弟
otōtoA male sibling who is younger than the speaker or another reference person.
彼は弟思いの兄です。
He is a brother who cares deeply about his younger brother.
In Japanese family terminology, '弟' specifically refers to a younger brother. The opposite term for an older brother is '兄' (ani).
Related Phrases
💡Pro Tip
Family Terms
Remember that '弟' is specifically for younger brothers, while '兄' is for older brothers. The terms '姉' and '妹' are used for sisters.
⚡Gold Rule
Honorific Usage
In formal or polite contexts, use '弟さん' or '弟君' when referring to someone else's younger brother.
📖Word Origin
The kanji '弟' consists of '兄' (older brother) and '小' (small), literally meaning 'smaller brother.'
📝Usage Notes
In formal contexts, '弟さん' or '弟君' may be used as honorific forms. The term can also metaphorically refer to a junior or subordinate in certain contexts.