Nemeses

The patient's nemeses, the side effects of the medication, made it difficult for her to manage her illness.

Her addiction to smoking proved to be her nemeses.

Lack of exercise and a healthy diet were her nemeses that resulted in weight gain.

Despite her best efforts, Jane's nemeses, her chronic health issues, continued to impede her progress.

His desire for sweets was his nemeses in his diet.

For those trying to lose weight, junk food can be their nemeses, tempting them to abandon their diet.

For people with pollen allergies, springtime can be a time of sneezing and itchy eyes as their nemeses, the pollens, are in the air.