From Proto-Tai *haːᶜ (“five”), from Old Chinese 五 (OC *ŋaːʔ, “five”). Cognate with Thai ห้า (hâa), Northern Thai ᩉ᩶ᩣ, Lao ຫ້າ (hā), Lü ᦠᦱᧉ (ḣaa2), Tai Dam ꪬ꫁ꪱ, Shan ႁႃႈ (hāa), Ahom 𑜑𑜡 (haa), Zhuang haj.
ᥞᥣᥲ (haa4) (old orthography ᥞᥣˋ)