From Proto-Tai *wɤjᴬ (“fire”).Cognate with Northern Thai ᨼᩱ (fai), Lao ໄຟ (fai), Lü ᦺᦝ (fay), Tai Dam ꪼꪡ, Tai Dón ꪼꪡ, Tai Daeng ꪼꪡ, Shan ၽႆး (phái) or ၾႆး (fái), Tai Nüa ᥜᥭᥰ (fäy), Phake ၸႝ (phay), Thai ไฟ (fai), Zhuang feiz, Bouyei fix, Saek วี๊. Compare Proto-Be *vəːjᴬ².
𑜇𑜩 (phay)