lethargy
(noun)
noun
1. a state of comatose torpor (as found in sleeping sickness)
Similar word(s): lassitude, sluggishness
Definition categories: state, torpidity, torpor
2. weakness characterized by a lack of vitality or energy
Similar word(s): inanition, lassitude, slackness
Definition categories: attribute, weakness
3. inactivity; showing an unusual lack of energy
Similar word(s): flatness, languor, phlegm, sluggishness
Definition categories: attribute, inactivity, inertia