The spelling of the word "Reimann" can be explained through IPA phonetic transcription as /ˈɹaɪmən/. The first syllable "Rei" is pronounced with the long "i" sound, while the second syllable "mann" is pronounced with the "a" sound. This spelling is commonly used as a surname, particularly in German-speaking countries. It is important to note that the spelling of this word may vary depending on regional dialects and pronunciations.