Source : Webster's Revised Unabridged Dictionary (1913)

Unsex \Un*sex"\, v. t. [imp. & p. p. {Unsexed}; p. pr. & vb. n.
   {Unsexing}.] [1st pref. un- + sex.]
   To deprive of sex, or of qualities becoming to one's sex;
   esp., to make unfeminine in character, manners, duties, or
   the like; as, to unsex a woman.