"Polissoir" Natural Recordings by Native Speakers
A polissoir is an ancient tool, typically a rubbing stone or a piece of emery cloth, used for polishing or honing metal tools, such as knives or swords, and also for rubbing and polishing the skin.
To polish something means to make it shiny or reflective by rubbing it with a material such as wax or varnish, or to clean or make something smooth. To polish also means to improve or perfect something, often by practising or rehearsing it. For example, you might polish a floor to make it shine, or polish your English language skills by practising speaking.