" foolhardily "

1: as in recklessly, wildly;

•  Synonyms : 

•  brashly,

•  brazenly,

•  heedlessly,

•  hotheadedly,

•  impetuously,

•  imprudently,

•  impulsively,

•  incautiously,

•  overconfidently,

•  rashly,

•  recklessly,

•  thoughtlessly,

•  wildly,

•  crazily,

•  foolishly,

•  insanely,

•  hastily,

•  precipitately,

•  self-confidently,

•  adventurously,

•  audaciously,

•  daringly,

•  hardily,

•  venturesomely,

•  venturously,

•  spiritedly,

•  spunkily,

•  stoutly,

•  determinedly,

•  firmly,

•  gamely,

•  grittily,

•  pluckily,

•  resolutely,

•  boldly,

•  bravely,

•  courageously,

•  dauntlessly,

•  doughtily,

•  fearlessly,

•  gallantly,

•  gutsily,

•  heroically,

•  intrepidly,

•  manfully,

•  stalwartly,

•  stoutheartedly,

•  valiantly,

•  valorously

•  Antonyms : 

•  cowardly,

•  cravenly,

•  fearfully,

•  pusillanimously,

•  spinelessly,

•  spiritlessly,

•  timorously,

•  diffidently,

•  mousily,

•  shyly,

•  skittishly,

•  timidly,

•  anxiously,

•  apprehensively,

•  nervously,

•  carefully,

•  cautiously,

•  heedfully,

•  prudently

1: foolishly adventurous or bold;

  * e.g., " ... hikers who were foolhardy enough to remain on the summit during a thunderstorm "

•  Synonyms : 

•  audacious,

•  brash,

•  daredevil,

•  madcap,

•  overbold,

•  overconfident,

•  reckless,

•  temerarious

•  Antonyms : 

•  careful,

•  cautious,

•  circumspect,

•  guarded,

•  heedful,

•  prudent,

•  safe,

•  wary

2: having or showing a lack of concern for the consequences of one's actions;

  * e.g., " ... it's foolhardy to go hiking during late fall without warm clothes "

•  Synonyms : 

•  daredevil,

•  devil-may-care,

•  harum-scarum,

•  hell-for-leather,

•  irresponsible,

•  kamikaze,

•  reckless

•  Antonyms : 

•  responsible