From Proto-Tai *ʰreːŋꟲ (“dried up”). Cognate with Thai แห้ง (hɛ̂ɛng), Lao ແຫ້ງ (hǣng), Lü ᦶᦠᧂᧉ (ḣaeng²), Shan ႁႅင်ႈ (hēng), Ahom 𑜑𑜢𑜂𑜫 (hiṅ), Zhuang rengj.
raangx