spiral
Definitions
A curve that winds around a fixed center point at a continuously increasing or decreasing distance from that point.
A shape or object characterized by a series of continuous circular or coiled turns.
To move in a spiral course or to increase or decrease rapidly and continuously.
Examples
The staircase was designed in a beautiful spiral that wound up to the top floor.
The company's profits began to spiral downward after the sudden loss of their primary investor.