agelong

/ˈeɪdʒlɔːŋ/
adjective
  1. Lasting for a very long time; centuries old.
    • The agelong conflict between the two families finally ended with a peace treaty.
    • The tradition of storytelling is an agelong practice in many cultures.
    • These mountains bear the marks of agelong erosion by wind and water.
Antonyms
What does "agelong" mean? | whatsthatwordmean | whatsthatwordmean