take into confidence

take (someone) into (one's) confidence

To tell someone information with the understanding that they will not reveal what was said. Daniel, we've taken you into our confidence to discuss the direction of the company, and where we see you fitting into it. You're the only person I've taken into my confidence about this, so please don't discuss it with anyone else.
See also: confidence, take
Farlex Dictionary of Idioms.

take someone into one's confidence

to trust someone with confidential information; to tell a secret to someone and trust the person to keep the secret. We are good friends, but I didn't feel I could take her into my confidence. I know something very important about Jean. Can I take you into my confidence?
See also: confidence, take
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • whistleblower
  • whistle-blower
  • get (something) off (one's) chest
  • get off chest
  • get something off your chest
  • off one's chest, get
  • come out against
  • come out against (someone or something)
  • don't tell a soul
  • not tell a soul