nilnalci'o lujvo

ni1 is the age [elapsed duration] of c1 by standard c2

In notes:

citno
x1 is young/youthful [relatively short in elapsed duration] by standard x2.
bavyfarvi
f1 ages / passes through time into future form f2 = b1 from current / past / earlier form f3 = b2 through stages f4.
citmau
z1=c1 is younger than z2 by amount z4.
citrai
t1=c1 is youngest among t4.