hatch·et 
/ˈhætʃət/ noun
plural hatch·ets /ˈhætʃət/ noun [count] : a small ax that has a short handle
bury the hatchet
: to agree to stop arguing or fighting : to end a disagreement and become friendly
▪ After all these years, they've finally buried the hatchet.
▪ After all these years, they've finally buried the hatchet.
