inadvertent

inadvertent
    adj 1: happening by chance or unexpectedly or unintentionally ;
           "with an inadvertent gesture she swept the vase off the
           table"; "accidental poisoning"; "an accidental shooting"
           [syn: {accidental}, {inadvertent}]
    

Inadvertent \In`ad*vert"ent\, a. [Cf. F. inadvertant. See 2d
   {In-}, and {Advert}.]
   Not turning the mind to a matter; heedless; careless;
   negligent; inattentive.
   [1913 Webster]

         An inadvertent step may crush the snail
         That crawls at evening in the public path. --Cowper.
   -- {In`ad*vert"ent*ly}, adv.
   [1913 Webster]
    

89 Moby Thesaurus words for "inadvertent":
      arbitrary, automatic, capricious, careless, casual,
      culpably negligent, derelict, disregardant, disregardful,
      distracted, distrait, feckless, gut, heedless, ill-advised,
      ill-considered, ill-devised, inattentive, inconsiderate, incurious,
      indeliberate, indifferent, inobservant, involuntary, laissez-faire,
      lax, loose, neglectful, neglecting, negligent, noninterfering,
      nonrestrictive, off-guard, overly permissive, permissive,
      procrastinating, reasonless, reflex, reflexive, regardless,
      relaxed, remiss, scamping, skimping, slack, slighting, slurring,
      snap, spontaneous, thoughtless, unadvised, uncalculated,
      uncalculating, uncaring, uncircumspect, unconscious, unconsidered,
      undeliberate, undeliberated, undesigned, undevised, unguarded,
      unheedful, unheeding, unintended, unintentional, unmarking,
      unmeditated, unmindful, unnoticing, unnoting, unobservant,
      unobserving, unplanned, unpremeditated, unpurposed, unreasoning,
      unreflecting, unreflective, unremarking, unrigorous, unstudied,
      unthinking, unthought, unthoughtful, unwary, unwatchful, unwilled,
      wrecking