Nemeses

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

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.

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.