bouldery, inflexible, obstinate, obdurate, unyielding, bouldered, cussed, granitic, heartless, stony, unrepentant, rocklike, hardhearted, flint, granitelike, rocky.
When she had departed Mrs. Jack put her down as 'a flinty-
hearted ould maid.
I was flinty
as usual, and would give him none.
They went on towards the thresher, walking delicately among the flinty
stubble, until they reached the edge of the whirling dust.