gwyll

== Welsh == === Etymology === Perhaps related to tywyll (“dark”). === Pronunciation === (North Wales) IPA(key): /ɡwɨ̞ɬ/ (South Wales) IPA(key): /ɡʊi̯ɬ/, /ɡwɪɬ/ === Noun === gwyll m (plural gwyllon) (literary) darkness (literary) twilight ==== Derived terms ==== gwyllgi rhwng gwyll a gwawl === Mutation === === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “gwyll”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies