From Proto-Tai *cetᴰ (“seven”), from Middle Chinese 七 (MC t͡sʰiɪt̚, “seven”). Cognate with Thai เจ็ด (jèt), Lao ເຈັດ (chet), Lü ᦵᦈᧆ (ṫsed), Shan ၸဵတ်း (tsét), Tai Nüa ᥓᥥᥖᥱ (tsět), Ahom 𑜋𑜢𑜄𑜫 (chit), Bouyei xadt, Zhuang caet, Nong Zhuang jiat.
ꪹꪊꪸꪒ (transliteration needed)