γέεννα
From LSJ
κακοὶ μάρτυρες ἀνθρώποισιν ὀφθαλμοὶ καὶ ὦτα βαρβάρους ψυχὰς ἐχόντων → eyes and ears are poor witnesses for men if their souls do not understand the language (Heraclitus Phil.: Fr. B 107; Testimonia: Fragment 16, line 6)
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.