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  1. un-
    IPA[ən]
  2. prefix字首

    • 1. (added to adjectives, participles, and their derivatives) denoting the absence of a quality or state; not:

      unabashed unacademic unrepeatable
    • 2. the reverse of (usually with an implication of approval or disapproval, or with another special connotation):

      unselfish unprepossessing unworldly
    • 3. (added to nouns) a lack of:

      unrest untruth
    • prefix字首

      (added to verbs) denoting the reversal or cancellation of an action or state:

      (added to verbs) denoting deprivation, separation, or reduction to a lesser state:

    • abbreviation

      United Nations.
    • contraction

      one:
    • prefix字首

      (added to verbs) denoting the reversal or cancellation of an action or state:

      (added to verbs) denoting deprivation, separation, or reduction to a lesser state:

    • prefix字首

      (added to adjectives, participles, and their derivatives) denoting the absence of a quality or state; not:

      the reverse of (usually with an implication of approval or disapproval, or with another special connotation):

    • contraction

      one:
    • abbreviation

      United Nations.
    • adjective

      not in accordance with American characteristics:

      contrary to the interests of the US and therefore treasonable:

    • noun

      a youngster.
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