Latin word sto comes from Proto-Indo-European *sth₂-, and later Proto-Italic *staēō (Stand.)

Detailed word origin of sto

Dictionary entry	Language	Definition
*sth₂-	Proto-Indo-European (ine-pro)
*sth₂éh₁yeti	Proto-Indo-European (ine-pro)
*staēō	Proto-Italic (itc-pro)	Stand.
sto	Latin (lat)	(Medieval Latin) I [currently] am (feel). (Medieval Latin) I am [located at]. I stand. I stay, remain.

Words with the same origin as sto