What is the meaning of the word "ṣaqīl" as it appears in the chapter on removing impurity from objects like swords and the like?

The origin of the word "saqeel" (polished) comes from "saqala" (to polish) something, meaning to burnish it. This term is used for a sword. It is mentioned in books of Fiqh, specifically in the Book of Purity (Kitab al-Taharah), to indicate the pardoning of a small amount of impurity, such as blood and the like, if it is on polished surfaces like a sword or a mirror.