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a grammatical element that is combined with a word, stem, or phrase to produce derived and inflected forms. There are three types of affixes: prefixes, infixes, and suffixes. A prefix occurs at the beginning of a word or stem (sub-mit, pre-determine, un-willing); a suffix at the end (wonder-ful, depend-ent, act-ion); and an infix occurs in the middle. English has no infixes, but they are found in American Indian languages, Greek, Tagalog, and elsewhere. Examples of English inflectional suffixes are illustrated by the -s of "cats," the -er of "longer," and the -ed of "asked." See also morphology