From Proto-Tai *qraj (“egg”). Cognate with Thai ไข่ (kài), Northern Thai ᨡᩱ᩵ (khai), Lao ໄຂ່ (khai), Shan ၶႆႇ (khài), Ahom 𑜁𑜩 (khay).
gyaeq (1957–1982 spelling gyəiƽ)