purl 1 
(pûrl)
(pûrl)intr.v. purled, purl·ing, purls
To flow or ripple with a murmuring sound.
n.
The sound made by rippling water.
[Probably of Scandinavian origin.]
- protonematal
- protonic
- protonotary
- protonotary
- protonotary apostolic
- proton-proton chain
- proton pump inhibitor
- proton synchrotron
- proto-oncogene
- protopathic
- protopathy
- protoplanet
- protoplanetary disk
- protoplasm
- protoplasmal
- protoplasmatic
- protoplasmic
- protoplast
- protoplastic
- protoporphyrin
- protostar
- protostele
- protostelic
- protostome
- prototroph