What is a word part that is added at the end called?

A word part added at the end of a word is known as a suffix. Suffixes are used to modify the meaning of the root word to which they are added, affecting the term's tense, condition, quality, or the type of word it is (such as changing a noun to an adjective). For example, in the word "happiness," the root "happy" is modified by the suffix "-ness," which transforms it from an adjective to a noun representing a state or quality. Understanding suffixes is critical in medical terminology as they provide essential context about conditions, procedures, and anatomical parts.