in ‧ ter ‧ play /ˈɪntəpleɪ $ -ər-/ BrE AmE noun [uncountable]
[ Word Family: noun : ↑ play , ↑ interplay , ↑ replay , ↑ player , ↑ playfulness ; verb : ↑ play , ↑ outplay , ↑ replay ; adjective : ↑ playful , ↑ playable ; adverb : ↑ playfully ]
the way in which two people or things affect each other
interplay of
the interplay of ideas
interplay between
the interplay between military and civilian populations