This is the 13696th most frequent Turkish word.
köpeklerin
"The dogs'" (possessive form in Turkish).
'Köpeklerin' is in the genitive form, showing ownership or relation ('the dogs' barking').
Köpeklerin havlamasını duydum.
I heard the dogs barking.
'Köpeklerin' is in the possessive structure, indicating the subject performing the action ('the dogs running').
Bahçede köpeklerin koştuğunu gördüm.
In the garden, I saw the dogs running.
'Köpeklerin' indicates possession, discussing a characteristic belonging to 'the dogs' ('their backs').