The spelling of the word "most duodenary" is actually incorrect. The correct spelling should be "most dodecenary," which means "based on or consisting of 12 parts." The pronunciation of this word is /məʊst dəʊˈdɛsənəri/ ("mohst doh-DESS-en-uh-ree"), with the stress on the second syllable. It is important to use the correct spelling and pronunciation of words to effectively communicate with others and avoid confusion or misinformation.