This is the 7103rd most frequent Turkish word.
dostları
"Friends" (possessive, meaning "his/her/its friends" or "their friends").
In this sentence, "dostları" refers to his close friends, showing possession.
Dostlarıyla sahilde buluştu.
He met with his friends at the beach.
Here, "dostları" is used in the subject position to indicate a group of supportive friends.
Dostları onu her zaman destekler.
His friends always support him.
"Dostları" in this sentence belongs to Hasan, showing close friends making an act of kindness.