Learn how to say Interactiveness correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word interactive:
(of two people or things) influencing each other:
fully sighted children in interactive play with others with defective vision
allowing a two-way flow of information between a computer and a computer-user; responding to a user’s input:
a fully interactive map of the area
mid 19th century: from interact, on the pattern of active