The Collaborative International Dictionary of English v.0.48:

Pitying \Pit"y*ing\, a.
   Expressing pity; as, a pitying eye, glance, or word. --
   Pit"y*ing*ly, adv.
   [1913 Webster]

WordNet (r) 3.0 (2006):

pityingly
    adv 1: in a compassionate manner; "the nurse looked at him
           pityingly" [syn: pityingly, compassionately]