From Proto-Katuic *bəɲ, from Proto-Mon-Khmer *dpəɲ ~ *[d]pu[ə]ŋ ~ *tbiɲ ~ *tbiiɲ ~ *tbiəɲ ~ *tbəɲ (“full”). Cognate with Khmer ពេញ (pɨñ), Bahnar 'bĕnh (“full”), Mon ပေၚ်.
pânh