purr

n purring sound （猫的）呼噜声; （机器的）呼隆声: the contented purrs of the cat 猫表示满足的呼噜声.

puritanical, puritanically, puritanism, purity, purl, purlieu, purlieus, purloin, purple, purple heart, purplish, purport, purpose, purpose-built, purposeful, purposefully, purposeless, purposelessly, purposely, purposiveness, purse, purser, pursuance, pursuant, pursue, pursuer, pursuit, purulence, purulent, purvey, purveyance, purveyor, purview, pus, push, push-bike, push-button, push-cart, push-chair, push-over,