弟弟     dìdi     younger brother

繁体 traditional:
语法 grammar: 名词 Noun
笔记 notes: 家弟 is formal, in contrast to the informal 弟弟 (Sun 2006, loc. 977)
上概念 parent concept: (Family)
话题 topic: 现代汉语 (Modern Chinese)

量词 Measure words:

Pinyin English