The adjective ingenious means extremely clever--marked by inventive skill and imagination. Ingenuous means straightforward, candid, without guile.
Examples:
- "To read of a detective's daring finesse or ingenious stratagem is a rare joy." (Rex Stout)
- She was enchanted by his ingenuous expression and frank blue eyes.
Practice:
(a) Her plan was _____, but she lacked the courage to carry it out.
(b) She flashed a wide, _____ smile.
