Nemeses

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

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

Her mother was her nemeses when it came to fashion choices.

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

The homeowner's nemeses, termites, caused extensive damage to the structure of their house.