intermediary

名词 intermediary:

1. a negotiator who acts as a link between parties
   同义词：mediator, go-between, intermediator, intercessor

1. They disliked each other too much to meet, so they conducted all their business through an intermediary.
   他们彼此交恶不愿相见，有事均通过中间人处理。

in.ter.me.di.ar.y

adj.（形容词）
Existing or occurring between; intermediate.
中间的：在…之间存在或发生的；居间的
Acting as a mediator or an agent between persons or things.
调解的：在人或事物之间充当调解人或中介的
n.（名词）
【复数】 in.ter.me.di.ar.ies
One that acts as a mediator.
调解人：充当调解人的人
One that acts as an agent between persons or things; a means.
媒介：在人或事物之间充当中介的人；一种手段
An intermediate state or stage.
中间状态：中间形态或中间阶段

来源：
Probably French intermédiaire
可能为 法语 intermédiaire
from Late Latin intermedius [intermediate] * see intermediate
源自 后期拉丁语 intermedius [中间的] *参见 intermediate