nionyn

== Welsh == === Alternative forms === gwynwynyn, oinionyn, onionyn, winionyn, winiwnyn, wnionyn, winwnsyn, wynwynyn === Etymology === Borrowed from Middle English oinyon. === Noun === nionyn m (plural nionod, not mutable) (North Wales) onion (Allium, esp. Allium cepa) ==== Synonyms ==== (South Wales) winwnsen === Mutation === === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “nionyn”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies