UNPROVABLE Synonyms: 26 Similar and Opposite Words

unprovable

adjective

Definition of unprovable

as in unverifiable

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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.

Recent Examples of unprovable His first incompleteness theorem states that there are necessarily unprovable statements in all sufficiently strong, contradiction-free systems. — Manon Bischoff, Scientific American, 26 May 2026 His first incompleteness theorem states that in every formal system of mathematics that is rich enough to express arithmetic, there will be propositions that are both true and unprovable. — Quanta Magazine, 18 May 2026 Given that many of Epstein’s correspondents are redacted and that threads start and stop randomly, many of the emails are perfect building blocks for constructing plausible but ultimately unprovable narratives. — Charlie Warzel, The Atlantic, 14 Nov. 2025 Oswego County locals say the sheriff’s patrol is stopping Latino drivers for minor or unprovable violations, then handing them over to Border Patrol. — Mina Aguilar, New York Daily News, 29 July 2025 See All Example Sentences for unprovable

Recent Examples of Synonyms for unprovable

Adjective

Such a mind might fail an unverifiable consciousness test at the same time that its persistent interests start to boldly assert themselves.

— Andréa Morris, Forbes.com, 10 Aug. 2026
The most reliable move when labels feel unverifiable is to buy directly from a farmer or producer who can describe their practices.

— Anne Wolf, Martha Stewart, 26 July 2026

Definition of unverifiable

Adjective

Currah’s opinion piece is wrong on the facts, the law, and the science, and reaches unsupportable conclusions.

— Paisley Currah, The New York Review of Books, 18 Dec. 2025
The venerable but troubled outlet has been for sale since its previous owners ran up unsupportable debts and were removed in 2023.

— Tom Chivers, semafor.com, 24 Nov. 2025

Definition of unsupportable

Adjective

Analysts who spoke to ABC News acknowledged the difficulty in predicting when the most severe effects of the ballooning debt may materialize but warned that regardless of the answer, the current trajectory is unsustainable.

— Max Zahn, ABC News, 20 Aug. 2026
Debt hawks have been warning policymakers for some time that the nation’s fiscal path is unsustainable, and the issue is increasingly rising up voters’ agendas in the run-up to midterms later this year.

— Eleanor Pringle, Fortune, 20 Aug. 2026

Definition of unsustainable

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unprotected

unprovable

unproved

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“Unprovable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unprovable. Accessed 27 Aug. 2026.

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Synonyms of unprovable

adjective

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