TermCymru

Results are displayed in English alphabetical order A-Z
English: iron sheeting
Welsh: dalennau haearn
Status C
Subject: Planning
Part of speech: Noun, Plural
Last Updated: 27 February 2006
English: ironworks
Welsh: gwaith haearn
Status C
Subject: Economic development
Part of speech: Noun, Masculine, Singular
Last Updated: 22 February 2006
English: ironworks
Welsh: gweithfeydd haearn
Status C
Subject: Economic development
Part of speech: Noun, Plural
Last Updated: 24 February 2006
English: IROPI
Welsh: am resymau hanfodol sef er budd cyhoeddus tra phwysig
Status C
Subject: Law
Part of speech: Preposition
Definition: imperative reasons of overriding public interest
Last Updated: 21 July 2011
English: irradiance
Welsh: arbelydriad
Status B
Subject: Environment
Part of speech: Noun, Masculine, Singular
Last Updated: 23 March 2021
English: irrational
Welsh: afresymegol
Status C
Subject: Law
Part of speech: Adjective
Context: in judicial review
Last Updated: 18 October 2011
English: irrational or perverse
Welsh: afresymegol neu wrthnysig
Status C
Subject: Law
Part of speech: Adjective
Last Updated: 11 October 2004
English: irrecoverable error
Welsh: gwall anadferadwy
Status B
Subject: ICT
Part of speech: Noun, Masculine, Singular
Last Updated: 19 July 2005
English: irregular animals
Welsh: anifeiliaid ag anghysonderau
Status C
Subject: Agriculture
Part of speech: Noun, Plural
Definition: cattle premium schemes
Last Updated: 8 October 2003
English: irregular employment
Welsh: cyflogaeth afreolaidd
Status B
Subject: Personnel
Part of speech: Noun, Feminine, Singular
Last Updated: 21 January 2003
English: irregularities
Welsh: afreoleidd-dra
Status C
Subject: Finance and statistics
Part of speech: Noun, Masculine, Singular
Last Updated: 4 February 2014
English: irrelevant consideration
Welsh: ystyriaeth amherthnasol
Status C
Subject: Law
Part of speech: Noun, Feminine, Singular
Context: in judicial review
Last Updated: 18 October 2011
English: irreversible harm
Welsh: niwed na ellir ei wrthdroi
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Context: Bydd y cynigion yn sicrhau gofal effeithiol drwy osgoi ymyriadau meddygol diangen y gallai fod angen eu gwrthdroi yn y dyfodol. Gall y cynigion hefyd leihau nifer yr achosion o niwed na ellir ei wrthdroi a allai ddeillio o driniaeth.
Last Updated: 4 July 2024
English: irrevocably committed
Welsh: wedi ymrwymo’n ddi-droi’n-ôl
Status C
Subject: Agriculture
Part of speech: Verb
Last Updated: 29 July 2003
English: irritable bowel syndrome
Welsh: syndrom coluddyn llidus
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Last Updated: 8 March 2012
English: IRRV
Welsh: Y Sefydliad Ardrethu a Phrisio Refeniw
Status B
Subject: Finance and statistics
Part of speech: Noun, Masculine, Singular
Definition: Institute of Revenues Rating and Valuation
Last Updated: 19 May 2005
English: IRS
Welsh: Sefydliad Astudiaethau Gwledig
Status C
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: Institute of Rural Studies
Last Updated: 4 August 2006
English: IRT
Welsh: Damcaniaeth Ymateb i Eitem
Status B
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Definition: Techneg ystadegol a ddefnyddir i fesur gwahaniaethau yng ngalluoedd ac agweddau unigolion. Fe'i defnyddir yn bennaf wrth edrych ar "eitemau" (hynny yw, yr ymatebion a roddir i dasgau neu gwestiynau) mewn holiaduron a phrofion.
Notes: Dyma'r acronym Saesneg a ddefnyddir am Item Response Theory.
Last Updated: 22 November 2023
English: IRU
Welsh: Uned Adolygu Gweithredu
Status C
Subject: Education
Part of speech: Noun, Feminine, Singular
Definition: Implementation Review Unit
Last Updated: 23 December 2005
English: IRU
Welsh: Yr Uned Hawl i Wybodaeth
Status C
Subject: Welsh Government posts and departments
Part of speech: Noun, Feminine, Singular
Context: Information Rights Unit
Last Updated: 4 May 2011
English: ISA
Welsh: Safon Ryngwladol ar Archwilio
Status C
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Definition: International Standard on Auditing
Last Updated: 3 November 2008
English: ISA
Welsh: Awdurdod Diogelu Annibynnol
Status A
Subject: Social services
Part of speech: Noun, Masculine, Singular
Definition: Independent Safeguarding Authority
Last Updated: 30 August 2007
English: ISA
Welsh: ISA
Status C
Subject: Finance and statistics
Definition: Individual Savings Account
Last Updated: 7 October 2004
English: ISBN
Welsh: Rhif Llyfr Safonol Rhyngwladol
Status B
Subject: Culture and the arts
Part of speech: Noun, Masculine, Singular
Last Updated: 8 November 2018
English: ischaemic heart disease
Welsh: clefyd isgemia'r galon
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Last Updated: 3 March 2006
English: ISD
Welsh: Athrofa Datblygu Cynaliadwy
Status C
Subject: Economic development
Part of speech: Noun, Feminine, Singular
Definition: Institute for Sustainable Design
Last Updated: 12 December 2011
English: ISD
Welsh: Is-adran Gwasanaethau Gwybodaeth
Status C
Subject: Welsh Government posts and departments
Part of speech: Noun, Feminine, Singular
Definition: Information Services Division
Last Updated: 11 July 2012
English: ISDN
Welsh: ISDN
Status B
Subject: ICT
Part of speech: Noun, Masculine, Singular
Definition: Integrated Services Digital Network
Last Updated: 23 December 2003
English: is due in no small part to
Welsh: i'w briodoli i raddau helaeth i
Status C
Subject: Law
Part of speech: Verb
Last Updated: 3 March 2006
English: ISG
Welsh: Grŵp Strategaeth Seilwaith
Status B
Subject: Planning
Part of speech: Noun, Masculine, Singular
Notes: Dyma'r acronym Saesneg a ddefnyddir am Infrastructure Strategy Group.
Last Updated: 14 August 2025
English: Islam
Welsh: Islam
Status A
Subject: Religion
Part of speech: Noun, Feminine, Singular
Last Updated: 15 March 2006
English: Islam
Welsh: Islam
Status B
Subject: Religion
Part of speech: Noun, Masculine, Singular
Last Updated: 19 April 2023
English: Islamic
Welsh: Islamaidd
Status B
Subject: Religion
Part of speech: Adjective
Definition: Yn ymwneud â chrefydd Islam.
Notes: Sylwer na ddylid drysu'r termau Cymraeg a Saesneg hyn â'r termau Islamist/Islamyddol, sy'n ymwneud â ffwndamentaliaeth Islamaidd.
Last Updated: 19 April 2023
English: Islamism
Welsh: Islamyddiaeth
Status B
Subject: Religion
Part of speech: Noun, Feminine, Singular
Definition: Ffwndamentaliaeth Islamaidd, neu gred y dylid cynyddu dylanwad y gyfraith Islamaidd ym meysydd y gyfraith a chymdeithas.
Last Updated: 19 April 2023
English: Islamist
Welsh: Islamydd
Status B
Subject: Religion
Part of speech: Noun, Masculine, Singular
Definition: Ffwndamentalydd Islamaidd, neu un sydd o blaid cynyddu dylanwad y gyfraith Islamaidd ym meysydd y gyfraith a chymdeithas.
Last Updated: 19 April 2023
English: Islamist
Welsh: Islamyddol
Status B
Subject: Religion
Part of speech: Adjective
Definition: Yn ymwneud â ffwndamentaliaeth Islamaidd neu'r gred y dylid cynyddu dylanwad y gyfraith Islamaidd ym meysydd y gyfraith a chymdeithas.
Notes: Sylwer na ddylid drysu'r termau Cymraeg a Saesneg hyn â'r termau Islamic/Islamaidd, sy'n ymwneud â'r grefydd ei hun.
Last Updated: 19 April 2023
English: Islamophobia
Welsh: Islamoffobia
Status B
Subject: Justice and order
Part of speech: Noun, Masculine, Singular
Last Updated: 15 May 2019
English: Island Games
Welsh: Gemau'r Ynysoedd
Status C
Subject: Education
Part of speech: Noun, Plural
Definition: gemau sy'n cael eu cynnal bob dwy flynedd rhwng ynysoedd Ewrop a thu hwnt - bydd yn cael ei gynnal yn Ynys Môn yn 2009
Last Updated: 15 March 2004
English: Islands (Scotland) Act 2018
Welsh: Deddf Ynysoedd (Yr Alban) 2018
Status B
Subject: Titles of legislation
Part of speech: Noun, Feminine, Singular
Notes: Teitl cwrteisi ar ddarn o ddeddfwriaeth sydd ar gael yn Saesneg yn unig.
Last Updated: 13 December 2021
English: Isle of Anglesey
Welsh: Ynys Môn
Status A
Subject: Local government
Part of speech: Noun, Feminine, Singular
Last Updated: 25 June 2002
English: Isle of Anglesey County Council
Welsh: Cyngor Sir Ynys Môn
Status A
Subject: Local government
Part of speech: Noun, Masculine, Singular
Last Updated: 28 February 2005
English: Isle of Man
Welsh: Ynys Manaw
Status A
Subject: Place-names
Part of speech: Proper noun
Notes: Safonwyd yr enw hwn gan ddilyn yr egwyddorion a nodir yn yr erthygl 'Dynodi enwau gwladwriaethau, tiriogaethau a chenhedloedd diwladwriaeth' yn yr Arddulliadur.
Last Updated: 17 August 2021
English: Isle of Wight
Welsh: Ynys Wyth
Status A
Subject: Place-names
Part of speech: Proper noun
Notes: Enw sir yn Lloegr. Safonwyd y ffurf hon gan Banel Safoni Enwau Lleoedd Comisiynydd y Gymraeg fel rhan o restr o siroedd Lloegr. Am ragor o wybodaeth am y prosiect safoni hwn, gweler gwefan Comisiynydd y Gymraeg.
Last Updated: 17 June 2025
English: Islwyn
Welsh: Islwyn
Status A
Subject: Politics
Part of speech: Proper noun
Definition: Constituency
Last Updated: 25 June 2002
English: Islwyn Community Credit Union
Welsh: Undeb Credyd Cymunedol Islwyn
Status A
Subject: Finance and statistics
Part of speech: Proper noun, Masculine, Singular
Last Updated: 22 April 2014
English: ISMI
Welsh: ISMI
Status C
Subject: Social services
Definition: Income Support for Mortgage Interest
Last Updated: 10 January 2003
English: isolated dwellings
Welsh: anheddau ynysig
Status C
Subject: Housing
Part of speech: Noun, Plural
Last Updated: 10 October 2007
English: isolated pocket
Welsh: clwt ynysig
Status C
Subject: Agriculture
Part of speech: Noun, Masculine, Singular
Definition: of habitat
Last Updated: 3 October 2003
English: isolated saline lagoon
Welsh: morlyn hallt ynysig
Status A
Subject: Environment
Part of speech: Noun, Masculine, Singular
Last Updated: 22 April 2014
English: isolation
Welsh: ynysu
Status A
Subject: Health
Part of speech: Verb
Definition: Arfer ym maes iechyd y cyhoedd. Gwahanu pobl sy'n sâl â chlefyd trosglwyddadwy wrth bobl iach, er mwyn atal y clefyd rhag lledu.
Notes: Cymharer â 'quarantine' a 'self-isolate'.
Last Updated: 26 March 2020