Refined is a verb (past tense of refine) and an adjective (refined sugar).
"Crude" can be used as both an adjective and a noun. As an adjective, it describes something in a raw or unrefined state. As a noun, it refers to a person who lacks refinement or is vulgar.
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.