staying power (noun)

1. The comedian's staying power was evident as he delivered joke after joke, keeping the audience laughing for hours.

2. Through endless prayer and unwavering faith, the monk exhibited staying power in his commitment to his religious beliefs.

3. Superman, with his incredible strength and enduring energy, epitomizes the staying power of a superhero.

4. The Roman Empire's staying power can be attributed to its formidable military strength and efficient governance.