Nemeses

The farmer's nemeses were the locusts that ate his crops year after year.

The journalist's nemeses, the lack of reliable sources and conflicting information, made it hard for her to report the truth.

Her addiction to alcohol was one of her nemeses.

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.

Her nemeses were her anxiety and perfectionism.