Pocket Thesaurus
Antonyms of certain
self-assured, composed, sure, gutsy, pushy, certain, audacious, confident, self-confident, unflappable, collected, secure, brazen, cool, assertive, bold, cocksure, complacent, gung ho, high, imperturbable, overconfident, positive, rosy, sanguine, self-possessed, upbeat, unhesitating, poised, puffed up, pumped up
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