preexist
verbNAmE//ˌpriɪɡˈzɪst//
[intransitive]Verb Forms present simple I / you / we / they preexist he / she / it preexists past simple preexisted -ing form preexistingNAmE//ˌpriɪɡˈzɪstənt//
adjectiveCheck pronunciation: preexist
Definition of preexist verb from the Oxford Advanced American Dictionary