The spelling of the word "Chaunsey" may seem confusing, but it can be explained using IPA phonetic transcription. The first sound is represented by the letter "Ch" which corresponds to the voiceless velar fricative /x/. The following vowels, "au" and "ey", are pronounced as /ɔː/ and /eɪ/ respectively. The final sound is represented by the letter "s", which corresponds to the voiceless alveolar fricative /s/. Therefore, the IPA phonetic transcription for "Chaunsey" would be /xɔːnseɪ/.