Irrefragable and Speculative

Opposite meaning words

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

Usage example: the prosecutor painstakingly built an irrefragable case

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Speculative is an antonym for irrefragable.

Speculative adjective - Existing only as an assumption or speculation.

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Irrefragable is an antonym for speculative.

Cite this Source

Speculative and Irrefragable. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/irrefragable/speculative

Irrefragable & Speculative. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/irrefragable/speculative>.

Speculative or Irrefragable. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/irrefragable/speculative.

Google Ngram Viewer shows how "irrefragable" and "speculative" have occurred on timeline