Dave Bonta's short poem starts underground. After some time in a mine, the speaker says, "our ears adjust." In the silence and darkness, hearing sharpens, and the poem pushes that idea further: the sound seems to travel "back to the marrow / bone," as if we listen with our skeleton rather than just our ears. The word "we" pulls the reader down into the mine too.
The last two lines shift into an image. The place "we now go" becomes "a disconsolate city / standing in amber." Amber traps things and preserves them, so this city feels frozen, silent and sad, like something caught mid-life and unable to move. The word "disconsolate" gives it a grief that nothing can fix.
The mood is hushed, eerie and a little mournful. The title, "Underworld," hints at myth, a realm of the dead, though the poem never says so outright. What the speaker feels seems to be a mix of awe and unease: the body has changed to fit this place, and it's strange and beautiful, but also lonely.