Continuous decline in performance, mood.

Stairs winding around central axis.

Rotating disks with spiral arms.

Disk-shaped, stars spiraling outwardly.

Continuous cycle of rising prices.

(figurative) A situation where something is constantly increasing.

Neurons transmitting sound to brain.

Notebook with coiled wire binding.

Iterative design, risk-driven approach.

Regions of stars in galaxies.

Spiral increasing exponentially from origin.