Nemeses

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

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.

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

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