" thoughtlessly "

1: as in recklessly, impulsively;

•  Synonyms : 

•  headfirst,

•  headily,

•  hotheadedly,

•  impatiently,

•  impetuously,

•  impulsively,

•  recklessly,

•  cursorily,

•  hastily,

•  headlong,

•  hotfoot,

•  hurriedly,

•  pell-mell,

•  precipitately,

•  precipitously,

•  rashly,

•  automatically,

•  glancingly,

•  haphazardly,

•  impromptu,

•  spontaneously,

•  abruptly,

•  suddenly,

•  offhand,

•  offhandedly

•  Antonyms : 

•  deliberately,

•  studiedly,

•  calculatingly,

•  circumspectly,

•  designedly,

•  falteringly,

•  haltingly,

•  hesitantly,

•  hesitatingly,

•  tentatively,

•  leisurely,

•  slowly

2: as in inconsiderately, insensitively;

•  Synonyms : 

•  ill-naturedly,

•  inconsiderately,

•  insensitively,

•  disagreeably,

•  ill,

•  ungraciously,

•  unkindly,

•  diabolically,

•  fiendishly,

•  balefully,

•  caddishly,

•  callously,

•  cruelly,

•  evil-mindedly,

•  felly,

•  hard-heartedly,

•  heartlessly,

•  inhumanely,

•  kindlessly,

•  mercilessly,

•  pitilessly,

•  ruthlessly,

•  soullessly,

•  unfeelingly,

•  misanthropically,

•  bitterly,

•  enviously,

•  jealously,

•  resentfully,

•  acrimoniously,

•  antagonistically,

•  caustically,

•  envyingly,

•  hostilely,

•  invidiously,

•  obnoxiously,

•  rancorously,

•  venomously,

•  vindictively,

•  vituperatively,

•  contemptuously,

•  deprecatingly,

•  disdainfully,

•  scornfully,

•  bitchily,

•  cattily,

•  despitefully,

•  hatefully,

•  malevolently,

•  maliciously,

•  malignantly,

•  meanly,

•  nastily,

•  spitefully,

•  viciously,

•  villainously,

•  virulently,

•  wickedly

•  Antonyms : 

•  benevolently,

•  benignantly,

•  good-heartedly,

•  kindheartedly,

•  kindly,

•  affably,

•  agreeably,

•  amiably,

•  cordially,

•  genially,

•  good-humoredly,

•  good-naturedly,

•  graciously,

•  nicely,

•  pleasantly,

•  altruistically,

•  humanely,

•  considerately,

•  feelingly,

•  lovingly,

•  mercifully,

•  sensitively,

•  softheartedly,

•  solicitously,

•  soulfully,

•  thoughtfully,

•  compassionately,

•  sympathetically,

•  angelically,

•  divinely,

•  gently,

•  sweetly,

•  tenderly

1: showing a lack of manners or consideration for others;

  * e.g., " ... always making thoughtless comments that hurt other people's feelings "

•  Synonyms : 

•  discourteous,

•  disrespectful,

•  ill-bred,

•  ill-mannered,

•  impertinent,

•  impolite,

•  inconsiderate,

•  rude,

•  uncalled-for,

•  uncivil,

•  ungracious,

•  unhandsome,

•  unmannered,

•  unmannerly

•  Antonyms : 

•  civil,

•  considerate,

•  courteous,

•  genteel,

•  gracious,

•  mannerly,

•  polite,

•  thoughtful,

•  well-bred