grimly

from WordNet (r) 3.0 (2006)

grimly
    adv 1: in a grim implacable manner; "he was grimly satisfied"

from The Collaborative International Dictionary of English v.0.48

Grimly \Grim"ly\, a.
   Grim; hideous; stern. [R.]
   [1913 Webster]

         In glided Margaret's grimly ghost,
         And stood at William's feet.             --D. Mallet.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Grimly \Grim"ly\, adv.
   In a grim manner; fiercely. --Shak.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

78 Moby Thesaurus words for "grimly":
      adamantly, appallingly, austerely, banefully, bleakly, decorously,
      demurely, direly, dismally, dourly, dreadfully, drearily,
      earnestly, firmly, formally, frowningly, funereally, gloomily,
      gloweringly, glumly, gravely, grumly, harshly, heavily, hideously,
      horribly, horridly, immovably, immutably, implacably, inclemently,
      inexorably, inflexibly, intransigently, irreconcilably, loweringly,
      moodily, mopingly, morosely, mumpishly, obdurately, relentlessly,
      rigidly, rigorously, roughly, ruggedly, sadly, scowlingly,
      sedately, seriously, severely, shockingly, sober-mindedly, soberly,
      sobersidedly, solemnly, somberly, sombrously, staidly, sternly,
      stiffly, strictly, stringently, sulkily, sullenly, surlily,
      terribly, thoughtfully, toughly, tragically, unalterably,
      unbendingly, unchangeably, uncompromisingly, unregenerately,
      unrelentingly, unsparingly, unyieldingly