What is "ch'Sho'eh"?
Rashi: Like a cloud that rises suddenly.
Malbim: [The fear will come] like darkness. It increases in darkness, for one does not see the matter that he fears.
What is "k'Sufah"?
Rashi: Like a storm. Malbim - the affliction will come immediately after the darkness and fear.
What is the meaning of "Ye'eseh"?
Rashi: It will come. Malbim - this refers to something that comes absolutely. It came, and is recognized via its signs.
What are "Tzarah v'Tzukah"?
Malbim: Tzarah is the external affliction. Tzukah is the inner affliction of the Nefesh. When this accompanies the external affliction, it is very bad and bitter, for all hope is lost. He totally despairs.