Etymology
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adamantine (adj.)

c. 1200, "made of adamant; having the qualities of adamant" (hard, unyielding, unbreakable, inflexible), from Latin adamantinus "hard as steel, inflexible," from Greek adamantinos "hard as adamant," from adamas (genitive adamantos) "unbreakable, inflexible," as a noun, "hardest material" (see adamant (n.)).

updated on September 14, 2022

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