This is the 3843rd most frequent Swedish word.
kompisen
"The friend."
Here, 'kompisen' is in definite singular form, serving as the subject of the sentence.
Kompisen kommer alltid att hjälpa dig när du behöver.
The friend will always help you when you need.
In this case, 'kompisen' is a definite singular noun used as the object in the sentence.
Jag såg kompisen på caféet igår.
I saw the friend at the café yesterday.
Here, 'kompisen' is again in definite singular form, used as the object of the preposition 'med'.