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
-
For several decades, bonds have been the unquestionable anchor for portfolios — liquid, stable, and reliable.—
Trefis Team,
Forbes.com,
20 Jan. 2026
-
What is unquestionable is that like millions of other anguished parents, Rob and Michele struggled with how to help their troubled son.—
Cara Lynn Shultz,
PEOPLE,
20 Dec. 2025
Adjective
-
These are but a few examples of conventional wisdom that for centuries were widely accepted as irrefutable truth.—
Larry D. Urish,
Oc Register,
30 Jan. 2026
-
The whiteprint is irrefutable evidence of the Nazis’ murderous intent.—
Elliott Broidy,
Sun Sentinel,
27 Jan. 2026
Adjective
-
So many warrants were indisputable proof that the shooter had been right to fear for his life.—
Literary Hub,
Literary Hub,
28 Jan. 2026
-
Jalen Hurts’ credentials are indisputable.—
Zach Berman,
New York Times,
27 Jan. 2026
Adjective
-
Duesberg kept making his argument well after evidence that the human immunodeficiency virus, HIV, causes AIDS became incontestable.—
Business Columnist,
Los Angeles Times,
29 Jan. 2026
-
That is to say, there is no one pure ur-movie, unblemished and incontestable.—
Anthony Lane,
New Yorker,
22 Sep. 2025
Adjective
-
Atila found residues in seven different vessels but only obtained a conclusive result from one artifact excavated in the ancient city of Pergamon that dates from the second century.—
Jack Guy,
CNN Money,
10 Feb. 2026
-
But the research isn’t conclusive.—
Adithi Ramakrishnan,
Los Angeles Times,
10 Feb. 2026
Adjective
-
The feeling of well-being is tangible, and incontrovertible.—
Condé Nast Traveler,
Condé Nast Traveler,
22 Jan. 2026
-
Beauty’s at-times reluctance to embrace TikTok Shop as a channel mirrors the industry’s longtime disinclination toward Amazon, an attitude that has shifted in recent years as the e-commerce giant’s beauty business has grown at an incontrovertible clip.—
Noor Lobad,
Footwear News,
11 Nov. 2025
Adjective
-
Though his World Series moment didn’t occur with the Red Sox, the experience could lend insight into his new organization, which spent 86 years racking up similarly stunning last-second heartbreaks and unanswerable what-ifs.—
Gabrielle Starr,
Boston Herald,
11 Feb. 2026
-
Yet certain fundamental questions about the Fourier transform have remained stubbornly, and mysteriously, unanswerable.—
Leila Sloman,
Quanta Magazine,
28 Jan. 2026
Adjective
-
In 2025, Rebecca Yarros is that genre’s indubitable champion.—
Rebecca Yarros,
Vulture,
1 Dec. 2025
-
But while the trajectory is indubitable, the ascent is far from smooth, as Ghana’s recent experiences neatly encapsulate.—
Charlie Campbell,
Time,
30 Oct. 2025
Cite this Entry
“Unchallengeable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unchallengeable. Accessed 21 Feb. 2026.
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