The spelling of the word "Achidan" is straightforward as it follows a phonetic pattern. The IPA phonetic transcription for the word is /ætʃɪdən/. The "ch" sound is pronounced as /tʃ/, which is a combination of the sounds /t/ and /ʃ/. The "i" is pronounced as /ɪ/, making the "a" in "Achidan" pronounced as /æ/. The final syllable is pronounced as /dən/. Overall, the spelling accurately represents the sounds in the word.