1. invulnerable to fear or intimidation;

   "audacious explorers"
   "fearless reporters and photographers"
   "intrepid pioneers"
   

2. unrestrained by convention or propriety;

   "an audacious trick to pull"
   "a barefaced hypocrite"
   "the most bodacious display of tourism this side of Anaheim"
   "bald-faced lies"
   "brazen arrogance"
   "the modern world with its quick material successes and insolent belief in the boundless possibilities of progress"
   

3. disposed to venture or take risks;

   "audacious visions of the total conquest of space"
   "an audacious interpretation of two Jacobean dramas"
   "the most daring of contemporary fiction writers"
   "a venturesome investor"
   "a venturous spirit"
   

1.敢于冒险的；大胆的
Someone who isaudacious takes risks in order to achieve something.

e.g. ...anaudacious plan to win the presidency.
为当选总统而制订的大胆计划

1. 大胆的,有冒险精神的：aspiring 有志气的,有抱负的 |audacious 大胆的,有冒险精神的 | capable 有能力的,有才能的

2. audacious的反义词

2. 大胆创新的：value-added tax 增值税 |audacious 大胆创新的 | demonstration lecture 示范课

3. 大胆的：assiduous#勤勉的 |audacious#大胆的 | avid#贪婪的