en_tn_condensed/rev/01/15.md

like polished bronze, like bronze that had been refined in a furnace

"like bronze that has been purified in a hot furnace and polished"

furnace

a strong container for holding a very hot fire. People would put metal in it, and the hot fire would burn away any impurities that were in the metal.

the sound of many rushing waters

This is very loud, like the sound of a large, fast flowing river, of a large waterfall, or of loud waves in the sea.