con·clave
noun/ˈkɒŋkleɪv/
/ˈkɑːnkleɪv/
(formal)- a meeting to discuss something in private; the people at this meeting
秘密会议；秘密会议与会者 Word Originlate Middle English (denoting a private room): via French from Latin conclave ‘lockable room’, from con- ‘with’ + clavis ‘key’.