" heedlessly "

1: as in recklessly, wantonly;

•  Synonyms : 

•  hotheadedly,

•  recklessly,

•  wantonly,

•  agitatedly,

•  confusedly,

•  crazily,

•  desperately,

•  feverishly,

•  haywire,

•  skittishly,

•  uncontrollably,

•  chaotically,

•  riotously,

•  tumultuously,

•  turbulently,

•  amok,

•  berserk,

•  berserkly,

•  frantically,

•  frenetically,

•  frenziedly,

•  harum-scarum,

•  hectically,

•  helter-skelter,

•  madly,

•  pell-mell,

•  wild,

•  wildly,

•  aimlessly,

•  haphazard,

•  haphazardly,

•  hit or miss,

•  topsy-turvy

•  Antonyms : 

•  calmly,

•  collectedly,

•  composedly,

•  coolly,

•  imperturbably,

•  peacefully,

•  placidly,

•  self-composedly,

•  self-possessedly,

•  serenely,

•  unconcernedly,

•  meekly,

•  mildly,

•  passively,

•  tamely,

•  methodically,

•  orderly,

•  systematically

1: not paying or showing close attention especially for the purpose of avoiding trouble;

  * e.g., " ... heedless drivers who back out of parking spaces without looking "

•  Synonyms : 

•  careless,

•  incautious,

•  mindless,

•  unguarded,

•  unsafe,

•  unwary

•  Antonyms : 

•  alert,

•  cautious,

•  circumspect,

•  gingerly,

•  guarded,

•  heedful,

•  safe,

•  wary