ADAMANTINE Synonyms: 112 Similar and Opposite Words

adamantine

adjective

ˌa-də-ˈman-ˌtēn

Definition of adamantine

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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Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

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 Image My first collision with the adamantine wall of Vivamayr house rules coincided with my arrival. — Caity Weaver, New York Times, 25 Jan. 2025 This poor little deer had to be sacrificed by your adamantine reviewer to show you how the new tool works. — PCMAG, 30 May 2024 She is known for her aphoristic precision and intense, adamantine paragraphs. — Matthew Gavin Frank, Harper's Magazine, 21 Feb. 2022 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

Her mom handmade her dress Parton was adamant about having her mom, Avie Lee Parton, present for her nuptials.

— Nicole Briese, PEOPLE, 27 Aug. 2026
But Coppola was adamant, and Eastman used her leverage to help secure Pacino’s place.

— Tom Tapp, Deadline, 27 Aug. 2026

Definition of adamant

Adjective

But the same steadfast pursuit that’s placed the attorney at the center of nearly every call for racial justice in the past decade has earned Crump more than a few detractors.

— Ryan Young, CNN Money, 30 Aug. 2026
In spite of the steadfast testimony of those who went over the antlers as meticulously as anyone could, there are still many detractors.

— Richard P. Smith, Outdoor Life, 27 Aug. 2026

Definition of steadfast

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adamantine

adapt

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“Adamantine.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/adamantine. Accessed 1 Sep. 2026.

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Synonyms of adamantine

adjective

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