Dubious and Irrefragable

Dubious

Dubious adjective - Giving good reason for being doubted, questioned, or challenged.

Irrefragable is an antonym for dubious.

Nearby Words: dubiety, dubiousness, dubiously

Irrefragable

Irrefragable adjective - Not capable of being challenged or proved wrong.
Usage example: the prosecutor painstakingly built an irrefragable case

Dubious is an antonym for irrefragable in topics: definite, beyond question.
Cite this Source
Irrefragable and Dubious. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/dubious/irrefragable
Dubious & Irrefragable. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/dubious/irrefragable>.
Irrefragable or Dubious. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/dubious/irrefragable.
Google Ngram Viewer shows how "dubious" and "irrefragable" have occurred on timeline