insider

US /ɪnˈsaɪ.dɚ/
UK /ɪnˈsaɪ.dɚ/
"insider" picture
1.

內部人士, 知情者

a person within a group or organization, especially someone who has special knowledge or access to information not available to outsiders

:
As an insider, she knew all the secrets of the company.
作為一名內部人士,她知道公司的所有秘密。
The police suspect an insider helped the thieves.
警方懷疑有內部人士幫助了竊賊。