Which prefix means 'below'?

The prefix "infra" means 'below' or 'beneath.' It is commonly used in various fields such as medicine, science, and engineering to describe something that is located lower in position or level. For example, in medical terminology, "infrastructure" refers to structures that exist beneath the surface of something else, such as tissues in the body. This prefix effectively conveys the idea of something being positioned underneath another layer or component, making it the appropriate choice in this context.

The other prefixes have distinct meanings: "epi" means 'above' or 'upon,' signifying an upper position; "neo" denotes 'new' or 'recent,' often used to describe new developments; and "pan" translates to 'all' or 'completely,' indicating totality rather than location.