רָבַב (rābab) is
a Hebrew verb
meaning be many. It appears
13 times
in 5 books of the Hebrew Bible
(Strong's H7231).
Also rendered
to multiply
Same Hebrew root (TWOT 2099)
Range of meaning (TWOT 2099)be, become, many, much; cast together, increase, multiply by the myriad; be manifold, be more, multiply, ten thousands
Full entry: Brown-Driver-Briggs and Strong's
רָבַבverb: be, become, many, much
be or become, many, much
Strong's H7231רָבַב: properly, to cast together, i.e. increase, especially in number; to multiply by the myriad KJV:increase, be many(-ifold), be more, multiply, ten thousands.
Meanings: Brown-Driver-Briggs (1906) and Strong's Hebrew Dictionary (1890), public domain, via the Open Scriptures Hebrew Bible Project (CC BY 4.0). TWOT numbers for reference only.