intentive

attentive discerning discriminating intelligent mindful perceptive vigilant

advertent alive bright clear-sighted comprehending considering contemplating correct deducing detecting discovering eager eagle-eyed heedful interested keen not missing a trick obedient observative on one's toes on the ball penetrating questioning quick regardful searching sensitive sharp sharp-eyed surveying understanding wide-awake

careless heedless inattentive neglectful negligent unaware undiscriminating

indifferent thoughtless unmindful unobservant unwatchful

advertent arrect aware careful considerate deferential duteous dutiful heedful mindful observative observing respectful thoughtful watchful

disregarding ignorant inattentive unobservant