languid (adj.)

1590s, from Middle French languide (16c.) and directly from Latin languidus "faint, listless, and sluggish from weakness, fatigue, or want of energy," from languere "be weak, be fatigued, be faint, be listless," from PIE *langu-, from root *sleg- "be slack, be languid." Related: Languidly; languidness.