sleeplessly

from WordNet (r) 3.0 (2006)

sleeplessly
    adv 1: without sleep; in a sleepless manner; "he was lying in
           bed sleeplessly"

from The Collaborative International Dictionary of English v.0.48

Sleepless \Sleep"less\, a.
   1. Having no sleep; wakeful.
      [1913 Webster]

   2. Having no rest; perpetually agitated. "Biscay's sleepless
      bay." --Byron.
      [1913 Webster] -- {Sleep"less*ly}, adv. --
      {Sleep"less*ness}, n.
      [1913 Webster]