Ɲ - Apply To Neighbors
The resulting link is monadic, meaning it takes one argument. Note that the arity refers to that of the resulting link, not the number of links this quick consumes.
Apply a dyadic link or monadic chain to each pair of adjacent elements.
<dyad>Ɲ- apply the dyad between each pair
<monad>Ɲ- apply the monad to each pair
<link><nilad>Ɲ- apply the chain to each pair