to sound the death knell
[sound|toll|ring] the death-knellto sound the death knell
01
***to cause or signal the impending end or ruin of something, especially a business, organization, or activity. Refers to the sound of a bell ringing (the knell) from a church to indicate that someone has die.
أمثلة
Many people thought that the Internet would toll the death knell for newspapers.
