audacious

Synonyms: adventurous aweless bold brassy brave cheeky courageous daredevil dauntless enterprising fearless foolhardy gutty intrepid nervy rash resolute risky smart ass unafraid uncurbed undaunted ungoverned valiant venturesome

Antonyms: cautious gentle humble meek mild modest reserved timid yielding

Synonyms: assuming bantam bold brash brassy brazen cheeky defiant disrespectful forward impertinent impudent insolent nervy rude saucy shameless

Antonyms: humble modest reserved shy timid