" faintheartedness "

1: lack of willingness to assert oneself and take risks;

  * e.g., " ... his faintheartedness got the better of him, and he backed off from the ski trail intended for experts "

•  Synonyms : 

•  timidity,

•  timidness,

•  timorousness

•  Antonyms : 

•  audaciousness,

•  audacity,

•  boldness,

•  cojones,

•  guts,

•  nerve

1: easily frightened;

  * e.g., " ... the sport of river rafting is not for those who are fainthearted "

•  Synonyms : 

•  fearful,

•  fearsome,

•  mousy,

•  scary,

•  shy,

•  skittish,

•  timid,

•  timorous,

•  tremulous

•  Antonyms : 

•  adventuresome,

•  adventurous,

•  audacious,

•  bold,

•  daring,

•  dashing,

•  gutsy,

•  hardy,

•  venturesome,

•  venturous