Synonyms: phlegm, lethargy, languor, sluggishness, flatness
Definition: inactivity; showing an unusual lack of energy
Usage: the general appearance of sluggishness alarmed his friends
Similar words: inactiveness, inactivity, inertia
Definition: a disposition to remain inactive or inert
Usage: he had to overcome his inertia and get back to work
Synonyms: inanition, lethargy, lassitude, slackness
Definition: weakness characterized by a lack of vitality or energy
Similar words: weakness
Definition: the property of lacking physical or mental strength; liability to failure under pressure or stress or strain
Usage: his weakness increased as he became older; the weakness of the span was overlooked until it collapsed
Synonyms: lethargy, lassitude, sluggishness
Definition: a state of comatose torpor (as found in sleeping sickness)
Similar words: torpidity, torpor
Definition: a state of motor and mental inactivity with a partial suspension of sensibility
Usage: he fell into a deep torpor