This is the 8824th most frequent Turkish word.
sina
The Turkish word "sina" does not have a commonly used standalone meaning. It may be a name or part of a phrase.
Here 'sana' is the dative form of 'sen' (you), indicating the indirect object of the action.
Bu yemek sana daha önce hiç tattırılmadı.
This dish has never been served to you before.
Here 'sana' is the dative form of 'sen' (you), again indicating the recipient of the effort.
Bizim için bu kadar uğraşmana gerek yok.
You don't need to put so much effort for us.
Here 'sana' is used as the dative case of 'sen', showing the entity towards whom the trust and support are directed.