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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Advertisement Throughout negotiations, Tehran has been adamant that any cease-fire with Washington must also end the hostilities between Israeli forces and Hezbollah, and that any permanent truce must lead to Israel withdrawing its forces from southern Lebanon.—
Callum Sutherland,
Time,
19 June 2026
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Trump and Vance have been adamant that the fund will not be financed by American dollars.—
Kevin Liptak,
CNN Money,
17 June 2026
Adjective
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But La Roja could not find a way past Vozinha and a stubborn defense that had an answer to everything Spain’s superstars threw at them.—
ABC News,
ABC News,
16 June 2026
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Meanwhile, Hanks invests the vulnerable but stubborn Woody with a delectable senior resilience.—
Owen Gleiberman,
Variety,
16 June 2026
Adjective
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Sacramento Councilmember Karina Talamantes, whose district is directly adjacent to the project, has remained steadfast in her opposition to the development, urging the county to further delay the vote until a new supervisor is elected to replace Phil Serna, who is championing the project.—
Jennah Pendleton,
Sacbee.com,
16 June 2026
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While fashion cycles continue to accelerate—microtrends anchoring and evaporating in the span of a season—the twins have remained steadfast in their aesthetic convictions, causing the masses to forage and collect the few visuals of them doing just so.—
Cortne Bonilla,
Vogue,
12 June 2026
Adjective
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The companies say the Ruta Block 3 is designed for strategic deep-strike missions against high-value and hardened targets.—
Neetika Walter,
Interesting Engineering,
19 June 2026
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However, this breadth becomes a liability in hardened enterprise workflows that aren’t open-ended.—
Anshul Gupta,
Forbes.com,
18 June 2026
Cite this Entry
“Adamantine.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/adamantine. Accessed 23 Jun. 2026.
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