This is the 360th most frequent Norwegian word.
tett
Compact, dense, or close.
In this usage, 'tett' means sealed or not allowing air or liquid to pass through.
Vinduet er tett, så det trekker ikke.
The window is sealed, so there is no draft.
Here, 'tett' means close or near in proximity.
Vi bor tett ved skolen.
We live close to the school.
In this context, 'tett' means in close contact or proximity to a surface.