Where does “perisaturnium” come from?

perisaturnium (English) comes from English -ium, from Latin -um, from Proto-Italic *-om, from Proto-Indo-European *-oHom.

Ancestry of “perisaturnium”, step by step

StepLanguageWordMeaning
1English-ium1997, Bryan Pfaffenberger, "Official Microsoft...
2Latin-umnominative neuter singular of -us; accusative...
3Proto-Italic*-om—
4Proto-Indo-European*-oHom—
Every word from Proto-Indo-European *-oHom →Every word from English -ium →Every word from Latin -um →