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Look up prefix in Wiktionary, the free dictionary.

A prefix is an affix which is placed before the root of a word. Particularly in the study of languages,a prefix is also called a preformative, because it alters the form of the words to which it is affixed. For an example:

Examples of prefixes:

• unhappy : un is a negative or antonymic prefix.
• prefix, preview : pre is a prefix, with the sense of before
• redo, review. : re is a prefix meaning again.

The word prefix is itself made up of the stem fix (meaning attach, in this case), and the prefix pre- (meaning "before"), both of which are derived from Latin roots.

See also

• English prefixes
• List of Greek and Latin roots in English
• Suffix

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