twyllwr du

== Welsh == === Etymology === From twyllwr (“deceiver”) + du (“black”). === Pronunciation === (North Wales) IPA(key): /ˌtʊɨ̯ɬʊr ˈdɨː/ (South Wales) IPA(key): /ˌtʊi̯ɬʊr ˈdiː/ === Noun === twyllwr du m (plural twyllwyr duon) squid, cuttlefish ==== Synonyms ==== ystifflog môr-lawes pibwr inc === Mutation === === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “twyllwr du”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies