1. (

• audacious ,
• brave ,
• dauntless ,
• fearless ,
• hardy ,
• intrepid ,
• unfearing

) invulnerable to fear or intimidation; "audacious explorers"; "fearless reporters and photographers"; "intrepid pioneers" ;

2. (

• audacious ,
• barefaced ,
• bodacious ,
• bald-faced ,
• brassy ,
• brazen ,
• brazen-faced ,
• insolent

) 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 ;

3. (

• audacious ,
• daring ,
• venturesome ,
• venturous

) 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" ;