This is the 4535th most frequent Turkish word.
babasını
"Babasını" means "his/her father" in English.
In this sentence, 'babasını' is in the accusative case, referring to 'his father' as the object of the main verb 'öğrenince' (when he learned).
Ali, babasının bir ressam olduğunu öğrenince çok şaşırdı.
Ali was very surprised to learn that his father is a painter.
Here, 'babasını' again is in the accusative case, indicating 'his father' as the object of the verb 'görmek' (to see).
Çocuk, babasını görmek için sabırsızlanıyordu.
The child was eager to see his father.
'Babasını' in this sentence is also in the accusative case, serving as the object of the verb 'izliyordu' (was watching).