Some species on the island pre-existed the arrival of humans.

Some traditions pre-exist the modern festivals, yet their meanings have been largely forgotten.

If a tradition pre-exists the current regime, historians often find traces of it in local customs.

Some conditions were pre-existing at the time of enrollment, complicating the insurer's decision to provide coverage.

She discovered a pre-existent manuscript hidden behind the false wall.

Because the insurer identified a pre-existing condition, her claim was initially denied.