The spelling of the word "Ader Wax" can be explained using the International Phonetic Alphabet (IPA) phonetic transcription. The first sound, "a", is pronounced as the "æ" sound, similar to the "a" in "cat". The "d" sound is pronounced as the "d" sound, while the "er" sound is pronounced as the "ər" sound as in "butter". Lastly, the "wax" sound is pronounced as the "wæks" sound. Putting it together, the correct IPA phonetic transcription for "Ader Wax" is /ædər wæks/.