con·fi·dence 
(kŏnfĭ-dəns)
(kŏnfĭ-dəns)n.
1.
a. A belief or conviction that an outcome will be favorable: I have every confidence that we can find a solution.
b. Belief in the certainty of something: The engineers determined with confidence that the ship could withstand heavy seas.
2. Belief in the effectiveness of one's own abilities or in one's favorable acceptance by others; self-confidence.
3. Trust or faith in a person or thing: We are placing our confidence in you to get the job done. See Synonyms at trust.
4. A trusting relationship: I took them into my confidence.
5.
a. That which is confided; a secret: A friend does not betray confidences.
b. A feeling of assurance that a confidant will keep a secret: I am telling you this in strict confidence.
adj.
Of, relating to, or involving a swindle or fraud: a confidence scheme; a confidence trickster.