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Negative prefixes

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  • _ _ regular
    irregular
  • _ _perfect
    imperfect
  • _ _literate
    illiterate
  • _ _possible
    impossible
  • _ _ ususal
    unusual
  • _ _ fortunate
    unfortunate
  • _ _ responsible
    irresponsible
  • _ _ safe
    unsafe
  • _ _ legal
    illegal
  • _ _ helpful
    unhelpful
  • _ _ polite
    impolite
  • _ _irrational
    irrational
  • _ _moral
    immoral
  • _ _ mature
    immature
  • _ _ logical
    illogical
  • _ _tidy
    untidy
  • _ _surprising
    unsurprising
  • _ _ happy
    unhappy
  • _ _ thinkable
    unthinkable
  • _ _ practical
    impractical
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