permanence
noun /ˈpɜːmənəns/
  /ˈpɜːrmənəns/
(also less frequent permanency 
 [uncountable] /ˈpɜːmənənsi/
  /ˈpɜːrmənənsi/
)- the state of lasting for a long time or for all time in the future
- The spoken word is immediate but lacks permanence.
 - We no longer talk of the permanence of marriage.
 - lacking a sense of permanence in his life
 
Word Originlate Middle English: from medieval Latin permanentia (perhaps via French), from permanent- ‘remaining to the end’, from the verb permanere.