weakness

1 the quality or state of lacking physical strength or vigor the flu left me with such overwhelming weakness that I could hardly stand Synonyms asthenia, debilitation, debility, delicacy, enervation, enfeeblement, faintness, feebleness, fragility, frailness, frailty, infirmity, languidness, languor, listlessness, lowness, wimpiness Related Words decay, decrepitude; breakdown, collapse, prostration; exhaustion, fatigue, lassitude, weariness; defenselessness, helplessness, impotence, impuissance, powerlessness; effeteness, softness, tenderness; disablement, incapacitation, invalidism; damage, harm, hurt, impairment, injury Near Antonyms energy, vitality; brawniness, fitness, heftiness, huskiness, lustiness, muscularity, virility; hardness, ruggedness, stoutness, sturdiness, toughness; health, healthiness, soundness, wellness Antonyms hardihood, hardiness, robustness, strength, vigor

2 the quality or state of lacking strength of will or character in a moment of weakness he shoplifted the comic book Synonyms frailness, frailty, softness, spinelessness, wimpiness, wimpishness, wishy-washiness Related Words collapse; failing, flaw, foible, peccadillo; evil, immorality, wickedness; corruption, corruptness Near Antonyms discipline, self-discipline; goodness, integrity, morality, rectitude, righteousness, rightness, uprightness, virtuousness Antonyms backbone, chutzpah (also chutzpa or hutzpah or hutzpa), firmness, fortitude, hardihood, mettle, moxie, nerve, resoluteness, strength, toughness

3 a defect in character his one weakness is his cockeyed optimism about everything Synonyms demerit, dereliction, failing, foible, frailty, shortcoming, sin, vice, want, faultRelated Words blot, spot, stain; blemish, deficiency, flaw, imperfection, minus, nit; Achilles' heel, soft spot; corruption, depravity, evil, immorality, sinfulness, wickednessNear Antonyms excellence, perfection; goodness, integrity, morality, probity, rectitude, righteousnessAntonyms merit, virtue

4 the quality or state of having little resistance to some outside agent the devastating weakness of the immune system that is experienced by people with AIDS Synonyms defenselessness, vulnerability, susceptibilityRelated Words helplessness, powerlessness; passiveness, passivity; feebleness, frailness, frailty, infirmity; exposure, liability, openness, predisposition, proneness, sensitivity; receptiveness, receptivity; easiness, gullibility, naïveté (also naivete or naiveté); credulity, credulousnessNear Antonyms immunity; impenetrability, indomitability, indomitableness, invincibilityAntonyms invulnerability