Tenacity (noun)

The quality or fact of being able to grip something firmly; grip; the quality of being able to hold on to an object firmly; the quality of sticking to something; persistence, determination, the ability to maintain a purpose or belief in the face of obstacles.

Origin:

From latin tenacitas, from tenax ("holding fast").

Examples:

1. The plant had tenacity to survive in the desert.
2. She had tenacity to finish the marathon.
3. The athlete had tenacity to win the game.
4. He had tenacity to hold on to his idea.
5. The company had tenacity to survive the recession.