What is the meaning of "Shalosa Goyim Rabim"?
Rashi: You cast them and strewed them from their place.
Radak: This is from the root Shalal (spoils). Shalosa and Yeshalucha have the grammatical form of Sabosa and Yesavucha.
Malbim: This is the loan in the Mashal. You plundered many nations. This is like a loan, and you must pay what you plundered, and also Ribis.
Why does it say "Yeshalucha Kol Yeser Amim"?
Rashi: This is what the Nochrim emit.
Radak: "Yeser Amim" are what remain from the nations that you did not plunder them ? Madai and Paras.
Malbim: What remains from the nations (those that you did not kill), they will plunder you.
What is the significance of "mi'Demei Adam"?
Rashi: Vengeance of blood of Yisrael, who are called Adam ? "Adam Atem" (Yechezkel 34:31).
Radak, Malbim: This evil came to you due to much blood that you spilled and theft that you did in the land.
What is "Chamas Eretz"?
Rashi, Targum Yonasan: [Theft of] Eretz Yisrael.
Radak: Refer to 2:8:3:2.
Does this refer to any city?
Rashi: It is Yerushalayim. Radak ? this is the meaning of Targum Yonasan 1 'Karta d'Yisrael.'
Radak: Yes ? he used to destroy cities and kill the residents.
Malbim: It is Bavel, the capitol 2 .
Below (17), Targum Yonasan of Kirya is 'Karta Yerushalayim.'
Also Radak (Bereishis 11:9) and R. Nisim Gaon (Shabbos 36b DH Nafka) say that there is a city Bavel, and so implies Rashi (ibid.) Tosfos and Tosfos ha'Rosh (ibid.) disagree; it is only the name of the country.