This is the 8592nd most frequent Swedish word.
björnar
Björnar: Bears.
In this sentence, 'björnarna' refers specifically to bears as plural objects, showing the definite plural form of 'björnar' (bears).
Björnarna sover i sin grotta under vintern.
The bears sleep in their cave during the winter.
In this sentence, 'björnar' refers to bears as a plural noun, displaying the indefinite plural form.
Jag såg många björnar i skogen igår.
I saw many bears in the forest yesterday.
Here, 'björnar' is used in a general sense to discuss characteristics of bears as species, using the indefinite plural form to refer to them generically.