Antonyms of adj placable

1 sense of placable

Sense 1
placable (vs. implacable) -- (easily calmed or pacified)

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")

Similarity of adj placable

1 sense of placable

Sense 1
placable (vs. implacable) -- (easily calmed or pacified)
       => appeasable, conciliable -- (capable of being pacified)
       => mitigable -- (capable of being alleviated)