bold and without shame.
he went about his illegal business with a brazen assurance
bold,shameless,as bold as brass,brazen-faced,forward,presumptuous,brash,immodest,unashamed,unabashed,unembarrassed,unblushing,defiant,impudent,insolent,impertinent,cheeky,pert,barefaced,blatant,flagrant,undisguised,brassy,pushy,saucy
endure an embarrassing or difficult situation by behaving with apparent confidence and lack of shame.
there was nothing to do but brazen it out
put on a bold front,put a bold face on it,be defiant,be unrepentant,be impenitent,be unashamed,be unabashed,stand one’s ground