This document provides a list and definitions of common English prefixes and suffixes. For prefixes, it gives examples like "un-" meaning "not" as in "unhappy." It lists prefixes such as "de-", "dis-", "ex-", "il-", "im-", "in-", "mis-", "non-", "pre-", "pro-", and "re-". For suffixes, it defines them as groups of letters added after a word's root, like "-less" meaning "without" in "flavorless." Examples of suffixes include "-able", "-al", "-er", "-est", "-ful", "-ible", "-ily", "-ing", "-less", "-ly", and "-ness".