The word 'part' can be 1) a noun, 2) an adjective, 3) a verb, or 4) an adverb.
1) My mother gave me part of her dessert, as she was not very hungry.
2) What he has written is part novel and part poem.
3) He threatened to part me from my family and friends.
4) This invoice has been part-paid.
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
what part of speech is beneath
adverb
The part of speech for "explicit" is an adjective.
The part of speech for "lecturer" is a noun.
The part of speech for "rapid" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "breezy" is an adjective.
The part of speech for "buried" is a verb.
The part of speech for "indefinite" is an adjective.