Loyalty (noun)

1. The quality of being faithful and devoted to a person, country, duty, cause, etc.
2. The state or feeling of being unswervingly supportive.

Origin:

Middle english: from old french loialte, from loial (see loyal).

Examples:

1. His loyalty to his country was unshakable and he served it with distinction.
2. The employees showed their loyalty to the company by working hard and contributing to its success.
3. Her loyalty to her friends was unwavering and she always stood by them.
4. The customers demonstrated their loyalty to the brand by choosing its products over competitors.
5. His loyalty to his principles was admirable and he never wavered from them.