9 letters · 16 points in Scrabble
noun duration of service
noun the property of being long-lived
originEarly 17th century, learned borrowing from Latin longaevitās, from longaevus (“ancient, aged”) + -itās. The first part is related to English long and this association led to the alternative pronunciation with /ŋ/.
Etymology from Wiktionary, CC BY-SA 3.0