CONFIDENCE

(CERTAINTY) [noun] [U] - the quality of being certain of your abilities or of trusting other people, plans or the futureHe's got the confidence to walk into a room of strangers and immediately start a conversation. [+ to infinitive]She lacks (self-)confidence. I've never known anyone so timid and unsure of themselves.I have every confidence in her. She'll be perfect for the job.You don't seem to have much confidence in your boss. Isn't she very good?I fear your confidence that you'll succeed is misplaced. [+ that clause]A confidence trick (informal con) is a trick in which a person is cheated into trusting someone enough to give them their money or possessions which are then stolen.A confidence man/trickster (informal con man) is a person who performs confidence tricks.