Synonyms: inexorable, intransigent, adamant, adamantine
Definition: impervious to pleas, persuasion, requests, reason
Usage: 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 tendency
Synonyms: inexorable, grim, unrelenting, relentless, unappeasable, unforgiving, stern
Definition: not to be placated or appeased or moved by entreaty
Usage: grim determination; grim necessity; Russia's final hour, it seemed, approached with inexorable certainty; relentless persecution; the stern demands of parenthood