mediator

老师经常充当学生和家长之间的调解人。

The teacher often serves as a ___mediator between students and parents.

老师在同学争吵时充当调解人，帮助他们和好。

The teacher acted as a ___mediator when the students argued, helping them make up.

村民们尊敬这位老人，因为他总是作为公正的调解者解决纠纷。

The villagers respect this elder because he always acts as a ___mediator in settling disputes.