The spelling of the word "Parietis" is derived from the Latin word "paries," meaning wall. In IPA phonetic transcription, it is pronounced as /pəˈraɪ.ə.tɪs/. The letter "i" is pronounced as a long "ai" sound and the final "is" is pronounced as a soft "tis" sound. This word is commonly used in anatomy to refer to the wall of a cavity or hollow structure. Proper spelling and pronunciation of medical terminology is crucial for accurate communication in the healthcare field.