Albert Barnes Commentary Jeremiah 50:2

"Declare ye among the nations and publish, and set up a standard; publish, and conceal not: say, Babylon is taken, Bel is put to shame, Merodach is dismayed; her images are put to shame, her idols are dismayed." — Jeremiah 50:2 (ASV)

Confounded ... confounded - ashamed ... ashamed.

Merodach - This deity, in the inscriptions Marduk, was the tutelary god of Babylon, and Nebuchadnezzar, who called his son Evil-Merodach, appears to have been especially devoted to his service. He was really identical with Bel, and his equivalent among the planets was Jupiter: and as such he was styled “King of heaven and earth.”