"audacious" in the adjective sense
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"
Source: WordNet® (An amazing lexical database of English)
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