The spelling of the word "yahn" can be confusing as it is not a commonly used word in English. However, its pronunciation follows the IPA phonetic transcription /jɑːn/. The "y" represents the consonant /j/, which is similar to the "y" sound in "yes." The "a" is pronounced as /ɑː/, which is a long "a" sound. Finally, the "n" represents the consonant /n/. Overall, "yahn" is pronounced as "yahn" with a long "a" sound at the beginning.