Certain and Unreasoning

Opposite meaning words

Certain adjective - Known but not named.

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Unreasoning is an antonym for certain.

Nearby Words: certainty, certainly

Unreasoning adjective - Not using or following good reasoning.

Usage example: an unreasoning argument based on some false assumptions

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Certain is an antonym for unreasoning.

Cite this Source

Unreasoning and Certain. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/certain/unreasoning

Certain & Unreasoning. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/certain/unreasoning>.

Unreasoning or Certain. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/certain/unreasoning.

Google Ngram Viewer shows how "certain" and "unreasoning" have occurred on timeline