pin pau lujvo

x₁ is a row/rank of table/chart x₂.

see also rajypau

lensisku

In notes:

gredi: x₁ is a grid/grill/mesh/lattice [shape/form] of material x₂.
gredile: x₁ is a grill/grid/graticule consisting of lines x₂
rajypau: x₁ is a column/file of table/chart x₂.