purl 2 also pearl 
(pûrl)
(pûrl)v. purled, purl·ing, purls also pearled or pearl·ing or pearls
v.tr.
1. To knit (yarn) with a purl stitch.
2. To edge or finish (a handkerchief, for example) with lace or embroidery.
v.intr.
1. To do knitting with a purl stitch.
2. To edge or finish with lace or embroidery.
n.
1. Abbr. p. Inversion of a knit stitch; purl stitch.
2. A decorative edging of lace or embroidery.
3. Gold or silver wire used in embroidery.
[Origin unknown.]