The spelling of the word "Kuhns mask" can be explained using the International Phonetic Alphabet (IPA). "Kuhns" is pronounced /kuːnz/ with the "k" sound at the beginning followed by a long "oo" sound and ending with a "nz" sound. "Mask" is pronounced /mæsk/ with a short "a" sound followed by the "sk" sound. Together, the phrase is pronounced /kuːnz mæsk/. The correct spelling of the word is important for communication and understanding, especially in fields like medical research where accuracy is crucial.