wakefulness
noun [ U ] formal uk/ˈweɪk.fəl.nəs/ us/ˈweɪk.fəl.nəs/
清醒
the state of being wakeful (= not asleep or able to sleep)
She began to drift between sleep and wakefulness. 她开始在睡眠和清醒之间漂移。
Symptoms of jetlag include sleepiness during the day, wakefulness at night, and general fatigue. 时差综合症的症状包括白天嗜睡，晚上醒着，以及总觉得疲劳。
See: wakeful
- More examples
- Her son's terrified voice acted like a stimulant, shocking her into full wakefulness.
- For millions of people, good sleep and productive wakefulness are already elusive.
- The daytime napper may be unable to easily snap back into useful wakefulness.