intransitive verb
Definition: To feel anxious or troubled about something; to be concerned.
Example: She tends to worry about her exams even when she studies hard.
noun
Definition: A feeling of concern or anxiety about something that may happen.
Example: Her biggest worry is whether she will pass the exam.
transitive verb
Definition: To make someone feel anxious or troubled about something.
Example: She tends to worry about her exams even when she is well-prepared.