graumrei fu'ivla

x1 is x2 (li; default: 1) dimensionless units on scale/by standard x3.

This word follows the tradition of grake and mitre etc. except it is for the empty/trivial unit (something having dimensionality of '1'). This is not the same as the dimension itself, which is still li pa; just as the dimension of a quantity of meters is length/displacement.