intelligent

Synonyms: able acute alert alive all there apt astute brainy bright brilliant calculating capable clever comprehending creative deep discerning enlightened exceptional highbrow imaginative ingenious instructed inventive keen knowing knowledgeable original penetrating perceptive perspicacious profound quick quickwitted rational ready reasonable resourceful responsible sage sharp smart thinking together understanding well-informed whiz wise witty

Antonyms: foolish idiotic imbecile stupid unintelligent