An informal drawing or message on a public wall or surface, often done without permission.
The old wall was covered in graffito from people passing by.
古い壁は通り過ぎた人々の落書きで覆われていた。
Artwork made by scratching a design into a surface to show the layer underneath.
The graffito on the metal plate was created by scratching away the top layer.
金属板のグラフィティは、上層を削ることで作成されました。