Chondriodieresis is a rarely used medical term that refers to the formation of cartilage. Its spelling can be challenging due to its long and complex structure. The word is pronounced as /kɒndraɪəʊdɪɛrɪsɪs/. The first syllable is pronounced as "kon-dry" with a short "o" sound, followed by "oh" in the second syllable. The "-dieresis" part is pronounced as "dee-er-ee-sis". Overall, the word's spelling and pronunciation can be quite daunting, making it one of the more technical terms in medical jargon.