ineffectually

from WordNet (r) 3.0 (2006)

ineffectually
    adv 1: in an ineffectual manner; "she tried ineffectually to
           light the primus, and Thomas came to help her" [ant:
           {effectually}]

from The Collaborative International Dictionary of English v.0.48

Ineffectually \In`ef*fec"tu*al*ly\, adv.
   Without effect; in vain.
   [1913 Webster]

         Hereford . . . had been besieged for about two months
         ineffectually by the Scots.              --Ludlow.
   [1913 Webster]