Meanings
no pluralnetherworld, underworld, Hades, Sheol (kind of afterlife that is neither heaven nor hell)
no plural · specificallythe place that the dead went to before the resurrection of Christ, “hell” as in harrowing of hell
Gekreuzigt, gestorben und begraben, hinabgestiegen in das Reich des Todes, am dritten Tage auferstanden von den Toten.Crucified, dead and buried, he descended into hell, on the third day he rose again from the dead. (Apostles' Creed)