Nemeses

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

The rising sea levels and extreme weather conditions are the nemeses of climate change activists.

The hero and villain in the action movie were nemeses.

The traveler's nemeses, lost luggage and delayed flights, ruined her vacation.

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