Certain and Incertain

Opposite meaning words

Certain adjective - Having or feeling no doubt or uncertainty; confident and assured.

Usage example: felt certain of success

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Incertain is an antonym for certain.

Nearby Words: certainty, certainly

Incertain adjective - Lacking or indicating lack of confidence or assurance.

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Certain is an antonym for incertain.

Cite this Source

Incertain and Certain. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/certain/incertain

Certain & Incertain. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/certain/incertain>.

Incertain or Certain. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/certain/incertain.

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