The spelling of the word "Arenz" can be explained through its phonetic transcription using the International Phonetic Alphabet (IPA). The first sound, "a", is pronounced as /æ/ which represents the short "a" sound. The next sound, "r", is represented by /ɹ/ which is the "r" sound in English. The third sound, "e", is pronounced as /ɛ/ which represents the short "e" sound. The final sound, "nz", is represented by /nz/ which is pronounced as a combination of the "n" and "z" sounds.