This is the 8754th most frequent Turkish word.
saçlar
"Saçlar" means "hair" in English.
Here, 'saçlarım' means 'my hair' and is used to imply the person's own hair, collectively referring to the strands.
Saçlarım çok uzadı, bu yüzden kuaföre gitmem gerekiyor.
My hair has grown very long, so I need to visit the hairdresser.
In this sentence, 'saçlarını' means 'her hair', used in an object case to depict the strands being affected by the wind.
Rüzgar saçlarını dans ettiriyordu.
The wind was making her hair dance.
Here, 'saçlar' generically refers to 'hair' as a collective concept regarding appearance.