irreversible

adjective
  1. 1

    Incapable of being reversed or turned about or back; incapable of being made to run backward.

    โ€œan irreversible engineโ€

  2. 2

    Incapable of being reversed, recalled, repealed, or annulled.

    โ€œan irreversible sentence or decreeโ€

  3. 3

    Incapable of being reversed to the original state without consumption of free energy and increase of entropy.

Source: https://en.wiktionary.org/wiki/irreversible