The spelling of the word "neyman" can be explained using the International Phonetic Alphabet (IPA) phonetic transcription. In this transcription, the word is spelled as /ˈnaɪmən/. The first sound is the "n" sound, followed by the "ai" diphthong sound, and then the "m" and "ən" sounds. This pronunciation is used for the last name of the famous statistician Jerzy Neyman, who is known for his contributions to the theory of hypothesis testing in statistics.