From Proto-Tai *hwaːjᴬ (“dam”). Cognate with Thai ฝาย (fǎai), Northern Thai ᨺᩣ᩠ᨿ, Lü ᦚᦻ (ḟaay), Shan ၽၢႆ (phǎai) or ၾၢႆ (fǎai), Bouyei waail, Zhuang fai.
ຝາຍ • (fāi)