faith
US /feɪθ/
UK /feɪθ/

1.
complete trust or confidence in someone or something
:
•
She has great faith in her doctor.
•
He lost faith in the political system.
2.
strong belief in God or in the doctrines of a religion, based on spiritual conviction rather than proof
:
•
He lives his life according to his religious faith.
•
Many people find comfort in their faith during difficult times.