Bunkai? Not familiar w/ the word.

[Chizikunbo]

If I remember correctly Bunkai can actually be translated as "To break down" as to understand the movements. There are several reasons (threory) as to why the applications are hidden or if they are hidden, but it is better summed up in the likes of Bunkai or Bunseok (boon hae) is the conceptual study of forms, to understand their true meaning and value...
--josh