Source : Webster's Revised Unabridged Dictionary (1913)

Costiveness \Cos"tive*ness\, n.
   1. An unnatural retention of the fecal matter of the bowels;
      constipation.

   2. Inability to express one's self; stiffness. [Obs.]

            A reverend disputant of the same costiveness in
            public elocution with myself.         --Wakefield.