im·pla·ca·ble /(ˌ)ɪmˈplækəbəl, ˈple-/
  (a.)難寬恕的,難和解的,執拗的
  Im·pla·ca·ble a.
  1. Not placable; not to be appeased; incapable of being pacified; inexorable; as, an implacable prince.
     I see thou art implacable.   --Milton.
     An object of implacable enmity.   --Macaulay.
  2. Incapable of being relieved or assuaged; inextinguishable. [R.]
     O! how I burn with implacable fire.   --Spenser.
  Which wrought them pain
  Implacable, and many a dolorous groan.   --Milton.
  Syn: -- Unappeasable; inexorable; irreconcilable; unrelenting; relentless; unyielding.
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  implacable
       adj : impossible to placate; "an implacable enemy" [ant: placable]