If you do something irrevocably, there's no going back. Irrevocably describes an action that can't be changed or reversed.

When something's done permanently, it's happened irrevocably. If you break off a friendship irrevocably, it's final; you will never regain that friend again. Irrevocably comes from the Latin word irrevocabilis, meaning "unable to be recalled or reversed."

Definitions of irrevocably

adv in an irrevocable manner

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