interlocutor (n.)youdaoicibaDictYouDict[interlocutor 词源字典]
1510s, agent noun from Latin interlocut-, past participle stem of interloqui "interrupt," from inter- "between" (see inter-) + loqui "to speak" (see locution). Related: Interlocutory.[interlocutor etymology, interlocutor origin, 英语词源]