an action or an event which causes something to end or fail.

This renewed outbreak of fighting has been seen as a death blow to any chance for peace. (usually + to)

The scandal dealt a death blow to (= ended) his political ambitions.

• go through fire and water
• go through hell
• go through hoops
• go through like a dose of salts
• go through like a hot knife through butter
• go through like a knife through butter
• go through someone like a dose of salts
• go through something like a dose of salts
• go through something like a hot knife through butter
• go through something like a knife through butter
• go through the floor
• go through the mill
• go through the motions
• go through the roof
• go through the wringer
• go through with
• go through with something
• got it bad
• Got it in one!
• go to any lengths
• go to any lengths to do something
• go to bat for
• go to bat for someone
• go to bat for something
• go to bed with