noun
1.
physical and mental inertness
disgusted, he sank into a state of lethargy
Synonyms: coma, dullness, hebetude, languor, lassitude, sleep, slumber, stupor, torpidity, torpidness, torpor
Related Word: comatoseness, sluggishness; indolence, laziness, sloth, slothfulness; idleness, inactivity, inertia, inertness, passiveness, supineness; apathy, impassivity, inanition, phlegm
Contrasted words: aptness, promptness, quickness, readiness; alertness, quick-wittedness
Antonyms: vigor
2.
Synonyms: apathy 2, disinterest, disregard, heedlessness, indifference, insouciance, lassitude, listlessness, unconcern, unmindfulness