DictionaryimplacableImpossible to appease or stop
adjective

implacable

im-PLAK-uh-bul/ɪmˈplækəbl/

Unable to be calmed, softened, or stopped.

He remains an implacable enemy, unmoved by every offer of peace.

An implacably hostile man remains visibly unmoved through an apology, concrete restitution, and a final gesture of reconciliation.
Etymology

The negative prefix reverses placabilis, “easily appeased.” Implacable therefore describes hostility or determination that efforts at soothing or conciliation cannot soften.

In context

Storytime Haven539:53
of bodily sensation, as if she had been in very truth one of those disembodied spirits of Mrs. Johns' spirit world, driven through the solitude of the ages by the implacable decree of some incalculable malignant force called immortality.
🌑 The Moon Rock 🌒 | A Haunting Tale of Mystery and Ambition by Arthur J. Rees

More examples

  • No apology can soften her implacable anger.
  • The tenants face an implacable landlord who refuses to negotiate.
  • She pursues the truth with implacable determination.

Forms

implacable

implacably adverb — Without being calmed, softened, or stopped.

implacability noun — The quality of being impossible to appease.

Similar words

relentless
Emphasizes continuing without easing rather than resisting attempts at appeasement.
inexorable
Emphasizes being impossible to prevent or change, rather than soothe.