Nemeses

The city's nemeses, potholes, made for a bumpy and frustrating commute.

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

Impulsive buying was one of her nemeses that resulted in a financial crisis.

The scientist believed that time was the ultimate nemeses, always ticking away and limiting his ability to achieve his goals.

His stubbornness was one of his nemeses that often led to arguments with his loved ones.