blood-brother

n man who has sworn to treat another man as his brother, usu in a ceremony in which their blood is mixed together 盟兄弟, 把兄弟（通常指歃血为盟的）.

block vote (also card vote), block-buster, block-busting, blockade, blockage, blockhead, blockhouse, bloke, blond, blood, blood bank, blood count, blood feud, blood group (also blood type), blood orange, blood pressure, blood sports, blood test, blood transfusion, blood-bath, blood-curdling, blood-donor, blood-heat, blood-letting, blood-lust, blood-money, blood-poisoning (also toxaemia), blood-red, blood-relation, blood-stained, blood-vessel, bloodhound, bloodily, bloodless, bloodshed, bloodshor, bloodshot, bloodstock, bloodstream, bloodsucker,