cachexia
cachexy
chronic ill health
debilitation
debility
decrepitude
delicacy
delicate health
enervation
exhaustion
feebleness
fragility
frailty
healthlessness
hypochondria
hypochondriasis
infirmity
invalidism
invalidity
languishing
languishment
morbidity
morbidness
peakedness
poor health
sickliness
unhealthiness
unsoundness
unwholesomeness
valetudinarianism
wasting
weakliness