A prefix is an affix which is placed before the stem of a word. Adding it to the beginning of one word changes it into another word. For example, when the prefix un- is added to the word happy, it creates the word unhappy.

What is an example of a prefix word?

A prefix is a group of letters placed before the root of a word. For example, the word “unhappy” consists of the prefix “un-” [which means “not”] combined with the root (or stem) word “happy”; the word “unhappy” means “not happy.”

What is a suffix word example?

countable noun. A suffix is a letter or group of letters, for example '-ly' or '-ness,' which is added to the end of a word in order to form a different word, often of a different word class. For example, the suffix '-ly' is added to 'quick' to form 'quickly.