Russian квас

← Old East Slavic квасъ (inherited)

← Proto-Slavic *kvasъ (inherited)

→ English kvass (borrowed)

→ German Kwass (borrowed)

→ Spanish kvas (borrowed)

→ Armenian կվաս (borrowed)

→ Japanese クワス (borrowed)

→ Korean 크바스 (mention)

→ Norwegian Bokmål kvass (derived)

→ Norwegian Nynorsk kvass (derived)

→ Romanian cvas (borrowed)

→ Russian квасить (affix)

→ Serbo-Croatian kvas (mention)

→ Serbo-Croatian квас (borrowed)