ufelai

== Welsh == === Etymology === From ufel (“fire”) +‎ -ai === Pronunciation === (North Wales) IPA(key): /ɨ̞ˈvɛlai̯/ (South Wales) IPA(key): /ɪˈveːlai̯/, /ɪˈvɛlai̯/ === Noun === ufelai m (uncountable) (obsolete) oxygen ==== Synonyms ==== ocsigen, surbar, ufel, ufelin, ufelnwy ==== Related terms ==== blorai (“nitrogen”) callestrai (“silicon”) ulai (“hydrogen”) === Mutation === === References === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “ufelai”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies