confidential

1.机密的、保密的、秘密的
confidential information 机密情报
confidential documents 机密文件
Your medical records are strictly confidential.
你的病历是绝对保密的。

2.隐秘的、秘密的（说话方式）
He spoke in a confidential tone, his voice low.
他低声用隐秘的语气说话。

3.受信任的、委以机密的
a confidential secretary 机要秘书

confidentially adv.
She told me confitially that she is going to retire early.
她私下告诉我她要提前退休。

confidentiality
n.
保密性、机密性

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