durable indestructible perdurable undestroyable
durable%5:00:00:imperishable:00 indestructible%5:00:00:imperishable:00 perdurable%5:00:00:imperishable:00 undestroyable%5:00:00:imperishable:00
neuničljiv trajen trpežen
very long lasting
less durable rocks were gradually worn away to form valleys the perdurable granite of the ancient Appalachian spine of the continent