Ra-Kef-Be: To ride, embark, mount, be carried, go on board of a ship, voyage on (the sea), walk on (a road), commit (a fault). Rakbun - caravan. Rukban (pl. of rakib) - one who rides, mounted. Rikab - camels. Rakub - use of a beast for riding. Mutarakibun - laying in heaps, ridden on one another, close growing, cluster over clustered, layer upon layer. Tarkabunna - to pass on, rise, ascend.