Which prefix meaning 'between' is used in a word?

• A. inter-
• B. intra-
• C. trans-
• D. peri-

Answer: (A)

The main idea here is how prefixes show relationships between parts of a whole. The prefix that means “between” is inter-. It signals a connection or interaction that links two or more things or places, which is exactly what “between” describes. You can see this in words like interstate (between states), international (between nations), and interact (to act between or among people or things). That sense of linking or being in the middle of separate parts is what inter- conveys best.

Other prefixes shift the meaning in different directions. Intra- means within, inside the boundaries of one thing. Trans- means across or beyond, moving from one side to another. Peri- means around or surrounding. None of these carry the same sense of “between,” so inter- fits the clue precisely.