- apprehensive, discerning - quick to understand; "a kind and apprehensive friend"- Nathaniel Hawthorne
Antonyms: unperceptive, unperceiving (indirect, via perceptive)
- anxious, apprehensive - mentally upset over possible misfortune or danger etc; worried; "anxious parents"; "anxious about her job"; "not used to a city and anxious about small things"; "felt apprehensive about the consequences"
Antonyms: easy, at ease (indirect, via uneasy)
- apprehensive - in fear or dread of possible evil or harm; "apprehensive for one's life"; "apprehensive of danger"
Antonyms: unafraid, fearless (indirect, via afraid)