" undauntable "

1: feeling or displaying no fear by temperament;

  * e.g., " ... the undauntable adventurers who crossed the trackless wilderness in search of El Dorado "

•  Synonyms : 

•  bold,

•  brave,

•  courageous,

•  dauntless,

•  doughty,

•  fearless,

•  gallant,

•  greathearted,

•  gutsy,

•  gutty,

•  heroic,

•  intrepid,

•  lionhearted,

•  manful,

•  stalwart,

•  stout,

•  stouthearted,

•  undaunted,

•  valiant,

•  valorous

•  Antonyms : 

•  chicken,

•  chickenhearted,

•  chicken-livered,

•  coward,

•  cowardly,

•  craven,

•  dastardly,

•  fainthearted,

•  fearful,

•  gutless,

•  lily-livered,

•  milk-livered,

•  nerveless,

•  poltroon,

•  poor-spirited,

•  pusillanimous,

•  spineless,

•  spiritless,

•  timorous,

•  uncourageous,

•  ungallant,

•  unheroic,

•  weakhearted,

•  yellow