Which suffix indicates something pertaining to?

The suffix that indicates something pertaining to is indeed -al. This suffix is commonly used in medical terminology to create adjectives that describe relationships or characteristics related to a particular subject. For instance, in terms like "renal" (pertaining to the kidneys) or "cardial" (pertaining to the heart), the suffix -al modifies root words to express the relationship.

In contrast, -ectomy refers to a surgical removal (as in appendectomy), -emia signifies a condition related to blood (such as anemia), and path/o is a combining form that relates to disease but does not function as a suffix on its own. Understanding the use of -al helps in deciphering the meanings of various medical terms, making it an essential component of medical language.