Something that is built to last is durable. Your most durable pair of hiking boots will last you through your trek to the summit of Mount Everest.
Anything that's long-lasting, sturdy, or doesn't bend under pressure can be described as durable. You could have a durable relationship with your oldest friend, durable tires on your car, and a durable umbrella — they won't let you down or break. The Latin root of durable is durabilis, which means "lasting or permanent," and comes from durare, "to harden."