This is the 665th most frequent Turkish word.
baş
"Baş" means "head" in English.
Here, 'baş' refers to 'head' in its anatomical sense.
Başım ağrıyor.
My head hurts.
Here, 'baş' is a root word in 'başarılı', meaning 'successful', where it implies 'success' or 'achievement'.
Başarılı bir öğrenci olmak için çalışıyorum.
I am working to become a successful student.
Here, 'baş' is part of the verb 'başlamak', which means 'to start', indicating the beginning of an action or event.