Stamina (noun)

The ability to sustain prolonged physical or mental effort.

Origin:

From latin stamen, neuter of stamus, meaning "standing".

Examples:

1. He had the stamina to run a marathon.
2. She lacked the stamina to finish the project.
3. The soldiers were proud of their stamina during the long march.
4. He was impressed by her stamina during the heated argument.
5. The team's stamina was tested during the overtime game.