involuntarily

from WordNet (r) 3.0 (2006)

involuntarily
    adv 1: against your will; "he was involuntarily held against his
           will" [ant: {voluntarily}]

from The Collaborative International Dictionary of English v.0.48

Involuntarily \In*vol"un*ta*ri*ly\, adv. [From {Involuntary}.]
   In an involuntary manner; not voluntarily; not intentionally
   or willingly.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

30 Moby Thesaurus words for "involuntarily":
      automatically, blindly, by reflex, carelessly, compulsively,
      heedlessly, inadvertently, inconsiderately, indeliberately,
      instinctively, malgre soi, mechanically, reflexively,
      thoughtlessly, unadvisedly, uncalculatedly, unconsciously,
      under compulsion, undesignedly, unexpectedly, unintentionally,
      unpremeditatedly, unreasoningly, unthinkingly, unthoughtfully,
      unwillingly, unwittingly, without design, without premeditation,
      without willing