neidr ddu

== Welsh == === Etymology === From neidr (“snake”) and du (“black”). === Pronunciation === (cy) IPA(key): /ˌnei̯dr ˈðɨː/ (South Wales, cy, colloquial) IPA(key): /ˌnei̯dɪr ˈðɨː/ (South Wales, cy, colloquial) IPA(key): /ˌnei̯dɪr ˈðiː/ === Noun === neidr ddu f (plural nadroedd duon or nadredd duon, not mutable) adder, common European adder (Vipera berus) Synonym: gwiber === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “neidr ddu”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies