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clefyd

disease

NounMasculine (gwrywaidd)C1/ˈklɛvɨ̞d/

"clefyd" means "disease" in Welsh (masculine noun). Pronounced /ˈklɛvɨ̞d/. Mutation forms: Treiglad Meddal → glefyd, Treiglad Trwynol → nghlefyd, Treiglad Llaes → chlefyd.

Mutation forms

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

MutationForm
Base formclefyd
Treiglad Meddalglefyd
Treiglad Trwynolnghlefyd
Treiglad Llaeschlefyd

"clefyd" in context

Mae clefyd y gwair arnaf i.

I have hay fever.

B1

A'r un diweddaraf, wrth gwrs, yw'r driniaeth ar gyfer clefyd Huntington.

And the most recent one, of course, is the treatment for Huntington's disease.

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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therapy

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death

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