pur

noun
  1. A low, continuous, vibrating sound typically made by a cat when it is contented. noun
    The cat began to pur softly as it lay on her lap.
    She could hear the gentle pur of the kitten as it snuggled closer.
  2. To make a low, continuous, vibrating sound, as a cat does when content. verb
    The cat purred contentedly while being petted.
    He could hear the cat pur from across the room.