shameless or impudent

brazen presumption.

made of brass.

like brass, as in sound, color, or strength.

to make brazen or bold. ?

brazen out or through, to face boldly or shamelessly

He prefers to brazen it out rather than admit defeat.

adjective

humble , meek , shamed , shamefaced , shy , timid

adjective

audacious , barefaced , blatant , bold , brassy , cheeky , cocky , contumelious , defiant , flashy , flip , forward , gritty , gutsy , hotshot , immodest , impertinent , impudent , indecent , insolent , loud , meretricious , nervy , overbold , pert , saucy , shameless , smart-alecky , smart-ass , spunky , tawdry , unabashed , unblushing , assuming , assumptive , boldfaced , brash , familiar , malapert , overconfident , presuming , presumptuous , pushy , sassy , smart , bald-faced , brazenfaced , arrogant , brass , callous , chintzy , clangorous , crass , daring , defying , extreme , gaudy , hard , hubristic , intense , metallic , resolute , unashamed , unscrupulous