Durable means something that is strong and lasts a long time.
The actual meaning from a dictionary
du⋅ra⋅ble
/ˈdʊərəbəl, ˈdyʊər-/ Show Spelled Pronunciation [door-uh-buhl, dyoor-] Show IPA
–adjective 1. able to resist wear, decay, etc., well; lasting; enduring.