This is the 834th most frequent Swedish word.
tung
"Heavy" or "tongue," depending on context.
The word 'tung' here is used to describe the physical weight of the book.
Boken var tung att bära.
The book was heavy to carry.
In this context, 'tung' means mentally difficult or emotionally challenging.
Det blev en tung dag för oss alla.
It turned out to be a heavy day for all of us.
Here, 'tung' signifies an impactful or substantial argumentation in terms of content.