Questions & Answers about Jeg kjenner personen.
- Jeg = I
- kjenner = know / am acquainted with
- personen = the person
So the natural English meaning is I know the person.
In Norwegian, the definite article is often attached to the end of the noun.
- en person = a person
- personen = the person
So instead of putting a separate word like English the in front, Norwegian usually adds a definite ending.
Here, -en is the definite singular ending for this noun.