compunction

n.良心的责备；后悔；悔恨

He had lied to her without compunction. 他向她撒了谎却毫无愧疚。

She kept me waiting without the slightest compunction. 她使我久候而丝毫没有歉意。

I felt some compunction at having kept her waiting. 我有点后悔要她等我。