My father and I have agreed finally to settle our differences.

settle 是动词，意思是"解决、处理、达成一致"。这个词来源于古英语，本义是"使安定、使稳定"，引申为"解决争端"或"达成协议"的意思。settle our differences 表示"解决分歧"或"消除分歧"。