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iach

healthy

AdjectiveB2/jaːχ/

"iach" means "healthy" in Welsh (adjective). Pronounced /jaːχ/. Mutation forms: Treiglad Llaes → hiach.

Mutation forms

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

MutationForm
Base formiach
Treiglad Llaeshiach

"iach" in context

Dywedodd Mary mae hi'n iach.

Mary said she's healthy.

B2

Mae'n gwneud gwahaniaeth gwirioneddol i ansawdd bywydau pobl drwy sicrhau bod eu cartrefi'n iach, yn gyfforddus ac yn fforddiadwy i'w gwresogi.

It makes a real difference to the quality of people's lives by ensuring that their homes are healthy, comfortable and affordable to heat.

B2

Dyma'r pethau sy'n ei gwneud hi'n llawer anos i ni fod yn hapus ac yn iach fel plant.

These are the things that make it so much harder for us to be happy and healthy as children.

B2

Maent yn ei gwneud hi'n llawer anos i ni fod yn hapus ac yn iach trwy gydol ein bywydau.

They make it so much harder for us to be happy and healthy throughout our entire lives.

B2

Nid yw hon yn ddadl iach.

This is not a healthy debate.

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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live

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dead

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strong

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illegal

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