From Proto-Tai *ʔajᴬ (“to cough”). Cognate with Thai ไอ (ai), Lü ᦺᦀ (˙ʼay), Shan ဢႆ (ʼǎi), Ahom 𑜒𑜩 (ʼay), Zhuang ae, Saek ไอ๋.
ໄອ • (ʼai) (abstract noun ການໄອ)