The spelling of the word "Kephyr" is based on the original Greek word "Ζέφυρος" (Zéphyros) which means "west wind". In English, the word is spelled with a "K" instead of a "Z" to reflect its German and Scandinavian roots. The correct pronunciation of "Kephyr" is /ˈkɛfər/ with the stress on the first syllable. As for the spelling, the "ph" is pronounced as an "f" sound, and the "y" is used to represent the "i" sound, which is common in certain Germanic languages.