ulai

== Welsh == === Etymology === ul (“moist, damp”) +‎ -ai === Pronunciation === (North Wales) IPA(key): /ˈɨ̞lai̯/ (South Wales) IPA(key): /ˈiːlai̯/, /ˈɪlai̯/ === Noun === ulai m or f (uncountable) (obsolete) hydrogen Synonyms: hydrogen, ulnwy ==== Related terms ==== blorai (“nitrogen”) callestrai (“silicon”) ufelai (“oxygen”) === Mutation === === References === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “ulai”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies