不经司法或行政部门，私下了结to settle out of court

• 后来车辆刮擦事件俩人私了了，省时省力。

  Later, the two people involved in the vehicle collision settled out of court, saving time and effort.

• 解决医疗纠纷，医患双方私了需谨慎。

  In resolving medical disputes, doctors and patients must both be careful when settling out of court.