reinstatement

/R IY0 IH0 N S T EY1 T M AH0 N T/
noun
  1. 1

    The act of restoring something to its previous state.

    โ€œMany people are unhappy with the sacking of the chief constable and demand his immediate reinstatement.โ€

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