what-is a pronoun (interrogative pronoun) asking for information specifying something
Example: what is your name?
Which- is an interrogative pronoun and determiner, asking for information specifying one or more people or things "example"{as pronoun--which are the best varieties of grapes for long keeping?}
[as determiner- which way is the wind blowing].
Witch is a noun
An adjective, in modern usage. It was also used a noun, to mean a supernatural companion of a witch, when many people believed in witches.
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 part of speech for "unfamiliar" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "twirl" is a verb.
The part of speech for "explicit" is an adjective.
The part of speech for "indefinite" is an adjective.