Cách sử dụng
The expression "gnaw at" means to bother or worry someone persistently. It is often used to describe a feeling of discomfort or anxiety that doesn't go away. For example, if you have a lot of work to do but can't concentrate, the thought of all the work may gnaw at you. You can use this expression to describe physical discomfort too, such as a toothache that keeps bothering you even after you take painkillers. In general, "gnaw at" is used to describe something that causes a persistent, nagging feeling of unease or discomfort.