The spelling of the word "Jacki" may vary depending on its origin or purpose. However, if we consider it as a common proper noun, the most common spelling would be "Jackie." This name is typically pronounced as /dʒækɪ/ (JACK-ee), with stress on the first syllable. The "a" is pronounced as the short "a" sound, and the "ie" is pronounced as the "ee" sound. It is important to note that the spelling and pronunciation of names can vary widely based on cultural or regional factors.