The systematic redivision of existing material: a phrase's bols stay intact while their grouping, stress, or placement against the cycle changes. Think 4+4 becoming 3+3+2, accents migrating off the beat, a theme's halves swapping position.
This is the analytical core of kaida development and a shared inheritance with dhrupad singing, where the same word names the splitting of song text across the tala. It rewards players who treat a phrase as divisible material rather than a fixed run of strokes.