Brothers
Siblings
noun
You have an older brother and a younger brother. Wow! Both are here. These are brothers!
きょうだい
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
わたしには、兄弟が二人います。
I have two siblings.
マリオとルイージって兄弟だったの！？
Were Mario and Luigi brothers!?
あの兄弟は好きだけど、あいつらのもっているぬいぐるみは好きじゃない。
I like those brothers, but I hate their stuffed animals.