rumble
verb (used without object)
to make a deep, heavy, somewhat muffled, continuous sound, as thunder.
Used to describe a continuous action that will progress up until a designated point of completion in the future.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
By the time Terry's hearing takes place the case will have been rumbling on for 11 months, but Powar said he had no wish to see such cases resolved speedily at the expense of justice.
From The Guardian ● Aug. 15, 2012