Antonyms of adj unforgiving

2 senses of unforgiving

Sense 1
unforgiving (vs. forgiving) -- (unwilling or unable to forgive or show mercy; "a surly unforgiving old woman")

forgiving (vs. unforgiving) -- (inclined or able to forgive and show mercy; "a kindly forgiving nature"; "a forgiving embrace to the naughty child")
        => kind, tolerant -- (tolerant and forgiving under provocation; "our neighbor was very kind about the window our son broke")
        => unvindictive -- (not vindictive)

Sense 2
grim, inexorable, relentless, stern, unappeasable, unforgiving, unrelenting -- (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")

INDIRECT (VIA implacable) -> placable -- (easily calmed or pacified)

Similarity of adj unforgiving

2 senses of unforgiving

Sense 1
unforgiving (vs. forgiving) -- (unwilling or unable to forgive or show mercy; "a surly unforgiving old woman")
       => revengeful, vindictive, vengeful -- (disposed to seek revenge or intended for revenge; "more vindictive than jealous love"- Shakespeare; "punishments...essentially vindictive in their nature"- M.R.Cohen)

Sense 2
grim, inexorable, relentless, stern, unappeasable, unforgiving, unrelenting -- (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")
       => implacable (vs. placable) -- (incapable of being placated; "an implacable enemy")