reset bridi-level to zero
Auto-inserts all necessary terminators to reset to the top-level bridi of the sentence (i.e. everything that i would insert except the last vau). This is useful if you have opened multiple NU/NOI subclauses, and just want to close them all to add more sumti, terms, or a xoi clause to the main bridi without using a bunch of terminators. // May also be used with UI-cmavo. UI-cmavo placed immediately after i'au would scope over the entire sentence. This is useful for attaching attitudinals as afterthoughts, without having to close the entire sentence manually with the right number of vaus. See ji'au, fu'e, fu'o.