adjective
self-assured
Synonyms: arrogant, brash, bumptious, certain, cocksure, conceited, confident, egotistical, hotdogger, hotshot, hubristic, know-it-all, lordly, nervy, overconfident, overweening, positive, presumptuous, self-confident, smart aleck, smart guy, smarty, smarty pants, sure, swaggering, swollen-headed, vain, wise guy
Antonyms: humble, modest, shy, tentative, timid, uncertain, unsure
adjective
self-assured, full of oneself
Synonyms: arrogant, brash, bumptious, certain, conceited, confident, egotistical, hotdogging, hotshot, hubristic, know-it-all, lordly, nervy, overconfident, overweening, positive, presumptuous, self-confident, smart aleck, smart guy, smarty, smarty pants, sure, swaggering, swollen-headed, vain, wise guy
Antonyms: humble, modest, uncertain, unself-confident, unsure