担忧 (dān yōu): 걱정하다.

The son was traveling abroad alone for the first time; although his mother said it was fine, she was constantly worried about his safety.

The doctor carefully reviewed the test report and told the patient not to worry, as all indicators were within the normal range.

Upon learning that the company would lay off staff next month, the colleagues were all very worried about whether they would lose their jobs.

After several consecutive weeks of drought without rain, the farmers began to worry that this year's harvest would drop significantly.

She was worried that her elderly father was home alone with no one to care for him, so she decided to move back to live with him.