This is the 2183rd most frequent German word.
bruder
Brother.
This demonstrates the colloquial use of "Bruder" to signify a close bond with a person who isn't necessarily a biological sibling.
Manchmal nenne ich meinen besten Freund 'Bruder'.
Sometimes I call my best friend 'brother'.
In this sentence, "Bruder" is used as a familial term to refer to one's male sibling.
Mein Bruder ist sehr gut im Schachspiel.
My brother is very good at chess.
Here, "Bruder" is used in a comparative sense, showing an emotional or physical resemblance to the speaker's sibling.