confidence

noun

1.
freedom from doubt; belief in yourself and your abilities
Derived from:
confident
2.
a feeling of trust (in someone or something)
Antonym:
diffidence
Derived from:
confidential
3.
a state of confident hopefulness that events will be favorable
Derived from:
confident
4.
a trustful relationship
5.
a secret that is confided or entrusted to another