弟 (dì) means “younger brother; junior male; I (modest word in letter)”. It is an HSK 1 Chinese character in the HSK 3.0 vocabulary.
我有一个弟弟和一个妹妹。
Wǒ yǒu yī gè dìdi hé yī gè mèimei.
I have a younger brother and a younger sister.
Updated: 2026-07-18