The document provides definitions and examples of common suffixes in the English language. It discusses suffixes such as -er, -ly, and -est that compare things, as well as suffixes like -ful, -y, and -less that indicate states or conditions. It also defines prefixes like un-, dis-, non- and re- and their meanings of "not" or "again". The purpose is to teach third grade students about how suffixes and prefixes can change the meanings of words.