adjective
1.
Synonyms: sharp 4, acute, keen, penetrating, penetrative, quick-sighted, sharp-sighted, sharp-witted
2.
Synonyms: intelligent 2, alert, brainy, bright, brilliant, clever, knowing, ready-witted, sharp, smart
Related Word: apt, prompt, quick, ready
3.
Synonyms: wise 4, canny, hep, knowing, nimble-witted, quick, sharp, sharp-witted, slick, smart
Related Word: acute, keen; facetious, humorous, witty
Antonyms: slow-witted