Focus on the pronunciation of rumble
English definition of “rumble”
/ˈrʌm·bəl/ v [I]
› to make a continuous, low sound, or to move slowly while making such a sound: My stomach is rumbling. The trucks rumbled across the field. rumble
/ˈrʌm·bəl/ n [C usually sing] › We could hear the rumble of distant thunder.