Inconceivable and Sure

Opposite meaning words

Inconceivable adjective - Too extraordinary or improbable to believe.

Usage example: the formerly inconceivable idea that humans could land on the moon

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Sure is an antonym for inconceivable.

Nearby Word: inconceivability

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

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Inconceivable is an antonym for sure.

Nearby Word: surely

Cite this Source

Sure and Inconceivable. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/inconceivable/sure

Inconceivable & Sure. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/inconceivable/sure>.

Sure or Inconceivable. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/inconceivable/sure.

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