inter- means between, among

interactive (adj) - involving people playing among themselves; an exchange of activity of information between people or people and a computer

interfere (v) - to get in between two people when it is not your problem or issue

interject (v) - to throw a remark into a conversation between two or more people

intermission (n) - the break between parts of a play, opera, or concert

international (adj) - between or among the nations of the world

Internet (n) - the worldwide computer system that allows communication and information sharing among people

interpersonal (adj) - between people (usually describing social activities)

interpreter (n) - a person who helps translate the languages between different people

interrupt (v) - to break into a conversation between people

interstate (adj) - between the states