The spelling of the word "Mooneyhan" can be explained through the use of IPA phonetic transcription. The word is pronounced as /munihan/, with the emphasis on the second syllable. The "M" in Mooneyhan is pronounced as /m/, and is followed by the diphthong "oon" which is pronounced as /uːn/. The next syllable is pronounced as /i/, and the final syllable "han" is pronounced as /hæn/. Overall, Mooneyhan is spelled based on its pronunciation, with each letter representing a specific sound in the word.