This is the 3359th most frequent Swedish word.
arabiska
Arabic (language).
Here, 'arabiska' is used as a noun referring to the Arabic language, indicating the subject being studied.
Jag studerar arabiska på universitetet.
I am studying Arabic at the university.
In this sentence, 'arabiska' is a noun describing the language that is spoken fluently by the subject.
Hon talar flytande arabiska.
She speaks fluent Arabic.
Here, 'arabiska' is used as a noun indicating the source language in a translation context.