Nemeses

Her lack of self-control when it came to spending was her financial nemeses.

The nemeses of clean energy are the fossil fuel industries that have long dominated the world's energy production.

The thief's greed eventually became his nemeses and led to his capture.

The computer virus was the nemeses of the company's entire network.

The nemeses of computer hackers are the cybersecurity experts who work to keep their networks safe.

The two rival gangs were nemeses in the crime world.