age-long 
adjective [attributive]
Having existed for a very long time: the will to change age-long habits...
- This change in art is part of the general breakaway from age-long habits of thought that the Greeks achieved in the 5th century BC.
- Take an in-depth look at how science is changing this age-long debate.
- Muslims who care about their families and can afford the age-long tradition travel back to their hometowns to celebrate the biggest Islamic festival.
- subhumanity
- subhumid
- Subic Bay
- sub-ice
- subiculum
- sub-idea
- subimaginal
- subimago
- subimpose
- subincandescent
- subincise
- subincision
- subindicate
- subinduce
- subinfeoffing
- subinfeud
- subinfeudate
- subinfeudation
- subinfeudatory
- subingression
- subinhibitory
- subintellection
- subintelligence
- sub-intention
- subintentional