Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun lethargy

3 senses of lethargy

Sense 1
lethargy, lassitude, sluggishness -- (a state of comatose torpor (as found in sleeping sickness))
       => torpor, torpidity -- (a state of motor and mental inactivity with a partial suspension of sensibility; "he fell into a deep torpor")

Sense 2
inanition, lassitude, lethargy, slackness -- (weakness characterized by a lack of vitality or energy)
       => weakness -- (the property of lacking physical or mental strength; liability to failure under pressure or stress or strain; "his weakness increased as he became older"; "the weakness of the span was overlooked until it collapsed")

Sense 3
languor, lethargy, sluggishness, phlegm, flatness -- (inactivity; showing an unusual lack of energy; "the general appearance of sluggishness alarmed his friends")
       => inactiveness, inactivity, inertia -- (a disposition to remain inactive or inert; "he had to overcome his inertia and get back to work")