verb
confide
kun-FYDE/kənˈfaɪd/
To entrust something private or important to another.
The man quietly confides in an older friend he trusts.

Etymology
The trust root, with con- perhaps adding emphasis, originally described placing faith in someone. Telling that person a secret developed as a particular act of such trust.
In context
I will astonish you with what you shall see and hear, and relieve myself of some of the vexation it gives me to have no one to whom I can confide my secrets,
More examples
- I confide in my sister when something worries me.
- He confided his fears to his doctor.
- She regrets confiding her plans to someone who gossips.
Forms
confide · confides · confided · confiding
confidant noun — A trusted person who receives private information.
confidential adjective — Intended to be kept private or secret.