The prefix "per-" is best defined as what?

The prefix "per-" is best defined as "through." In medical terminology, this prefix is commonly used to indicate that something is happening thoroughly or completely, as well as to reflect movement or passages within. For instance, terms like "percutaneous" refer to procedures done through the skin, highlighting the aspect of going through layers. Understanding this prefix aids in comprehending various medical terms, which often depict procedures or processes that involve movement or action throughout an area or system.