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English: introductory tenancy

Welsh: tenantiaeth ragarweiniol

Status A

Subject: Housing

Part of speech: Noun, Feminine, Singular

Plural: tenantiaethau rhagarweiniol

Last Updated: 26 November 2019

English: introductory tenancy

Welsh: tenantiaeth ragarweiniol

Status A

Subject: Housing

Part of speech: Noun, Feminine, Singular

Plural: tenantiaethau rhagarweiniol

Last Updated: 26 November 2019

English: intrusion detection system

Welsh: system darganfod tresmasu

Status A

Subject: ICT

Part of speech: Noun, Feminine, Singular

Last Updated: 15 February 2010

English: intrusion detection system

Welsh: system darganfod tresmasu

Status A

Subject: ICT

Part of speech: Noun, Feminine, Singular

Last Updated: 15 February 2010

English: intrusion prevention system

Welsh: system atal tresmasu

Status A

Subject: ICT

Part of speech: Noun, Feminine, Singular

Last Updated: 8 April 2013

English: intrusion prevention system

Welsh: system atal tresmasu

Status A

Subject: ICT

Part of speech: Noun, Feminine, Singular

Last Updated: 8 April 2013

English: intrusive

Welsh: ymwthiol

Status C

Subject: Planning

Part of speech: Adjective

Last Updated: 23 July 2003

English: intrusive

Welsh: ymwthiol

Status C

Subject: Planning

Part of speech: Adjective

Last Updated: 23 July 2003

English: intuitive user interface

Welsh: rhyngwyneb hawdd ei ddeall a'i ddefnyddio

Status C

Subject: ICT

Part of speech: Noun, Masculine, Singular

Last Updated: 15 February 2010

English: intuitive user interface

Welsh: rhyngwyneb hawdd ei ddeall a'i ddefnyddio

Status C

Subject: ICT

Part of speech: Noun, Masculine, Singular

Last Updated: 15 February 2010

English: intussusception

Welsh: llawesiad

Status A

Subject: Health

Part of speech: Noun, Masculine, Singular

Definition: The inversion of one portion of intestine into another.

Last Updated: 30 August 2013

English: intussusception

Welsh: llawesiad

Status A

Subject: Health

Part of speech: Noun, Masculine, Singular

Definition: The inversion of one portion of intestine into another.

Last Updated: 30 August 2013

English: inundation

Welsh: llifogydd o'r môr

Status C

Subject: Environment

Part of speech: Noun, Masculine, Singular

Last Updated: 30 October 2009

English: inundation

Welsh: llifogydd o'r môr

Status C

Subject: Environment

Part of speech: Noun, Masculine, Singular

Last Updated: 30 October 2009

English: invading species

Welsh: rhywogaethau sy'n ymledu

Status C

Subject: Environment

Part of speech: Noun, Plural

Last Updated: 25 June 2007

English: invading species

Welsh: rhywogaethau sy'n ymledu

Status C

Subject: Environment

Part of speech: Noun, Plural

Last Updated: 25 June 2007

English: invalid

Welsh: annilys

Status B

Subject: Local government

Part of speech: Adjective

Last Updated: 21 March 2003

English: invalid

Welsh: annilys

Status B

Subject: Local government

Part of speech: Adjective

Last Updated: 21 March 2003

English: invalid application

Welsh: cais annilys

Status A

Subject: Planning

Part of speech: Noun, Masculine, Singular

Plural: ceisiadau annilys

Notes: Yng nghyd-destun y gyfundrefn gyfreithiol ar gyfer cynllunio.

Last Updated: 18 February 2026

English: invalid application

Welsh: cais annilys

Status A

Subject: Planning

Part of speech: Noun, Masculine, Singular

Plural: ceisiadau annilys

Notes: Yng nghyd-destun y gyfundrefn gyfreithiol ar gyfer cynllunio.

Last Updated: 18 February 2026

English: invalid assignment

Welsh: aseiniad annilys

Status B

Subject: Housing

Part of speech: Noun, Masculine, Singular

Last Updated: 24 May 2012

English: invalid assignment

Welsh: aseiniad annilys

Status B

Subject: Housing

Part of speech: Noun, Masculine, Singular

Last Updated: 24 May 2012

English: Invalid Care Allowance

Welsh: Lwfans Gofal Analluedd

Status C

Subject: Social services

Part of speech: Noun, Masculine, Singular

Definition: DWP term

Last Updated: 13 February 2003

English: Invalid Care Allowance

Welsh: Lwfans Gofal Analluedd

Status C

Subject: Social services

Part of speech: Noun, Masculine, Singular

Definition: DWP term

Last Updated: 13 February 2003

English: invalid carriage

Welsh: cerbyd pobl anabl

Status C

Subject: Transport

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

English: invalid carriage

Welsh: cerbyd pobl anabl

Status C

Subject: Transport

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

English: invalidity

Welsh: annilysrwydd

Status A

Subject: Local government

Part of speech: Noun, Masculine, Singular

Definition: Not valid.

Last Updated: 20 November 2013

English: invalidity

Welsh: annilysrwydd

Status A

Subject: Local government

Part of speech: Noun, Masculine, Singular

Definition: Not valid.

Last Updated: 20 November 2013

English: Invalidity Addition

Welsh: Ychwanegiad Analluedd

Status C

Subject: Social services

Part of speech: Noun, Masculine, Singular

Definition: DWP term

Last Updated: 13 February 2003

English: Invalidity Addition

Welsh: Ychwanegiad Analluedd

Status C

Subject: Social services

Part of speech: Noun, Masculine, Singular

Definition: DWP term

Last Updated: 13 February 2003

English: Invalidity Benefit

Welsh: Budd-dal Analluedd

Status C

Subject: Social services

Part of speech: Noun, Masculine, Singular

Definition: DWP term

Last Updated: 25 November 2003

English: Invalidity Benefit

Welsh: Budd-dal Analluedd

Status C

Subject: Social services

Part of speech: Noun, Masculine, Singular

Definition: DWP term

Last Updated: 25 November 2003

English: invasive alien species

Welsh: rhywogaeth estron oresgynnol

Status B

Subject: Environment

Part of speech: Noun, Feminine, Singular

Plural: rhywogaethau estron goresgynnol

Definition: Anifail neu blanhigyn a gyflwynir yn fwriadol neu’n anfwriadol i amgylchedd naturiol lle nad yw fel arfer i’w gael, gyda goblygiadau andwyol difrifol i’w amgylchedd newydd. Gall hefyd achosi niwed economaidd a niwed i iechyd pobl.

Notes: Mae’r term Saesneg invasive non-native species yn gyfystyr.

Last Updated: 16 September 2024

English: invasive alien species

Welsh: rhywogaeth estron oresgynnol

Status B

Subject: Environment

Part of speech: Noun, Feminine, Singular

Plural: rhywogaethau estron goresgynnol

Definition: Anifail neu blanhigyn a gyflwynir yn fwriadol neu’n anfwriadol i amgylchedd naturiol lle nad yw fel arfer i’w gael, gyda goblygiadau andwyol difrifol i’w amgylchedd newydd. Gall hefyd achosi niwed economaidd a niwed i iechyd pobl.

Notes: Mae’r term Saesneg invasive non-native species yn gyfystyr.

Last Updated: 16 September 2024

English: invasive aquatic species

Welsh: rhywogaeth oresgynnol ddyfrol

Status C

Subject: Environment

Part of speech: Noun, Feminine, Singular

Last Updated: 13 November 2014

English: invasive aquatic species

Welsh: rhywogaeth oresgynnol ddyfrol

Status C

Subject: Environment

Part of speech: Noun, Feminine, Singular

Last Updated: 13 November 2014

English: invasive cancer

Welsh: canser ymledol

Status C

Subject: Health

Part of speech: Noun, Masculine, Singular

Last Updated: 17 July 2006

English: invasive cancer

Welsh: canser ymledol

Status C

Subject: Health

Part of speech: Noun, Masculine, Singular

Last Updated: 17 July 2006

English: invasive non-native species

Welsh: rhywogaethau estron goresgynnol

Status A

Subject: Environment

Part of speech: Noun, Plural

Last Updated: 20 May 2014

English: invasive non-native species

Welsh: rhywogaethau estron goresgynnol

Status A

Subject: Environment

Part of speech: Noun, Plural

Last Updated: 20 May 2014

English: invasive non-native species

Welsh: rhywogaeth estron oresgynnol

Status B

Subject: Environment

Part of speech: Noun, Feminine, Singular

Plural: rhywogaethau estron goresgynnol

Definition: Anifail neu blanhigyn a gyflwynir yn fwriadol neu’n anfwriadol i amgylchedd naturiol lle nad yw fel arfer i’w gael, gyda goblygiadau andwyol difrifol i’w amgylchedd newydd. Gall hefyd achosi niwed economaidd a niwed i iechyd pobl.

Notes: Mae’r term Saesneg invasive alien species yn gyfystyr.

Last Updated: 18 September 2024

English: invasive non-native species

Welsh: rhywogaeth estron oresgynnol

Status B

Subject: Environment

Part of speech: Noun, Feminine, Singular

Plural: rhywogaethau estron goresgynnol

Definition: Anifail neu blanhigyn a gyflwynir yn fwriadol neu’n anfwriadol i amgylchedd naturiol lle nad yw fel arfer i’w gael, gyda goblygiadau andwyol difrifol i’w amgylchedd newydd. Gall hefyd achosi niwed economaidd a niwed i iechyd pobl.

Notes: Mae’r term Saesneg invasive alien species yn gyfystyr.

Last Updated: 18 September 2024

English: invasive shrimp

Welsh: berdysen oresgynnol

Status C

Subject: Environment

Part of speech: Noun, Feminine, Singular

Plural: berdys goresgynnol

Last Updated: 2 April 2025

English: invasive shrimp

Welsh: berdysen oresgynnol

Status C

Subject: Environment

Part of speech: Noun, Feminine, Singular

Plural: berdys goresgynnol

Last Updated: 2 April 2025

English: invasive species

Welsh: rhywogaeth oresgynnol

Status B

Subject: Agriculture

Part of speech: Noun, Feminine, Singular

Definition: A species occurring as a result of human activities beyond its accepted normal distribution and which threatens valued environmental, agricultural or personal resources by the damage it causes.

Last Updated: 22 September 2004

English: invasive species

Welsh: rhywogaeth oresgynnol

Status B

Subject: Agriculture

Part of speech: Noun, Feminine, Singular

Definition: A species occurring as a result of human activities beyond its accepted normal distribution and which threatens valued environmental, agricultural or personal resources by the damage it causes.

Last Updated: 22 September 2004

English: invasive ventilation

Welsh: cymorth anadlu mewnwthiol

Status A

Subject: Health

Part of speech: Noun, Masculine, Singular

Definition: Cymorth anadlu mecanyddol sy'n cael ei ddarparu drwy diwb i lawr y llwnc.

Notes: Mewn cyd-destunau llai technegol, mae'n bosibl y byddai 'cymorth anadlu drwy diwb' yn fwy addas.

Last Updated: 5 June 2020

English: invasive ventilation

Welsh: cymorth anadlu mewnwthiol

Status A

Subject: Health

Part of speech: Noun, Masculine, Singular

Definition: Cymorth anadlu mecanyddol sy'n cael ei ddarparu drwy diwb i lawr y llwnc.

Notes: Mewn cyd-destunau llai technegol, mae'n bosibl y byddai 'cymorth anadlu drwy diwb' yn fwy addas.

Last Updated: 5 June 2020

English: invasive ventilator bed

Welsh: gwely lle darperir cymorth anadlu mewnwthiol

Status B

Subject: Health

Part of speech: Noun, Masculine, Singular

Last Updated: 21 May 2020

English: invasive ventilator bed

Welsh: gwely lle darperir cymorth anadlu mewnwthiol

Status B

Subject: Health

Part of speech: Noun, Masculine, Singular

Last Updated: 21 May 2020

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