adamantine
Americanadjective
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utterly unyielding or firm in attitude or opinion.
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too hard to cut, break, or pierce.
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like a diamond in luster.
adjective
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very hard; unbreakable or unyielding
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having the lustre of a diamond
Etymology
Origin of adamantine
First recorded in 1200–1250; Middle English, from Latin adamantinus, from Greek adamántinos adamant, -ine 1
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
To love a Scorpio, then, is to fiercely protect their softness with the same shadowy ardor that they use to construct their inner adamantine fortresses.
From Los Angeles Times
Akira is not so much an obstacle, then, as he is a diamond in the rough, a permanent part of Takiko and her adamantine resolve to live on her own terms.
From Los Angeles Times
He’s since backed off a bit from his adamantine opposition, but the core of his position was concern that the measure would add to inflation.
From Los Angeles Times
George’s response to these tumults was, in Roberts’s phrase, “adamantine inflexibility.”
From Washington Post
Koirala, a Bollywood star, brings a taut poise to a mother whose veneer seems adamantine until the Duttas walk in the door.
From New York Times
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
