From Proto-Southwestern Tai *piːᴬ¹ (“year”), from Proto-Tai *piːᴬ (“year”). Cognate with Thai ปี (bpii), Northern Thai ᨸᩦ, Lao ປີ (pī), Lü ᦔᦲ (ṗii), Shan ပီ (pǐi), Phake ပီ (pī), Ahom 𑜆𑜣 (pī), Zhuang bi, Bouyei bil.
ᥙᥤ (pi) (1963 orthography ᥙᥤ)