"Worry" is a noun and verb that refers to the state of being anxious or concerned about something. As a noun, it typically implies a feeling of unease or distress over a potential problem or situation that may occur in the future. As a verb, it means to give oneself anxious or troubled thoughts about something.
Here are some examples of how "worry" can be used:
As a noun:
She couldn't sleep because she was worrying about her upcoming exam.
Worrying about money can be very stressful.
As a verb:
Don't worry; it's not going to be as bad as you think.
He worries too much about his health.
"Worry" can also be used in phrases such as "worry about," "worry for," or "worry over," which all convey the idea of being concerned or anxious about something.