The proper spelling of the word "more maintaining" is /mɔːr meɪnˈteɪnɪŋ/. It is composed of two separate words "more" and "maintaining". "More" means a greater or additional amount or degree, while "maintaining" means keeping something in a particular state, condition or position. The word "maintaining" is spelled with a "t" after "n" to indicate the present participle form. Correct spelling is important to accurately convey meaning and avoid confusion in communication.