Source : Webster's Revised Unabridged Dictionary (1913)

Helpless \Help"less\, a.
   1. Destitute of help or strength; unable to help or defend
      one's self; needing help; feeble; weak; as, a helpless
      infant.

            How shall I then your helpless fame defend? --Pope.

   2. Beyond help; irremediable.

            Some helpless disagreement or dislike, either of
            mind or body.                         --Milton.

   3. Bringing no help; unaiding. [Obs.]

            Yet since the gods have been Helpless foreseers of
            my plagues.                           --Chapman.

   4. Unsupplied; destitute; -- with of. [R.]

            Helpless of all that human wants require. --Dryden.
      -- {Help"less*ly}, adv. -- {Help"less*ness}, n.

Source : WordNet®

helplessly
     adv : in a helpless manner; "the crowd watched him helplessly"
           [syn: {impotently}, {unable to help}]