Source : Webster's Revised Unabridged Dictionary (1913)

Unpitious \Un*pi"tious\, a.
   1. Impious; wicked. [Obs.] ``The life of the unpitous.''
      --Wyclif (Prov. xv. 8).

   2. Destitute of pity; pitiless. [Obs.] --Chaucer. --
      {Un*pi"tous*ly}, adv. [Obs.] -- {Un*pi"tous*ness}, n.
      [Obs.] --Wyclif.