This is the 201st most frequent Icelandic word.
vetur
"Vetur" means "winter."
Here, 'vetur' (translated as 'winter') is used as a noun to describe the season itself, with 'veturinn' being the definite form.
Veturinn á Íslandi getur verið bæði harður og yndislegur.
The winter in Iceland can be both harsh and wonderful.
In this sentence, 'vetur' (translated as 'winter') is used to specify the time of the trip, referring to the period of last winter.
Við fórum í ferðalag síðastliðið vetur.
We went on a trip last winter.
Here, 'vetur' (translated as 'winter') is used as a noun to denote an upcoming season, expressed with a qualifier 'næsta' meaning 'next'.