obdurate:
- unmoved by pity or persuasion; unyielding; hard-hearted; stubborn
- persistently impenitent; hardened in wickedness
Example: Rather, they mean to demonstrate that the obdurate is assailable; that it is, in fact, possible to "turn oppression into opportunity"; and that the experience of a young woman like Rath is replicable: she escaped sexual slavery, which is an accomplishment in itself, and has gone on to become a successful entrepreneur, selling hats and bags and phone calls out of a cart she was able to buy and stock with a $400 loan from an aid group, and now is married, has a son, and supports her extended family. [Reference: The New York Review of Books, "Breaking a Conspiracy of Silence"]
