This document discusses prefixes, suffixes, and root words. It provides examples of how prefixes are added to the beginning of words to change their meaning, such as "unhappy" and "redo." Suffixes are added to the end of words, as in "wonderful" and "restful." The document also discusses identifying base words, roots, and using context clues and word parts to determine a word's meaning. It emphasizes the importance of understanding Greek and Latin roots to help determine the meaning of unfamiliar words.