Questions & Answers about Segern var otrolig.
Because segern is the definite singular form of seger.
- seger = victory / a victory
- segern = the victory
In Swedish, the definite article is usually added as an ending to the noun, instead of being a separate word like English the.
So here, -n is marking definiteness.
Swedish often puts the at the end of the noun instead of using a separate word.
So:
- seger = victory
- segern = the victory
That means Segern var otrolig already contains the inside segern.
A separate definite word like den is not used here. You would not normally say den segern unless you mean something more like that victory or you are adding extra description in a special structure.