1)
What is "Efasah"?
1.
Rashi: This is a noun. It is darkness, like "Shachar Eifah."
2)
What is the meaning of "Tzalmaves v'Lo Sedarim"?
1.
Rashi: There are no customs there, for it is not a settled place. The light there is like darkness.
2.
Ibn Ezra: Sedarim are arrangements of stars. The Targum of "Ya'aroch" is Yesader.
3.
Malbim: Do not say that the darkness of this world is part of the order of the creation - there is light and darkness, and day and night. It is without order.
3)
Why does it say "va'Tofa Kemo Ofel"?
1.
Rashi: The illuminated place in it is dark.
2.
Malbim: The little light in this world, at daybreak, is like Ofel, which is worse than [Stam] darkness.
