Stalwart (adjective)

1. Firm and resolute in purpose or belief; determined.
2. Steady in allegiance or duty; loyal.
3. Brave and determined; stout-hearted.
4. Physically strong and sturdy.

Origin:

From middle english stalwart, stauwart, from old english stælwearde "one who guards the stall or stable".

Examples:

1. He was a stalwart supporter of the party.
2. She was a stalwart defender of human rights.
3. The general was a stalwart leader who never wavered in the face of danger.
4. The company's stalwart workers have been with the company for over 20 years.
5. He was considered a stalwart member of the community.