rorci -ror- gismu

x1 engenders/procreates/begets x2 with coparent x3.

See also grute, gutra, rirni, se panzi, mamta, patfu, tarbi, bersa, ferti, jbena, sovda.

In notes:

bersa
x1 is a son of mother/father/parents x2 [not necessarily biological].
ferti
x1 is fertile/conducive for supporting the growth/development of x2; x1 is fruitful/prolific.
grute
x1 is a fruit [body-part] of species x2.
gutra
x1 is a/the womb/uterus [body-part] of x2; [metaphor: nourishing, protective, giving birth].
jbena
x1 is born to x2 at time x3 [birthday] and place x4 [birthplace]; x1 is native to (fo) x4.
mamta
x1 is a mother of x2; x1 bears/mothers/acts maternally toward x2; [not necessarily biological].
panzi
x1 is a [biological] offspring/child/kid/hybrid of parent(s) x2; (adjective:) x1 is filial.
patfu
x1 is a father of x2; x1 begets/sires/acts paternal towards x2; [not necessarily biological].
rirni
x1 is a parent of/raises/rears x2; x1 mentors/acts parental toward child/protege x2.
sovda
x1 is an egg/ovum/sperm/pollen/gamete of/from organism [mother/father] x2.
tarbi
x1 is an embryo/zygote/fetus/fertilized egg with mother x2, and father x3.
rorlei
x1 is a generation [contemporary offspring] of x2.
selrorci
x2=r1 engenders/procreates/begets x1=r2 with coparent x3=r3.
teryrorci
x3=r1 engenders/procreates/begets x2=r2 with coparent x1=r3.
paznu
x1 is a non-binary offspring/child of parent(s) x2 [not necessarily biological]; x1 is filial (but not a son or daughter).
abvorci
x1 is a grandparent of x2 which/who has another grandparent x3 such that x1 is related to x2 by relationship x4, and x1 is related to x3 by relationship x5 which is NOT their mutual mating/intimate partnering, under cultural/personal paradigm x6; x1 and x3 are mutual co-grandparents.
abvroi
x1 is a grandparent of x2 which/who has another grandparent x3 such that x1 is related to x2 by relationship x4, and x1 is related to x3 by mating/intimate partnering relationship x5, under cultural/personal paradigm(s) x6; x1 and x3 are mutually partnered co-grandparents.
malternrorci
x1 is an absent or deadbeat co-parent of x2, the 'primary' parent of whom is x1.