unestablished

/ˌʌnɪˈstæblɪʃt/
adjective
  1. Not yet proven, recognized, or accepted as valid or reliable.
    • The company's reputation is still unestablished in the international market.
    • He felt insecure in his unestablished career as a freelance artist.
    • The scientist's theory remains unestablished until more experiments confirm it.
  2. Not yet set up or founded in a stable or permanent way.
    • The unestablished garden was just a patch of dirt with a few seeds.
    • They lived in an unestablished neighborhood with few paved roads.
    • The unestablished startup struggled to find its first investors.