What is "Mapaltech"?
Radak: The fall of those who were killed.
What is the significance of "Kol Mapaltech"?
Malbim: It was a mere Kol (gossip). You did not yet fall totally. Even so, the islands trembled. All the more so they will be terrified on the day that you fall absolutely, that the sea will flood you!
What is the meaning of "be'Enok Chalal"?
Radak: This is like "Ye'enok Chalal" (Yirmeyah 51:52). This is the Neshamah leaving with a voice at the time of death.
Radak citing Targum Yonasan: The moaning of those stricken via a sword.
Malbim: This is [moaning of] people killed during the war; Hereg is after the conquered are in the hand of the victor.
What is the grammatical form of "be'Hareg"?
Radak: This is like b'Hehareg. There is a Tzeirei under the Beis due to the omitted Hei. It says also Hereg (the gerund) after the verb to strengthen the matter, like "Lema'an Tevo'ach Tevach", "Betzo'a Batza" (21:15, 22:27) and similar verses.