audacious in WordNet English dictionary

1. 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"
   audacious  daring  venturesome  venturous 
   
2. invulnerable to fear or intimidation
   "audacious explorers"; "fearless reporters and photographers"; "intrepid pioneers"
   audacious  brave  dauntless  fearless  hardy  intrepid  unfearing 
   
3. unrestrained by convention or propriety
   "an audacious trick to pull"; "a barefaced hypocrite"; "the most bodacious display of tourism this side of Anaheim"- Los Angeles Times; "bald-faced lies"; "brazen arrogance"; "the modern world with its quick material successes and insolent belief in the boundless possibilities of progress"- Bertrand Russell
   audacious  barefaced  bodacious  bald-faced  brassy  brazen  brazen-faced  insolent