tartarus

prop. n. [ L., from Gr. Ta`rtaros. ] (Class. Myth.) The infernal regions, described in the Iliad as situated as far below Hades as heaven is above the earth, and by later writers as the place of punishment for the spirits of the wicked. By the later poets, also, the name is often used synonymously with Hades, or the Lower World in general. [ 1913 Webster ]