ganti gismu

x₁ is a/the testes/ovary/testicle/scrotum/balls/gonad/stamen/pistil [body-part] of x₂, gender x₃.

Egg/sperm/pollen/gamete producing/bearing organ. See also plibu, sovda, pinji, gutra, mabla.

In notes:

gutra: x₁ is a/the womb/uterus [body-part] of x₂; [metaphor: nourishing, protective, giving birth].
mabla: x₁ is execrable/deplorable/wretched/shitty/awful/rotten/miserable/contemptible/crappy/inferior/low-quality in property x₂ by standard x₃; x₁ stinks/sucks in aspect x₂ according to x₃.
pinji: x₁ is a/the clitoris/penis [projecting reproductive organ; body-part] of x₂.
plibu: x₁ is a/the pubic area/external genitalia [body-part] of x₂.
sovda: x₁ is an egg/ovum/sperm/pollen/gamete of/from organism [mother/father] x₂.
gantydakli: d₁ is a scrotum of g₂.
rulfe'iganti: x₁ is the pistil of flower/species x₂.
rulnakyganti: x₁ is the stamen of flower/species x₂.