Certain and Undetermined

Opposite meaning words

Certain adjective - Established beyond doubt or question; definitely known.

Usage example: his fate is certain

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Undetermined is an antonym for certain.

Nearby Words: certainty, certainly

Undetermined adjective - Not seen or understood clearly.

Usage example: an undetermined form seen only from a distance

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Certain is an antonym for undetermined in not determined topic.

Nearby Word: undeterminable

Cite this Source

Undetermined and Certain. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/certain/undetermined

Certain & Undetermined. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/certain/undetermined>.

Undetermined or Certain. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/certain/undetermined.

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