1)
What is the meaning of "Lekatzos"?
1.
Rashi: This is like "Katzti b'Chayai" (Bereishis 27:46; I am disgusted).
2.
Radak: It is to cut, like "Mekatzeh Raglayim Chamaas Shoseh" (Mishlei 26:6).
3.
Malbim: He began to strike those who dwell at the Ketzeh (end), east of the Yarden.