Synonyms of insightful

1 Syllable
keen, shrewd, cute, sharp, smart, quick, wise
2 Syllables
probing, brainy, sophic, alert, knowing, conscious, savvy, gnostic, sapient, sager, wiser, wisest, with-it
3 Syllables
discerning, astute, tuned-in, insighted, awake, observant, percipient, sagacious, acute, astucious, aware
4 Syllables
perceptive, knowledgeable, penetrating, understanding, sensitive, intelligent, responsive, intuitive
5 Syllables
penetrative