TermCymru

Results are displayed in Welsh alphabetical order A-Y
Welsh: Tremarchog
English: St Nicholas
Status A
Subject: Place-names
Part of speech: Proper noun
Definition: Yn Sir Benfro.
Last updated: 9 December 2004
Welsh: Tremeirchion
English: Tremeirchion
Status A
Subject: Place-names
Part of speech: Proper noun
Notes: Ward etholiadol yn Sir Ddinbych. Dyma'r enwau a ragnodwyd yn Gymraeg a Saesneg ar gyfer y ward yng Ngorchymyn Sir Ddinbych (Trefniadau Etholiadol) 2021.
Last updated: 17 August 2022
Welsh: Trenau Arriva Cymru
English: Arriva Trains Wales
Status C
Subject: Transport
Part of speech: Noun, Plural
Definition: ATW
Last updated: 26 July 2004
Welsh: Trenau Arriva Cymru
English: ATW
Status C
Subject: Transport
Part of speech: Noun, Plural
Definition: Arriva Trains Wales
Last updated: 28 February 2008
Welsh: Trenau Bach Arbennig Cymru
English: Great Little Trains of Wales
Status A
Subject: Tourism and leisure
Part of speech: Proper noun
Context: Rheilffordd Tal-y-llyn yw'r rheilffordd gyntaf yn y byd i gel ei gwarchod ac mae'n un o Drenau Bach Arbennig Cymru.
Last updated: 1 August 2018
Welsh: trenau pŵer
English: power-trains
Status C
Subject: Economic development
Part of speech: Noun, Plural
Definition: An assembly of gears and associated parts by which power is transmitted from an engine to a driving axle.
Last updated: 1 December 2006
Welsh: trend
English: trend
Status B
Subject: ICT
Part of speech: Noun, Masculine, Singular
Last updated: 28 August 2012
Welsh: trendio
English: trending
Status B
Subject: ICT
Part of speech: Verb
Context: On Twitter.
Last updated: 28 August 2012
Welsh: Treorci
English: Treorchy
Status A
Subject: Place-names
Part of speech: Proper noun
Definition: Rhondda Cynon Taf
Last updated: 14 August 2003
Welsh: Treorci
English: Treorchy
Status A
Subject: Place-names
Part of speech: Proper noun
Notes: Ward etholiadol ym Mwrdeistref Sirol Rhondda Cynon Taf. Dyma'r enwau a ragnodwyd yn Gymraeg a Saesneg ar gyfer y ward yng Ngorchymyn Bwrdeistref Sirol Rhondda Cynon Taf (Trefniadau Etholiadol) 2021.
Last updated: 17 August 2022
Welsh: tresgl y moch
English: tormentil
Status C
Subject: Plants
Part of speech: Noun, Masculine, Singular
Definition: Blodyn.
Last updated: 19 August 2010
Welsh: tresi aur
English: laburnum
Status C
Subject: Plants
Part of speech: Noun, Plural
Last updated: 20 August 2008
Welsh: tresmasu troseddol
English: criminal trespass
Status C
Subject: Law
Part of speech: Verb
Last updated: 19 September 2008
Welsh: treth a dalwyd
English: tax paid
Status C
Subject: Personnel
Part of speech: Noun, Feminine, Singular
Last updated: 28 September 2005
Welsh: treth a gesglir gan ACC
English: WRA-collected tax
Status A
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Plural: trethi a gesglir gan ACC
Context: Ystyr “treth a gesglir gan ACC” (“WRA-collected tax”) yw (a) treth ddatganoledig, neu (b) yr ardoll ymwelwyr.
Notes: Daw'r frawddeg gyd-destunol o Fil Llety Ymwelwyr (Cofrestr ac Ardoll) Etc. (Cymru) 2025. 'Welsh Revenue Authority' / 'Awdurdod Cyllid Cymru' yw'r acronymau yn yr ymadroddion hyn.
Last updated: 11 November 2024
Welsh: Treth Allyriadau Carbon
English: CET
Status B
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Notes: Dyma'r acronym a ddefnyddir yn Saesneg am Carbon Emissions Tax.
Last updated: 23 December 2020
Welsh: treth anabledd
English: disability tax
Status C
Subject: Health
Part of speech: Noun, Feminine, Singular
Context: Mae'r adroddiad Prin yn Goroesi, a gyhoeddwyd gan Anabledd Cymru yn 2023, yn amlinellu effaith yr argyfwng costau byw ar bobl anabl yng Nghymru a'r “[costau] unigryw a brofir gan bobl anabl neu gostau sy'n fwy hanfodol i bobl anabl” – cyfeirir yn gymdeithasol at hyn fel ‘treth anabledd’ weithiau.
Last updated: 7 November 2024
Welsh: treth anuniongyrchol
English: indirect tax
Status B
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Plural: trethi anuniongyrchol
Last updated: 18 February 2026
Welsh: treth ar damponau
English: tampon tax
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Last updated: 25 February 2021
Welsh: treth ar dir gwag
English: vacant land tax
Status B
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Last updated: 3 June 2026
Welsh: Treth ar Drafodiadau sy'n Ymwneud â Buddiannau mewn Tir
English: Tax on Transactions involving interests in Land
Status A
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Definition: TTiiL
Last updated: 9 September 2014
Welsh: Treth ar Drafodiadau sy'n Ymwneud â Buddiannau mewn Tir
English: TTiiL
Status A
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Definition: Tax on Transactions involving interests in Land
Last updated: 9 September 2014
Welsh: treth ar werth
English: value added tax
Status B
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Notes: Defnyddir yr acronym VAT yn Saesneg a TAW yn Gymraeg.
Last updated: 31 July 2024
Welsh: treth car
English: vehicle excise duty
Status C
Subject: Transport
Part of speech: Noun, Feminine, Singular
Last updated: 7 February 2008
Welsh: trethdalwr
English: taxpayer
Status C
Subject: Finance and statistics
Part of speech: Noun, Masculine, Singular
Last updated: 9 July 2008
Welsh: trethdalwr annomestig
English: non-domestic ratepayer
Status C
Subject: Housing
Part of speech: Noun, Masculine, Singular
Last updated: 16 February 2004
Welsh: trethdalwr Cymreig
English: Welsh taxpayer
Status A
Subject: Law
Part of speech: Noun, Masculine, Singular
Last updated: 28 May 2014
Welsh: treth ddatganoledig
English: devolved tax
Status A
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Last updated: 28 May 2014
Welsh: treth dirlenwi
English: landfill tax
Status A
Subject: Waste
Part of speech: Noun, Feminine, Singular
Definition: LfT
Last updated: 28 May 2014
Welsh: treth dirlenwi
English: LfT
Status A
Subject: Waste
Part of speech: Noun, Feminine, Singular
Definition: landfill tax
Last updated: 3 September 2014
Welsh: treth dirlenwi
English: LfT
Status A
Subject: Waste
Part of speech: Noun, Feminine, Singular
Definition: landfill tax
Last updated: 9 September 2014
Welsh: Treth Dirlenwi Cymru
English: Welsh Landfill Tax
Status A
Subject: Waste
Part of speech: Noun, Feminine, Singular
Definition: WLfT
Last updated: 9 September 2014
Welsh: Treth Dirlenwi Cymru
English: WLfT
Status A
Subject: Waste
Part of speech: Noun, Feminine, Singular
Definition: Welsh Landfill Tax
Last updated: 9 September 2014
Welsh: treth dir y dreth stamp
English: SDLT
Status A
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Definition: Stamp duty land tax.
Context: The "stamp duty land tax" (SDLT) was a new tax in land transactions that was introduced by the Finance Act 2003. It largely replaced stamp duty with effect from 1 December 2003. SDLT is not a stamp duty, but a form of self-assessed transfer tax charged on "land transactions".
Last updated: 20 January 2010
Welsh: treth dir y dreth stamp
English: stamp duty land tax
Status A
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Definition: Stamp duty land tax.
Context: The "stamp duty land tax" (SDLT) was a new tax in land transactions that was introduced by the Finance Act 2003. It largely replaced stamp duty with effect from 1 December 2003. SDLT is not a stamp duty, but a form of self-assessed transfer tax charged on "land transactions".
Last updated: 20 January 2010
Welsh: treth drafodiadau
English: transaction tax
Status A
Subject: Law
Part of speech: Noun, Feminine, Singular
Context: Land
Last updated: 28 May 2014
Welsh: treth eiddo
English: property tax
Status C
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Last updated: 20 January 2006
Welsh: treth enillion cyfalaf
English: capital gains tax
Status B
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Last updated: 26 November 2024
Welsh: treth etifeddiant
English: inheritance tax
Status B
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Last updated: 26 November 2024
Welsh: treth ffawdelw
English: windfall tax
Status B
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Plural: trethi ffawdelw
Definition: Treth a godir ar elw nas rhagwelwyd, neu sy'n annisgwyl o fawr.
Last updated: 10 February 2022
Welsh: treth gorfforaeth
English: corporation tax
Status C
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Last updated: 2 August 2006
Welsh: Treth Gwarediadau Tirlenwi
English: Landfill Disposals Tax
Status B
Subject: Environment
Part of speech: Noun, Feminine, Singular
Definition: LDT
Last updated: 5 March 2015
Welsh: treth gyfeintiol unffurf
English: uniform volumetric tax
Status A
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Plural: trethi cyfeintiol unffurf
Last updated: 29 December 2017
Welsh: treth gyfrannol
English: proportional tax
Status B
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Plural: trethi cyfrannol
Definition: Treth nad yw ei chyfradd yn newid wrth i'r swm trethadwy gynyddu.
Notes: Dyma'r gwrthwyneb i dreth raddoledig ('graduated tax') lle mae'r gyfradd naill ai'n cynyddu wrth i'r swm trethadwy gynyddu (treth gynyddraddol) neu'n gostwng wrth i'r swm trethadwy gynyddu (treth ostyngraddol).
Last updated: 18 September 2024
Welsh: treth gynyddraddol
English: progressive tax
Status B
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Plural: trethi cynyddraddol
Definition: Treth y mae ei chyfradd yn cynyddu wrth i'r swm trethadwy gynyddu.
Notes: Dyma'r term yn yr ystyr dechnegol a nodir yn y diffiniad. Gellir defnyddio'r ymadrodd 'progressive tax' mewn ystyr annhechnegol hefyd, i olygu treth sy'n hyrwyddo tegwch; os mai'r ystyr honno sydd dan sylw, gall 'treth flaengar' neu 'treth deg' fod yn fwy addas.
Last updated: 27 January 2025
Welsh: treth gywirol
English: corrective tax
Status A
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Plural: trethi cywirol
Context: Mae Griffith et al. (2017) wedi dadlau bod modd defnyddio'r amrywiaeth hwn lle bo defnyddwyr yn dewis cynhyrchion gwahanol er mwyn gwella dyluniad trethi cywirol.
Last updated: 29 December 2017
Welsh: Trethi a Budd-daliadau Lleol
English: Local Taxation and Benefits
Status A
Subject: Education
Part of speech: Noun, Plural
Context: Apprenticeship learning pathway.
Last updated: 31 October 2012
Welsh: trethiant a threthiant gohiriedig
English: taxation and deferred taxation
Status C
Subject: Finance and statistics
Part of speech: Noun, Masculine, Singular
Last updated: 16 July 2002
Welsh: trethiant buddiannau
English: benefit taxation
Status C
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Context: Fel egwyddor sylfaenol, mae’r OECD yn nodi y dylai llywodraethau is-genedlaethol ddibynnu ar “drethiant buddiannau” megis trethi sy’n creu cyswllt rhwng y trethi a delir a’r gwasanaethau cyhoeddus a ddarperir.
Last updated: 5 July 2017
Welsh: trethiant domestig
English: domestic taxation
Status A
Subject: Finance and statistics
Part of speech: Noun, Plural
Context: Yn ei Strategaeth Fyd-eang, mae Sefydliad Iechyd y Byd yn galw ar Aelod-wladwriaethau i sefydlu system trethiant domestig i leihau defnydd niweidiol o alcohol.
Last updated: 29 December 2017