Which prefix means "between"?

The prefix that means "between" is "inter." This prefix is commonly used in various terms, such as "interstate" (between states) and "interpersonal" (between people). It conveys the idea of connectivity or interaction among entities or individuals.

Understanding the use of "inter" as a prefix can be particularly important in medical and health-related contexts, where communication often requires clarity in terms of relationships or interactions between different systems, populations, or conditions.

In contrast, the prefix "intra" refers to "within" or "inside," indicating something that occurs within a single entity or structure. For example, "intravenous" relates to something happening within a vein. The prefix "retro" means "backward" or "behind," as seen in terms like "retroactive." Lastly, "micro" denotes something small or tiny, commonly used in terms like "microorganism." Each of these prefixes conveys distinct meanings that do not align with the concept of "between."