per·du·ra·ble 
(pər-drə-bəl, -dyr-)
(pər-drə-bəl, -dyr-)adj.
Extremely durable; permanent.
[Middle English, from Old French, from Late Latin perdūrābilis, from Latin perdūrāre, to endure : per-, per- + dūrāre, to last; see deuə- in the Appendix of Indo-European roots.]
per·du′ra·bili·ty n.
per·dura·bly adv.