Long-standing

alt

(having existed for a long time)

altbewährt

(having been done for long enough time to become convention)

alteingeführt

(having been done for long enough time to become convention)

altgedient

(having existed for a long time)

altgedient

(having been done for long enough time to become convention)

eingeführt

(having been done for long enough time to become convention)

jahrelang

(having existed for a long time)

langbestehend

(having existed for a long time)

langgedient

(having existed for a long time)

langjährig

(having existed for a long time)

seit langer Zeit bestehend

(having existed for a long time)