The literal meaning of “Hinnom” = “lamentation”

The Valley of Lamentation

The place of Tophet (drums beating) as they burn their sons and daughter in the fire.

When people destroy their future, their future will destroy them.

• HELL ON EARTH – The Washington Post
  “Hinnom’s ghastly child sacrifice was halted only in the 7th century BC when Josiah overran the valley and desecrated its altars with bones. Eventually, part of Gei Ben Hinnom became a dump, with constant day and night burning of trash fires emitting a sulfurous stench. The Washington Post Aug 29, 1999
  Some cannot help but hear the tormented screams of babies being burned alive, the macabre incantations of the idolatrous in gruesome celebration, the agonized cries of helpless victims, and so many echoes of death and dis-consolation that dwell here so pervasively not even the centuries can silence them.”
  The valley was named for an alien nonsemitic family, the Hinnom clan that predated the First Temple period a thousand years before the Christian era, and established the locale as a place of abomination. Gei Ben Hinnom became Ge Hinnom (Valley of Hinnom), and eventually Gehenna in English or Gehennem in Arabic and Hebrew.
  Those who walked through the biblical Valley of the Shadow of Death walked here. Hellish images of unending torture and fire as punishment for a life of evil owe much to this hideous acreage, just a short walk from the path of righteousness that leads to the Temple Mount.
  
  Hellish Sacrifice
  
  Tophet altars are said to be named for the noisy drum that those devoted to their idol Molech would beat to drown out the ghastly cries of children immolated in sacrifice in front of their own willing parents. Mothers and fathers not only witnessed the sacrifice, but glorified the act.

The first detailed account of this practice occurring by the Carthaginians comes from Cleitarchus, an early third-century BC historian of Alexander the Great, who is quoted by a scholiast as saying:

Phoenicians, and above all Carthaginians, worship Kronos; if they wish to achieve something big, they devote a child of theirs, and in the case of success, sacrifice it to the god. There is a bronze statue of Kronos among them, which stands upright with open arms and palms of its hands facing upwards above a bronze brazier on which the child is burnt. When the flames reach the body, the victim’s limbs stiffen and the tense mouth almost seems like it is laughing until, with a final spasm, the child falls in the brazier.
Cleitarchus FGrH no. 137, F 9

The Spirit of Demons never die – they just return when there are new opportunities. They change words and definitions making it look clean and pretty. They silence the screaming, then before you know it, they are back in full force.