Cvi in Panini's grammar of Classical Sanskrit refers to a formation where an ī is aded to a nominal stem and compounded with a verbal root kr "to make", as "to be" or bhū "to become", resulting in a factitive verb where the ī-stem is indeclinable and used like a preverb. For example, grāmī-bhū "to get possession of a village" (from grāma "village").