wakeful

Adjective
  1. Carefully observant or attentive;
    On the lookout for possible danger (synset 300092618)
    "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"
  2. (of sleep) easily disturbed (synset 300697019)
    "in a light doze"; "a light sleeper"; "a restless wakeful night"
  3. Marked by full consciousness or alertness (synset 300189078)
    "worked every moment of my waking hours"

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