Source : Webster's Revised Unabridged Dictionary (1913)

Nerveless \Nerve"less\, a.
   1. Destitute of nerves.

   2. Destitute of strength or of courage; wanting vigor; weak;
      powerless.

            A kingless people for a nerveless state. --Byron.

            Awaking, all nerveless, from an ugly dream.
                                                  --Hawthorne.

Source : WordNet®

nerveless
     adj 1: marked by calm self-control (especially in trying
            circumstances); unemotional; "play it cool"; "keep
            cool"; "stayed coolheaded in the crisis"; "the most
            nerveless winner in the history of the tournament"
            [syn: {cool}, {coolheaded}]
     2: lacking strength; "a weak, nerveless fool, devoid of energy
        and promptitude"- Nathaniel Hawthorne [syn: {feeble}]