The spelling of the word "Effi" is relatively straightforward. It is pronounced as /ˈɛfi/ in IPA phonetic transcription. The first syllable "ef" is pronounced as the letter "f" followed by a short "e" sound. The second syllable "i" is pronounced as a long "e" sound. Overall, the word is spelled phonetically and is easy to pronounce once you understand the pronunciation of each individual letter.
"Effi" is not a term that has a widely recognized dictionary definition as it does not appear to have a standard meaning in the English language. It is possible that you are referring to a specific term in a different language or have mistyped or misunderstood the term. However, if you are looking for a description of a term or concept related to "Effi," it may be helpful to provide more context or clarification so that a more accurate definition can be provided. Without additional information, it is difficult to provide an appropriate definition for the term "Effi" in the English language.