From Proto-Tai *biːᴮ (“older sibling”). Cognate with Thai พี่ (pîi), Northern Thai ᨻᩦ᩵, Lao ພີ່ (phī), Shan ပီႈ (pīi), Ahom 𑜆𑜣 (pī), Zhuang beix, Bouyei bix.
ᦗᦲᧈ • (pii¹)