nanla gismu

x1 is a boy/lad [young male person] of age x2 immature by standard x3.

Word dispreferred in metaphor/example as sexist; (use verba). See also nixli, verba, nanmu, bersa.

In notes:

bersa
x1 is a son of mother/father/parents x2 [not necessarily biological].
nanmu
x1 is a man/men; x1 is a male humanoid person [not necessarily adult].
nixli
x1 is a girl [young female person] of age x2 immature by standard x3.
verba
x1 is a child/kid/juvenile [a young person] of age x2, immature by standard x3.
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.
einla
x1 is a gender role for boys in culture x2; in culture x2, typical boys are obliged to do x1.
remrnunmu
x1 is a non-binary-gendered humanoid person [not necessarily adult]
nanl
Master