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derw

oaks

NounMasculine (gwrywaidd)C1/ˈdɛru/

"derw" means "oaks" in Welsh (masculine noun). Pronounced /ˈdɛru/. Mutation forms: Treiglad Meddal → dderw, Treiglad Trwynol → nerw.

Mutation forms

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

MutationForm
Base formderw
Treiglad Meddaldderw
Treiglad Trwynolnerw

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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