wakeful

Adjective

WordNet 3.0

carefully observant or attentive; on the lookout for possible danger“a policy of open-eyed awareness”“the vigilant eye of the town watch”“there was a watchful dignity in the room”“a watchful parent with a toddler in tow”Synonyms: argus-eyed open-eyed vigilant
(of sleep) easily disturbed“in a light doze”“a light sleeper”“a restless wakeful night”Synonyms: light
marked by full consciousness or alertness“worked every moment of my waking hours”Synonyms: waking

Wakeful \Wake"ful\, a. Not sleeping; indisposed to sleep; watchful; vigilant. [1913 Webster]

Dissembling sleep, but wakeful with the fright. --Dryden. [1913 Webster] -- Wake"ful*ly, adv. -- Wake"ful*ness, n. [1913 Webster]