torpor

Definitions

A state of physical or mental inactivity; lethargy.

A state of decreased physiological activity in an animal, usually characterized by a reduced body temperature and metabolic rate.

Examples

The bear remained in a state of deep torpor throughout the long, freezing winter.

After the heavy meal, a sudden torpor overcame him, making it impossible to stay awake.

Synonyms

lethargy apathy languor stupor inertia sluggishness idleness

Antonyms

energy vigor vitality animation liveliness enthusiasm alertness