moxna experimental gismu

x1 is not enough/an insufficient amount/too little/too few of x2 by standard x3.

toldu'a is the shortcoming/shortage/what is absent of something by some standard; moxna is that which is present, even though it is not enough. In other words, moxna and toldu'a are complements of one another (such that they sum to sacni). See also: toldu'e; dukse, ranlu, sacni, moxna; mo'anzu; mo'a.

In notes:

ranlu
x1 is enough/a sufficient amount of x2 by standard x3.
sacni
x1 is an exactly sufficient/barely enough/just right amount of x2 by standard x3.
mo'anzu
x1 is too little/insufficient in x2 (ka) to be/do x3 (ka).