1)
What is the meaning of "Chirvu"?
1.
Radak: Kill [Malbim - via a Cherev (sword)].
2)
What are "Pareha"?
1.
Rashi: They are its officers. Nevi'im often refer to officers as mighty bulls and male goats.
2.
Radak, Targum Yonasan: The great people and Giborim. This is like "Sevavuni Parim Rabim" (Tehilim 22:13).
3)
What are "Yomam" and "Es Pekudasam"?
1.
Malbim: Yomam is their day to be slaughtered. Es Pekudasam is the time to punish them for their sin.
