full trust; belief in the powers, trustworthiness, or reliability of a person or thing

We have every confidence in their ability to succeed.

belief in oneself and one's powers or abilities; self-confidence; self-reliance; assurance

His lack of confidence defeated him.

certitude; assurance

He described the situation with such confidence that the audience believed him completely.

a confidential communication

to exchange confidences.

(esp. in European politics) the wish to retain an incumbent government in office, as shown by a vote in a particular issue

a vote of confidence.

presumption; impudence

Her disdainful look crushed the confidence of the brash young man.

Archaic . something that gives confidence; ground of trust. ?

in confidence, as a secret or private matter

not to be divulged or communicated to others; with belief in a person's sense of discretion

I told him in confidence.

noun

uncertainty , unconfidence , apprehension , distrust , doubt , fear

noun

aplomb , assurance , backbone , boldness , brashness , certainty , cool , courage , daring , dash , determination , elan , faith in oneself , fearlessness , firmness , fortitude , grit , hardihood , heart , impudence , intrepidity , mettle , morale , nerve , pluck , poise , presumption , reliance , resoluteness , resolution , self-possession , self-reliance , spirit , spunk , sureness , tenacity , credence , dependence , faith , hope , stock , store , sure bet , trust , belief , self-assurance , self-confidence , assuredness , certitude , conviction , positiveness , surety , bravura , credit , doughtiness , effrontery , guts , personal , positivism , secret , tour de force