What is the meaning of "v'Ha'avarti"?
Radak: I will pass you to your enemies, to a land that you did not know.
Targum Yonasan: You will be enslaved to your enemies. Radak - his text said v'Ha'avadti, with a Dalet. The correct text has a Reish here, and a Dalet in Parshas Chatas Yehudah.
Malbim: Also later when you go to Egypt, you will not be saved. I passed your enemies, i.e. the Bavliyim, to Egypt, and there Nebuchadnetzar's sword will catch you.
Why does it say "Es Oyvecha"?
Radak: This is like El Oyvecha. Also "v'Har'ah Es ha'Kohen" (Vayikra 13:49) is like El ha'Kohen.
What is the meaning of "Kadcha"?
Radak: This is Po'el Omed (the action applies only to the subject); it burned.
Why does it say "l'Olam Tukad"?
Malbim: [My anger will burn] also after the Churban.