No, the word 'through' is an adverb, an adjective, and a preposition. The adverb 'through' is a word that modifies a verb, an adjective, or another adverb.
… Example: We came through without a scratch. The adjective 'through' is a word that describes a noun. Example: Take Western Avenue, it's a through street. The preposition 'through' connects a noun or a pronoun to another word in a sentence. Example: I spotted a lion through my binoculars. A pronoun is a word that takes the place of a noun or another pronoun in a sentence. Example: Jack and I were fearful but we came through without a scratch. The pronoun 'we' takes the place of the subject noun and pronoun (Jack and I) in the second part of the compound sentence. The pronoun 'I' takes the place of a noun for the person speaking. (MORE) 
