Adjective: unforgiving ,ún-for'gi-ving [N. Amer], ,ún-fu'gi-ving [Brit]
- Unwilling or unable to forgive or show mercy
"a surly unforgiving old woman"
- Not to be placated, appeased or moved by entreaty
"unforgiving determination";
- grim, inexorable, relentless, stern, unappeasable, unrelenting
See also: implacable, revengeful, vengeful, vindictive
Antonym: forgiving