lethargy

Definition from Wiktionary, a free dictionary

[edit] English

[edit] Etymology

From Ancient Greek ληθαργία (lēthargia), “‘drowsiness’”) from λήθαργος (lēthargos), “‘forgetful, lethargic’”) from λήθη (lēthē), “‘forgetfulness’”) + ἀργός (argos), “‘not working’”).

[edit] Noun

Wikipedia

lethargy (plural lethargies)

1. A state of fatigue, sluggishness, lassitude and inactivity
2. A state of apathy with lack of emotion or interest
3. A state of comatose torpor (as found in sleeping sickness)