interactive
an exchange of activity or information between people
interfere
to get between two people when it is not your problem
interpreter
a person who helps translate the languages between different people
intermission
a break between parts of a play, or concert
interject
to throw a remark into a conversation between two or more people
international
between or among the nations of the world
internet
the worldwide computer system that allows communication and information sharing among people
interpersonal
between people (usually describing social activities)
interrupt
to break into a conversation between people
interstate
between the states