+**Un** is a common [prefix](/wiki/prefix) in the English language, primarily used to denote negation, opposition, or the reversal of an action or state. It transforms words, indicating a quality of being [not](/wiki/not) or an undoing. Its simple form conveys a fundamental shift in meaning.
+## See also
+- [Affix](/wiki/affix)
+- [Suffix](/wiki/suffix)
+- [Grammar](/wiki/grammar)
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