Nemeses

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

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

The rainy weather has been a nemeses to the outdoor wedding plans.

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

Her procrastination was her nemeses when it came to completing projects.