Cách sử dụng
The expression "worry at" means to be anxious and concerned about something. It is often used in situations where you are continually thinking about a problem or a situation that is bothering you. For example, if you have a big test coming up, you might "worry at" it by constantly thinking about it and feeling nervous. You can also "worry at" a physical object, such as a loose button on your shirt, by continually fidgeting with it or checking to see if it is secure. The expression is commonly used in informal situations and can be used to describe any situation where you are feeling anxious or uneasy.