Self-assurance. / A feeling of certainty; firm trust or belief; faith. / Information held in secret; a piece of information shared but to thence be kept in secret. / (dated) Boldness; presumption.

plural of confidence

Confidentially, privately, off the record.

Very sure of something; positive. / Self-assured, self-reliant, sure of oneself. / (obsolete, in negative sense) Forward, impudent.

Obsolete form of confidant.

In a confident manner; with confidence; with strong assurance; positively.

A person in whom one can confide or share one's secrets: a friend.

simple past tense and past participle of confide

(intransitive, now rare) To trust, have faith (in). / (transitive, dated) To entrust (something) to the responsibility of someone.

Able to be entrusted with secrets, or private information. / Able to keep silent concerning other's secrets, or private information.