This is the 80th most frequent Arabic word.
بن
"بن" in Arabic means "coffee beans."
Here, 'بنّة' (bunna) is used colloquially to refer to coffee as a product.
قهوة بنّة لذيذة.
The coffee is delicious.
Here, 'ابن' (ibn) is used to mean 'son,' showing family relations.
ابن النجّار يصنع الأثاث.
The carpenter's son makes furniture.
In this context, 'بن' (bunn) refers to the coffee plant or its beans.