From Proto-Tai *piːᴬ (“year”). Cognate with Thai ปี (bpii), Northern Thai ᨸᩦ, Lao ປີ (pī), Shan ပီ (pǐi), Tai Nüa ᥙᥤ (pi), Ahom 𑜆𑜣 (pī), Zhuang bi, Bouyei bil.
ᦔᦲ • (ṗii) (Tai Tham spelling ᨸᩦ)