The spelling of the word "ertel" is relatively simple. It is spelled as /ˈɛrtəl/, which means there are four sounds: /ɛ/ for the "e" sound, /r/ for the "r" sound, /t/ for the "t" sound, and /əl/ for the "el" sound. The IPA phonetic transcription is an efficient method of explaining the pronunciation and spelling of words. Overall, mastering the IPA system is a useful tool for improving spelling and pronunciation when learning new words in the English language.