Where does “patina” come from?

patina (Italian) comes from Latin patīna, from Ancient Greek πατάνη, from Proto-Indo-European pet-ano, from Proto-Indo-European pete-, from Proto-Finnic ete-, from Serbo-Croatian tẹ́, from Proto-Slavic ta — inflection of *tъ: ## feminine singular ##...

patina (Italian): A patina; A coat, film, glaze, size, patina;...