Nemeses

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

The hero's journey often involved facing and overcoming the challenges posed by the nemeses.

The hero's tragic fate was sealed when he incurred the wrath of the nemeses.

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

The hero's victory over the nemeses was seen as a triumph of mortal will over divine power.

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

Their nemeses were their fear of failure and lack of self-confidence.