illness

1 an abnormal state that disrupts a plant's or animal's normal bodily functioning suffered from a mysterious illness that left her weak and tired all the time Synonyms affection, ail, ailment, bug, complaint, complication, condition, disorder, distemper, distemperature, fever, ill, disease, infirmity, 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 condition of not being in good health prone to illness as a child, he was sent to a western ranch with the expectation that it would toughen him up Synonyms sickness, indisposition, unhealthiness, unsoundnessRelated Words malaise, sickishness; affliction, ailment, condition, disease, disorder, dysfunction (also disfunction), malady, trouble, upset; debility, decrepitude, feebleness, frailness, infirmity, invalidism, invalidity, lameness, sickliness, weakliness, weakness; hypochondriaNear Antonyms comeback, convalescence, healing, mending, rally, recovery, recuperation, rehab, rehabilitation, snapback; fettle, fitness, shape; hardiness, heartiness, lustiness, robustness, ruggedness, stamina, strength, toughness, vigor, vigorousness, vitality; bloom, flush, flushness; weal, welfare, well-beingAntonyms health, healthiness, soundness, wellness, wholeness, wholesomeness