Why did he say "Lachen"?
Radak: Now that they wanted to kill me, I may pray for evil to befall them.
What is the meaning of "Hagirem"?
Rashi: Bring them down [via the sword] 1 . This is like "Eini Nigrah" (Eichah 3:49), "k'Mayim Mugarim" (Michah 1:4).
Radak: This expression is used for killing via the sword, for it makes the blood descend. The same applies to "Yagiruhu Al Yedeu Cherev" (Tehilim 63:11).
What sword does this refer to?
Rashi: It is the sword of troops.
What is "Harugei Maves"?
Rashi: Via the angel of death.
Radak: Via a plague.
Malbim: It is unusual deaths.
Why will they die in different ways?
Malbim: The children will remain in the city; they will starve. The husbands, and Bachurim (Giborim) will go out to war and die via the sword. Ansheihem who do not go out to war will die unusual deaths.