| A | B |
| Interfere | to get in between two people when it is not your problem or issue |
| Interject | to throw a remark into a conversation between two or more people |
| Intermission | the break between parts of a play |
| 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 |
| Interpreter | a person who helps translate the languages between different people |
| Interrupt | to break into a conversation between people |
| Intradermal | within the layers of the skin |
| Intranasal | within the nose |
| Intraocular | within the eye |
| Intrapsychic | within the mind |