xulgau lujvo

x1 smooths/flattens/levels x2

i.e. to remove lumps, bumps, wrinkles. Also iron out, sand, file. For "flatten" as in "make horizontal", see pingau, pinpu'i.


In notes:

pingau
x1 places x2 in a horizontal position by reference frame x3; x1 lays x2 down
rufple
x1 is sandpaper made of x2
tafxulca'a
x1 is an iron/flatiron (device for removing wrinkles from clothing)