Uncoalesce

It is clear that what sound change has coalesced, sound change cannot uncoalesce; and the probability is vanishingly small that analogy and borrowing should proceed in such a way as to restore just the situation that had pertained before the restructuring.

The neighbor function can perform one of the following operations: (i) exchange the content of two memory locations; (ii) move the content of one memory location; (iii) uncoalesce a coalesced node into two or more nodes; or (iv) coalesce two memory locations.