What is the meaning of "Aval"?
Rashi: It is an expression of Aveilus (mourning).
Radak: It is an expression of destruction. The same applies to "Al Ken Te'eval ha'Aretz" (Hoshe'a 4:3). Eretz is masculine and feminine.
Which Eretz is discussed?
Malbim: Eretz Yehudah.
What is the meaning of "Hechpir Levanon"?
Malbim: The forest will be desolate.
What is "Kamal"?
Rashi: It is dry and cut off.
Why does it say "Hayah ha'Sharon"?
Rashi: It is past tense. Sharon is a place where animals graze - '[the best] rams are from Mo'av, and calves from Sharon' (Menachos 87a).
Radak: Sharon is a fat, fertile place. It will be a Midbar.
What is "Aravah"?
Rashi: It is a ruin.
What is the meaning of "v'No'er"?
Rashi: It is an expression of choking, like "va'Yna'er Hashem" (Shemos 14:27).
Radak: The trees will cast down their fruits.
Malbim: [The enemy] destroyed [also Bashan and Karmel].
