H7231 רָבַב (raw-bab')

KJV renderings: increase, be many(-ifold), be more, multiply, ten thousands.
Strong's definition: properly, to cast together , i.e. increase, especially in number; to multiply by the myriad
Derivation: a primitive root; (compare H7241 (רָבִיב)); also as denominative from H7233 (רְבָבָה);

From James Strong's public-domain dictionaries (H), JSON edition by OpenScriptures (CC-BY-SA). Every dotted-underline word in the text links here.