Confidence

[kon-fi-duh ns] /ˈkɒn fɪ dəns/

noun
1.
full trust; belief in the powers, trustworthiness, or reliability of a person or thing:
We have every confidence in their ability to succeed.
2.
belief in oneself and one’s powers or abilities; self-confidence; self-reliance; assurance:
His lack of confidence defeated him.
3.
certitude; assurance:
He described the situation with such confidence that the audience believed him completely.
4.
a secret that is confided or imparted trustfully:
The friends exchanged many confidences over the years.
5.
(especially 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.
6.
presumption; impudence:
Her disdainful look crushed the confidence of the brash young man.
7.
Archaic. something that gives confidence; ground of trust.
Idioms
8.
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.
/ˈkɒnfɪdəns/
noun
1.
a feeling of trust in a person or thing: I have confidence in his abilities
2.
belief in one’s own abilities; self-assurance
3.
trust or a trustful relationship: take me into your confidence
4.
something confided or entrusted; secret
5.
in confidence, as a secret
n.

early 15c., from Middle French confidence or directly from Latin confidentia, from confidentem (nominative confidens) “firmly trusting, bold,” present participle of confidere “to have full trust or reliance,” from com-, intensive prefix (see com-), + fidere “to trust” (see faith). For sense of “swindle” see con (adj.).
In addition to the idiom beginning with
confidence