Self-confidence (noun)

1. A feeling of trust in one's abilities, qualities, and judgment.
2. A belief in oneself and one's powers or abilities.

Origin:

Compound of self and confidence, from self + confidence.

Examples:

1. He has a lot of self-confidence, he is able to speak in public without any problem.
2. She lacked self-confidence, so she avoided meeting new people.
3. It"s important to have self-confidence when you"re trying to succeed in life.
4. A lack of self-confidence can be a major obstacle in achieving your goals.
5. He had to build up his self-confidence before he could ask her out on a date.