*kreuə-, Proto-Indo-European root meaning "raw flesh."
It forms all or part of:
creatine; creosote; crude; cruel; ecru; pancreas; raw; recrudesce; recrudescence.
It is the hypothetical source of/evidence for its existence is provided by: Sanskrit kravis- "raw flesh," krura- "raw, bloody;" Greek kreas "flesh;" Latin crudus "bloody, raw; cruel," cruor "thick blood;" Old Irish cru "gore, blood," Middle Irish cruaid "hardy, harsh, stern;" Old Church Slavonic kry "blood;" Old Prussian krawian, Lithuanian kraūjas "blood;" Old English hreaw "raw," hrot "thick fluid, serum."
Meaning "extort money from" is from 1670s. Of dyes or paints, "to be washed out," from 1862. Figuratively, of the heart, "to suffer anguish, feel pity or sorrow," late 14c.
"living in the blood" (as a parasite does), by 1889, from Latin sanguis "blood" (see sanguinary) + colere "to inhabit" (see colony). Also, with classical stem, sanguinicolous.
"descended from a common ancestor," c. 1600, from French consanguin (14c.), from Latin consanguineus "of the same blood," from assimilated form of com "with, together" (see con-) + sanguineus "of blood" (see sanguinary).