"兄弟" (xiōng dì) in Engpsh is translated as "brother." The word "brother" originates from Old Engpsh "brether," which is derived from Proto-Germanic "brethren."
Examples of "brother" in Engpsh:
I have an older brother and a younger brother.
Our bond as brothers is unbreakable.
The fraternal bond between brothers can be strong.
Translations:
我有一个哥哥和一个弟弟。
我们作为兄弟的纽带是不可打破的。
兄弟之间的兄弟情谊可以很强烈。