The correct spelling of the word "more nonserious" in IPA phonetic transcription is /mɔr ˌnɑnˈsɪriəs/. The word "nonserious" is spelled with a double "n" followed by "s" to indicate that the stress is on the second syllable. The addition of "more" in front of "nonserious" indicates an increase in the degree of nonseriousness. Correct spelling is important in order to convey the intended meaning of words accurately and effectively.