What does "long-livedness" mean?

The state or condition of being long-lived; longevity.

What is a synonym for "long-livedness"?

Common synonyms include: age, antiquity, constancy, continuance, duration, endurance.

Pronounced //ˈlɒŋˈlaɪvɪdnɪs//.

/ˈlɒŋˈlaɪvɪdnɪs/ noun

noun ·Rare ·Advanced level

Noun

From long-lived + -ness.