What is Worry?
Worry is (noun) 1. something which makes you anxious Go on holiday and try to forget your worries. 2. the state of being anxious She is a great source of worry for her family. (verb) 1. to be anxious because of something He’s worrying about his driving test. I worry when the children stay out late. Don’t worry, I’ll be back on time. She’s always pale and that worries me. 2. (of animals) to shake and tear with the teeth to worry sheep to chase and attack sheep
source: Easier English, Student Dictionary Upper Intermediate Level