Nemeses

The detective knew that the elusive criminal was his nemeses, always managing to evade capture.

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

The roadrunner and coyote were nemeses in the cartoon.

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

The nemeses of clean energy are the fossil fuel industries that have long dominated the world's energy production.

The cat and mouse were nemeses in the classic cartoon.

The nemeses of the criminal underworld are the police officers who tirelessly work to bring them to justice.