Certain and Unfirm

Opposite meaning words

Certain adjective - Known but not named.

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Unfirm is an antonym for certain.

Nearby Words: certainty, certainly

Unfirm adjective - Not firmly or solidly positioned.

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Certain is an antonym for unfirm in trembling topic.

Cite this Source

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

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

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

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