Unconceivable and Unquestionable

Opposite meaning words

Unconceivable adjective - Too extraordinary or improbable to believe.

Usage example: it's unconceivable that a once-promising actor could end up this way

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Unquestionable is an antonym for unconceivable.

Unquestionable adjective - Not capable of being challenged or proved wrong.

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Unconceivable is an antonym for unquestionable.

Cite this Source

Unquestionable and Unconceivable. (2016). Retrieved 2026, July 31, from https://thesaurus.plus/related/unconceivable/unquestionable

Unconceivable & Unquestionable. N.p., 2016. Web. 31 Jul. 2026. <https://thesaurus.plus/related/unconceivable/unquestionable>.

Unquestionable or Unconceivable. 2016. Accessed July 31, 2026. https://thesaurus.plus/related/unconceivable/unquestionable.

Google Ngram Viewer shows how "unconceivable" and "unquestionable" have occurred on timeline