Where does “festiwal” come from?
festiwal (Polish) comes from French festival, from English festival, from Old French festival, from Latin fēstīvālis, from Latin fēstīvus, from Latin -īvus, from Proto-Indo-European -iHwós, from Proto-Indo-European -wós — Creates adjectives from verb stems.
festiwal (Polish): festival
Ancestry of “festiwal”, step by step