The spelling of the word "NMESSAIAN" can be explained using the International Phonetic Alphabet (IPA). The first syllable, "NM," is actually pronounced as a single consonant cluster consisting of a nasal "n" and a bilabial nasal "m." The second syllable, "ESS," is pronounced with a long "e" sound and a voiceless "s" sound. The final syllable, "AIAN," is pronounced with a diphthong that combines an "a" sound with an "ee" sound, and the stress is on the second syllable.