Meaning of dì:
dì
弟
Noun
younger brother; junior male; variant of 悌[ti4]
Wǒ de dìdì jīntiān guò shēngrì.
我的弟弟今天过生日。
My younger brother is celebrating his birthday today.
Wǒ de dìdì fēicháng cōngmíng.
我的弟弟非常聪明。
My younger brother is very smart.
Tā shì wǒ zuì xǐhuān de xiōngdì.
他是我最喜欢的兄弟。
He is my favorite brother.
Pronoun
I (modest word in letter)
Zài xìn de jiéwěi, wǒ xiě shàng le “zhù hǎo, dì”.
在信的结尾，我写上了“祝好，弟”。
At the end of the letter, I wrote 'Best wishes, I (弟)'.
