Antonyms of adj irrevocable

1 sense of irrevocable

Sense 1
irrevocable (vs. revocable), irrevokable -- (incapable of being retracted or revoked; "firm and irrevocable is my doom"- Shakespeare)

revocable (vs. irrevocable), revokable -- (capable of being revoked or annulled; "a revocable order")
        => rescindable, voidable -- (capable of being rescinded or voided; "the judgment was rescindable"; "voidable contracts")
        => reversible -- (capable of being reversed; "a reversible decision is one that can be appealed or vacated")

Similarity of adj irrevocable

1 sense of irrevocable

Sense 1
irrevocable (vs. revocable), irrevokable -- (incapable of being retracted or revoked; "firm and irrevocable is my doom"- Shakespeare)
       => sealed -- (determined irrevocably; "his fate is sealed")