By rendering Tartarus as “hell” in the bible also put a big spin on things. Biblically Tartarus had no connection with mankind, by rendering it as “hell” suddenly incorporated demons and mankind in the same place. With a little research, the idea that Tartarus is the same place as both Gehenna and the grave/Hades is complete absurdity.
Take a look at –
2 Peter 2:4 For God didn't spare the angels who sinned, but threw them down into Tartarus and delivered them to be kept in chains of darkness until judgment;
Jude 1:6 and He has kept, with eternal chains in darkness for the judgment of the great day, angels who did not keep their own position but deserted their proper dwelling.
These angels are actually only removed from God’s holy presence, not literal light; hence the description “chains of darkness.” There is no such thing as “chains of darkness” in a literal sense. What this means is that they are “bound” to this darkness. They are no longer aligned with God’s spirit. Tartarus parallels the “spiritual darkness” mankind is living in today when you put the facts about demons together. Mankind is bound to this spiritual darkness in such a way that we can’t get away from it just as demons are bound to their darkness; we have all become independent of God.
Now think about demons for a minute; we know that they are still able to move about the earth and heaven, and are able to possess people as well as animals. Angels are constantly battling amongst each other in the bible -
Then war broke out in heaven: Michael and his angels fought against the dragon. The dragon and his angels also fought, but he could not prevail, and there was no place for them in heaven any longer. So the great dragon was thrown out—the ancient serpent, who is called the Devil and Satan, the one who deceives the whole world. He was thrown to earth, and his angels with him.
Clearly since Satan and his angels will not be thrown out of heaven until the beginning of the Lord’s Day proves that Satan and his fallen angels were able to move about in heaven for a long time after the flood. So they are not literally in chains down in a dark pit.
Paul also indicated that demons were still in heaven during his day –
For our battle is not against flesh and blood, but … against the spiritual forces of evil in the heavens.
Also refer to Job 1:6-7, Daniel 10:13, and Judges 5:20
It is stated in the bible that the Heavens have to be cleansed of sin before the Earth can be, therefore the demons were allowed to move about in Heaven for quite some time after these writings. Tartarus cannot be a specific place like the grave, or even hell, where demons would be confined.
These sinful angels whom Jehovah put into Tartarus are the spirits Jesus made a proclamation to in 1 Peter 3:18-20 once Jehovah resurrected him to spirit form after being dead for three days –
For Christ also suffered for sins once for all, the righteous for the unrighteous, that He might bring you to God, after being put to death in the fleshly realm but made alive in the spiritual realm. In that state He also went and made a proclamation to the spirits in prison who in the past were disobedient, “…”