insider

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

内部人士, 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.
作为一名内部人士,她知道公司的所有秘密。
The police suspect an insider helped the thieves.
警方怀疑有内部人士帮助了窃贼。