Pirl

Origin

The verb is from the 16th century. Origin uncertain, related to purl, pirn, prill (OED; more at pern, preen).

The noun is derived from the verb in the 19th century.

Full definition of pirl

Verb

1. to twist or wind, especially into a cord or braid etc.
2. to ripple, swirl, especially of water
3. (transitive) to cause to revolve or spin

Noun

1. a ripple; a twist or curl