顾忌

I had no scruples about eavesdropping.

偷听没有丝毫顾忌。

How could she swallow such a blatant lie?

她怎么能轻信这个无所顾忌的谎言呢？

The gambler bought off the police and thus was able to operate freely.

赌徒贿赂了警察, 于是便可以毫无顾忌赌博。

He loosened up under the liquor.

他喝了酒无所顾忌乱说起来。