with one's younger brother
弟と似てるね名前はアダマ？
You look like my little brother. Is your name Adama?
— 最強のふたり (2011)
僕はよく弟と間違えられる。
I'm often mistaken for my younger brother.
彼はよく弟と間違えられるんだ。
He’s often mistaken for his younger brother.
弟とは仲が良いよ。
I get along well with my younger brother.
彼はうちの弟と親しい。
He is close to my younger brother.
ビルと彼の弟と全然区別がつかない。
I can't tell Bill and his younger brother apart at all.
私は弟と口論するほど馬鹿ではありませんよ。
I'm not foolish enough to argue with my little brother.
私はよくジョンを双子の弟と混同する。
I often confuse John with his younger twin brother.
彼は彼女が弟とデートしていることに腹を立てた。
He was angry that she was dating his younger brother.
私はいつもジョンを双子の弟と混同する。
I always confuse John with his twin brother.
弟と映画を観に行ったんだ。
I went to see a movie with my younger brother.
私にはトムとトムの弟との区別がつかない。
I can't tell Tom and his younger brother apart.