-the word class that qualifies verbs or clauses
-a word that modifies something other than a noun
-a word used for describing a verb, an adjective, another adverb, or a whole sentence. Adverbs in English often consist of an adjective with "-ly" added, for example "quickly," "mainly," and "cheerfully."

See Also

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Sympsionics
Sympsionics Example Equations
Sympsionics FAQ
Sympsionics Numbers
Sympsionics Operators
Sympsionics Standards and Rules