We've found 4 phrases for reversible (0.162 seconds):

brain-dead »    Having an irreversible loss of brain function and cessation of brain activity.

cross the Rubicon »    To make an irreversible decision or to take an action with consequences.

the die is cast »    The future is determined; there are no more options; events will proceed in an irreversible manner.

unring a bell »    To reverse the irreversible.

BTW, Why won't you become an editor?