expression, godan verb (-ru)
bury the hatchet; make up; be reconciled; get back together
Idiomatic expression meaning to settle a dispute and return to a previous good relationship, or for a separated couple to reunite. Often used with 夫婦 (married couple) or 喧嘩 (fight).
あの夫婦は喧嘩していたが、やっと元の鞘に収まった。
That couple had been fighting, but they finally made up.
After a long conflict, the two countries buried the hatchet.