弟弟
dì di
In real, traceable use. Part of the curated seed collection; community review is coming.
A younger brother, a brother born after you. An older brother is 哥哥. The second syllable has a neutral tone: dìdi. 兄弟 means brothers, older and younger together.
Em trai, người em trai nhỏ tuổi hơn mình. Anh trai thì là 哥哥. Âm tiết thứ hai đọc thanh nhẹ: dìdi. 兄弟 là anh em trai nói chung. Tiếng Việt gọi chung là “em”, còn tiếng Trung luôn tách em trai (弟弟) với em gái (妹妹).
NounRegister: neutral
Examples
Editorial example (illustrative, not a corpus attestation) — awaiting a native-speaker check
Sources & notes
Hán-Việt bridge batch 063 (2026-11-14). Headword, Traditional form and pinyin checked against CC-CEDICT (CC BY-SA 4.0) source ↗ · Hán-Việt reading: Unihan kVietnamese source ↗ · No Vietnamese entry is linked as its twin; the Hán-Việt reading is given character by character. Definition, literal gloss and example sentence are original; the example has not had a native-speaker check yet.
Common questions
What does “弟弟” mean?
A younger brother, a brother born after you. An older brother is 哥哥. The second syllable has a neutral tone: dìdi. 兄弟 means brothers, older and younger together.
Is “弟弟” formal or informal?
弟弟 is generally neutral.