Radak: You were haughty, and imagined that you are like Kel, because you ruled over all nations. Now it is seen that your pride descended to the grave; you are like any person.

Malbim: Other kings, even though their pride descends to the grave, people remember their deeds forever in songs that describe their mighty acts. You, also your lyres will be silent; people will not recall your deeds.

Rashi #1: Harps and lyres that they used to play in front of you. Radak - they descended to the grave with you, for your Simchos ceased.

Rashi #2: The clamor of Bnei Navel - people who do base acts among your soldiers ¹ .

Radak: In your lifetime, you had dear sheets under you and esteemed covers. Now in your death they will be worms. It says "Yutza" and "u'Mechasecha" (masculine), even though Rimah and Tole'ah are feminine, for it refers in general to many worms. Verses sometimes discuss the Klal in the masculine, and sometimes in the feminine. "U'Mechasecha Tole'ah" is masculine, and "v'Rimah Techaseh Aleihem" (Iyov 21:26) is feminine. We similarly find "va'Tehi ha'Kinam" (feminine), "va'Ta'al ha'Tzfarde'a" (masculine; Shemos 8:14, 2).