have no staying power

to lack endurance; not to be able to last. Sally can swim fast for a short distance, but she has no staying power. That horse can start fairly fast, but it has no staying power.

Common Names:

Name	Pronounced	Usage
ŽAna	-	Slovene, Croatian
Bahadir	-	Turkish
Yngvar	-	Norwegian
Nefertari	nef-ər-TAHR-ee (English)	Ancient Egyptian
Barr	[ba:]
Egilhard	-	Ancient Germanic