spiro-, spir-, spiri-

The Greek speira refers to anything which is wound or wrapped around something. In the plural, speirai, it includes the twisted folds or coils of a serpent or of a net; therefore, it refers to anything which is coiled, wreathed, or twisted; such as, a coil of a snake.

Careful, there is another spiro- which means "breath of life; breathing, breath".