audacious

invulnerable to fear or intimidation

• “audacious explorers”
• “fearless reporters and photographers”
• “intrepid pioneers”

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

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”