Which prefix corresponds to the meaning 'inward'?

The prefix 'eso-' is derived from the Greek word "esō," meaning 'inside' or 'within.' It indicates something pertaining to being inward or internal. In medical terminology, this prefix is often used to describe conditions or structures that are located internally within the body. For instance, 'esophagitis' refers to inflammation within the esophagus.

The other prefixes have distinctly different meanings that do not relate to 'inward.' 'Exo-' means 'outside' or 'external,' suggesting something that is outward or away from the center. 'Infer-' relates to below or beneath something. 'Para-' commonly means 'beside' or 'alongside,' indicating a position that is close but not directly within. Therefore, 'eso-' is the only prefix that directly aligns with the meaning of 'inward.'