If you describe a person or their behaviour as brazen, you mean that they are very bold and do not care what other people think about them or their behaviour.
例句
They're quite brazen about their bisexuality, it doesn't worry them.他们在自己的双性恋问题上无所顾忌,毫不为意。
英汉词典释义
adv.
厚脸皮地;肆无忌惮地
How dare he distort the facts so brazenly!他怎么敢如此肆无忌惮地歪曲事实!