What is the Nimshal of "Kulah b'Chakah He'alah"?
Rashi: This Rasha raised (trapped) every man with his hook.
Radak: Nebuchadnetzar raised (trapped) the entire world with his hook. Because people were compared to fish, and Nebuchadnetzar to a trapper, it mentions a hook and nets. The vowels of He'alah are unusual. We find like this ? "Lamah He'avarta Ha'avir" (Yehoshua 7:7).
Malbim: Chakah is used to catch big fish.
What is the meaning of "Yegorehu"?
Rashi: This is [gathering] like "Agrah va'Katzir" (Mishlei 6:8), "Nehersu Mameguros" (Yo'el 1:17) [Radak ? and "Yeguru Milchamos" (Tehilim 140:3)].
What is "Chermo"?
Radak: His net. This is like "Yatzudu Cherem" (Michah 7:2), "Mishtach Charamim" (Yechezkel 26:5).
Malbim: It is a net used to catch intermediate size fish. It is normal to spread many, in order to catch many fish.
Why does it add "v'Ya'asfehu b'Michmarto"?
Radak: The matter is repeated in different words.
Malbim: Michmar is spread on the surface of the water. All fish that enter cannot leave. Via this, they catch many fish at once. The verse depicts that initially, he conquered special countries one by one, and with great strength, like one who raises with a hook. After, he conquered smaller scattered countries. This was easier, like one who gathers with a Cherem. Afterwards, he conquered all nations, like one who collects all small fish in Michmarto.
Why will he rejoice?
Radak: When he succeeds in his deeds and conquers everything like his desire, he is happy.