death knell Kami凶讯神
sound the death knell敲响丧钟
the Death Knell丧钟
For whom death knell丧钟为谁鸣
Rung Death Knell穷途
It rings the death knell终章
sound the death knell detail敲响丧钟
N-SING（单数型名词） If you say that something sounds the death knell for a particular person or thing, you mean it will cause that person or thing to fail, end, or cease to exist. 导致终结的原因 [usu 'the' N 'for/of' n]
The tax increase sounded the death knell for the business.
税收的增长预示着这项生意的终结。