Indubious and Questionable

Indubious

Definitions of Indubious not found.

Questionable is an antonym for indubious.

Questionable

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

Indubious is an antonym for questionable in doubtful topic.

Cite this Source
Questionable and Indubious. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/indubious/questionable
Indubious & Questionable. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/indubious/questionable>.
Questionable or Indubious. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/indubious/questionable.
Google Ngram Viewer shows how "indubious" and "questionable" have occurred on timeline