This is the 5987th most frequent Swedish word.
jas
"Jas" in Swedish is an abbreviation for "Jakt, Attack, Spaning," meaning "Fighter, Attack, Reconnaissance," and often refers to the Saab JAS 39 Gripen fighter aircraft.
Here, 'jas' is used as a proper noun referring to the specific fighter aircraft model.
Sverige har utvecklat ett stridsflygplan som kallas Jas 39 Gripen.
Sweden has developed a fighter aircraft called Jas 39 Gripen.
In this sentence, 'jas' is used as a common noun to refer generically to a fighter aircraft.
Jag såg ett stort jas flyga över staden.
I saw a large fighter jet flying over the city.
Here, 'jas' is again a common noun used to discuss the specific type of aircraft, referring to exhibitions about it in a museum context.