Strong's G1067 — γέεννα (noun)
geenna (gheh'-en-nah) n.
1. valley of (the son of) Hinnom
2. ge-henna (or Ge-Hinnom), a valley of Jerusalem,
{used (figuratively) as a name for the place (or state) of everlasting punishment}
[of Hebrew origin (H1516 and H2011)]
KJV: hell 
Root(s): H1516, H2011 
Hebrew root: גַּיא גַּי
Occurrences: 12