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Negative prefixes: im-, in-, un-

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  • expensive
    inexpensive
  • Polite
    impolite
  • prepared
    unprepared
  • real
    unreal
  • correct
    incorrect
  • sure
    unsure
  • able
    unable
  • friendly
    unfriendly
  • perfect
    imperfect
  • usual
    unusual
  • patient
    impatient
  • secure
    insecure
  • mobile
    immobile
  • happy
    unhappy
  • Believable
    unbelievable
  • frequent
    infrequent
  • possible
    impossible
  • comfortable
    uncomfortable
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