How Do You Spell MCMILLION?
Pronunciation: [məkmˈɪli͡ən] (IPA) 
The spelling of the word "McMillion" is quite straightforward once you break it down phonetically using IPA transcription. To start, the beginning "Mc" is pronounced as /məˈk/ with two separate syllables. The "mill" portion is pronounced as /ˈmɪl/ with a short "i" sound. Finally, the "ion" is pronounced as /iːən/, with a long "i" sound followed by the schwa sound. Altogether, "McMillion" is spelled as /məˈk.mɪl.iːən/.
