Meaning

verb lose vigor, health, or flesh, as through grief

verb have a desire for something or someone who is not present

verb become feeble

originFrom Middle English languysshen, from the present participle stem of Anglo-Norman and Middle French languir, from Late Latin languīre, alteration of Latin languēre (“to be faint, unwell”). : Compare languor, languid and lax. : Cognate with slack.

Etymology from Wiktionary, CC BY-SA 3.0