Nemeses

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

His fear of public speaking was his nemeses when it came to advancing his career.

Her fear of public speaking was one of her nemeses in her career advancement.

The nemeses of the company's expansion plans were the strict regulations imposed by the government.

The two companies were nemeses in the tech industry.

The entrepreneur's nemeses were the competitors who always seemed to have the upper hand.

The economic recession proved to be the nemeses of many small businesses.

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