This is the 11050th most frequent Turkish word.
dostunuzu
"Your friend"
Here, 'dostunuzu' is used as the direct object in the sentence, denoting the action of supporting directed toward 'your friend'.
Dostunuzu bu zor günlerde desteklemek çok önemlidir.
Supporting your friend during these tough times is very important.
In this context, 'dostunuzu' refers to the direct object of listening, pointing out to 'your friend'.
Dostunuzu her zaman dürüst bir şekilde dinlemelisiniz.
You should always listen to your friend honestly.
'Dostunuzu' in this sentence serves as the recipient of the action (calling), and is the direct object in the construction.