おとうと 弟 Common word JLPT N5 Wanikani level 5 Play audio LinksSentence search for 弟Sentence search for おとうとSentence search for ていKanji details for 弟Edit in JMdict Noun1. younger brother; little brother; kid brotherSee also 兄かれ彼はわたし私とおとうと弟をとりちが取り違えた。He mistook me for my younger brother.Noun2. brother-in-law (spouse's younger brother or younger sister's husband)Only applies to おとうと, See also 義弟Noun3. pupil; apprenticeArchaic, Only applies to ていOther forms弟 【てい】 Discussions Log in to talk about this word.