self-formed

adjective

ˌself-ˈfȯrmd 

: formed or developed by one's own efforts

At present, teams in the U.S. are self-formed and made up of players who balance curling with their fulltime jobs.

—Steve Douglas

… the greatest pressure they felt was the pressure to act in fidelity and concordance with their self-formed identity and convictions.

—Arthur Schwartz

Word History

First Known Use

1642, in the meaning defined above