This is the 3292nd most frequent Turkish word.
hesaplarını
"Their accounts" or "their calculations."
The word 'hesaplarını' here is used as a plural noun in the accusative case, referring to 'accounts' owned by the subject.
Kendi hesaplarını kontrol etti.
He checked his own accounts.
The word 'hesaplarını' functions as a direct object in the sentence, showing possession ('your accounts') in the accusative case.
Hesaplarını bana açar mısın?
Can you open your accounts for me?
In this sentence, 'hesaplarını' is the object of the verb, denoting 'his friend's accounts' in plural and accusative case, with possession defined by the context.