Irrevocable [adjective]
Definition of Irrevocable:
fixed, unchangeable
Sentence/Example of Irrevocable:
Principal or agent, my decision, Doctor, is irrevocable—I refuse to serve your accursed ends further.
It seemed to the poor child as if Mrs Mason's words were irrevocable, and, that being so, she was shut out from every house.
Thyrsis would face the blunder they had made—it might have been avoided so easily, and now it was irrevocable!
If he were to mail it, it would be irrevocable; and it would probably mean that he would lose Corydon.
So I was able to shake off that earlier fear of some final and irrevocable destruction truncating all my schemes.
All solicitations were found fruitless with men whose resolutions were fixed and irrevocable.
I said I believed the step was not irrevocable, as one had to stay some time in a convent before taking final vows.
She says she is quite certain that it is irrevocable and that Mrs Housman will never change her mind now.
George talked about Mrs Housman, at least he just alluded to her having become a nun, as if it were a fact and quite irrevocable.
Why, for us every day is a day of judgment—every day is a Dies Iræ, and writes its irrevocable verdict in the flame of its West.