tartaroó: to cast into hell
Original Word: ταρταρόω
Part of Speech: Verb
Transliteration: tartaroó
Phonetic Spelling: (tar-tar-o'-o)
Definition: to cast into hell
Usage: I thrust down to Tartarus or Gehenna.
Jewish apocalyptic literature described Tártaros as the place where fallen angels were sent as the lowest, darkest, gloomiest hell, the deepest pit and the most terrible place of torture and suffering. This term came later to refer to the region of the lost dead. It is found only once in the NT in its verbal form in this verse.
https://www.preceptaustin.org/2_peter_24-11#2:4
I know that in Bibles at 2 Peter 2:4 it says that these fallen angels were cast down to tartarus. But when Peter wrote that he didn't mean that these fallen angels were cast into the pagan mythological Tartarus(that is, an underground prison and place of darkness for the lesser gods). This Tartarus doesn't and hasn't ever really existed, just as those Greek gods, Zeus, Ares, Apollo, etc along with the Titans don't and have ever really existed. Peter was just saying that these fallen angels were abased by God from their heavenly place and privileges and were delivered over to a condition of deepest mental or spiritual darkness respecting God's purposes. This darkness also marks these fallen angels own eventuality, which from the scriptures show is everlasting destruction along with their ruler Satan. So these angels being thrown in Tartarus doesn't mean that these angels are in a actual real prison but instead denotes the lowest abasement for those rebellious or fallen angels.