as in unquestionable
not capable of being challenged or proved wrong
the contention that there are certain unchallengeable rules governing proper grammar
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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
Unlike Biden, Trump’s intraparty position is nearly unchallengeable.
—The Editors, National Review, 3 July 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
Alternatively, maybe journalists and, later, historians, felt that to focus on the unsolved mystery of the break-in would somehow diminish the unchallengeable fact of Nixon’s guilt in the cover-up and various other scandals unearthed in the Watergate investigations and after.
—Timothy Noah, The New Republic, 17 June 2022
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
Unlike Biden, Trump’s intraparty position is nearly unchallengeable.
—The Editors, National Review, 3 July 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
Alternatively, maybe journalists and, later, historians, felt that to focus on the unsolved mystery of the break-in would somehow diminish the unchallengeable fact of Nixon’s guilt in the cover-up and various other scandals unearthed in the Watergate investigations and after.
—Timothy Noah, The New Republic, 17 June 2022
Recent Examples of Synonyms for unchallengeable
Adjective
-
That must be the unquestionable goal for next season.—
Nnamdi Onyeagwara,
New York Times,
27 May 2026
-
Nonetheless, its power is unquestionable.—
Maximilíano Durón,
ARTnews.com,
22 May 2026
Adjective
-
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
-
For the Delfonts, who use a tape-recorder to capture this desperate plea, Leonora’s words serve as irrefutable proof that an academic career has failed to compensate for the absence of a husband and child.—
Literary Hub,
Literary Hub,
9 June 2026
Adjective
-
The second was indisputable brilliance.—
Michael Cox,
New York Times,
3 June 2026
-
The most telling detail about the vintage Heuer Monaco leading Sotheby’s Important Watches Auction in New York on June 15 speaks to the watch’s indisputable authenticity.—
Victoria Gomelsky,
Robb Report,
1 June 2026
Adjective
-
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
-
Many experts also remained in denial until evidence of Covid’s lethality and transmissibility became incontestable.—
David Blumenthal,
STAT,
24 Mar. 2026
Adjective
-
Lemongrass May Have Blood Pressure-Lowering Effects Though far from conclusive, there is scant evidence that lemongrass may exert beneficial effects on your blood pressure.—
MD Published,
Verywell Health,
6 June 2026
-
Data from Zillow was less conclusive, finding that only five out of the 10 cities saw a median rent increase by more than Los Angeles' 29%.—
Lindsay Kornick,
FOXNews.com,
2 June 2026
Adjective
-
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
-
What is incontrovertible, however, is how indispensable Guimaraes is for Howe and Newcastle.—
Chris Waugh,
New York Times,
8 May 2026
Adjective
-
These unanswerable questions tap into some of our most fundamental fears.—
Brianna Zigler,
Entertainment Weekly,
1 June 2026
-
The only truly unanswerable question about the play that ended Game 4 was exactly what the officials saw on the ice to call it a goal.—
Chris Johnston,
New York Times,
27 Apr. 2026
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
Cite this Entry
“Unchallengeable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unchallengeable. Accessed 15 Jun. 2026.
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