Where does “mesmo” come from?

mesmo (Old Portuguese) comes from Vulgar Latin metipsimus, from Latin ipse, from Proto-Italic *e(s)peso — himself, herself, itself.

Ancestry of “mesmo”, step by step

StepLanguageWordMeaning
1Vulgar Latinmetipsimussame
2Latinipsehimself, herself, itself, the very, the actual;...
3Proto-Italic*e(s)pesohimself, herself, itself

Words derived from “mesmo

Every word from Proto-Italic *e(s)pesoEvery word from Latin ipseEvery word from Vulgar Latin metipsimus
mesmo — Etymology, Origin & Word History | Etymology Explorer