Attaches all of the following words to the next explicitly mentioned sumti as seltau of that sumti or selbri which is explicitly marked with "cu" (under left-grouping by default).
Terminates with the explicit introduction of a sumti or "cu", or the end of the text, only; these markings must be explicit. It applies to that sumti or selbri (whichever comes first). Can be used in order to modify words like "mi" adjectivally, but might be able to even apply large structures like whole brivla as seltau to sumti if used properly.