The Collaborative International Dictionary of English v.0.48:

Daintify \Dain"ti*fy\, v. t. [imp. & p. p. Daintified; p. pr.
   & vb. n. Daintifying.] [Dainty + -fy.]
   To render dainty, delicate, or fastidious. "Daintified
   emotion." --Sat. rev.
   [1913 Webster]