Ascertained and Undetermined
Opposite meaning words
Ascertained
Ascertained adjective - Discovered or determined by scientific observation.
Undetermined is an antonym for ascertained.
Nearby Words: ascertainment, ascertaining
Undetermined
Undetermined adjective - Not yet having been ascertained or determined.
Usage example: of undetermined species
Ascertained is an antonym for undetermined.
Nearby Word: undeterminable
Cite this Source
Undetermined and Ascertained. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/ascertained/undetermined
Ascertained & Undetermined. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/ascertained/undetermined>.
Undetermined or Ascertained. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/ascertained/undetermined.
Google Ngram Viewer shows how "ascertained" and "undetermined" have occurred on timeline