ostateczność 英語で:

There was no question that he knew the finality of his next action.

finality /faɪˈnæləti; US / noun [uncountable] the quality of being final and impossible to change the finality of death There was a note of finality in his voice. ‘ No’, she said with finality. ▶ ostateczność nieodwołalność nieodwracalność