wakefulness

Everyday

1. Wakefulness is the state of being awake. tree →
2. Wakefulness also means being unable to sleep when you want to. tree →

In the lessons

In science and health lessons on sleep, the body moves between sleep and wakefulness during a day; light and screens can cause wakefulness at night. In stories, a character's wakefulness at night shows worry or excitement. Phrases: «periods of wakefulness», «wakefulness at night».

Examples

• Coffee can cause wakefulness at night. tree →
• Babies have short periods of wakefulness between sleeps. tree →
• The night before the trip, excitement kept me in a state of wakefulness. tree →
• Bright screens before bed can lead to wakefulness. tree →
• Owls are in their wakefulness at night and sleep by day. tree →
• The doctor asked Gran about her wakefulness in the early morning. tree →

Note

Uncountable. From «wakeful» (awake, not able to sleep) + «-ness». Formal word; everyday talk says «being awake» or «not being able to sleep».