This is the 13302nd most frequent Swedish word.
tvärs
"Tvärs" means "across" or "crosswise" in English.
In this sentence, 'tvärs' is used to mean 'across', indicating movement crossing from one side of the street to the other.
Han gick tvärs över gatan.
He crossed the street.
Here, 'tvärs' signifies a position or orientation opposite or across from the other person in the room.
De satt tvärs igenom rummet från varandra.
They sat across the room from each other.
'Tvärs' in this context means 'across', denoting the direction of the wind moving across the structure of the house.