self-sacrifice

/S EH1 L F S AE0 K R AH0 F AY0 S/
noun
  1. 1

    The giving up of one's own benefit, especially giving up one's life, for the good of others.

    โ€œHis brave self-sacrifice won him a posthumous medal, but I think he'd have preferred to receive it in person.โ€

Source: https://en.wiktionary.org/wiki/self-sacrifice