What is the opposite of not sure?

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Contexts Adjective Having absolute certainty about something Adverb With no qualification, restriction, or limitation Adjective ▲ Having absolute certainty about something confident optimistic hopeful sanguine sure certain positive convinced doubtless unfaltering firm unwavering categorical resolute satisfied unequivocal clear consummate unhesitating assured implicit unquestioning persuaded trusting have no doubt unshakeable in one's belief easy in one's mind hold the unwavering view in no doubt not question secure in one's belief “I am confident in my team's ability to beat anyone in this competition given our superiority.” Adverb ▲ With no qualification, restriction, or limitation absolutely completely entirely fully perfectly positively surely totally categorically comprehensively decisively thoroughly unquestionably utterly wholly outright conclusively downright unconditionally unequivocally unreservedly altogether extensively purely soundly truly consummately effectively exhaustively manifestly roundly unqualifiedly clean dead exactly heartily infallibly precisely solidly sweepingly unambiguously undividedly unmitigatedly flat-out all over in full through and through a hundred per cent all out all the way in all respects in every respect in every way to the core to the end to the limit to the max to the maximum extent to the nth degree en masse every inch from beginning to end inside out lock, stock and barrel on all counts straight out to the hilt without exception without reservation come hell or high water down to the ground from top to bottom no ifs ands or buts no strings attached to the fullest extent without omission one-hundred percent from A to Z Find more words! 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Win Amazon gift cards by writing simple stories at Fictish, a new story writing game backed by WordHippo. See Also What is another word for not sure? Sentences with the word not sure Translations for not sure Use our Antonym Finder Nearby Words not surprise not surprised not surprisingly not swallow not swallowed not swallowing not supporting not supported not support not suitable not suffice not succeeding