Grumbling is a way of expressing dissatisfaction or annoyance, often through low, muttering sounds. People might grumble when they are unhappy about something, like a long wait in line or a difficult task at work. It’s a form of communication that shows frustration without necessarily being loud or confrontational. When someone grumbles, they might be seeking sympathy or simply venting their feelings. For example, a student might grumble about too much homework, while a parent might grumble about household chores. Although it can be a way to release tension, constant grumbling can also create a negative atmosphere.