/ˈbreɪ.zən/
made of or covered in brass (= a bright yellow metal):
What lies beyond the brazen gates of the palace?

(disapproving) open and without shame, usually about sth that people find shocking 厚颜无耻的 SYN shameless
She had become brazen about the whole affair.
她对整件事已经不感到羞耻了。
his brazen admission that he was cheating
他恬不知耻地承认自己作