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geiriadur

lexicon

NounMasculine (gwrywaidd)C1/ɡei̯rˈjadɨ̞r/

"geiriadur" means "lexicon" in Welsh (masculine noun). Pronounced /ɡei̯rˈjadɨ̞r/. Mutation forms: Treiglad Meddal → eiriadur, Treiglad Trwynol → ngeiriadur.

Mutation forms

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

MutationForm
Base formgeiriadur
Treiglad Meddaleiriadur
Treiglad Trwynolngeiriadur

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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