What is shelves? How to use in English

The word "shelves" has a fascinating history. The term originates from the Old English word "scelf" or "shelf", which means "a slope" or "a leaning". This is likely derived from the Proto-Germanic word "*skalfiz", which is also the source of the Modern English word "sloped". In the 14th century, the term "shelf" referred to a sloping or inclined surface, such as a mountainside or a sloping roof. Over time, the term evolved to refer to a flat, horizontal surface, often raised above the ground, used for storing or displaying objects. This sense of the word is first recorded in the 15th century. Today, we use the plural form "shelves" to refer to multiple such surfaces, often used in bookcases, kitchen cabinets, and other storage containers.