The document discusses prefixes, roots, and suffixes. It provides examples of common prefixes like "a-", "anti-", "co-", and "trans-" and their meanings. Roots are word parts that form the base of other words through addition of prefixes and suffixes. Examples of roots include "voc-" meaning "word" and "audi-" meaning "hear". Suffixes can change the word class or meaning and examples include "-ness" to form nouns and "-ize"/"-ify" to form verbs. The document outlines different types of prefixes, suffixes, and their functions in word formation.