This is the 179th most frequent Afrikaans word.
vaaldriehoek
"Vaaldriehoek" refers to the Vaal Triangle, an industrial region in South Africa.
In this sentence, 'vaaldriehoek' is a common noun referring to the industrial region and its environmental characteristics.
Die lug in die vaaldriehoek kan soms besoedel wees as gevolg van die fabrieke.
The air in the Vaal Triangle can sometimes be polluted due to the factories.
Here, 'vaal-driehoek' is a descriptive term combining 'vaal' (gray) and 'driehoek' (triangle) to describe the color and shape, distinct from the geographical term.
As jy ʼn driehoek met vaal lyne teken, kan jy dit na verwys as ʼn 'vaal-driehoek'.
If you draw a triangle with gray lines, you can refer to it as a 'gray triangle'.
Here, 'Vaaldriehoek' is used as a proper noun to denote a well-known geographical area.