What is prefix meaning?

A prefix is a group of letters added to the beginning of a word to change or enhance its meaning. It is a morpheme that attaches to the beginning of a word and modifies its meaning. Prefixes can be used to form new words or change the meaning of existing words. Some common prefixes and their meanings include "un-" (not), "dis-" (opposite or away), "re-" (again or back), "pre-" (before), "post-" (after), "bi-" (two), "tri-" (three), "penta-" (five), and "multi-" (many). Understanding prefixes can help you to better understand the meaning of words and use them more effectively in your communication.