Definitions of purl:

• noun:   a basic knitting stitch
• noun:   gold or silver wire thread
• verb:   make a murmuring sound

  Example: "The water was purling"

• verb:   embroider with gold or silver thread
• verb:   edge or border with gold or silver embroidery
• verb:   knit with a purl stitch
• verb:   flow in a circular current, of liquids
• name:  A surname (very rare: popularity rank in the U.S.: #34946)