How do you use the word purred in a sentence?

Here are a few examples of how to use "purred" in a sentence:

* The cat purred contentedly as I scratched behind its ears. (This sentence shows a typical use of "purred" to describe the sound a cat makes.)

* The old engine purred smoothly, a comforting sound in the quiet countryside. (Here, "purred" is used figuratively to describe a pleasant, low sound.)

* She purred with satisfaction as she watched the rain fall outside her window. (In this sentence, "purred" is used metaphorically to describe a feeling of contentment or pleasure.)

* The bass guitar purred a low, rhythmic groove, driving the song forward. (This example uses "purred" to describe the sound of a musical instrument.)