The Affix reference article from the English Wikipedia on 24-Jul-2004
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Affix

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An affix is a morpheme that is attached to a base morpheme to form a word form. An affix can be a prefix (something attached at the front), a suffix (attached at the back), an infix (in between) or a circumfix (two parts, one in front, the other at the back). Affixes are Bound morphemes by definition. Affixes are essential in agglutination.

Example:

See also