What is a prefix?

A prefix is a word part that is added to the beginning of a word to change its meaning. It's like a little extra piece that gives the word a new twist.

Here's an example:

* Un + happy = Unhappy

In this case, the prefix "un" means "not", so "unhappy" means "not happy".

Here are some other common prefixes:

* Pre (before): pre-game, pre-school

* Re (again): rewind, redo

* Dis (not): disagree, dislike

* Mis (wrongly): misspell, misunderstand

* Anti (against): antibiotic, anti-gravity

Prefixes can help us understand the meaning of a word, even if we don't know the whole word itself. They're like little clues that help us decipher the language.