Source : Webster's Revised Unabridged Dictionary (1913)

Pitying \Pit"y*ing\, a.
   Expressing pity; as, a pitying eye, glance, or word. --
   {Pit"y*ing*ly}, adv.

Source : WordNet®

pityingly
     adv : in a compassionate manner; "the nurse looked at him
           pityingly" [syn: {compassionately}, {with compassion},
           {with pity}]