observant (adjective) observant: alert, watchful
Sinonime: arise,
arouse, awake, awaken, be roused, bestir, bring to life, call*, come to, get out of bed, get up, nudge, open one's eyes, prod, rise, rise and shine, roll out, rouse, shake, stir*, stretch, tumble out, turn out, wake up
Antonime: careless,
inattentive,
indifferent,
thoughtless,
unaware, unmindful, unobservant, unwatchful