sa'i VUhU4 cmavo

n-ary mathematical operator: operands are vectors to be treated as matrix columns.

On affix form:

sanli
x1 stands [is vertically oriented] on surface x2 supported by limbs/support/pedestal x3.

In notes:

nacmeimei
x1 is an x2 by x3 vector array/matrix of vectors x4, x5, x6...