verba -ver-ve'a- gismu

x1 is a child/kid/juvenile [a young person] of age x2, immature by standard x3.

Not necessarily human. See also cifnu, makcu, citno, panzi, nanla, nixli, se rirni, bersa.

In notes:

bersa
x1 is a son of mother/father/parents x2 [not necessarily biological].
cifnu
x1 is an infant/baby [helpless through youth/incomplete development] of species x2.
citno
x1 is young/youthful [relatively short in elapsed duration] by standard x2.
makcu
x1 is mature/ripe/fully-grown/adult in development-quality x2 (ka).
nanla
x1 is a boy/lad [young male person] of age x2 immature by standard x3.
nixli
x1 is a girl [young female person] of age x2 immature by standard x3.
panzi
x1 is a [biological] offspring/child/kid/hybrid of parent(s) x2; (adjective:) x1 is filial.
rirni
x1 is a parent of/raises/rears x2; x1 mentors/acts parental toward child/protege x2.
brabi'o
bi1=ba1 grows in size/becomes big to bi2 under conditions bi3.
citnau
n1=c1 is a youth/young man by standard c2.
kamve'a
c1 is the childhood (state of being a child) of v1.
purnyve'a
x1 is an igglybuff [pokemon]
ribve'a
c1=v1 is a cub, aged v2, of bear/ursoid species c2
selrirspe
x1 is the spouse of the child/offspring/protegé of x2 by standard/law/custom x3.
verbanfi
x1 is a tadpole/polliwog of amphibian species/breed x2
vercedra
c1 is the childhood (time of being a child) of v1.
verfi'e
x1 is a fry/whitebait of species x2
nonmu
x1 is an agender humanoid person [not necessarily adult].
nunmu
x1 is a non-binary humanoid person [not necessarily adult].
paznu
x1 is a non-binary offspring/child of parent(s) x2 [not necessarily biological]; x1 is filial (but not a son or daughter).
vepre
x1 is a non-binary child/kid/juvenile [a young person] of age x2 immature by standard x3.
altrici
x1 is altricial, requires nourishment, a baby, infant
remrnunmu
x1 is a non-binary-gendered humanoid person [not necessarily adult]
verntineidja
x1 is a teenager of age x2.