Where does “крів” come from?

крів (Ukrainian) comes from Proto-Slavic kry, from Proto-Balto-Slavic krū́ˀs, from Proto-Indo-European kréwh₂s, from Proto-Indo-European krewh₂- — blood outside the body.

Ancestry of “крів”, step by step

StepLanguageWordMeaning
1Proto-Slavickryblood
2Proto-Balto-Slavickrū́ˀsblood
3Proto-Indo-Europeankréwh₂sblood
4Proto-Indo-Europeankrewh₂-blood outside the body
Every word from Proto-Indo-European krewh₂- →Every word from Proto-Indo-European kréwh₂s →Every word from Proto-Balto-Slavic krū́ˀs →