Nemeses

Her lack of self-control when it came to spending was her financial nemeses.

The thief's greed eventually became his nemeses and led to his capture.

Poor time management was one of his nemeses that hindered his productivity.

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

The detective and his nemeses engaged in a cat-and-mouse game that lasted for years.

The nemeses of the detective were always trying to outsmart him.

The two rival gangs were nemeses in the crime world.

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