interlocutor

1. N-COUNT Your interlocutor is the person with whom you are having a conversation. 谈话对象[正式] [oft poss N]

Orion had the habit of staring motionlessly at his interlocutor. 奥利恩有个一动不动地盯着谈话对象的习惯。

2. N-COUNT If a person or organization has a role as an interlocutor in talks or negotiations, they take part or act as a representative in them. 谈话参与者; 谈判代表[正式]

...key interlocutors in the Middle East conference. ...中东大会的主要谈话参与者们。