thanks to @rowan I learned some fun #4D terms (taken from here) that I want to share:

ana: the direction towards +W (this is an absolute direction, like north)

kata: the direction towards -W (this is an absolute direction, like north)

wint: the “up”/positive direction perpendicular to your hyperplane (in other words, the “up” direction that you can’t see from inside of your hyperplane)

zant: the “down”/negative direction perpendicular to your hyperplane (in other words, the “down” direction that you can’t see from inside of your hyperplane)

here’s an example to hopefully explain what wint and zant mean: let’s say that your hyperplane is aligned with X, Y, and W - so you can’t see along the Z axis. that means the +Z direction is wint, and the -Z direction is zant

also, I made up the term “zwideways” to mean “across the wint-zant axis”. so for example “they pushed me sideways” means “they pushed me left or right” but “they pushed me zwideways” means “they pushed me wint or zant” (which is much more disorienting!)