Word Study
lassitude
CIDE DICTIONARY
lassitude, n. [L. lassitudo, fr. lassus faint, weary; akin to E. late: cf. F. lassitude. See Late.].
A condition of the body, or mind, when its voluntary functions are performed with difficulty, and only by a strong exertion of the will; languor; debility; weariness. [1913 Webster]
"The corporeal instruments of action being strained to a high pitch . . . will soon feel a lassitude." [1913 Webster]
OXFORD DICTIONARY
lassitude, n.
1 languor, weariness.
2 disinclination to exert or interest oneself.
1 languor, weariness.
2 disinclination to exert or interest oneself.
Etymology
F lassitude or L lassitudo f. lassus tired
THESAURUS
lassitude
acedia, adynamia, anemia, apathy, atony, blah feeling, bloodlessness, blues, boredom, brain fag, cachexia, cachexy, cowardice, debilitation, debility, depression, disinterest, disregard, doldrums, drowsiness, dullness, dumps, enervation, enfeeblement, ennui, etiolation, exhaustion, eyestrain, faintness, fatigue, feebleness, flabbiness, flaccidity, goneness, heart strain, heaviness, hebetude, heedlessness, impotence, inanimation, indifference, insouciance, jadedness, lackadaisicalness, languidness, languishment, languor, languorousness, lenitude, lentor, lethargy, lifelessness, listlessness, mental fatigue, mental strain, oscitancy, overstrain, overtiredness, passivity, phlegm, powerlessness, prostration, satedness, sleep, sleepiness, sloth, slothfulness, slowness, sluggishness, slumber, softness, somnolence, stance fatigue, strain, strengthlessness, stupefaction, stupor, supineness, tedium, tiredness, torpidity, torpidness, torpitude, torpor, unconcern, unmindfulness, weakliness, weakness, wearifulness, weariness, world-wearinessROGET THESAURUS
lassitude
Fatigue
N fatigue, weariness, yawning, drowsiness, lassitude, tiredness, fatigation, exhaustion, sweat, dyspnoea, anhelation, shortness of breath, faintness, collapse, prostration, swoon, fainting, deliquium, syncope, lipothymy, goneness, fatigued, tired, weary, drowsy, drooping, haggard, toilworn, wayworn:, footsore, surbated, weather-beaten, faint, done up, used up, knocked up, bushed, exhausted, prostrate, spent, overtired, overspent, overfatigued, unrefreshed, unrestored, worn, worn out, battered, shattered, pulled down, seedy, altered, breathless, windless, short of breath, out of breath, short of wind, blown, puffing and blowing, short-breathed, anhelose, broken winded, short-winded, dyspnaeal, dyspnaeic, ready to drop, all in, more dead than alive, dog-weary, walked off one's legs, tired to death, on one's last legs, played out, hors de combat, fatiguing, tiresome, irksome, wearisome, weary, trying.Weariness
N weariness, defatigation, lassitude, drowsiness, disgust, nausea, loathing, sickness, satiety, taedium vitae, boredom, ennui, wearisomeness, tediousness, dull work, tedium, monotony, twice-told tale, bore, buttonholer, proser, wet blanket, pill, stiff, heavy hours, the enemy (time), wearying, wearing, wearisome, tiresome, irksome, uninteresting, stupid, bald, devoid of interest, dry, monotonous, dull, arid, tedious, humdrum, mortal, flat, prosy, prosing, slow, soporific, somniferous, disgusting, unenjoyed, weary, tired, drowsy, uninterested, flagging, used up, worn out, blase, life-weary, weary of life, sick of, wearily, usque ad nauseam, time hanging heavily on one's hands, toujours perdrix, crambe repetita.For further exploring for "lassitude" in Webster Dictionary Online