The spelling of the word "reiff" can be explained using the International Phonetic Alphabet (IPA) phonetic transcription. The IPA symbol for /r/ represents the beginning sound of the word, followed by the symbol for /i/, which represents the short "i" sound. The next two symbols, /f/ and /f/, represent the double "f" sound at the end of the word. Therefore, the correct spelling of this word is "reiff," with the pronounced sounds being /rɪff/.