In what way is he an Oni?
Malbim: My Nefesh is poor and humble.
What is "Gove'a mi'No'ar"?
Rashi: If one dies amidst choking, this is sudden death - "va'Yna'er Hashem" (Shemos 14:27).
Rashi citing Menachem: It is an expression of banging, like "No'er Kapav mi'Temoch ba'Shochad", "Hisna'ari me'Afar Kumi" (Yeshayah 33:15, 52:2).
Radak: From the days of Ne'urai (my youth) I suffer this affliction, and I am dying, like one who suffers incessantly. I.e. all my days from youth to old age were evil, and I do not cast off Your yoke due to my great afflictions, even though You do not save me. Rather, I always fear You.
Malbim: My body is weak and pines away, from my youth.
What is "Afunah"?
Rashi: Fear of You is settled and based in my heart. This is like "Davar Davur Al Afnav" (Mishlei 25:11).
Radak: This is based on Pen, just like v'Tahinu (Devarim 1:41) is based on Hen (preparation). I always fear lest such and such occur to me.
Malbim: [I fear You in every place to which] I turn. It is as if I want to turn my face to another side due to fear of You, and [the fear] scares me from every side.
