as in adamant
sticking to an opinion, purpose, or course of action in spite of reason, arguments, or persuasion
the adamantine opposition of his parents to his marriage to a girl from a poor family
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Recent Examples of adamantine
Still, Naz, whose solitary ways confuse his family, very much wishes that Aziza wasn’t meeting his adamantine mother, Claudine (LaTanya Richardson Jackson), or his famous father, or his ex-state-senator older brother, Junior (Glenn Davis), recently incarcerated for embezzling campaign funds.
—
Helen Shaw, The New Yorker, 20 Mar. 2025
Image My first collision with the adamantine wall of Vivamayr house rules coincided with my arrival.
—Caity Weaver, New York Times, 25 Jan. 2025
Although Bush and Obama both flirted with what was once called entitlement reform, Trump and Biden now present themselves as adamantine defenders of Social Security and Medicare, each accusing the other of secretly aiming to cut those programs.
—Matthew Karp, Harper's Magazine, 2 Oct. 2024
This poor little deer had to be sacrificed by your adamantine reviewer to show you how the new tool works.
—PCMAG, 30 May 2024
At the Guggenheim Bilbao, at Glenstone, at SF MoMA and in St. Louis — in so many places around the world — Serra’s adamantine sculptures act on you.
—Sebastian Smee, Washington Post, 27 Mar. 2024
So contrary to what Gordon suggests, effective teaching, as Weber saw it, involves much more than pitting students’ opinions against adamantine facts.
—Peter E. Gordon, The New York Review of Books, 19 Nov. 2020
This view is much in vogue today, casting China not as a country that responds to pressure and incentives but as an adamantine force incapable of reacting to external stimuli.
—Julian Gewirtz, Foreign Affairs, 13 Oct. 2020
Helen Shaw, The New Yorker, 20 Mar. 2025
Image My first collision with the adamantine wall of Vivamayr house rules coincided with my arrival.
—Caity Weaver, New York Times, 25 Jan. 2025
Although Bush and Obama both flirted with what was once called entitlement reform, Trump and Biden now present themselves as adamantine defenders of Social Security and Medicare, each accusing the other of secretly aiming to cut those programs.
—Matthew Karp, Harper's Magazine, 2 Oct. 2024
This poor little deer had to be sacrificed by your adamantine reviewer to show you how the new tool works.
—PCMAG, 30 May 2024
At the Guggenheim Bilbao, at Glenstone, at SF MoMA and in St. Louis — in so many places around the world — Serra’s adamantine sculptures act on you.
—Sebastian Smee, Washington Post, 27 Mar. 2024
So contrary to what Gordon suggests, effective teaching, as Weber saw it, involves much more than pitting students’ opinions against adamantine facts.
—Peter E. Gordon, The New York Review of Books, 19 Nov. 2020
This view is much in vogue today, casting China not as a country that responds to pressure and incentives but as an adamantine force incapable of reacting to external stimuli.
—Julian Gewirtz, Foreign Affairs, 13 Oct. 2020
Recent Examples of Synonyms for adamantine
Adjective
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Back in January 2024, when Sportico was first to report on Florida State’s conversations with Sixth Street and Arctos Partners, many around the process were adamant to point out that those conversations were private credit (or private capital), not private equity.—
Eben Novy-Williams,
Sportico.com,
22 Oct. 2025
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Giuffre was adamant that the pain, including several attempts at suicide in the past few years, was part of her story.—
Laura Trujillo,
USA Today,
22 Oct. 2025
Adjective
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Month over month, that would be the same stubborn pace that has persisted for more than two years.—
Steve Kopack,
NBC news,
24 Oct. 2025
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Results show that microbial iron mining can immobilize toxic metals and convert stubborn pollutants into less harmful compounds.—
Aamir Khollam,
Interesting Engineering,
24 Oct. 2025
Adjective
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Davis, a staunch libertarian, is one of the company’s steadfast defenders.—
David Peisner,
Rolling Stone,
23 Oct. 2025
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Odinga, who served prison time for his steadfast support for democracy and political reform, played a critical role in replacing a colonial-era charter with the country’s current constitution, which imposes clearer limits on presidential power.—
Ian Bremmer,
Time,
22 Oct. 2025
Adjective
-
The extruder gears and rods are made from hardened steel, which resists wear.—
PC Magazine,
PC Magazine,
24 Oct. 2025
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Even a hardened home has weaknesses—in this case, a flammable window frame and unclosed eaves—that can lead to failure.—
Ingfei Chen,
New Yorker,
22 Oct. 2025
Cite this Entry
“Adamantine.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/adamantine. Accessed 28 Oct. 2025.
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