- weariness of body or mind from strain, oppressive climate, etc.; lack of energy; listlessness; languor.
- a condition of indolent indifference.
1533, from M.Fr. lassitude, from L. lassitudinem (nom. lassitudo) "faintness, weariness," from lassus "faint, tired, weary," from PIE base *lad- "slow, weary" (cf. O.E. læt "sluggish, slow;" see late (adj.)).
"If I broke up with these girls, it was more out of a sense of discouragement, of lassitude: I just didn't feel up to maintaining a relationship, and I didn't want to disappoint them or lead them on."
- Michel Houellebecq, as translated by Lorin Stein, Submission