From Proto-Tai *ruːᴬ (“hole”). Cognate with Thai รู (ruu), Northern Thai ᩁᩪ, Lao ຮູ (hū), Lü ᦣᦴ (huu), Shan ႁူး (húu), Ahom 𑜍𑜥 (rū).
ꪭꪴ (ꞌhú)