From rabah; properly, increasing; as noun, greatness, or (adverbially) greatly -- great, increase.
see HEBREW rabah
H4766. marbeh
מַרְבֶּה noun [masculine]
1abundance; — absolute ׳מ Isaiah 33:23, as adverb, in abundance.
2 increase (?), construct לְםַרְבֵּה (sic) Isaiah 9:6 for the increase of the dominion (take לם as dittograph of foregoing, and read ᵐ5 רַבָּה, Gr Che Kit BuhlLex Marti; Du לְמַרְבֵךְ, in view of following לְשָׂלוֺם).