blood

1
A vital liquid flowing in the bodies of many types of animals that usually conveys nutrients and oxygen. In vertebrates, it is colored red by hemoglobin, is conveyed by arteries and veins, is pumped by the heart and is usually generated in bone marrow.
Some insects are known for consuming blood.
2
A family relationship due to birth, such as that between siblings; contrasted with relationships due to marriage or adoption. See blood relative, blood relation.
a friend of our own blood
Similar
background descent heritage
3
A member of the Los Angeles gang The Bloods, who typically wear red and have an intense and bitter rivalry with the Crips.
My union with the neighborhood kids teaches me Bloods don't say or write words starting with c's. This is how Bloods disrespect Crips. They replace all c's with k's or b's and cross out all remaining c's in the word.

1
To cause something to be covered with blood; to bloody.
The French gentleman and Mr Adderly, at the desire of their commanding officer, had raised up the body of Jones, but as they could perceive but little (if any) sign of life in him, they again let him fall, Adderly damning him for having blooded his wastecoat […]
2
To let blood (from); to bleed.

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