confidential /ˌkɑːnfəˈdɛnʃəl/ adjective /ˌkɑːnfəˈdɛnʃəl/
adjective
Learner's definition of CONFIDENTIAL
1
[more confidential; most confidential] : secret or private机密的；秘密的 -
These documents are completely/strictly confidential.这些是绝密文件。
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confidential medical records机密病历
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Someone was leaking confidential information [=telling secrets] to the press.有人向新闻界泄露了机密情报。
2
[more confidential; most confidential] : showing that you are saying something that is secret or private（说话方式）隐秘的，秘密的 -
“I have something to tell you,” John said in a confidential tone/voice.“我有件事要告诉你。”约翰以隐秘的语气说道。
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Her voice was quiet and confidential.她的声音很轻而且很隐秘。
3
always used before a noun : trusted with secret or private information受信任的；掌握机密的
— confidentially
adverb -
Students can confidentially report any problems they see in their schools.学生在学校里发现任何问题，都可以秘密举报。
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He leaned forward confidentially and began telling his story.他神秘兮兮地俯身向前，开始讲述他的经历。
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Confidentially, I don't think she's very good at her job.私下里说，我认为她不太胜任自己的工作。