perduration
/ˌpəːdjʊˈreɪʃn/ /ˌpəːdʒʊˈreɪʃn/noun
The action of enduring or capacity to endure indefinitely; continuous duration; existence having neither beginning nor end.
Origin
Late Middle English. From post-classical Latin perduration-, perduratio action of enduring from classical Latin perdūrāt-, past participial stem of perdūrāre + -iō.