The spelling of the word "cummiskey" can be explained through its phonetic transcription in IPA. The first syllable "cum" (kʌm) is pronounced with a short "u" sound followed by a hard "c" sound. The second syllable "mis" (mɪs) is pronounced with a short "i" sound followed by an "s" sound. The final syllable "key" (ki) is pronounced with a long "e" sound followed by a hard "k" sound. Therefore, the correct spelling of this word is "cummiskey."