wakeful
(adjective)
adjective
1. carefully observant or attentive; on the lookout for possible danger
Similar word(s): alert, watchful, vigilant
2. (of sleep) easily disturbed
- a restless wakeful night
Similar word(s): shallow, light
3. marked by full consciousness or alertness
- worked every moment of my waking hours
Similar word(s): awake, waking