This is the 1916th most frequent Swedish word.
okänt
Unknown.
In this sentence, 'okänt' is used as a predicate adjective describing the state of being unknown.
Det är okänt varför de gick iväg.
It is unknown why they left.
Here, 'okänt' functions as an attributive adjective providing information about the noun 'something'.
Han hittade något okänt i skogen.
He found something unknown in the forest.
In this case, 'okänt' is used as part of a verbal phrase describing a continuous or unchanged state.