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iaith

language

NounFeminine (benywaidd)A1/jai̯θ/

"iaith" means "language" in Welsh (feminine noun). Pronounced /jai̯θ/. Mutation forms: Treiglad Llaes → hiaith.

Mutation forms

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

MutationForm
Base formiaith
Treiglad Llaeshiaith

"iaith" in context

Iaith hardd yw'r Gymraeg.

Welsh is a beautiful language.

B1

Dw i'n gallu deall dy iaith di.

I can understand your language.

A1

Nid yw un iaith byth yn ddigon.

One language is never enough.

A1

Ysgrifennodd Alexander frawddegau yn yr iaith Ferber.

Alexander wrote sentences in the Berber language.

B1

Gall berson dwyieithog newid o un iaith i iaith arall yng nghanol frawddeg, ac mae'r cyfnewid-cod hwn yn bwnc astudio i ieithyddion.

A bilingual person can change from one language to another in the middle of a sentence, and this code-switching is a topic of study for linguists.

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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