Sure and Unconceivable

Opposite meaning words

Sure adjective - Having or showing a mind free from doubt.

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Unconceivable is an antonym for sure.

Nearby Word: surely

Unconceivable adjective - Too extraordinary or improbable to believe.

Usage example: it's unconceivable that a once-promising actor could end up this way

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Sure is an antonym for unconceivable.

Cite this Source

Unconceivable and Sure. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/sure/unconceivable

Sure & Unconceivable. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/sure/unconceivable>.

Unconceivable or Sure. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/sure/unconceivable.

Google Ngram Viewer shows how "sure" and "unconceivable" have occurred on timeline