The Collaborative International Dictionary of English v.0.48:

Syllabify \Syl*lab"i*fy\, v. t. [imp. & p. p. Syllabified; p.
   pr. & vb. n. Syllabifying.] [L. syllaba syllable + -fy.]
   To form or divide into syllables.
   [1913 Webster]

WordNet (r) 3.0 (2006):

syllabify
    v 1: divide into syllables; "syllabify the words" [syn:
         syllabify, syllabicate, syllabize, syllabise]