This is the 4597th most frequent Russian word.
гуся
"Гуся" means "goose" (genitive singular or accusative singular in Russian).
The word 'гуся' is in the accusative case, used here as a direct object in the sentence.
Я купил гуся на рынке.
I bought a goose at the market.
The word 'гуся' is in the accusative case, representing the specific goose being referred to in the question.
Видишь ли того гуся у озера?
Do you see that goose by the lake?
Here, 'гуся' is also in the accusative case, functioning as the object of the action described in the sentence.