adjective
1.
Synonyms: acute 3, keen, sensitive, sharp
Related Word: responsive
Antonyms: imperceptive, unperceptive
2.
Synonyms: wise 1, discerning, gnostic, insighted, insightful, knowing, knowledgeable, sagacious, sage, sophic
Related Word: prehensile, prehensive, prehensorial
Antonyms: imperceptive, unperceptive