Where does “stulta” come from?

stulta (Ido) comes from Latin stultus, from Proto-Indo-European ster- — sterile, infertile.

stulta (Ido): silly

Definitions

Step	Language	Word	Meaning
1	Latin	stultus	foolish, fatuous, stupid, ill-considered
2	Proto-Indo-European	ster-	sterile, infertile

stulta — Etymology, Origin & Word History | Etymology Explorer