unforgiving (
http://definr.com/unforgiving)
adj 1: unwilling or unable to forgive or show mercy; "a surly
unforgiving old woman" [ant:
forgiving]
2: not to be placated or appeased or moved by entreaty;"grim
determination"; "grim necessity"; "Russia's final hour, it
seemed, approached with inexorable certainty"; "relentless
persecution"; "the stern demands of parenthood [syn:
grim,
inexorable,
relentless,
stern,
unappeasable,
unrelenting]
3: harsh and severe; "I hope I'm not being uncharitable but he
really is a bore"; "unjust and uncharitable criticism"
[syn:
uncharitable]