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Definition 2025

gwanwyn m (plural gwanwynau or gwanwyni)

Welsh mutation
radical	soft	nasal	aspirate
gwanwyn	wanwyn	ngwanwyn	unchanged
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.

From Middle Welsh gwaeanhwyn, from Old Welsh guiannuin, from Proto-Brythonic *wesantēnos (compare Cornish gwenton), enlargement of Proto-Celtic *wesantos, oblique case of *wesr- (compare Irish earrach), from Proto-Indo-European *wósr̥ (compare Latin vēr, Lithuanian vãsara, Polish wiosna, Sanskrit वसन्त ‎(vasantá, “spring”), वसर् ‎(vasar, “in the morning”, adverb)).