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celwydd

lie

NounMasculine (gwrywaidd)C2/ˈkɛlwɨ̞ð/

"celwydd" means "lie" in Welsh (masculine noun). Pronounced /ˈkɛlwɨ̞ð/. Mutation forms: Treiglad Meddal → gelwydd, Treiglad Trwynol → nghelwydd, Treiglad Llaes → chelwydd.

Mutation forms

In Welsh, the first letter of "celwydd" changes depending on the grammatical context. These are the mutated forms:

MutationForm
Base formcelwydd
Treiglad Meddalgelwydd
Treiglad Trwynolnghelwydd
Treiglad Llaeschelwydd

"celwydd" in context

Peidiwch â dweud celwydd!

Don't tell lies!

B1

Ceir yr holl bobl hynny sy'n dweud wrthych chi am fwynhau eich cwsg a'r holl wahanol heriau y byddwch chi'n eu hwynebu, ac yna pan fydd yn digwydd, rydych chi'n sylweddoli nad oedden nhw'n dweud celwydd wrthych chi.

There are all of those people who tell you about enjoying your sleep and all the different challenges you'll have, and then when it happens, you realise that they weren't lying to you.

C1

Rwy'n parchu gwahanol farn o fewn y Siambr hon, ond nid yw'r ystadegau yn dweud celwydd.

I respect different opinions within this Chamber, but the statistics simply do not lie.

B2

Further reading

Welsh Mutations Explained — Soft, Nasal & Aspirate →Welsh Pronunciation — It's Actually Easier Than English →How to Learn Welsh as an Adult — A Step-by-Step Roadmap →Best Apps to Learn Welsh (2026) →Browse all Welsh vocabulary →

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