Strong's G5020 — ταρταρόω (verb)
tartaroo (tar-tar-oh'-o) v.
1. to incarcerate in the Abyss "Tatarus" to await final judgement and eternal torment
[from Tartarus (the deepest dungeon of Hades, known as the Abyss)]
KJV: cast down to hell 
Occurrences: 1