adjective An adjective is a word that describes or modifies a noun or pronoun. In this case, 'unaltered' describes something that has not been changed or modified.
adverb An adverb is a word that modifies a verb, adjective, or another adverb. In this case, 'unaltered' could be used to modify a verb or adjective to indicate that something has not been changed in a particular way.
noun a person who uses color in a skilled or creative way, especially in art or design