lethargy

Definitions

A lack of energy and enthusiasm.

A pathological state of sleepiness or deep unresponsiveness and inactivity.

Examples

A deep sense of lethargy overcame him after the long, exhausting hike.

The warm afternoon sun induced a feeling of lethargy that made it difficult to focus on work.

Synonyms

listlessness sluggishness languor inertia apathy torpor lassitude

Antonyms

energy vitality vigor animation enthusiasm liveliness alacrity