Dictionary/実弟じっていJittei実弟 (Jittei) is a Japanese noun meaning “biological younger brother”.Meaningsnounbiological younger brotherKanji in 実弟実reality弟younger brotherRelated words実fruit実はas a matter of fact弟子pupil真実truth事実fact弟younger brother誠truth現実reality実家(one's parents') home実るto bear fruit実際reality兄弟brothers and sisters