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flinty (adj.)
1530s, "hard-hearted;" 1540s, "hard, impenetrable as flint," from flint + -y (2). Literal sense of "resembling flint" is from 1640s. Related: Flintily; flintiness.
1530s, "hard-hearted;" 1540s, "hard, impenetrable as flint," from flint + -y (2). Literal sense of "resembling flint" is from 1640s. Related: Flintily; flintiness.
