nonantagonistic

adjective

non·​an·​tag·​o·​nis·​tic ˌnän-(ˌ)an-ˌta-gə-ˈni-stik 

: not marked by or resulting from opposition or hostility : not antagonistic

a nonantagonistic relationship

Their interaction with the local population is nonantagonistic, although few friendships have been forged.

—David B. Cole

Word History

First Known Use

1850, in the meaning defined above