"Copple dust" is a term used to describe the fine particles that are produced during the process of grinding or crushing stones. The spelling of this word can be explained using the International Phonetic Alphabet (IPA) transcription. The first syllable is pronounced as /kɒpəl/, with the 'o' sound as in 'top' and the stress on the first syllable. The second syllable is pronounced as /dʌst/, with the 'u' sound as in 'but'. When combined, "Copple dust" creates a unique sound that is specifically associated with this process.