From an unused root meaning probably to collect; a reservoir; by analogy, a marsh -- marish, pit.
H1360. gebe
גֶּ֫בֶא noun masculineEzekiel 47:11 cistern, pool (compare Arabic watering-trough) —
1 cistern מִגֶּ֑בֶא מַיִם Isaiah 30:14.
2 pool, marsh גְּבָיָאו Ezekiel 47:11 ("" כִּצּאֹתָ֯ו).
גבב (probably be curved, convex, elevated, Aramaic גִּבְּבָא hill; be or make hollow, dig, Arabic cut off or out, , Aramaic גֹּב, Ethiopic , Assyrian gubbu, — all = cistern; compare e.g. Assyrian gubbâni ša mê, cisterns of water, AsrbAnnals Col. viii. 102, KBii. 220; see proper name גֹּב below)