feminize

from WordNet (r) 3.0 (2006)

feminize
    v 1: assume (more) feminine characteristics; "feminized
         language"; "feminized frogs" [syn: {feminize}, {feminise}]
    2: to give a (more) feminine, effeminate, or womanly quality or
       appearance to; "This hairdo feminizes the man" [syn:
       {feminize}, {feminise}, {effeminize}, {effeminise},
       {womanize}]

from The Collaborative International Dictionary of English v.0.48

Feminize \Fem"i*nize\, v. t. [Cf. F. f['e]miniser.]
   To make womanish or effeminate. --Dr. H. More.
   [1913 Webster]