In Dante's Inferno, Satan is depicted with three mouths, one chewing Judas, one Brutus, and the third Cassius (traitors to benefactors, friends, and nations, respectively). But it is also one of the epithets of Nidhogg, the dragon that gnaws both the roots of the World-Tree Yggdrasill and the corpses of oathbreakers.
E.g., as Athena was wont to come in disguise to goad mortals into action, as she encouraged Telemachus to depart his home in Ithaca in search of his long-lost father, Odysseus.
"Navel" in Greek. In Greek myth, the omphalos was the center of the world as determined by Zeus sending two birds to fly in separate directions until they met again. The word can also mean a place that feels like the center of the universe because of its power.
