direfully

from WordNet (r) 3.0 (2006)

direfully
    adv 1: in a direful manner; "seeing himself trapped, he cried
           out direfully"

from The Collaborative International Dictionary of English v.0.48

Direful \Dire"ful\, a. [Dire + -ful.]
   Dire; dreadful; terrible; calamitous; woeful; as, a direful
   fiend; a direful day. -- {Dire"ful*ly}, adv. --
   {Dire"ful*ness}, n.
   [1913 Webster]