Fidelity (noun)

1. Loyalty or faithfulness to a person, cause, or duty.
2. The degree of exactness with which something is copied or reproduced.

Origin:

Fidelity (n) late middle english: from old french fidelite, from latin fidelitas, from fidelis "faithful".

Examples:

1. She had a strong sense of fidelity to her country.
2. He always had fidelity to his friends.
3. The fidelity of the copy was impressive.
4. Fidelity to one's principles is important.
5. The fidelity of the recording was excellent.