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.