durability; staying power; endurance
Refers to the ability to continue or persist over time, often used for physical stamina, mental perseverance, or the lasting quality of objects.
This battery has long-lasting durability.
I admire his staying power.
持久力 is often used for physical endurance in sports, whereas 持続力 can apply to both physical and abstract persistence.
Compound of 持続 (continuation) and 力 (power). The exact historical derivation is straightforward; the word is a modern Sino-Japanese compound.