► 名詞兄弟  [(1)きょうだい]    
meaning:  brother  rank: 1☆ あの二
人は兄弟だ ⇨ Those two are brothers  
(☛ Biological brothers)兄弟  [(1)きょうだい]    
meaning:  sibling  rank: 1☆ 兄弟はいますか? ⇨ Do you have any siblings?  
(☛ Literally means “big brother and little brother”, but commonly used to mean any sibling combinations)