Definition of torpor:

a state of motor and mental inactivity with a partial suspension of sensibility

Synonyms of torpor:

torpidity, lethargy, sluggishness, listlessness, languor, torpidity, laziness, indolence, dullness, inertia, inactivity

Opposite/Antonyms of torpor:

oral skills, animation, vigor, vitality, interest, compassion, sympathy, eagerness, enterprise, enthusiasm

Sentence/Example of torpor:

The grass snake is less active during the winter, and this condition is often referred to as torpor.