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Dydd Llun

Monday

NounMasculine (gwrywaidd)A1

"Dydd Llun" means "Monday" in Welsh (masculine noun). Mutation forms: Treiglad Meddal → ddydd Llun, Treiglad Trwynol → nydd Llun.

Mutation forms

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

MutationForm
Base formDydd Llun
Treiglad Meddalddydd Llun
Treiglad Trwynolnydd Llun

"Dydd Llun" in context

Do, gwnes i frecwast blasus bore dydd Llun.

Yes, I made a delicious breakfast Monday morning.

B2

Dan ni'n gwneud hyn bob dydd Llun.

We do this every Monday.

A2

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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Related Welsh words

Dydd Mawrth

Tuesday

Dydd Mercher

Wednesday

Dydd Iau

Thursday

Dydd Gwener

Friday

Dydd Sadwrn

Saturday

Dydd Sul

Sunday

wythnos

week

cloc

clock

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