Where does “st + ipsu” come from?

st + ipsu (Vulgar Latin) comes from Latin ipsum, from Latin ipse, from Proto-Italic *e(s)peso — himself, herself, itself.

Ancestry of “st + ipsu”, step by step

StepLanguageWordMeaning
1Latinipsumaccusative masculine singular of ipse; nominative...
2Latinipsehimself, herself, itself, the very, the actual;...
3Proto-Italic*e(s)pesohimself, herself, itself

Words derived from “st + ipsu”

Every word from Proto-Italic *e(s)peso →Every word from Latin ipse →Every word from Latin ipsum →