irrevocable

adj

1. (not-comparable)Unable to be retracted or reversed; final.

   “Firm and irrevocable is my doom Which I have pass'd upon her; she is banish'd.”

   “I have talked thus to you, child, not to insult you for what is past and irrevocable, but to caution and strengthen you for the future.”

   “On each face, wonder and fear were painted vividly; each so still and silent, looking at the other over the black gulf of the irrevocable past.”

   “Once again, Mario Cipollini has announced his definite, absolute, unswerving and irrevocable decision to retire, and this time he means it. Probably.”