Where does “krwiożerczy” come from?

krwiożerczy (Polish) comes from Polish krew, from Old Polish krew, from Proto-Slavic kry, from Proto-Balto-Slavic krū́ˀs, from Proto-Indo-European kréwh₂s, from Proto-Indo-European krewh₂- — blood outside the body.

krwiożerczy (Polish): bloodsucking, sanguivorous, hematophagous (feeding on blood)

Definitions

bloodsucking, sanguivorous, hematophagous (feeding on blood)

Ancestry of “krwiożerczy”, step by step

krwiożerczy traces back through two separate lines of ancestry.

via Polish krew

Step	Language	Word	Meaning
1	Polish	krew	blood
2	Old Polish	krew	blood
3	Proto-Slavic	kry	blood
4	Proto-Balto-Slavic	krū́ˀs	blood
5	Proto-Indo-European	kréwh₂s	blood
6	Proto-Indo-European	krewh₂-	blood outside the body

via Polish żreć

Step	Language	Word	Meaning
1	Polish	żreć	to gorge, to stuff oneself, to eat greedily, to...
2	Proto-Slavic	žerti	to devour, glut; Alternative form of *žьrti
3	Proto-Balto-Slavic	gerˀtei	devour, lap up
4	Proto-Indo-European	gʷerh₃-	to swallow, devour, eat

Every word from Proto-Indo-European krewh₂- →Every word from Proto-Indo-European kréwh₂s →Every word from Proto-Balto-Slavic krū́ˀs →