"Etymologiae" is a comprehensive work by the early medieval scholar Isidore of Seville, written around 600 AD. It serves as an encyclopedia, compiling knowledge from various fields such as grammar, rhetoric, medicine, and history. The text is organized into twenty books, each focusing on different subjects, and aims to explain the origins and meanings of words. The work is significant for its role in preserving classical knowledge during the Middle Ages. It influenced later scholars and became a standard reference for education in Europe. "Etymologiae" reflects the intellectual efforts of its time to categorize and understand the world through language.