noun
1.
the quality or state of being enfeebled and weakened in health
suffering from old age and attendant physical infirmity
Synonyms: debility, decrepitude, disease, feebleness, infirmness, malaise, sickliness, unhealthiness; compare disease 1, sickness 1
Related Word: debilitation, decay, enfeeblement, failing, frailty, weakening, weakness; diseasedness, unwellness; illness, indisposition, sickness, unhealth
Antonyms: haleness
2.
Synonyms: disease 1, affection, ailment, complaint, condition, disorder, ill, malady, sickness, syndrome
3.
Synonyms: sickness 1, affliction, diseasedness, disorder, illness, indisposition, unhealth