From PIE *bʰleh₃- (to swell, burst forth), probably sharing its root with 'bloom' and 'blossom' — blood named for the way it surges outward.
The red liquid that circulates in the arteries and veins of humans and other vertebrates.
From Old English "blōd" ("blood"), from Proto-Germanic *blōþą ("blood"), of debated PIE origin but most commonly traced to PIE *bʰleh₃- ("to swell, to gush, to bloom") with a semantic path from "swelling forth" to "that which gushes." The Proto-Germanic form produced Old Frisian "blōd," Old Saxon "blōd," Old Norse "blóð," Dutch "bloed," German "Blut," and Gothic "bloþ" — a pan-Germanic inheritance with no clear cognates outside Germanic, making this one of the distinctive vocabulary items of the Germanic branch. Some scholars connect it instead to PIE