| term | pronunciation | English |
|---|
| 兄弟 | きょうだい | brothers, a sibling, siblings |
| 弟 | おとうと | one's younger brother |
| 子弟 | してい | sons, children |
| 兄弟姉妹 | きょうだいしまい | brothers and sisters, siblings |
| 兄弟げん | きょうだいげんか | a quarrel between siblings |
| 弟子 | でし | a pupil, a disciple, a follower, an apprentice |
| 弟さん | おとうとさん | (someone else's) younger brother |
| 従兄弟 | いとこ | a male cousin, a first [full] (male, boy) cousin |
| 兄弟子 | あにでし | senior schoolmate, senior apprentice |
| 内弟子 | うちでし | private pupil, apprentice |
| 実弟 | じってい | one's (biological) younger brother |
| 師弟 | してい | teacher and student |
| 弟妹 | ていまい | younger brother and sister |
| 義弟 | ぎてい, おとうと | younger brother-in-law |
| 舎弟 | しゃてい | my younger brother; underling (e.g. in yakuza) |