bury the hatchet

/B EH1 R IY0 DH AH0 AE0 CH AH0 T/
verb
  1. 1

    To stop fighting or arguing; to reach an agreement, or at least a truce.

    โ€œThey need to calm down and bury the hatchet before someone gets hurt.โ€

Source: https://en.wiktionary.org/wiki/bury%20the%20hatchet