hyphening

from The Collaborative International Dictionary of English v.0.48

Hyphen \Hy"phen\, v. t. [imp. & p. p. {Hyphened}; p. pr. & vb.
   n. {Hyphening}.]
   To connect with, or separate by, a hyphen, as two words or
   the parts of a word.
   [1913 Webster]