From Proto-Tai *qraj (“egg”). Cognate with Thai ไข่ (kài), Lao ໄຂ່ (khai), Tai Dam ꪼꪎ꪿, Lü ᦺᦃᧈ (ẋay¹), Shan ၶႆႇ (khài), Khamti ၵဲ, Ahom 𑜁𑜩 (khay), Tày xáy, Bouyei jais, Zhuang gyaeq.
ᨡᩱ᩵ • (khai)