rumble

1 rumble /ˈrʌmbəl/ verb
rumbles; rumbled; rumbling
1 rumble
/ˈrʌmbəl/
verb
rumbles; rumbled; rumbling
Britannica Dictionary definition of RUMBLE
1 
[no object] : to make a low, heavy, continuous sound or series of sounds
2 
always followed by an adverb or preposition, [no object] : to move along with a low, heavy, continuous sound
3 
[no object] US, informal + old-fashioned : to fight especially in the street
4 
[+ object] British, informal : to reveal or discover the true character of (someone)

rumble on

[phrasal verb]
: to continue for a long period of time
2 rumble /ˈrʌmbəl/ noun
plural rumbles
2 rumble
/ˈrʌmbəl/
noun
plural rumbles
Britannica Dictionary definition of RUMBLE
[count]
1 
: a low, heavy sound or series of sounds
2 
US, informal + old-fashioned : a fight in the street especially between gangs