unjoin

English

Etymology

un- +‎ join

Verb

unjoin (third-person singular simple present unjoins, present participle unjoining, simple past and past participle unjoined)

1. (transitive) To separate or detach (things that were joined).
2. (transitive) To cease to be a member of; to leave.
   • 1990, Kurt Gabel, ‎William C. Mitchell, The Making of a Paratrooper

     The leader would say a pleading "Hey, fellas," instead of a commanding and enforcing "Ach-tung!" So I unjoined the Boy Scouts.