What word is abbreviated by "N" in names of destructive Lisp functions?

Question

What word is abbreviated by "N" in names of destructive Lisp functions?

Answer 1

Here is a direct answer from Linearity's link:

The N stands for non-consing, meaning it doesn't need to allocate any new cons cells.

Instead of allocating new cells, the old cells are reused resulting in destructive/impure modifications.

Signalling destructive behavior is critical, but it's also nice to know that the non-consing variants are typically faster as they don't copy objects and leave garbage lying around.

The specific section containing this information is titled: "Destructive" Operations