longevity
noun /lɒnˈdʒevəti/
  /lɔːnˈdʒevəti/
[uncountable] (formal)- long life; the fact of lasting a long time- We wish you both health and longevity.
- He prides himself on the longevity of the company.
 Word Originearly 17th cent.: from late Latin longaevitas, from Latin longus ‘long’ + aevum ‘age’.