languor

noun

1. lack of energy or vitality; sluggishness.
2. lack of spirit or interest; listlessness; stagnation.
3. physical weakness or faintness.
4. emotional softness or tenderness.

noun

1. physical or mental laziness or weariness
2. a feeling of dreaminess and relaxation
3. oppressive silence or stillness

n.c.1300, “disease, distress, mental suffering,” from Old French langor “sickness, weakness” (Modern French langueur), from Latin languorem (nominative languor) “faintness, feebleness, lassitude,” from languere “be weak or faint” (see lax). Sense shifted to “faintness, weariness” (1650s) and “habitual want of energy” (1825).