1)
What is "v'Chupar Brischem"?
1.
Rashi: Your Bris with death (15) will be nullified. Kaparah is an expression of cleaning and removal. The same applies to "Achaperah Panav" (Bereishis 32:21).
2.
Malbim: Your Bris with Ashur and Egypt will cease.
2)
What is "Chazuschem"?
1.
Rashi: It is what you said "v'Im She'ol Asinu Chozeh" (15).
3)
Why does it say "Shot Shotef"?
1.
Rashi: You said "Lo Yevo'enu" (15). You err - "vi'Hyisem Lo l'Mirmas"!
4)
What will trample them?
1.
Malbim: Machaneh Ashur, which will pass in Eretz Yehudah.