B1
a problem that makes you feel anxious
Dictionary examples:
The student's biggest worry was forgetting how to read during the exam. (0.0)
The chef's main worry was that his food might taste too delicious. (0.0)
His constant worry was that his jokes might be too funny. (0.0)
health/financial worries (24.9)
Keeping warm in the winter is a major worry for many old people. (38.2)