Plain and Undetermined

Opposite meaning words

Plain adjective - Free from all additions or embellishment.

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Undetermined is an antonym for plain.

Nearby Words: plainly, plainness, plaint

Undetermined adjective - Not seen or understood clearly.

Usage example: an undetermined form seen only from a distance

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Plain is an antonym for undetermined.

Nearby Word: undeterminable

Cite this Source

Undetermined and Plain. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/plain/undetermined

Plain & Undetermined. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/plain/undetermined>.

Undetermined or Plain. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/plain/undetermined.

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