Definition of un- prefix from the Oxford Advanced Learner's Dictionary



    BrE BrE//ʌn//
    ; NAmE NAmE//ʌn//
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  1. 1(in adjectives, adverbs and nouns) not; the opposite of unable unconsciously untruth
  2. 2(in verbs that describe the opposite of a process) unlock undo More Like This Prefixes a-, ante-, anti-, be-, co-, de-, demi-, dis-, en-, ex-, extra-, hyper-, hypo-, il-, in-, infra-, inter-, intra-, mis-, non-, off-, oft-, out-, over-, para-, post-, pre-, pro-, re-, retro-, semi-, sub-, trans-, ultra-, un-, under-, up-See worksheet.