inexorable

英 [ɪn'eks(ə)rəb(ə)l] 美[ɪn'ɛksərəbl]

1. not to be placated or appeased or moved by entreaty;: "grim determination"; "grim necessity"; "Russia's final hour, it seemed, approached with inexorable certainty"; "relentless persecution"; "the stern demands of parenthood"

2. not capable of being swayed or diverted from a course; unsusceptible to persuasion;: "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 tendancy"