This document provides information on common prefixes and suffixes in the English language. It lists the 20 most frequent prefixes and suffixes and their meanings. Knowing these affixes can help understand the meanings of thousands of words. The top 4 prefixes account for 97% of prefixed words, and the top 4 suffixes also account for 97% of suffixed words. Learning these common prefixes and suffixes can enhance your vocabulary and ability to understand new words.