blas.
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glas

blue

AdjectiveA1/ɡlaːs/

“glas” means “blue” in Welsh (adjective). Pronounced /ɡlaːs/. Mutation forms: Treiglad Meddal → las, Treiglad Trwynol → nglas.

Mutation forms

In Welsh, the first letter of “glas” changes depending on the grammatical context. These are the mutated forms:

MutationForm
Base formglas
Treiglad Meddallas
Treiglad Trwynolnglas

“glas” in context

Mae gan Barbie wallt melyn a llygaid glas.

Barbie has blond hair and blue eyes.

B1

Roedd Sami yn gwisgo crys glas.

Sami was wearing a blue shirt.

A2

Ga i fenthyg dy naddwr glas?

May I borrow your blue sharpener?

A1

Fodd bynnag, fe wnawn ein gorau glas i gyflawni'r gwaith mor effeithiol ag y gallwn o fewn y cyfyngiadau hyn.

However, we will do our best to conduct this work as effectively as we can within these constraints.

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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Related Welsh words

gwyn

white

du

black

coch

red

brown

brown

melyn

yellow

gwyrdd

green

porffor

purple

tywyll

dark

blas.
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