From Proto-Tai *lɯːmᴬ (“to forget”). Cognate with Thai ลืม (lʉʉm), Northern Thai ᩃᩨ᩠ᨾ, Khün ᩃᩨ᩠ᨾ, Lü ᦟᦹᧄ (luem), Tai Dam ꪩꪳꪣ, Shan လိုမ်း (lúem), Ahom 𑜎𑜢𑜤𑜉𑜫 (luem), Zhuang lumz.
ລືມ • (lư̄m)