From Proto-Tai *k.reːŋᴬ (“hard”). Cognate with Thai แข็ง (kɛ̌ng), Lao ແຂງ (khǣng), Lü ᦶᦃᧂ (ẋaeng), Shan ၶႅင် (khǎeng), Ahom 𑜁𑜢𑜂𑜫 (khing).
ꪵꪄꪉ (transliteration needed)