Pronunciation: [ɐkˈɪliː ɹˈati] (IPA) 
The spelling of the name "Achille Ratti" can be explained using the International Phonetic Alphabet (IPA) as [aˈkille ˈratti]. The initial "A" is pronounced as a short "a" sound, followed by a "k" sound. The "i" in "Achille" is pronounced as a long "e" sound. The second part of the name, "Ratti," is pronounced with a rolled "r" sound and two short "a" sounds. The final "i" in "Ratti" is pronounced as a long "e" sound.
Achille Ratti, born on May 31, 1857, in Desio, Italy, was an Italian prelate who later became Pope Pius XI (1922-1939). He is known for his contributions to the Catholic Church as a scholar, diplomat, and Vatican official.
Achille Ratti began his ecclesiastical career as a professor of patrology in Milan and was subsequently appointed as the librarian and archivist of the Ambrosian Library. He gained recognition for his expertise in church history and antiquities, publishing various scholarly works on these subjects. Ratti also served as a papal diplomat in Poland, where his efforts to foster unity among the various Catholic communities earned him respect and admiration.
In 1921, Ratti was appointed as Cardinal-Priest of the Basilica of San Lorenzo in Lucina in Rome. The following year, he was elected as Pope Pius XI. During his pontificate, he emphasized the importance of Catholic social doctrine and worked towards improving relations between the Church and the secular world. Pope Pius XI is particularly remembered for his encyclical "Quadragesimo anno," which addressed social justice and economic issues.
Achille Ratti, also known as Pope Pius XI, is remembered as a scholarly and diplomatic pontiff who made significant contributions to Catholic theology, history, and social doctrine. His papacy left a lasting impact on the Church and its engagement with the modern world.
The word "Achille Ratti" is not an actual word but a proper name of an individual.
Achille Ratti was the birth name of Pope Pius XI, who served as the head of the Catholic Church from 1922 to 1939. As such, its etymology is tied to his particular personal history rather than the origin of a word or term.
