groan

我听见门后传来他的呻吟声。

I could hear his ___groan from behind the door.

随着一声绝望的呻吟，他瘫倒在沙发上。

With a desperate ___groan, he collapsed onto the sofa.

听到这个坏消息时，她不由得发出一声呻吟。

A ___groan escaped her lips when she heard the bad news.