scruples

I had no scruples about eavesdropping.

我对偷听没有丝毫顾忌。

The villain made no scruple of committing murder.

那恶棍眨眼。

A man who could make so vile a pun would not scruple to pick a pocket.

一个能说出如此恶劣双关语的，是会对偷窃钱包感到安的。

He acted wrongly and without scruple.

他做了错事毫内疚。