blood brotherˌblood ˈbrother noun [countable] 
a man who promises loyalty to another, often in a ceremony in which the men’s blood is mixed together
a man who promises loyalty to another, often in a ceremony in which the men’s blood is mixed together- double helix
- double indemnity
- double jeopardy
- double-jointed
- double life
- double negative
- double-park
- double play
- double-quick
- double quick
- double-sided
- doublespeak
- double standard
- doublet
- double take
- double-talk
- doublethink
- double-time
- double time
- double vision
- double whammy
- doubloon
- doubly
- doubt
- doubter