From Proto-Tai *C̬.lɯmᴬ (“wind”). Cognate with Thai ลม (lom), Northern Thai ᩃᩫ᩠ᨾ, Lao ລົມ (lom), Lü ᦟᦳᧄ (lum), Shan လူမ်း (lúum), Ahom 𑜎𑜤𑜪 (lum), Zhuang rumz. Compare Sui luml (“wind”) and Old Chinese 風 (OC *plum, “wind”)
rumx