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
During Vargas Llosa’s lifetime, his political beliefs underwent extreme changes, from supporting Castro’s revolutionary Communism to championing traditional European liberalism, which included an adamantine belief in unregulated markets.
—
Literary Hub, 26 Feb. 2026
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
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
Literary Hub, 26 Feb. 2026
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
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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Conservative Republicans were adamant, however, against establishing a precedent that allows Congress during the yearly appropriations process to fund some agencies within Homeland Security, but not others.—
Lisa Mascaro,
Chicago Tribune,
27 Mar. 2026
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However, even as the team trudges to a play-in spot rather than a top seed, Green was adamant that the Warriors’ standard of competitiveness cannot change.—
Joseph Dycus,
Mercury News,
26 Mar. 2026
Adjective
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Across the Rockies and beyond, many of our favorite mountains were haunted by unseasonably warm spikes and stubborn weather patterns that shut out snow for weeks on end.—
Kristen Geil,
Outside,
31 Mar. 2026
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For stubborn blockages, a plumber’s snake can help break things loose.—
Lauren Jarvis-Gibson,
Fort Worth Star-Telegram,
31 Mar. 2026
Adjective
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Their steadfast belief in this very personal film and commitment to getting it on marquees means so much to me.—
Anthony D'Alessandro,
Deadline,
30 Mar. 2026
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Fielder has been the sole democratic socialist on the board and a steadfast advocate for progressive causes, often voting against Lurie’s legislative agenda and the board’s moderate majority bloc.—
Alyce McFadden,
San Francisco Chronicle,
29 Mar. 2026
Adjective
-
The hardened look of a world-weary MI6 agent.—
Ben Travers,
IndieWire,
25 Mar. 2026
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So essentially, a beverage cooler is just a polystyrene foam container with a hardened plastic coating.—
BestReviews,
Chicago Tribune,
23 Mar. 2026
Cite this Entry
“Adamantine.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/adamantine. Accessed 1 Apr. 2026.
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