動詞 brazen:

1. face with defiance or impudence

形容詞 brazen:

1. unrestrained by convention or propriety- Bertrand Russell
   同義詞：audacious, barefaced, bodacious, bald-faced, brassy, brazen-faced, insolent
2. made of or resembling brass (as in color or hardness)

1. Some people prefer to brazen a thing out rather than admit defeat.
   有的人不愿承認失敗，而是寧肯厚著臉皮干下去。
2. You brazen hussy!
   你這個不要臉的婊子！
3. It was brazen of him to say so!
   他這樣說真是無恥！
4. He was startled by the brazen notes of the horns.
   喇叭洪亮的聲音把他嚇了一跳。

bra.zen

adj.（形容詞）
Marked by flagrant and insolent audacity.See Synonyms at shameless
厚顏無恥的參見 shameless
Having a loud, usually harsh, resonant sound.
破鑼嗓子：發(fā)出大聲，通常是較粗糙洪亮的聲音的
Made of brass.
黃銅制的
Resembling brass, as in color or strength.
類似黃銅的：在顏色或性能上類似黃銅的
v.tr.（及物動詞）
bra.zened,bra.zen.ing,bra.zens
To face or undergo with bold self-assurance:
大膽自信地去面對或從事：
例句：
brazened out the crisis.
沉著面對危機

來源：
Middle English brasen [made of brass]
中古英語 brasen [黃銅制的]
from Old English brôsen
源自 古英語 brôsen
from brôs [brass]
源自 brôs [黃銅]

【引伸】
bra.zenly
adv.（副詞）
bra.zenness
n.（名詞）