irrevocable

/ɪˈrɛvəkəbəl/
adjective
  1. Not able to be changed, reversed, or recovered; final.
    • Signing the document was an irrevocable commitment to sell the house.
    • The court's ruling is irrevocable and cannot be appealed.
    • Once you press that button, the launch sequence is irrevocable.
Antonyms