köken: Etymology tree Proto-Indo-European *de Proto-Balto-Slavic *da Proto-Slavic *do Old Polish do Polish do Proto-Indo-European *só Proto-Balto-Slavic *tas Proto-Slavic *tъ Old Polish ten Polish tych Proto-Indo-European *kʷey-der. Proto-Indo-European *k(ʷ)eh₁s- Proto-Balto-Slavic *keˀs-der. Proto-Slavic *čàsъ Old Polish czas Polish czas univ. Polish dotychczas Univerbation of do + tych + czas. The…