What is Gehinnom?

Gehinnom is the name given to Hell in the Rabbinic literature. The name was borrowed from that of a real valley (see Joshua 15:2,8 and 18:16; 2 Kings 23:10; 2 Chron.28:3 and 33:6; Jeremiah 7:31-32 and 19:2,6; Nehemiah 11:30) where burnings took place. See also Isaiah 30:33; Jeremiah 19:11-13; Job 17:6. Punishment in Gehinnom lasts only for up to 12 months, except for certain major sinners. Isaiah 66:24 must be referring to it when he speaks of the fire that is not extinguished. Ask a follow-up question