This is the 8250th most frequent Polish word.
owca
Sheep.
Here, 'owca' refers to the animal 'sheep' in its singular form, acting as the subject of the sentence.
Owca pasie się na łące.
The sheep grazes in the meadow.
In this sentence, 'owiec' is the genitive plural form, used to describe the number and the collective noun 'stado' (flock).
Stado owiec przechodzi przez wieś.
The flock of sheep is passing through the village.
'Owcę' is the accusative singular form, indicating a direct object in the sentence, describing a young sheep.