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unchallengeable

adjective

ˌən-ˈcha-lən-jə-bəl How to pronounce unchallengeable (audio)
Definition of unchallengeablenext
as in unquestionable
not capable of being challenged or proved wrong the contention that there are certain unchallengeable rules governing proper grammar

Synonyms & Similar Words

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Antonyms & Near Antonyms

Example Sentences

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 unchallengeable Californians have been conditioned to consider recycling to be an unchallengeable proposition. — Kerry Jackson, Oc Register, 4 Feb. 2026 The lens of the hearing never focused on Robeson, who was seen as only a prop for Robinson’s patriotism, unworthy of rediscovery, especially as the Robinson/Rickey integration story—sports as the pathway to equality—became virtually unchallengeable. — Literary Hub, 21 Jan. 2026 Regular board and executive succession planning, with a balance of independent directors, can ensure the right questions are asked and no single person becomes unchallengeable. — James Henderson, Forbes, 4 Dec. 2024 No longer having to play cosmetic chemist is an unchallengeable win. — Essence, 23 Oct. 2023 This was rooted in a calculation that America’s greatest source of strength was global perceptions of the country as unchallengeable. — Max Fisher, New York Times, 18 Mar. 2023 In the heady days after the Cold War, the order appeared both unchallenged and unchallengeable. — Ivo Daalder, Foreign Affairs, 21 June 2022
Recent Examples of Synonyms for unchallengeable
  1. unquestionable
  2. irrefutable
  3. indisputable
  4. incontestable
  5. conclusive
  6. incontrovertible
  7. unanswerable
  8. indubitable
Adjective
  • Arca — a nonbinary trans woman who makes uncategorizable music and embodies unquestionable glamour — anchors her divahood in a mutation of body, soul and sound.
    — Los Angeles Times, Los Angeles Times, 15 Sep. 2026
  • There are unquestionable truths about the 19-year-old Hagens.
    — Fluto Shinzawa, New York Times, 11 Sep. 2026
Definition of unquestionable
Adjective
  • Reporting on the Holocaust tested Grossman’s attention to character, replacing the gray zone of Soviet morality with irrefutable villains and victims.
    — Madeleine Wulfahrt, New Yorker, 8 July 2026
  • Organizations that embed deep, scientific inquiry into their commercial DNA can not only disrupt existing markets but also engineer entirely new ones based on the irrefutable laws of physics.
    — Alexandra Vidyuk, Forbes.com, 12 June 2026
Definition of irrefutable
Adjective
  • Scientists have an indisputable playful side, evidenced by frequent allusions to popular culture in their research publications.
    — Jennifer Ouellette, ArsTechnica, 9 Sep. 2026
  • Advertisement The need to dial down the temperature is indisputable.
    — Charlie Campbell, Time, 11 Aug. 2026
Definition of indisputable
Adjective
  • Funnyman, vulgarian, auteur — Mel Brooks’s imprint on American cinema is incontestable yet scandalously undervalued.
    — Manohla Dargis, New York Times, 26 June 2026
  • The mark was federally registered in 2015 and has since achieved incontestable status, a legal designation that strengthens ownership rights.
    — Bryan West, USA Today, 30 Mar. 2026
Definition of incontestable
Adjective
  • SuperScan conducts a deeper investigation when a standard check isn’t conclusive.
    — StackCommerce Team, PC Magazine, 13 Sep. 2026
  • While not treated as conclusive, polygraph results often serve as a filter.
    — Brian O'Neill, The Conversation, 10 Sep. 2026
Definition of conclusive
Adjective
  • That is what’s decreed by the Premier League, which reviews each incident and only wants players to be sent off if there is incontrovertible evidence that the referee had no choice.
    — Graham Scott, New York Times, 25 Aug. 2026
  • By slow degrees, Philip’s story shifts to accommodate the incontrovertible evidence of IP addresses and deciphered cryptography and Lucy struggles to keep up, let alone understand.
    — Leslie Felperin, HollywoodReporter, 15 May 2026
Definition of incontrovertible
Adjective
  • And that’s a pretty different kind of unanswerable question than, for instance, how the universe began.
    — Clara Moskowitz, Scientific American, 15 Sep. 2026
  • That’s the unanswerable question that will complicate the coming months and years.
    — Henry Bushnell, New York Times, 15 Sep. 2026
Definition of unanswerable
Adjective
  • As a result, mathematical truths do not make up a unified whole of equally indubitable truths; instead, their status as knowledge varies gradually from doubtless facts to increasingly uncertain hypotheses.
    — Quanta Magazine, Quanta Magazine, 18 May 2026
  • The second route, and the route that makes indubitable sense, entails using the techniques and methods of psychology to gauge the performance of AI.
    — Lance Eliot, Forbes.com, 15 Apr. 2026
Definition of indubitable

Browse Nearby Words

unchains
unchallengeable
unchallenged
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Cite this Entry

“Unchallengeable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unchallengeable. Accessed 22 Sep. 2026.

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