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diwrnod

a day

NounMasculine (gwrywaidd)A1/ˈdɪu̯rnɔd/

"diwrnod" means "a day" in Welsh (masculine noun). Pronounced /ˈdɪu̯rnɔd/. Mutation forms: Treiglad Meddal → ddiwrnod, Treiglad Trwynol → niwrnod.

Mutation forms

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

MutationForm
Base formdiwrnod
Treiglad Meddalddiwrnod
Treiglad Trwynolniwrnod

When does "diwrnod" mutate?

pum— five (triggers treiglad trwynol)

diwrnod→pum niwrnod(five days)

"diwrnod" in context

Mae hi wedi bod yn bwrw glaw yn ddi-stop am dri diwrnod.

It has been raining nonstop for three days.

B2

Diolch, Heledd, a hoffwn ddiolch i gynghorwyr a swyddogion am eu holl waith yn darparu gwasanaethau y mae pobl leol eu hangen ac yn dibynnu arnynt o un diwrnod i'r llall.

Diolch, Heledd, and I just want to thank councillors and officers for all their work to deliver services that local people need and rely on day in, day out.

B2

Hefyd, rydych chi wedi sôn wrthym ni fod datblygwyr wedi cael diwrnod, neu ddyddiad, ar gyfer cwblhau y gwaith cywiro.

Also, you've mentioned that developers have been given a date to complete the remediation works.

C1

Cystal un oedd Hefin iddo anfon neges destun ataf i, ar ôl y bennod honno, tua diwrnod yn ddiweddarach, i ddweud faint yr oedd wedi mwynhau bod ar Sharp End gyda fi a Llyr.

The calibre of Hefin is that, after that episode, a day or so later, he texted me to say how much he had enjoyed being on Sharp End with myself and Llyr.

C1

Felly, rwy'n gofyn: Prif Weinidog, a yw Llywodraeth Cymru yn cydnabod y niwed y mae polisïau fel y rheol 182 diwrnod, diffyg buddsoddiad o ran hysbysebu a'r ardoll twristiaeth sydd ar y gorwel yn eu gwneud i fusnesau fel hyn?

So, I ask: First Minister, does the Welsh Government recognise the damaging role that policies like the 182-day rule, underinvestment in marketing and the looming tourism levy are having on businesses like these?

C1

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 Llun

Monday

Dydd Mawrth

Tuesday

Dydd Mercher

Wednesday

Dydd Iau

Thursday

Dydd Gwener

Friday

Dydd Sadwrn

Saturday

Dydd Sul

Sunday

wythnos

week

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