This is the 96th most frequent Norwegian word.
fjor
"Fjor" means "last year" in English.
Here, 'fjor' is used in the adverbial phrase 'i fjor' which translates to 'last year.' It denotes the year before the current one.
I fjor dro vi til Norge på ferie.
Last year, we went to Norway for vacation.
'Fjor' here is a noun referring specifically to the previous year in a definite form.
Vi skal gjenoppleve minnene fra fjor.
We are going to relive the memories from last year.
Similarly, in this context 'fjor' functions as a definitive noun referring to the previous year, showing its role as a subject in retrospection.