• noun:   a fight between rival gangs of adolescents
• noun:   a servant's seat (or luggage compartment) in the rear of a carriage
• noun:   a loud low dull continuous noise
• verb:   make a low noise
• verb:   to utter or emit low dull rumbling sounds

  Example: "He grumbled a rude response"

• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #12144)

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