From Proto-Tai *wɤjᴬ (“fire”). Cognate with Thai ไฟ (fai), Northern Thai ᨼᩱ (fai), Lao ໄຟ (fai), Lü ᦺᦝ (fay), Shan ၽႆး (phái) or ၾႆး (fái), Tai Nüa ᥜᥭᥰ (fäy), Zhuang feiz, Bouyei fix, Saek วี๊.
ꪼꪡ (fai)