The spelling of the word "AFUAN" can be explained using the International Phonetic Alphabet (IPA). The first sound is the open back unrounded vowel represented by /ʌ/. The second sound is the voiceless labiodental fricative represented by /f/. The third sound is the voiced velar nasal represented by /ŋ/. The final sound is the voiceless alveolar nasal represented by /n/. Therefore, the IPA transcription of "AFUAN" is /ʌfnŋn/. When pronouncing this word, the tongue should touch the lower teeth for the /f/ sound and the alveolar ridge for the /n/ sound.