gonado-

Etymology tree
Proto-Indo-European *ǵenh₁-
Proto-Indo-European *ǵíǵn̥h₁eti
Proto-Hellenic *gígnomai
Ancient Greek γίγνομαι (gígnomai)
Ancient Greek -ᾱ (-ā)
Ancient Greek -η (-ē)
Ancient Greek γονή (gonḗ)
Ancient Greek -άζω (-ázō)
Ancient Greek -ᾰ́ς (-ắs)
New Latin gonadēsbor.
English gonad
Ancient Greek -ο- (-o-)der.
Latin -o-bor.
English -o-
English gonado-
By surface analysis, gonad + -o-.