in·ter·play


-noun
1. a reciprocal relationship, action, or influence: the interplay of plot and character.
2. "... also generates its own species of discussion and merges architectural languages with other languages of process and models of interplay." Easterling, p. 9.
3. "...activity and exchange within an environment." Easterling, p. 9.


-verb (used without object)
4. to exert influence on each other.


References - Organization Space: landscapes, highways, and houses in America, Keller Easterling; www.dictionary.reference.com