infirmity

1 an abnormal state that disrupts a plant's or animal's normal bodily functioning an 18th-century quack who specialized in those mysterious infirmities that are known only to the idle rich Synonyms affection, ail, ailment, bug, complaint, complication, condition, disorder, distemper, distemperature, fever, ill, illness, disease, malady, sickness, troubleRelated Words contagion, contagious disease; contagium, infection; attack, bout, fit, spell; debility, decrepitude, feebleness, frailness, lameness, sickliness, unhealthiness, unsoundness, unwellness, weakness; malaise, matter, pip; epidemic, pest, pestilence, plagueNear Antonyms fitness, healthiness, heartiness, robustness, soundness, wholeness, wholesomeness; fettle, shapeAntonyms health, wellness

2 the quality or state of lacking physical strength or vigor a period of infirmity left the athlete completely out of shape Synonyms asthenia, debilitation, debility, delicacy, enervation, enfeeblement, faintness, feebleness, fragility, frailness, frailty, weakness, languidness, languor, listlessness, lowness, wimpinessRelated 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, injuryNear Antonyms energy, vitality; brawniness, fitness, heftiness, huskiness, lustiness, muscularity, virility; hardness, ruggedness, stoutness, sturdiness, toughness; health, healthiness, soundness, wellnessAntonyms hardihood, hardiness, robustness, strength, vigor