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In grammar, a suffix is a type of affix, which is a word part attached to a word, stem, or phrase. Suffixes are added to the end of a word to create a new word or an inflectional form of a word. For example, adding "-ful" to "wonder" creates "wonderful," and adding "-ed" to "ask" creates "asked".12

Suffixes can change a word's meaning or its grammatical function. They are used in inflection, which modifies a word to indicate tense, number, or other grammatical distinctions without changing its part of speech. Suffixation is the process of forming or inflecting words using suffixes. English uses suffixes extensively, with examples like "-er" denoting a doer ("worker"), an instrument ("roller"), or a dweller ("Londoner").345

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