un-2Pronunciation: /ʌn/Translate un- | into Spanish Definition of un- prefix added to verbs: 1denoting the reversal or cancellation of an action or state:untie unsettle 2denoting deprivation, separation, or reduction to a lesser state:unmask unman denoting release:unburden unhandOrigin: Old English un-, on-, of Germanic origin; related to Dutch ont- and German ent-un- in other Oxford dictionaries Definition of un- in the US English dictionary