unforgiving

Definitions of unforgiving
  1. adjective
    unwilling or unable to forgive or show mercy
    “a surly unforgiving old woman”
    Synonyms:
    revengeful, vengeful, vindictive
    disposed to seek revenge or intended for revenge
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    Antonyms:
    forgiving
    inclined or able to forgive and show mercy
    kind, tolerant
    tolerant and forgiving under provocation
    unvindictive
    not vindictive
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  2. adjective
    not to be placated or appeased or moved by entreaty
    synonyms: grim, inexorable, relentless, stern, unappeasable, unrelenting
    implacable
    incapable of being placated
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