Definition
弟弟 (dìdi) means 'younger brother' — the opposite of 哥哥 (gēge, older brother). Use it to refer to a male sibling who is younger than you. 兄弟 (xiōngdì, HSK4) is a broader term for 'brothers' (both older and younger) or, informally, just 'younger brother'.
noun
younger brother
Measure word · 个, 位
Examples
- 弟弟。Zhè shì wǒ de dì di.This is my younger brother.
- 弟弟？Nǐ dì di jǐ suì le?How old is your younger brother?
- 弟弟。Wǒ dì di bù hē kāfēi.My younger brother doesn't drink coffee.
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