Word Study
unforgiving
OXFORD DICTIONARY
unforgiving, adj. not forgiving.
Derivative
unforgivingly adv. unforgivingness n.
THESAURUS
unforgiving
bowelless, cruel, dog-eat-dog, flinty, hard, harsh, heartless, inclement, inexorable, merciless, pitiless, relentless, remorseless, ruthless, uncompassionate, uncompassioned, unfeeling, unmerciful, unpitiful, unpitying, unremorseful, unsympathetic, unsympathizing, unyielding, without mercyROGET THESAURUS
unforgiving
Revenge
N revenge, revengement, vengeance, avengement, avengeance, sweet revenge, vendetta, death feud, blood for blood retaliation, day of reckoning, rancor, vindictiveness, implacability, malevolence, ruthlessness, avenger, vindicator, Nemesis, Eumenides, revengeful, vengeful, vindictive, rancorous, pitiless, ruthless, rigorous, avenging, unforgiving, unrelenting, inexorable, stony-hearted, implacable, relentless, remorseless, aeternum servans sub pectore vulnus, rankling, immitigable, manet ciratrix, manet alid mente repostum, dies irae dies illa, in high vengeance there is noble scorn, inhumanum verbum est ultio, malevolus animus abditos dentes habet, now infidel I have thee on the hip.For further exploring for "unforgiving" in Webster Dictionary Online