bleed: [OE] As its form suggests, bleed is a derivative of blood, but a very ancient one. From Germanic *blōtham ‘blood’ was formed the verb *blōthjan ‘emit blood’, which came into Old English as blēdan, ancestor of bleed. => blood
Old English bledan "to let blood," in Middle English and after, "to let blood from surgically;" also "to emit blood," from Proto-Germanic *blodjan "emit blood" (cognates: Old Norse blæða, German bluten), from *bhlo-to- "swell, gush, spurt" (see blood (n.)). Meaning "extort money from" is from 1670s. Of dyes or paints, from 1862. Related: Bled; bleeding.