The Collaborative International Dictionary of English v.0.48:
Despairing \De*spair"ing\, a. Feeling or expressing despair; hopeless. -- De*spair"ing*ly, adv. -- De*spair"ing*ness, n. [1913 Webster]WordNet (r) 3.0 (2006):
despairingly adv 1: with desperation; "`Why can't you understand?,' she asked despairingly" [syn: despairingly, despondently]