This is the 591st most frequent Norwegian word.
hull
"Hull" in Norwegian means "hole" in English.
Here, 'hull' refers to a physical opening or gap in the wall.
Det er et hull i veggen.
There is a hole in the wall.
Here, 'hull' is used metaphorically to describe a lack or deficiency, in this case in knowledge.
Jeg liker å fylle hull i kunnskapen min.
I like to fill gaps in my knowledge.
Here, 'hull' again signifies a physical depression or cavity, this time in the ground.