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achlysur

cause

NounMasculine (gwrywaidd)B2/aχˈləsɨ̞r/

"achlysur" means "cause" in Welsh (masculine noun). Pronounced /aχˈləsɨ̞r/. Mutation forms: Treiglad Llaes → hachlysur.

Mutation forms

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

MutationForm
Base formachlysur
Treiglad Llaeshachlysur

"achlysur" in context

Roedd bob amser yn cymryd yr achlysur mwyaf ffurfiol ac yn ei ddefnyddio i'w helpu nhw a phobl eraill i deimlo'n ddynol ac yn wresog.

He always took the most formal occasion and used it to help them and others feel human and warm.

B2

Rwy'n cofio un achlysur pan oeddem ni'n eistedd ar y rhes gefn yn yr hen Siambr, ac edrychais drosodd atoch chi yn siarad, Vikki, ac yna at Hefin, a oedd yn edrych arnoch chi.

I remember one occasion when we sat on the back row in the old Siambr, and I looked over to you speaking, Vikki, and then to Hefin, who was looking at you.

C1

Rwy'n credu bod hwn yn un achlysur o'r fath, sy'n darparu manteision sylweddol i Gymru.

I really believe this is one such occasion, delivering substantive benefits for Wales.

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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