Cách sử dụng
Grumble means to complain or express dissatisfaction or annoyance about something, often in a low, grumpy voice. It can be used in situations where someone is dissatisfied with something but doesn't necessarily want to confront or solve the problem. For example, "My dad always grumbles about having to mow the lawn every weekend" or "She kept grumbling about the long lines at the grocery store." It's important to note that grumbling can be seen as a negative behavior and it is often better to address the problem directly instead of just complaining about it.