If you describe someone as shameless, you mean that they should be ashamed of their behaviour, which is unacceptable to other people. 无耻的
adjective [原级] 无耻的，不要脸的
The activities that may have got the benefit of the doubt in the bubble years now look like shameless envelope-pushing. 这些活动在经济泡沫时期也许能无罪推定，但现在看来，更像是无耻的挑战原则底线。
后缀: less
【adjective】 表示缺乏或没有某种特性 - indicating the absence or lack of a particular quality
原词: shameless
是通过后缀 【less】 构成的派生词
