What is roadster? How to use in English

The term "roadster" originated in the late 19th century, specifically in the United States, to describe open-top lightweight cars designed for speed and agility on windy roads. The word "roadster" is believed to have been coined by combining the words "road" and "ostoner," the latter being a type of horse-drawn carriage popular in Boston, Massachusetts. The Bostonster was a lightweight carriage designed for racing, and the term "roadster" was applied to the early automotive versions of this carriage as they shared the same features of lightness, speed, and agility on windy roads. Initially, the term "roadster" was used for both electric and gasoline-powered cars, but by the 1920s, it specifically referred to two-seat open-top cars powered by gasoline engines. Over time, the definition of a roadster has evolved, and while the term is still used to describe two-seat open-top cars, it has come to encompass several subcategories, such as convertibles, soft-top roadsters, and hard-top roadsters. However, the essence of the original definition remains the same, i.e., roadsters are designed for speed, handling, and enjoyment on winding roads.