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adamantine (adj.)
"made of adamant; having the qualities of adamant" (hard, unyielding, unbreakable, inflexible), c. 1200, 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.)).
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Definitions of adamantine
Dictionary entries near adamantine
adage
adagio
Adam
Adam's apple
adamant
adamantine
Adamite
adapt
adaptability
adaptable
adaptation