弟弟的英语单词是brother，brother的英式读音是[ˈbrʌðə(r)]，美式读音是[ˈbrʌðər]。brother主要用作名词，意思是：(同父母的)兄，弟; (称男性的共事者或同道)同事，弟兄，伙伴。
一、brother短语搭配
eldest brother长兄 ; 大哥
younger brother弟弟 ; 幼弟
Elder brother大阿哥 ; 哥哥 ; 老大哥
His brother他的哥哥
二、亲人称呼单词集锦
son儿子
daughter女儿
father爸爸
mother妈妈
grandfather爷爷
grandmother奶奶
husband丈夫
wife妻子
brother兄弟
sister姐妹
uncle叔叔
auntie阿姨
三、brother双语例句
1.My brother is my senior by two years.
我哥哥比我大两岁。
2.Don't be so mean to your little brother!
别对你弟弟那么刻薄！
3.My brother has a master's degree from Harvard.
我哥哥有哈佛大学的硕士学位。
4.My brother's much taller than me.
我哥哥比我高多了。
5.Her story coincided exactly with her brother's.
她和她兄弟所讲的完全一致。
6.I dashed off a note to my brother.
我急急忙忙给我弟弟写了个字条。
