interpsychic

adjective

in·​ter·​psy·​chic ˌin-tər-ˈsī-kik 

: involving, relating to, or arising from the interaction between the psyches of two or more people

Interpsychic problems are those we have because others frustrate us.

—Michael E. Bernard

compare intrapsychic

interpsychically

ˌin-tər-ˈsī-ki-k(ə-)lē 

adverb

Word History

First Known Use

1906, in the meaning defined above