01
兄弟
きょうだい
siblings
Meanings
- younger brother
- faithful service to elders
Readings
Onyomi
- テイ
- ダイ
- デ
Kunyomi
- おとうと
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Useful words
02
弟子
でし
apprentice
03
弟さん
おとうとさん
younger brother
polite form
04
義弟
ぎてい
younger brother-in-law
05
師弟
してい
teacher and student
06
実弟
じってい
biological younger brother
Compare Kanji
01兄Pair94%elder brother, big brotherYounger brother and older brother are a perfect sibling pair, separated mainly by age.02妹Pair82%younger sisterBoth mark younger siblings, with gender as the important difference.03姉Pair78%elder sisterOlder sister gives another sibling role, helping learners map the family set around 弟.04子Meaning74%child, sign of the ratA younger brother is still a child in many family examples, so 子 keeps the role simple.05児Meaning72%newborn babe, childThe child label in 児 supports the younger-age side of 弟.06家Meaning68%house, homeFamily context makes the brother meaning easier to place, even without a shape link.