a.

1. 秘密的；机密的
   confidential information

   机密情报

2. 表示信任的
   She spoke in a confidential tone of voice.

   她用信任的口吻说。

3. 获信任的；参与机密的
   a confidential secretary

   机要秘书

adj.

1. intended to be kept secret.
2. entrusted with private information:
   a confidential secretary.