drowsiness

Definitions

A state of feeling sleepy or lethargic.

The quality or condition of being inclined to fall asleep.

Examples

The medication often causes drowsiness, so you should avoid driving after taking it.

A sudden wave of drowsiness washed over him as he sat through the long, monotonous lecture.

Synonyms

sleepiness lethargy somnolence tiredness sluggishness fatigue dopiness

Antonyms

alertness wakefulness vigilance energy liveliness vivacity attentiveness