About
The character "砑" is formed from the semantic component "石", meaning stone, and the phonetic component "牙", meaning tooth. Its structure consistently points to an action involving a stone tool, as its core meaning has long been to grind, polish, or press smooth with a stone roller. Over time, this specific sense of grinding with stone extended to more general applications of pressing and smoothing other materials, such as paper or fabric, to make them glossy or flat, while the original connection to the hardness and function of stone and the abrasive action suggested by "tooth" remained evident in its composition.