achos llys troseddau rhyfel war criminal troseddwr rhyfel war criminals troseddwr rhyfel war guilt euogrwydd rhyfel war guilts euogrwydd rhyfel war lord arglwydd rhyfel war lords arglwydd rhyfel warbler telor warblers telor ward ward wardenship gwardeiniaeth wardenships gwardeiniaeth warding wardio warding file ffeil wardio warding files ffeil wardio wardrobe wardrob wardrobes wardrob wards ward wardship gwardiaeth wardships gwardiaeth ware crochenwaith (of ceramics) warehouse warws warehouses warws wares crochenwaith (of ceramics) warfare rhyfela warhead pen ffrwydrol warheads pen ffrwydrol warm cynhesu warm cynnes warm air aer cynnes (central heating system) warm airs aer cynnes (central heating system) warm blooded animal anifail gwaed cynnes warm blooded animals anifail gwaed cynnes warm colour lliw cynnes warm colours lliw cynnes warm front ffrynt cynnes warm fronts ffrynt cynnes warm iron haearn cynnes warm irons haearn cynnes warm sector sector cynnes warm sectors sector cynnes warm temperate tymherus cynnes warm temperate zone cylchfa dymherus gynnes warm temperate zones cylchfa dymherus gynnes warm tone tôn cynnes (of colour) warm tones tôn cynnes (of colour) warm up cynhesu warm up activity gweithgaredd cynhesu warm up exercise ymarfer ystwytho warm up exercises ymarfer ystwytho warm up movement symudiad ystwytho warm up movements symudiad ystwytho warm up the muscles cynhesu cyhyrau warm-up ymgynhesu warming house ystafell gynhesu warming houses ystafell gynhesu warmonger rhyfelgi warmongers rhyfelgi warmth cynhesrwydd warmths cynhesrwydd warn rhybuddio warning rhybudd warning colouration lliwiad rhybuddiol warning colourations lliwiad rhybuddiol warnings rhybudd warp camdroad (in wood) warp camdroi (wood) warp crychiad (of land, in geography) warp crychu (of land, in geography) warp ystof (of threads on loom) warp ystofi (textiles) warp and weft ystof ac anwe warp board bwrdd ystofi warp boards bwrdd ystofi warp grain graen ystof warp grains graen ystof warp stick ffon ystofi warp sticks ffon ystofi warp thread edau ystof warp threads edau ystof warp-weighted loom gwŷdd pwysau warp-weighted looms gwŷdd pwysau warpage ystofiad warpages ystofiad warping camdroad (=distortion) warping clamp clamp ystofi warping clamps clamp ystofi warping frame ffrâm ystofi warping frames ffrâm ystofi warping post postyn ystofi warping posts postyn ystofi warpings camdroad (=distortion) warpland crychdir warplands crychdir warps camdroad (in wood) warps crychiad (of land, in geography) warps ystof (of threads on loom) warrant gwarant warrant officer swyddog gwarant warrant officers swyddog gwarant warrants gwarant warranty gwarant warren cwningar warrens cwningar warrior rhyfelwr warriors rhyfelwr wars of Scottish independence rhyfeloedd dros annibyniaeth yr Alban wart dafaden warts dafaden wash golch wash golchi wash basin basn ymolchi wash basins basn ymolchi wash code cod golchi wash codes cod golchi wash slope golch-lethr wash slopes golch-lethr wash tub symbol symbol twb golchi wash tub symbols symbol twb golchi wash-drawing golchlun wash-drawings golchlun washability golchadwyaeth washable golchadwy washable wallpaper papur golchadwy washable wallpapers papur golchadwy washer wasier washers wasier washing cycle cylchred olchi washing cycles cylchred olchi washing machine peiriant golchi washing machines peiriant golchi washing powder powdr golchi washing powders powdr golchi washing process proses olchi washing products nwyddau golchi washing programme rhaglen olchi washing programmes rhaglen olchi washing soda soda golchi washing sodas soda golchi washing solution hydoddiant golchi washing solutions hydoddiant golchi washs golch wasp gwenynen feirch wasps gwenynen feirch waste gorest (land) waste gwastraff waste gwastraffu waste disposal gwaredu sbwriel waste land tir diffaith waste lands tir diffaith waste material defnydd gwastraff waste materials defnydd gwastraff waste mould mowld gwastraff waste moulds mowld gwastraff waste product isgynnyrch diwerth waste products isgynnyrch diwerth waste side ochr wastraff (of line) waste sides ochr wastraff (of line) waste wood pren gwastraff waste woods pren gwastraff waste-disposal unit uned gwaredu sbwriel waste-disposal units uned gwaredu sbwriel waste-mantle caen erydion waste-mantles caen erydion wastes gorest (land) wastes gwastraff wasting process proses wastraffu watch the ball gwylio'r bêl watch-glass gwydryn oriawr watchman gwyliwr watchmans gwyliwr water dyfrhau water dŵr water attracting molecule moleciwl sy'n atynnu dŵr water attracting molecules moleciwl sy'n atynnu dŵr water bath baddon dŵr water baths baddon dŵr water circulation dŵr cylchredol (central heating system) water circulations dŵr cylchredol (central heating system) water cistern seston ddŵr water cisterns seston ddŵr water closet closed dŵr water closet toiled water closets closed dŵr water closets toiled water colour dyfrlliw water colour brush brwsh dyfrlliw water colour brushs brwsh dyfrlliw water colour painting paentiad dyfrlliw (of painted picture) water colour painting peintio dyfrlliw (of process or art) water colour paintings paentiad dyfrlliw (of painted picture) water colour paper papur dyfrlliw water colour papers papur dyfrlliw water colours dyfrlliw water content cynhwysiad dŵr water contents cynhwysiad dŵr water course cwrs dŵr water courses cwrs dŵr water cress berwr dŵr water culture dwrfeithriniad water cultures dwrfeithriniad water cycle cylchred ddŵr water cycles cylchred ddŵr water deficit diffyg dŵr water deficits diffyg dŵr water dispersal gwasgariad gan ddŵr water dispersals gwasgariad gan ddŵr water extraction echdynnu dŵr water features arweddion dŵr water frame ffrâm ddŵr water frames ffrâm ddŵr water gas nwy dŵr water glass dŵr silicad water hole pwll dŵr water holes pwll dŵr water level lefel dŵr water levels lefel dŵr water management rheoli dŵr water meadow llifddol water meadows llifddol water of crystallization dŵr grisialu water parting gwahanfa ddŵr water partings gwahanfa ddŵr water paste past dŵr water pastes past dŵr water plant planhigyn dŵr water plants planhigyn dŵr water potential potensial dŵr water potentials potensial dŵr water repelling molecule moleciwl sy'n gwrthyrru dŵr water repelling molecules moleciwl sy'n gwrthyrru dŵr water sac coden ddŵr water sacs coden ddŵr water safety diogelwch yn y dŵr water softener meddalydd dŵr water softeners meddalydd dŵr water stain staen dŵr water stains staen dŵr water supply cyflenwad dŵr water survival goroesi yn y dŵr water table lefel trwythiad water tables lefel trwythiad water treatment trin dŵr water vapour anwedd dŵr water vapours anwedd dŵr water vascular system system fasgwlar ddyfrol water vascular systems system fasgwlar ddyfrol water vole llygoden y dŵr water voles llygoden y dŵr water wheel rhod ddŵr water wheels rhod ddŵr water work gwaith dŵr water works gwaith dŵr water-based dyfrsail (in technical usage) water-based activity gweithgaredd dŵr water-based emulsion polish llathr emwlsiwn dŵr water-based emulsion polishs llathr emwlsiwn dŵr water-based medium cyfrwng sylfaen ddŵr water-based mediums cyfrwng sylfaen ddŵr water-heater gwresogydd dŵr water-heaters gwresogydd dŵr water-polo polo'r dŵr water-repellent gwrth-ddŵr water-resistant dŵr-wrthiannol water-softening plant cyfarpar meddalu dŵr water-softening plants cyfarpar meddalu dŵr waterfall rhaeadr waterfalls rhaeadr watering place dyfrfan watering places dyfrfan waterlogged dwrlawn waterlogged dyfrlawn watermark dyfrnod watermarks dyfrnod waterproof diddos (=snug from the weather) waterproof diddosi waterproof dressing gorchudd dal dŵr waterproof dressings gorchudd dal dŵr waterproof ink inc gwrth-ddŵr waterproof inks inc gwrth-ddŵr waterproof paper papur gwrth-ddŵr waterproof papers papur gwrth-ddŵr waterproof sheet cynfas dal dŵr waterproof sheets cynfas dal dŵr waters dŵr watershed gwahanfa ddŵr watersheds gwahanfa ddŵr waterspout colofn ddŵr waterspouts colofn ddŵr watertight dwrglos waterway dyfrffordd watt wat (W) wattage watedd wattages watedd wattle and daub plethwaith a chlai wattle fence ffens bleth wattle fences ffens bleth watts wat (W) wave seindon (of sound) wave ton wave machine peiriant tonnau wave machines peiriant tonnau wave mechanics tonfecaneg wave motion mudiant ton wave motions mudiant ton wave refraction plygiant tonnau wave refractions plygiant tonnau wave-cut platform llyfndir tonnau wave-cut platforms llyfndir tonnau wave-front blaendon wave-fronts blaendon waveform tonffurf waveforms tonffurf wavelength tonfedd wavelength of a wave tonfedd ton wavelengths tonfedd wavelet tonnell wavelets tonnell waves seindon (of sound) waves ton wavy tonnog wavy grain graen tonnog wavy grains graen tonnog wax cwyr wax crayon creon cwyr wax crayons creon cwyr wax finish gorffeniad cwyr wax finishs gorffeniad cwyr wax painting peintio cwyr (of process or art) wax paper papur cwyr wax papers papur cwyr wax pastel pastel cwyr wax pastels pastel cwyr wax polish llathredd cwyr (shine) wax polish llathrydd cwyr (material) wax polishs llathredd cwyr (shine) wax polishs llathrydd cwyr (material) wax resistant gwrth-gwyr wax shine llathredd cwyr wax shines llathredd cwyr wax varnish farnais cwyr wax varnishs farnais cwyr wax-resist decoration addurn gwrthgwyr wax-resist decorations addurn gwrthgwyr waxing cwyro waxing and waning cynnydd a chiliad waxing of the moon lleuad ar ei chynnydd waxy cwyraidd waxy surface arwyneb cwyraidd waxy surfaces arwyneb cwyraidd way leave hawl tramwy way leaves hawl tramwy weak gwan weak acid asid gwan weak acids asid gwan weak base bas gwan weak bases bas gwan weak field ligand ligand maes gwan weak field ligands ligand maes gwan weaker side ochr wanaf weaker sides ochr wanaf weakly singular hynod wannaidd weakness gwendid wealth cyfoeth wealth tax treth ar gyfoeth wealth taxes treth ar gyfoeth wealths cyfoeth wean diddyfnu weapon arf weapon focus ffocws arf weapon hand llaw'r arf weapon hands llaw'r arf weapons arf wear traul wear and tear traul a gwisgo wears traul weasel gwenci weasels gwenci weather tywydd weather board bwrdd hindraul (bargeboard) weather boards bwrdd hindraul (bargeboard) weather forecast rhagolygon y tywydd weather forecaster dyn y tywydd (male and in general) weather forecaster merch y tywydd (female) weather forecasters dyn y tywydd (male and in general) weather forecasters merch y tywydd (female) weather map map tywydd weather maps map tywydd weather pattern patrwm y tywydd weather patterns patrwm y tywydd weather report adroddiad tywydd weather reports adroddiad tywydd weathered hindreuliedig weathering hindreuliad weathering hindreulio weathering agent cyfrwng hindreulio weathering agents cyfrwng hindreulio weatherings hindreuliad weathers tywydd weave gwehyddiad weave gwehyddu weave in and out plethu (in dancing) weaver gwehydd weavers gwehydd weaves gwehyddiad weaving gwau drwy'r gwŷdd (in Lord of Caernarfon dance) weaving gwau igam-ogam (in Oswestry Wake) weaving cotton cotwm sglein weaving cottons cotwm sglein weaving dance dawns weu weaving dances dawns weu weaving pattern patrwm gwehyddu weaving patterns patrwm gwehyddu weaving shuttle gwennol y gwehydd weaving shuttles gwennol y gwehydd web gwe web site address cyfeiriad gwefan web site still image delwedd lonydd gwefan web site still images delwedd lonydd gwefan web site video clip clip fideo gwefan web site video clips clip fideo gwefan web style arddull gwe web styles arddull gwe webbed gweog webbing webin webbing stretcher estynnwr webin webbing stretchers estynnwr webin webbings webin weber weber webers weber wedge lletem wedge lletemu wedged wedi'i letemu (with masculine nouns) wedged wedi'i lletemu (with feminine nouns) wedged tenon tyno wedi'i letemu wedged tenons tyno wedi'i letemu wedges lletem wedging lletemiad wedgings lletemiad weed chwynnyn weeds chwynnyn weekly wash golch wythnosol weekly washs golch wythnosol weekwork wythnoswaith weekworks wythnoswaith weft anwe weft grain graen anwe weft grains graen anwe weft thread edau anwe weft threads edau anwe wefts anwe weigh pwyso weigh in pwyso weighbridge pont bwyso weighbridges pont bwyso weighed wedi'i bwyso (with masculine nouns) weighed wedi'i phwyso (with feminine nouns) weighman pwyswr weighmans pwyswr weight pwysau (in general) weight pwysyn (=object for weighing) weight training hyfforddiant gyda phwysau weight trainings hyfforddiant gyda phwysau weighted pwysol weighted average cyfartaledd pwysol weighted averages cyfartaledd pwysol weighted mean cymedr pwysol weighted means cymedr pwysol weighting pwysiad weightings pwysiad weightlifting codi pwysau weights pwysyn (=object for weighing) weir cored weirs cored weld weldiad weld weldio weld line llinell weldio weld lines llinell weldio welding rod rhoden weldio welding rods rhoden weldio welding torch tortsh weldio welding torches tortsh weldio welds weldiad welfare lles welfare food bwyd lles welfare foods bwyd lles welfare loss colled les welfare officer swyddog lles welfare officers swyddog lles welfare payment taliad lles welfare payments taliad lles welfare state gwladwriaeth les welfare states gwladwriaeth les welfares lles well man clinic clinig dynion iach well man clinics clinig dynion iach well of bench cafn mainc well woman clinic clinig merched iach well woman clinics clinig merched iach well-balanced cytbwys well-being lles well-beings lles well-defined clir-ddiffiniedig well-groomed graenus (=carefully tended) well-groomed trwsiadus (of dress etc) well-known adnabyddus well-proportioned cymesur (=symmetrical) well-proportioned o gyfrannedd da (in art etc) well-proportioned drawing lluniad o gyfrannedd da well-proportioned drawings lluniad o gyfrannedd da well-proportioned sketch braslun o gyfrannedd da well-proportioned sketches braslun o gyfrannedd da welshry brodoriaeth welt gwald welt pocket poced wald welt pockets poced wald welter weight pwysau welter welts gwald west gorllewin westerlies gwyntoedd y gorllewin western margins glandiroedd gorllewinol westernization gorllewiniad westernizations gorllewiniad westernize gorllewino westing gorllewiniad westings gorllewiniad wests gorllewin wet gwlyb wet and dry gwlyb a sych wet and dry paper papur gwlyb a sych wet and dry papers papur gwlyb a sych wet bulb thermometer thermomedr bwlb gwlyb wet bulb thermometers thermomedr bwlb gwlyb wet media cyfryngau gwlyb wet rot gwlyb-bydredd wet rots gwlyb-bydredd wet spin gwlybnyddu wet weather tywydd gwlyb wet weathers tywydd gwlyb wetting gwlychu wetting agent cyfrwng gwlychu wetting agents cyfrwng gwlychu wetting power pŵer gwlychu wetting powers pŵer gwlychu whale morfil whale back cefn morfil whale backs cefn morfil whales morfil wharf cei wharfs cei wheatmeal bread bara gwenith wheatmeal breads bara gwenith wheatmeal flour blawd bywyn gwenith wheatmeal flours blawd bywyn gwenith wheel olwyn wheel olwyno wheel castor castor olwyn wheel castors castor olwyn wheel dresser erfyn trin olwyn wheel dressers erfyn trin olwyn wheel dressing trin olwyn wheel of fortune pattern patrwm olwyn ffawd wheel-back chair cadair gefn olwyn wheel-back chairs cadair gefn olwyn wheelbarrow berfa wheelbarrows berfa wheelbrace carntro olwyn wheelbraces carntro olwyn wheelchair cadair olwyn wheelchairs cadair olwyn wheeling the scrummage olwyno'r sgrym wheels olwyn wheelwright saer troliau wheelwrights saer troliau wheezing gwichian whet hogi whetstone carreg hogi whetstones carreg hogi whip chwip (in general) whip chwipio whip ysgogiad (as in a long shaft or beam) whip a hem chwipio hem whipping cream hufen chwipio whipping creams hufen chwipio whipping stitch pwyth chwipio whipping stitches pwyth chwipio whips chwip (in general) whips ysgogiad (as in a long shaft or beam) whirl chwyrlïad whirl chwyrlïo whirler chwyrlïwr whirlers chwyrlïwr whirling wheel olwyn chwyrlïo whirling wheels olwyn chwyrlïo whirlpool trobwll whirlpools trobwll whirls chwyrlïad whirlwind chwyrlwynt whirlwinds chwyrlwynt whisking method dull chwisgio whisking methods dull chwisgio whisper sibrwd whispers sibrwd whistle chwiban whistle chwibanu whistles chwiban whistling sand tywod sïo whistling sands tywod sïo white gwyn (enamelling colour) white apron ffedog wen white aprons ffedog wen white blood cell cell wen y gwaed white blood cells cell wen y gwaed white board bwrdd gwyn white boards bwrdd gwyn white bread bara gwyn white breads bara gwyn white cardboard cardbord gwyn white cardboards cardbord gwyn white chalk sialc gwyn white chalks sialc gwyn white check banding bandin siec gwyn white check bandings bandin siec gwyn white collar worker gweithiwr swyddfa white collar workers gweithiwr swyddfa white dune twyn gwyn white dunes twyn gwyn white foundation gwyn sylfaenol white foundations gwyn sylfaenol white heat gwres gwynias white heats gwres gwynias white jumper siwmper wen white jumpers siwmper wen white light golau gwyn white lights golau gwyn white line llinell wen white lines llinell wen white man's burden baich y dyn gwyn white man's burdens baich y dyn gwyn white matter gwynnin (brain) white matters gwynnin (brain) white metal alloy aloi metel gwyn white meter mesurydd gwyn white meters mesurydd gwyn white monk mynach gwyn white monks mynach gwyn white paste past gwyn white pastes past gwyn white shellac sielac gwyn white shellacs sielac gwyn white spirit gwirod gwyn white spirits gwirod gwyn white supremacy goruchafiaeth y dyn gwyn white tissue paper papur sidan gwyn white tissue papers papur sidan gwyn white-cast iron haearn bwrw gwyn (ferrous metal) white-cast irons haearn bwrw gwyn (ferrous metal) white-collar worker gweithiwr coler wen white-collar workers gweithiwr coler wen whitefly pryf gwyn whiten gwynnu whitener gwynnydd whiteners gwynnydd whites gwyn (enamelling colour) whitewood pren gwyn whitewoods pren gwyn whiting powdr sialc whitings powdr sialc whitlow ffelwm whitlows ffelwm whittle naddu whole consort consort offerynnau tebyg whole consorts consort offerynnau tebyg whole curriculum cwricwlwm cyflawn whole curriculums cwricwlwm cyflawn whole number rhif cyfan whole numbers rhif cyfan whole school policy polisi ysgol gyfan whole-number system system rhifau cyfain whole-number systems system rhifau cyfain wholemeal bread bara cyflawn wholemeal breads bara cyflawn wholesale cyfanwerth wholesale and retail distribution dosbarthu cyfanwerth ac adwerth wholesale market marchnad gyfanwerthu wholesale markets marchnad gyfanwerthu wholesale store siop gyfanwerthu wholesale stores siop gyfanwerthu wholesaler cyfanwerthwr wholesalers cyfanwerthwr wholesales cyfanwerth whooping cough pas, y (pertussis) whooping coughs pas, y (pertussis) whorl sidell whorled sidellog whorls sidell wicker gwiail wickerwork basgedwaith wickerworks basgedwaith wicket wiced wicket-keeper wicedwr wicket-keepers wicedwr wickets wiced wide llydan wide area ardal eang (WAN) wide area network rhwydwaith ardal eang (WAN) wide area networks rhwydwaith ardal eang (WAN) wide area publishing cyhoeddi ardal eang wide areas ardal eang (WAN) wide ball pelen lydan wide balls pelen lydan wide open llydan agored wide range of ability ystod eang o allu wide stroke strôc lydan wide strokes strôc lydan wide text testun llydan wide texts testun llydan widely spaced valleys dyffrynnoedd pell oddi wrth ei gilydd widen lledu widen a pattern lledu patrwm widening joint uniad lledu widening joints uniad lledu widescreen sgrin lydan widescreens sgrin lydan width lled widths lled wiggle nail hoelen rychiog wiggle nails hoelen rychiog wild card nodchwilio wild scape gwylltlun wild scapes gwylltlun wild silk sidan gwyllt wild silks sidan gwyllt wildlife bywyd gwyllt wildlifes bywyd gwyllt will ewyllys willow helygen willow charcoal siarcol helyg willow charcoals siarcol helyg willows helygen wills ewyllys wilt gwywo wilting coefficient cyfernod gwywo wilting coefficients cyfernod gwywo win ennill win a game ennill gêm win by 3 wickets ennill o dair wiced win by a canvas ennill o gynfas win by a length ennill o un hyd win by an innings ennill o fatiad win easily ennill o ddigon win possession ennill meddiant winch winsh winch winsio winches winsh wind camdroad (in timber) wind dirwyn (cord, rope etc) wind gwynt (that blows) wind chest cist wynt wind chests cist wynt wind dispersal gwasgariad gan y gwynt wind dispersals gwasgariad gan y gwynt wind erosion erydiad gwynt wind erosions erydiad gwynt wind instrument chwythbren wind instruments chwythbren wind machine peiriant gwynt wind machines peiriant gwynt wind of change gwynt cyfnewid wind quartet pedwarawd chwyth wind quartets pedwarawd chwyth wind sacks codennau awyr wind solo unawd chwythbrennau wind speed buanedd y gwynt wind speeds buanedd y gwynt wind-break atalfa wynt wind-breaks atalfa wynt windband band chwyth windbands band chwyth winder dirwynydd winders dirwynydd windgap bwlch gwynt windgaps bwlch gwynt winding dirwyniad windings dirwyniad windmill melin wynt windmills melin wynt window ffenestr window ladder ysgol ffenestr window ladders ysgol ffenestr window-sill silff ffenestr window-sills silff ffenestr windowing ffenestru windows ffenestr windproof gwyntglos (finish) windproof clothing dillad gwyntglos windpump pwmp gwynt windpumps pwmp gwynt windrose seren wynt windroses seren wynt winds camdroad (in timber) winds gwynt (that blows) windscreen sgrin wynt windscreens sgrin wynt windvane ceiliog y gwynt windvanes ceiliog y gwynt windward atwynt windward side ochr atwynt windward sides ochr atwynt wine bar bar gwin wine bars bar gwin wing adain (in general) wing asgell (in sports etc) wing attack ymosodwr asgell wing attacks ymosodwr asgell wing compass cwmpas adeiniog wing defence gwarchodwr asgell wing defences gwarchodwr asgell wing forward blaenasgellwr wing forwards blaenasgellwr wing nut nyten asgellog wing nuts nyten asgellog wing three quarter asgellwr wing three quarters asgellwr wing-half hanerwr asgell wing-halfs hanerwr asgell winged adeiniog (of insect, fruit) winger asgellwr wingers asgellwr wings adain (in general) wings asgell (in sports etc) winning stroke ergyd ennill winning strokes ergyd ennill winter solstice heuldro'r gaeaf winter solstices heuldro'r gaeaf winter sports chwaraeon y gaeaf winterbourne nant hafesb winterbournes nant hafesb wipe disodli (in film-editing etc) wiper sychwr wipers sychwr wire gwifren wire gwifro wire brush brwsh gwifrau wire brushs brwsh gwifrau wire coil coil gwifren wire coils coil gwifren wire edge ymyl wifrog wire edges ymyl wifrog wire foundation sylfaen wifren wire foundations sylfaen wifren wire frame ffrâm wifren wire frames ffrâm wifren wire gauge medrydd gwifren wire gauges medrydd gwifren wire loop dolen wifren wire loops dolen wifren wire mesh rhwyll wifrog wire mesh guard gard rhwyll wifrog wire mesh guards gard rhwyll wifrog wire mesh support cynhaliwr rhwyll wifrog wire mesh supports cynhaliwr rhwyll wifrog wire meshs rhwyll wifrog wire nail hoelen gron wire nails hoelen gron wire pliers gefelen wifrau wire printer argraffydd gwifren wire printers argraffydd gwifren wire safety cage cawell diogelwch gwifrau wire safety cages cawell diogelwch gwifrau wire staples styffylau gwifren wire wool gwlân dur wire wools gwlân dur wire-stripping pliers gefelen stripio gwifrau wired gwifrog wires gwifren wisdom literature llenyddiaeth doethineb wisdom literatures llenyddiaeth doethineb wisdom tooth cilddant ôl wisdom tooths cilddant ôl witch hunt erledigaeth witch hunts erledigaeth witch of Agnesi cromlin Agnesi witchcraft dewiniaeth witchcrafts dewiniaeth witchcraze gwrachdwymyn witchcrazes gwrachdwymyn with the grain gyda'r graen withdraw cilio withdraw a child from religious education tynnu plentyn yn ôl o addysg grefyddol withdrawal alldyniad (of money) withdrawal symptom symptom diddyfnu withdrawal symptoms symptom diddyfnu withdrawal tool erfyn tynnu allan withdrawal tools erfyn tynnu allan withdrawals alldyniad (of money) withdrawn encilgar wither gwywo without contact heb gyffwrdd without loss of generality heb golli cyffredinolrwydd witness tyst witness tystio witness order gorchymyn tystiolaeth witness orders gorchymyn tystiolaeth witness punch pwnsh tyst witness punches pwnsh tyst witness punching tystbwnsio witness statement datganiad gan dyst witness statements datganiad gan dyst woad glaslys woads glaslys wobbler wobler wobblers wobler wolf note nodyn blaidd wolf notes nodyn blaidd wolf vault llofnaid blaidd wolf vaults llofnaid blaidd womb croth wombs croth women's liberation movement mudiad rhyddid merched women's liberation movements mudiad rhyddid merched wood coed (=forest) wood pren (=material) wood ash lludw pren wood ashs lludw pren wood bending plygu coed wood bendings plygu coed wood block bloc pren wood blocks bloc pren wood carving cerfiad pren wood carving cerfio pren wood carvings cerfiad pren wood dye llifyn pren wood dyes llifyn pren wood engraving ysgythriad pren wood engravings ysgythriad pren wood fibre ffibr coed wood fibres ffibr coed wood grain graen pren wood grains graen pren wood jackplane plaen jac pren wood jackplanes plaen jac pren wood joint uniad pren wood joints uniad pren wood mallet gordd bren wood mallets gordd bren wood of light colour pren golau ei liw wood plug plwg pren wood plugs plwg pren wood pulp mwydion coed wood scraper sgrafell goed wood scrapers sgrafell goed wood screw sgriw bren wood screws sgriw bren wood sealer seliwr coed wood sealers seliwr coed wood shavings naddion pren wood shot taro'r pren wood turning turnio coed wood turning gouge gaing gau durnio wood turning gouges gaing gau durnio wood work gwaith coed wood works gwaith coed wood-boring insect pryfyn tyllu coed wood-boring insects pryfyn tyllu coed woodchip wallpaper papur sglodion pren woodchip wallpapers papur sglodion pren woodcut torlun pren woodcuts torlun pren wooden bead glain pren wooden beads glain pren wooden cleat cledd pren (used in seasoning) wooden cleats cledd pren (used in seasoning) wooden frame ffrâm bren wooden frames ffrâm bren wooden handle coes bren (of brush) wooden handles coes bren (of brush) wooden marionette marionét pren wooden marionettes marionét pren wooden racket raced bren wooden rackets raced bren wooden shuttle gwennol bren wooden shuttles gwennol bren wooden spokeshave rhasgl bren wooden spokeshaves rhasgl bren wooden spoon llwy bren wooden spoons llwy bren woodland coetir woodlands coetir woodpecker cnocell y coed woodpeckers cnocell y coed woods coed (=forest) woods pren (=material) woodwind section adran chwythbrennau woodwind sections adran chwythbrennau woodworm pryfed pren woody prennaidd woof anwe woofs anwe wool gwlân woollen gwlân woollen garments dillad gwlân woollen industry diwydiant gwlân woollen mill melin wlân woollen mills melin wlân woollen thread edau wlân woollen threads edau wlân woollens nwyddau gwlân woolly gwlanog wools gwlân woolsack sach wlân woolsacks sach wlân word gair word equation hafaliad geiriau word equations hafaliad geiriau word length hyd gair word lengths hyd gair word orientated geiriol gyfeiriedig word painting lliwio geiriau word processing prosesu geiriau word processing software meddalwedd prosesu geiriau word processing softwares meddalwedd prosesu geiriau word processor prosesydd geiriau word processors prosesydd geiriau words gair wordwrap geirlap wordwraps geirlap work gwaith work gweithio work area ardal waith work areas ardal waith work bench mainc waith work benches mainc waith work box basged wnïo work boxes basged wnïo work card cerdyn gwaith work cards cerdyn gwaith work experience profiad gwaith work experience scheme cynllun profiad gwaith work experience schemes cynllun profiad gwaith work experiences profiad gwaith work hardening gwaith galedu work of art gwaith celfyddydol work opportunity service gwasanaeth cyfle am waith work opportunity services gwasanaeth cyfle am waith work pattern patrwm gwaith work patterns patrwm gwaith work placement lleoliad gwaith work placements lleoliad gwaith work sheet dalen waith work sheets dalen waith work tape tâp gwaith work tapes tâp gwaith work to rule gweithio i reol work-based assessment asesu yn y gweithle work-board bwrdd gweithio basgedi (basketry) work-boards bwrdd gweithio basgedi (basketry) worked buttonhole twll botwm pwythog worked buttonholes twll botwm pwythog worked loop dolen edau worked loops dolen edau worked scalloping sgolop wedi'i weithio worked scallopings sgolop wedi'i weithio worker gweithiwr workers gweithiwr workforce gweithlu workforces gweithlu workhouse tloty workhouses tloty working area rhan weithio working areas rhan weithio working capital cyfalaf gweithio working capitals cyfalaf gweithio working class dosbarth gwaith working conditions amodau gwaith working draft drafft gweithio working drafts drafft gweithio working drawing lluniad gweithio working drawings lluniad gweithio working edge ymyl weithio working edges ymyl weithio working face wyneb gweithio working faces wyneb gweithio working group gweithgor working groups gweithgor working line llinell waith working lines llinell waith working party gweithgor working population poblogaeth weithio working populations poblogaeth weithio working property priodwedd gweithio working to capacity gweithio i'r eithaf working-out datblygiad (development) working-outs datblygiad (development) workpiece darn gwaith workpieces darn gwaith works gwaith works manager rheolwr gweithiau works managers rheolwr gweithiau worksheet taflen waith worksheets taflen waith workshop gweithdy workshop approach dull gweithdy workshop approaches dull gweithdy workshop of the world gweithdy'r byd workshops gweithdy workspace gweithle workspaces gweithle workstation gweithfan workstations gweithfan worktop wyneb gweithio (kitchen) worktops wyneb gweithio (kitchen) world context cyd-destun byd-eang world contexts cyd-destun byd-eang world development datblygiad y byd world developments datblygiad y byd world economic growth twf economaidd byd-eang world economic growths twf economaidd byd-eang world of fantasy byd ffantasi world war rhyfel byd world wars rhyfel byd worldwide byd-eang worm drive gyriad cripian worm drives gyriad cripian worm eaten pryf-dyllog worm gears gerau cripian worm wheel olwyn gripian worm wheels olwyn gripian worn wedi treulio worn oilstone carreg hogi wedi treulio worn oilstones carreg hogi wedi treulio worn threadbare wedi'i gwisgo at yr edau (with feminine nouns) worn threadbare wedi'i wisgo at yr edau (with masculine nouns) worship addoli worship addoliad worsted wstid wound clwyf wound clwyfo wound wedi'i weindio wound dressing gorchudd clwyf wound dressings gorchudd clwyf wounds clwyf woven wedi'i gwehyddu (with feminine nouns) woven wedi'i wehyddu (with masculine nouns) woven carpet carped wedi'i wehyddu woven carpets carped wedi'i wehyddu woven lace les wedi'i wehyddu woven laces les wedi'i wehyddu woven textiles tecstilau wedi'u gwehyddu wrap lapio (in general) wrap-around amlap wrap-around amlapio wrap-arounds amlap wrasse gwrachen y môr wrasses gwrachen y môr writing skills sgiliau ysgrifennu written communication cyfathrebu ysgrifenedig youth dependency dibyniaeth ieuenctid youth justice cyfiawnder i’r ifanc youth justices cyfiawnder i’r ifanc zakah zakah zakahs zakah zazen zazen zazens zazen zero tolerance policy polisi goddef dim zonation dosbarthiad mewn cylchfaoedd zonations dosbarthiad mewn cylchfaoedd zone of proximal development cylchfa datblygiad procsimol zoo format fformat sw zoo formats fformat sw zoom in tynhau'r lens (in camera work) zoom out llacio'r lens (in camera work) zooplankton swoplancton zooplanktons swoplancton étude étude études étude