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Welsh: achosi neu ganiatáu marwolaeth neu niwed corfforol difrifol i blentyn neu berson agored i niwed

English: causing or allowing death or serious physical harm of child or vulnerable person

Status B

Subject: Law

Part of speech: Verb

Notes: Teitl ar drosedd

Last updated: 27 November 2025

Welsh: adlif gastro-oesoffagaidd difrifol gydag allsugno

English: severe gastro-oesophageal reflux with aspiration

Status C

Subject: Health

Part of speech: Noun, Masculine, Singular

Last updated: 13 December 2010

Welsh: adolygiad achos difrifol

English: serious case review

Status B

Subject: Social services

Part of speech: Noun, Masculine, Singular

Last updated: 22 March 2012

Welsh: adran dadansoddi troseddau difrifol

English: serious crime analysis section

Status B

Subject: Justice and order

Part of speech: Noun, Feminine, Singular

Last updated: 30 August 2012

Welsh: Adrodd am Ddigwyddiadau Niweidiol Difrifol

English: Serious Adverse Incident Reporting

Status C

Subject: General

Part of speech: Verb

Last updated: 21 October 2009

Welsh: adwaith alergaidd difrifol

English: severe allergic reaction

Status C

Subject: Health

Part of speech: Noun, Masculine, Singular

Last updated: 15 August 2011

Welsh: Adweithiau a Digwyddiadau Anffafriol Difrifol yn ymwneud â Gwaed

English: Serious Adverse Blood Reaction and Events

Status C

Subject: Health

Part of speech: Noun, Plural

Last updated: 30 July 2010

Welsh: ag amhariad difrifol ar y golwg

English: severely sight-impaired

Status B

Subject: Health

Part of speech: Adjective

Notes: Gweler yr erthygl ar y Model Cymdeithasol o Anabledd yn yr Arddulliadur. Yn unol â'r Model, mae amhariad ("impairment", a elwid yn "nam" o'r blaen) yn nodwedd ar berson, a all effeithio ar ei ymddangosiad neu ar sut y mae ei gorff neu ei feddwl yn gweithio; caiff pobl anabl (y gellir hefyd cyfeirio atynt fel "pobl anabledig" neu "bobl sy'n cael eu hanablu") eu hanablu gan ffactorau allanol fel yr amgylchedd, polisi neu arferion, neu yn sgil methiant i ddarparu addasiadau ar eu cyfer; ac anabledd yw canlyniad anablu pobl sydd ag amhariadau.

Last updated: 8 November 2023

Welsh: amhariad difrifol ar y clyw

English: severe hearing impairment

Status C

Subject: Health

Part of speech: Noun, Masculine, Singular

Notes: Gweler yr erthygl ar y Model Cymdeithasol o Anabledd yn yr Arddulliadur. Yn unol â'r Model, mae amhariad ("impairment", a elwid yn "nam" o'r blaen) yn nodwedd ar berson, a all effeithio ar ei ymddangosiad neu ar sut y mae ei gorff neu ei feddwl yn gweithio; caiff pobl anabl (y gellir hefyd cyfeirio atynt fel "pobl anabledig" neu "bobl sy'n cael eu hanablu") eu hanablu gan ffactorau allanol fel yr amgylchedd, polisi neu arferion, neu yn sgil methiant i ddarparu addasiadau ar eu cyfer; ac anabledd yw canlyniad anablu pobl sydd ag amhariadau.

Last updated: 8 November 2023

Welsh: anawsterau dysgu difrifol

English: severe learning difficulties

Status C

Subject: Health

Part of speech: Noun, Plural

Definition: SLD

Last updated: 29 January 2008

Welsh: anawsterau dysgu difrifol

English: SLD

Status C

Subject: Health

Part of speech: Noun, Plural

Definition: severe learning difficulties

Last updated: 29 January 2008

Welsh: anghenion ychwanegol difrifol

English: severe additional needs

Status A

Subject: Social services

Part of speech: Noun, Plural

Last updated: 14 May 2013

Welsh: anghymhwysedd proffesiynol difrifol

English: serious professional incompetence

Status A

Subject: Education

Part of speech: Noun, Masculine, Singular

Last updated: 14 May 2013

Welsh: anhwylder affeithiol difrifol

English: severe affective disorder

Status C

Subject: Health

Part of speech: Noun, Masculine, Singular

Last updated: 22 September 2006

Welsh: anhwylderau symudoldeb difrifol

English: complex motility disorders

Status C

Subject: Health

Part of speech: Noun, Plural

Last updated: 13 June 2011

Welsh: anhwylder bwyta difrifol

English: severe eating disorder

Status C

Subject: Health

Part of speech: Noun, Masculine, Singular

Last updated: 22 September 2006

Welsh: anhwylder emosiynol difrifol

English: severe emotional disorder

Status C

Subject: Health

Part of speech: Noun, Masculine, Singular

Last updated: 22 September 2006

Welsh: anhwylder gorbryder difrifol

English: severe anxiety disorder

Status C

Subject: Health

Part of speech: Noun, Masculine, Singular

Last updated: 22 September 2006

Welsh: anwedduster difrifol

English: gross indecency

Status B

Subject: Law

Part of speech: Noun, Masculine, Singular

Last updated: 13 January 2025

Welsh: Asiantaeth Troseddau Cyfundrefnol Difrifol

English: Serious Organised Crime Agency

Status A

Subject: Justice and order

Part of speech: Noun, Feminine, Singular

Definition: SOCA

Context: Replaced by the National Crime Agency in 2013.

Last updated: 25 August 2005

Welsh: bygythiad difrifol ac uniongyrchol i iechyd y cyhoedd

English: serious and imminent threat to public health

Status A

Subject: Health

Part of speech: Noun, Masculine, Singular

Last updated: 26 March 2020

Welsh: Caledi Difrifol

English: Severe Hardship

Status C

Subject: Social services

Part of speech: Noun, Masculine, Singular

Definition: DWP term

Last updated: 13 February 2003

Welsh: camymddwyn difrifol

English: gross misconduct

Status B

Subject: Justice and order

Part of speech: Verb

Last updated: 15 February 2005

Welsh: camymddwyn difrifol

English: serious misconduct

Status C

Subject: General

Part of speech: Noun, Masculine, Singular

Last updated: 14 June 2004

Welsh: camymddwyn proffesiynol difrifol

English: serious professional misconduct

Status A

Subject: Education

Part of speech: Verb

Last updated: 14 May 2013

Welsh: Canllawiau ar Dor Rheolau Difrifol a Thwyll

English: Guidance on Serious Infringements and Fraud

Status A

Subject: Justice and order

Part of speech: Proper noun

Last updated: 9 September 2016

Welsh: Canllawiau ynghylch problemau teithio difrifol (gan gynnwys tywydd garw)

English: Major travel disruption guidance (including severe weather)

Status A

Subject: Transport

Part of speech: Proper noun, Plural

Definition: Document title.

Last updated: 29 January 2013

Welsh: coronafeirws syndrom anadlol acíwt difrifol 2

English: severe acute respiratory syndrome coronavirus 2

Status B

Subject: Health

Part of speech: Noun, Masculine, Singular

Notes: Gellid hefyd ddefnyddio 'coronafeirws SARS-CoV-2' yn Gymraeg.

Last updated: 14 May 2020

Welsh: datganiad o fygythiad difrifol ac uniongyrchol

English: serious and imminent threat declaration

Status A

Subject: Health

Part of speech: Noun, Masculine, Singular

Last updated: 26 March 2020

Welsh: Deddf Troseddu Cyfundrefnol Difrifol a'r Heddlu 2005

English: Serious Organised Crime and Police Act 2005

Status C

Subject: Titles of legislation

Part of speech: Noun, Feminine, Singular

Context: SOCPA

Last updated: 25 March 2010

Welsh: Deddf Troseddu Cyfundrefnol Difrifol a'r Heddlu 2005

English: SOCPA

Status C

Subject: Titles of legislation

Part of speech: Noun, Feminine, Singular

Definition: Serious Organised Crime and Police Act

Last updated: 25 March 2010

Welsh: diffyg imiwnedd cyfun difrifol

English: SCID

Status B

Subject: Health

Part of speech: Noun, Masculine, Singular

Definition: Grŵp o anhwylderau prin a gaiff eu hetifeddu, sy’n achosi annormaleddau mawr yn y system imiwnedd.

Notes: Dyma'r acronym a ddefnyddir am severe combined immunodeficiency.

Last updated: 26 March 2020

Welsh: diffyg imiwnedd cyfun difrifol

English: severe combined immunodeficiency

Status B

Subject: Health

Part of speech: Noun, Masculine, Singular

Definition: Grŵp o anhwylderau prin a gaiff eu hetifeddu, sy’n achosi annormaleddau mawr yn y system imiwnedd.

Last updated: 26 March 2020

Welsh: diffyg imiwnedd sylfaenol difrifol

English: severe primary immunodeficiency

Status C

Subject: Health

Part of speech: Noun, Masculine, Singular

Last updated: 15 August 2011

Welsh: digwyddiad niweidiol difrifol

English: serious adverse event

Status B

Subject: Health

Part of speech: Noun, Masculine, Singular

Last updated: 9 May 2012

Welsh: dirywiad gwybyddol difrifol

English: severe cognitive decline

Status B

Subject: Health

Part of speech: Noun, Masculine, Singular

Last updated: 18 May 2023

Welsh: Dyletswydd Trais Difrifol

English: Serious Violence Duty

Status B

Subject: Law

Part of speech: Noun, Masculine, Singular

Last updated: 9 June 2022

Welsh: Gofalu am Blant Difrifol Wael - Safonau

English: Caring for Critically Ill Children - Standards

Status A

Subject: Health

Definition: document title

Last updated: 6 November 2003

Welsh: Gorchymyn Deddf Tai 1985 (Diwygio Atodlen 2A) (Troseddau Difrifol) (Cymru) 2016

English: The Housing Act 1985 (Amendment of Schedule 2A) (Serious Offences) (Wales) Order 2016

Status A

Subject: Titles of legislation

Part of speech: Proper noun, Masculine, Singular

Last updated: 1 March 2016

Welsh: gweld yn ddifrifol-rannol

English: severely partially-sighted

Status B

Subject: Health

Part of speech: Verb

Plural: Gallai'r ymadrodd 'gweld yn rhannol i raddau difrifol' fod yn fwy eglur mewn rhai cyd-destunau.

Last updated: 27 March 2025

Welsh: gwenwyno difrifol gan CO

English: severe CO poisoning

Status C

Subject: Health

Part of speech: Verb

Definition: CO = carbon monoxide

Last updated: 25 January 2007

Welsh: Law yn Llaw at Iechyd - Cynllun Cyflawni ar gyfer y Rhai sy'n Ddifrifol Wael

English: Together for Health - A Delivery Plan for the Critically Ill

Status A

Subject: Health

Part of speech: Proper noun

Context: Document title.

Last updated: 10 September 2013

Welsh: Lwfans Anabledd Difrifol

English: Severe Disablements Allowance

Status A

Subject: Social services

Part of speech: Noun, Masculine, Singular

Notes: Gweler yr erthygl ar y Model Cymdeithasol o Anabledd yn yr Arddulliadur. Yn unol â'r Model, mae amhariad ("impairment", a elwid yn "nam" o'r blaen) yn nodwedd ar berson, a all effeithio ar ei ymddangosiad neu ar sut y mae ei gorff neu ei feddwl yn gweithio; caiff pobl anabl (y gellir hefyd cyfeirio atynt fel "pobl anabledig" neu "bobl sy'n cael eu hanablu") eu hanablu gan ffactorau allanol fel yr amgylchedd, polisi neu arferion, neu yn sgil methiant i ddarparu addasiadau ar eu cyfer; ac anabledd yw canlyniad anablu pobl sydd ag amhariadau.

Last updated: 17 November 2023

Welsh: Lwfans Anabledd Difrifol Eithriadol

English: Exceptionally Severe Disablement Allowance

Status C

Subject: Social services

Part of speech: Noun, Masculine, Singular

Definition: DWP term

Notes: Gweler yr erthygl ar y Model Cymdeithasol o Anabledd yn yr Arddulliadur. Yn unol â'r Model, mae amhariad ("impairment", a elwid yn "nam" o'r blaen) yn nodwedd ar berson, a all effeithio ar ei ymddangosiad neu ar sut y mae ei gorff neu ei feddwl yn gweithio; caiff pobl anabl (y gellir hefyd cyfeirio atynt fel "pobl anabledig" neu "bobl sy'n cael eu hanablu") eu hanablu gan ffactorau allanol fel yr amgylchedd, polisi neu arferion, neu yn sgil methiant i ddarparu addasiadau ar eu cyfer; ac anabledd yw canlyniad anablu pobl sydd ag amhariadau.

Last updated: 17 November 2023

Welsh: methiant difrifol

English: serious breakdown

Status B

Subject: Education

Part of speech: Noun, Masculine, Singular

Context: in the way the school is managed

Last updated: 20 October 2011

Welsh: mewn perygl difrifol

English: critically endangered

Status A

Subject: Environment

Part of speech: Adjective

Definition: CR

Last updated: 6 January 2014

Welsh: mewn perygl difrifol

English: CR

Status A

Subject: Environment

Part of speech: Adjective

Definition: critically endangered

Last updated: 7 January 2014

Welsh: niwed corfforol difrifol

English: GBH

Status C

Subject: Justice and order

Part of speech: Noun, Masculine, Singular

Definition: grievous bodily harm

Last updated: 3 June 2011

Welsh: niwed corfforol difrifol

English: grievous bodily harm

Status C

Subject: Justice and order

Part of speech: Noun, Masculine, Singular

Definition: GBH

Last updated: 3 June 2011

Welsh: niwed corfforol difrifol

English: GBH

Status A

Subject: Law

Part of speech: Noun, Masculine, Singular

Notes: Dyma'r acronym a ddefnyddir yn gyffredin yn Saesneg am 'grievous bodily harm'. Argymhellir defnyddio'r term llawn yn Gymraeg hyd y bo modd, ond gellid defnyddio'r ffurf GBH mewn amgylchiadau eithriadol.

Last updated: 13 December 2017

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