Proto-Indo-European Roots

Root/Stem: *kreu-
Meaning:  flesh
Hellenic Greek kreas < *krewas 'flesh', Homeric krn
Italic Latin cruor 'gore', cruentus 'bloody'
Celtic Common Celtic *krovos 'blood' >
Early Irish cr, cr, Welsh crau, Cornish crow, Scottish cr
Indic Sanskrit kravis 'raw flesh'
Iranian Avestan xrra- 'bloody'
Germanic Common Germanic *xraw- 'flesh' >
Old High German hr, hrawr, Old Saxon hr, Old English hraw, Old Icelandic hrr 'flesh'
German Roh
Baltic Common Baltic *krau- 'blood' >
Lithuanian kraujas 'blood', kravinti 'to bleed', Old Prussian crauyo, krawia 'blood'
Slavic Common Slavic *kry, gen. *krve 'blood' >
Ukrainian krov, Macedonian & Serbo-Croatian & Slovene & Slovak krv, Czech krev, Old Polish kry, Polish krew, Upper Sorbian krej, Lower Sorbian kšej, Polabian kroj
Notes: A perfect example of a non-palatal Indo-European *k preserved in all 'satem' languages without becoming a spirant. The original meaning 'raw flesh' was changed by another one 'blood' is some languages. It happened perhaps due to a tabooed Indo-European word for 'blood' which was regarded to as a divine power. A more archaic word for 'blood' in Proto-Indo-European was *esr.-, preserved in Hittite and Greek.