1)
What is the meaning of "Hitalti"?
1.
Radak, Malbim: I will cast.
2)
Will they truly serve other gods day and night?
1.
Rashi citing Targum Yonasan: They will serve nations that serve falsity day and night.
2.
Malbim: Yes. Because you served [idolatry] in Eretz Yisrael to anger Hashem, so the enemy will force you to serve idolatry.
3)
What is "Chaninah"?
1.
Radak: It is mercy. The enemies will not have mercy on you. They will make you work relentlessly.