citno -cit-ci'o- gismu

x1 is young/youthful [relatively short in elapsed duration] by standard x2.

Also age (= nilnalci'o); (adjective:) x1 is junior. See also laldo, cnino, slabu, verba.

In notes:

cnino
x1 is new/unfamiliar/novel to observer x2 in feature x3 (ka) by standard x4; x1 is a novelty.
slabu
x1 is old/familiar/well-known to observer x2 in feature x3 (ka) by standard x4.
verba
x1 is a child/kid/juvenile [a young person] of age x2, immature by standard x3.
bavyfarvi
f1 ages / passes through time into future form f2 = b1 from current / past / earlier form f3 = b2 through stages f4.
citmle
m1 is cute to m2 in aspect m3.
citnau
n1=c1 is a youth/young man by standard c2.
djasluni
x1 is a common onion/bulb onion/garden onion (Allium cepa) of variety/breed x2.
nalci'o
x1 is senior/older/other than young by standard x2.
nunci'o
n1 is the youth of c1.
tolni'o
x1 is old (un-novel) to observer x2 in feature x3 (ka) by standard x4
laldo
x1 is old/aged [relatively long in elapsed duration] by standard x2
jo'ai
convert a selbri tag followed by a tanru unit to a tanru unit; differently from {jai}, it does not change the first place of the tanru unit.
spartrifoli
s1 is a clover/trefoil (genus Trifolium) of species/strain/cultivar s2.