"to twist, wind, spin" (thread, etc.), mid-14c. (implied in pirling "revolving"), a word of uncertain origin, perhaps from Old Norse; The Middle English Compendium compares Norwegian purla "spring forth, gush." Compare pern. Related: Pirled.
"to move with a winding motion," a word used in poetry by Yeats from c. 1920, probably from a variant of dialectal pirn (n.) "small cylinder on which thread or yarn is wound (mid-15c.), which seems to have survived in dialects in Celtic parts of Britain. It is perhaps from prin "a twig, shoot of a tree" (c.1400), itself a variant of prene "a nail, spike," from Old English preon.
<a href="https://www.etymonline.com/word/pirl">Etymology of pirl by etymonline</a>
Harper, D. (n.d.). Etymology of pirl. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/pirl