läpikuultamaton
Läpikuultamaton is a Finnish adjective that describes a material or object that does not allow light to pass through it. This is in contrast to terms like läpinäkyvä (transparent) and läpikuultava (translucent), which describe varying degrees of light transmission. A läpikuultamaton object completely blocks light, meaning that one cannot see through it.
Many common materials are läpikuultamaton. For example, wood, metal, stone, and most plastics are not transparent
The concept of being läpikuultamaton is important in various fields. In art and design, the opacity of