Leftwise

and doing so they say that they do it themselves rightwise and the Hellenes leftwise.

Similarly, his "doubling procedure" consists in the same random starting interval […] whose length is doubled (leftwise or rightwise at random) recursively till both ends are outside the slice.

The leftwise action aims at what drifts out of the nunka domain of the nefarious. Similarly for mortuary arrangements, what is leftwise is more momentous than what is rightwise.