This is the 841st most frequent Swedish word.
vintern
"The winter."
'Vintern' here is used as the subject of the sentence, referring specifically to the season 'winter' and conveying its general character.
Vintern är kall i Sverige och kommer med snö.
The winter is cold in Sweden and comes with snow.
'Vintern' is utilized in a prepositional phrase 'under vintern', indicating the time span during which the described action occurs.
Under vintern bär många människor varma kläder.
During the winter, many people wear warm clothes.
In this sentence, 'vintern' is part of a temporal phrase 'på vintern', signifying the season when the action described takes place.