The Collaborative International Dictionary of English v.0.48:

Versify \Ver"si*fy\, v. i. [imp. & p. p. Versified; p. pr. &
   vb. n. Versifying.] [OE. versifien, F. versifier, L.
   versificare; versus a verse + -ficare to make. See Verse,
   and -fy.]
   To make verses.
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         I'll versify in spite, and do my best.   --Dryden.
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The Collaborative International Dictionary of English v.0.48:

Versify \Ver"si*fy\, v. t.
   1. To relate or describe in verse; to compose in verse.
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            I'll versify the truth, not poetize.  --Daniel.
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   2. To turn into verse; to render into metrical form; as, to
      versify the Psalms. --Chaucer.
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WordNet (r) 3.0 (2006):

versify
    v 1: compose verses or put into verse; "He versified the ancient
         saga" [syn: verse, versify, poetize, poetise]