implacable

Impossible to placate or appease.

Not placable; not to be appeased; not to be pacified or reconciled; inexorable: as, an implacable prince; implacable malice.

Not to be relieved or assuaged.

Synonyms Relentless, etc. (see inexorable), unappeasable, unforgiving, vindictive, pitiless, rancorous.

Not placable; not to be appeased; incapable of being pacified; inexorable.

Incapable of being relieved or assuaged; inextinguishable.

Not able to be placated or appeased.

Adamant; immovable.

incapable of being placated