köken: Attested first from the year 1731, borrowed from Polish kozyr, also kozer, variants of kozyra, kozera (“trump; card-sharper; card-game; struggle, calamity”), a dialectal variant – already attested in the 16ᵗʰ century in the sense “trump” – of kostera, kostyra (“card sharper”), from kość (“die”), also kozyrnik, kozernik (“card-shark; fullam-player”). Compare as another cardgame term that has…