The Collaborative International Dictionary of English v.0.48:

Barbarize \Bar"ba*rize\, v. t. [Cf. F. barbariser, LL.
   barbarizare.]
   To make barbarous.
   [1913 Webster]

         The hideous changes which have barbarized France.
                                                  --Burke.
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The Collaborative International Dictionary of English v.0.48:

Barbarize \Bar"ba*rize\, v. i. [imp. & p. p. Barbarized; p.
   pr. & vb. n. Barbarizing.]
   [1913 Webster]
   1. To become barbarous.
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            The Roman empire was barbarizing rapidly from the
            time of Trajan.                       --De Quincey.
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   2. To adopt a foreign or barbarous mode of speech.
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            The ill habit . . . of wretched barbarizing against
            the Latin and Greek idiom, with their untutored
            Anglicisms.                           --Milton.
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WordNet (r) 3.0 (2006):

barbarize
    v 1: become crude or savage or barbaric in behavior or language
         [syn: barbarize, barbarise]
    2: make crude or savage in behavior or speech; "his years in
       prison have barbarized the young man" [syn: barbarize,
       barbarise]