spiral >> ˈspʌɪr(ə)l
Definition: [adjective] winding in a continuous and gradually widening (or tightening) curve, either round a central point on a flat plane or about an axis so as to form a cone.
Example: a spiral pattern
Definition: [noun] a spiral curve, shape, pattern, or object.
Example: a spiral of smoke
Definition: [noun] a progressive rise or fall of prices, wages, etc., each responding to an upward or downward stimulus provided by a previous one.
Example: an inflationary spiral
Definition: [verb] move in a spiral course.
Example: a wisp of smoke spiralled up from the trees
Definition: [verb] show a continuous and dramatic increase.
Example: inflation continued to spiral