adamantine

Adj.	1.	adamantine - consisting of or having the hardness of adamant
	2.	adamantine - having the hardness of a diamond hard - not yielding to pressure or easily penetrated; "hard as rock"
	3.	adamantine - not capable of being swayed or diverted from a course; unsusceptible to persuasion; "he is adamant in his refusal to change his mind"; "Cynthia was inexorable; she would have none of him"- W.Churchill; "an intransigent conservative opposed to every liberal tendancy" adamant, intransigent, inexorable inflexible - extended meanings; incapable of change; "a man of inflexible purpose"

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