* Noun: This is the most common usage, referring to a domesticated animal kept for companionship or pleasure.
* Example: "My pet is a cat."
* Verb: It can mean to caress or stroke gently.
* Example: "She petted the dog's fur."
* Adjective: It can describe something as being small or insignificant, often used in the phrase "pet project."
* Example: "His pet theory was that the world was flat."
So, the part of speech for "pet" depends on its context in a sentence.