excruciatingly

from WordNet (r) 3.0 (2006)

excruciatingly
    adv 1: in a very painful manner; "the progress was agonizingly
           slow" [syn: {agonizingly}, {excruciatingly},
           {torturously}]

from The Collaborative International Dictionary of English v.0.48

Excruciating \Ex*cru"ci*a`ting\
   Torturing; racking. "Excruciating pain." --V. Knox.
   "Excruciating fears." --Bentley -- {Ex*cru"ci*a`ting*ly},
   adv.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

59 Moby Thesaurus words for "excruciatingly":
      abominably, agonizingly, awfully, baldly, balefully, bitterly,
      blatantly, brashly, confoundedly, cruelly, damnably, deadly,
      deathly, deplorably, deucedly, distressfully, distressingly,
      dolorously, dreadfully, egregiously, excessively, exorbitantly,
      extravagantly, flagrantly, frightfully, grievously, harrowingly,
      heartbreakingly, hellishly, horribly, improperly, inexcusably,
      infernally, inordinately, intolerably, lamentably, miserably,
      nakedly, openly, painfully, pathetically, piteously, pitiably,
      ruefully, sadly, shatteringly, shockingly, something awful,
      something fierce, sorely, staggeringly, terribly, torturously,
      unashamedly, unbearably, unconscionably, unduly, unpardonably,
      woefully