- flinty
- adj1. adamantine, impenetrable, unyielding, hard as flint, firm, durable; stony, rocky, granitic; callous, horny.2. indurate, hardened, inured; unfeeling, unimpressi-ble, stony-hearted, cold-hearted; cruel, unmerciful, merciless, pitiless, hard-hearted; stubborn, obstinate, obdurate, inflexible, firm, rigid, stiff, unbending; inexorable, unyielding, unalterable
A Note on the Style of the synonym finder. 2014.