The word "more unfunctional" is not grammatically correct. The correct form would be "more dysfunctional". The pronunciation for dysfunctional is [dis-fuhngk-shuh-nl] with the primary stress on the second syllable. The word is formed by adding the prefix "dys" (meaning "bad") to the word "functional". The prefix "un" would mean "not" and would create a double negative in this case, making the word grammatically incorrect. It is important to use proper spelling and grammar in written and spoken communication.