indubitable

adjective

: too evident to be doubted : unquestionable

Did you know?

There's no reason to question the fairly straightforward etymology of indubitable—a word that has remained true to its Latin roots. It arrived in Middle English in the 15th century from Latin indubitabilis, itself a combination of "in-" ("not") and "dubitabilis" ("open to doubt or question"). "Dubitabilis" is from the verb dubitare, meaning "to doubt," which also gave us our "doubt." The word dubitable also exists in English, and of course means "questionable or doubtable," but it is fairly rare.

Examples of indubitable in a Sentence

the indubitable fact that there are no more woolly mammoths or saber-toothed tigers around
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The DeSantis announcement is an indubitable win for Musk. Scott Nover, Quartz, 24 May 2023 There is all of a sudden one Way of Knowing which presents us with indubitable truths. Razib Khan, Discover Magazine, 13 Dec. 2010

Word History

Etymology

Middle English indubitabyll, from Latin indubitabilis, from in- + dubitabilis dubitable

First Known Use

15th century, in the meaning defined above

Time Traveler
The first known use of indubitable was in the 15th century

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Cite this Entry

“Indubitable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/indubitable. Accessed 22 Mar. 2025.

Kids Definition

indubitable

adjective
: impossible to doubt : beyond question

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