Commentators explain that God bringing Tyre down to "the pit" is a powerful metaphor for its complete and final destruction. By comparing Tyre to "the people of old time" in desolate places, the prophecy emphasizes that this proud city-state will be utterly forgotten, joining the realm of the dead. This isn't a literal description of the afterlife's location, but a vivid image of irreversible ruin for those who oppose God.