Source : Webster's Revised Unabridged Dictionary (1913)

Effeminateness \Ef*fem"i*nate*ness\, n.
   The state of being effeminate; unmanly softness. --Fuller.

Source : WordNet®

effeminateness
     n : the trait of being effeminate (derogatory of a man) [syn: {effeminacy},
          {sissiness}, {womanishness}, {unmanliness}]