The word purred is a verb. It is the past tense of purr.
The complete subject of this sentence is "The cat." Everything from "purred" on is part of the predicate. The cat did what? Purred. How? With pleasure. At what? At the visitor's skill.
Yes because it is an action.
The race car's motor purred like a kitten. The kitten purred when it nestled up against her mother.
"The cat purred." is a sentence because it has a subject, which is the cat and a verb which is purred. A sentence fragment has either a missing subject, a missing verb, or both.
it is fitz and blair
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The past tense is purred.
The part of speech for "unfamiliar" is an adjective.