This is the 677th most frequent Norwegian word.
ukjent
"Ukjent" means "unknown" in English.
Here, 'ukjent' describes the noun 'bok' (book), indicating it is unfamiliar or not recognized.
Jeg fant en ukjent bok i hyllen.
I found an unknown book on the shelf.
Here, 'ukjent' operates as a noun, meaning 'stranger' or someone unknown.
Hun følte seg som en ukjent i det nye landet.
She felt like a stranger in the new country.
In this sentence, 'ukjent' is used as a predicate adjective to indicate that the information is not known.