Quality of being defensible, protectability

ETYM Latin durabilitas.
The state or quality of being durable; the power of uninterrupted or long continuance in any condition; the power of resisting agents or influences which tend to cause changes, decay, or dissolution; lastingness.

(Homonym: ware, where).
1. Impairment resulting from long use.
2. The act of wearing; SYN. wearing.