Antonyms of adj implacable

1 sense of implacable

Sense 1
implacable (vs. placable) -- (incapable of being placated; "an implacable enemy")

placable (vs. implacable) -- (easily calmed or pacified)
        => appeasable, conciliable -- (capable of being pacified)
        => mitigable -- (capable of being alleviated)

Similarity of adj implacable

1 sense of implacable

Sense 1
implacable (vs. placable) -- (incapable of being placated; "an implacable enemy")
       => 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")
       => unmitigable -- (incapable of being mitigated; "stern and unmitigable accusations")
          Also See-> merciless#1, unmerciful#1