lassitude

1 a complete depletion of energy or strength our lassitude was such that we couldn't even be bothered to get more soda from the fridge Synonyms burnout, collapse, exhaustion, frazzle, fatigue, prostration, tiredness, wearinessRelated Words debilitation, debility, disablement, enervation, enfeeblement, faintness, feebleness, frailness, frailty, impotence, infirmity, weakness; overfatigue; languor, lethargy, listlessness; sluggishness, slumber, stupor, torpidity, torpor; apathy, inertia, passiveness, passivityNear Antonyms bounce, dash, drive, energy, ginger, go, liveliness, pep, punch, sap, snap, starch, verve, vigor, vim, vitality, zing, zip; might, muscle, potency, power, puissance, strength; briskness, jauntiness, spiritedness, sprightliness, vivaciousness, vivacityAntonyms refreshment, rejuvenation, rejuvenescence, revitalization

2 physical or mental inertness as his cancer progresses, his days are increasingly marked by lassitude and isolation from the outside world Synonyms hebetude, languor, lethargy, listlessness, stupor, torporRelated Words boredom, indifference; malaise; laziness; fatigue, sleepiness; narcosis; idleness, inactionNear Antonyms eagerness, enthusiasm, keenness, spiritedness; ambition, enterpriseAntonyms vigor, vim, vitality, vivacity