wakeful
adjective
1 wakeful
Carefully observant or attentive; on the lookout for possible danger.
synonyms: argus-eyed, open-eyed, vigilant.
Roget 459: careful regardful, heedful; taking care etc. v.; particular; prudent etc. (cautious) 864; considerate; thoughtful etc. ... show more
2 wakeful
of sleep Easily disturbed:
— A restless wakeful night.
synonym: light.
3 wakeful
Marked by full consciousness or alertness.
synonym: waking.
Moby thesaurus: agile, alert, alive, attentive, awake, bright, insomniac, insomnious, keen, nimble, on the, on the alert, on the ball, on the job, prompt, qui vive, quick, ready, restless, sharp ... show more.
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