Nemeses

His phobia of heights was one of his nemeses that prevented him from enjoying outdoor activities.

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

Growing up in poverty, she believed that a life of struggle was her nemeses.

The hiker's nemeses, blisters on her feet, made it difficult for her to continue on the trail.

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

He had a feeling of foreboding that the car accident he had avoided would ultimately prove to be his nemeses.

The hiker's nemeses were the difficult terrain and bad weather.

Writer's block and self-doubt were his nemeses when it came to writing.