pobrissó (Catalan) comes from Catalan o, from Latin aut, from Proto-Italic *auti, from Proto-Indo-European h₂ewti, from Proto-Indo-European h₂ew, from Proto-Indo-European ǵʰe — Postpositional intensifying particle: indeed, at any rate, in fact.
Ancestry of “pobrissó”, step by step
pobrissó traces back through two separate lines of ancestry.