γέεννα
From LSJ
ὡς μήτε τὰ γενόμενα ἐξ ἀνθρώπων τῷ χρόνῳ ἐξίτηλα γένηται → in order that so the memory of the past may not be blotted out from among men by time
English (LSJ)
ης, ἡ, Hebr.
A gé-hinnóm, the valley of Hinnom, which represented the place of future punishment, Ev.Matt.5.22, al.
German (Pape)
[Seite 478] ἡ, hebräisches W., die Hölle, N. T.