- Antonyms:
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alert, watchful
engaged in or accustomed to close observation
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argus-eyed, open-eyed, vigilant, wakeful
carefully observant or attentive; on the lookout for possible danger
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fly
(British informal) not to be deceived or hoodwinked
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heads-up, wide-awake
fully alert and watchful
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lidless, sleepless
always watchful
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wary
marked by keen caution and watchful prudence
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awake
not in a state of sleep; completely conscious
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lively
full of life and energy
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