Word

賢弟

けんてい
wise younger brother; polite reference to another's younger brother, or to one's junior
Word

孝弟

孝悌
こうてい
filial piety; brotherly love
Word

愚兄賢弟

ぐけいけんてい
a foolish older brother and a smart younger
Word

乳兄弟

乳姉妹
ちきょうだい
foster brother or sister
Word

令弟

れいてい
your younger brother
Word

弟娘

おとうとむすめ、おとむすめ
younger daughters
Word

王弟

おうてい
royal prince; crown prince's younger brother
Word

乙姫

弟姫
おとひめ
youngest princess
Word

姉弟

してい、きょうだい
older sister and younger brother
Word

四海兄弟

exp
しかいけいてい
people in the whole world being all brothers; universal brotherhood