This is the 166th most frequent Turkish word.
belli
Clear; obvious; certain.
'Belli' here means 'clear' or 'evident', describing uncertainty.
Kimin kazandığı belli değil.
It is not clear who won.
'Belli' here means 'specific', indicating a particular time.
Belli bir saatte buluşalım.
Let's meet at a specific time.
'Belli' here means 'clearer', used in a comparative form to imply increased clarity.