Acute kidney failure can be fatal and requires intensive treatment. However, acute kidney failure may be reversible. If you're otherwise in good health, you may recover normal or nearly normal kidney function.
winding - the act of winding or twisting; he put the key in the old clock and gave it a good wind. wind, twist. rotary motion, rotation - the act of rotating as if on an axis; the rotation of the dancer kept time with the music.
Definition of spiral for English Language Learners. : 1  to move in a circle around a central point while getting closer to or farther away from it : to move in a spiral. : 2  to greatly increase, decrease, or get worse in a continuous and usually fast and uncontrolled way.