(n.) A word used to modify the sense of a verb, participle, adjective, or other adverb, and usually placed near it; as, he writes well; paper extremely white.

adjectival adjective adverbial adversative conjunction attributive conjunction conjunctive adverb coordinating conjunction copulative copulative conjunction correlative conjunction disjunctive disjunctive conjunction exclamatory noun form class form word function class gerundive interjection part of speech participle particle past participle perfect participle preposition present participle subordinating conjunction verbal adjective