| dì | younger brother/junior male/I (modest word in letter) |
| tì | variant of 悌, to do one's duty as a younger brother |
| 弟 | younger brother junior male I (modest word in letter) |
| 弟兄 | brothers comrade |
| 弟兄们 | brethren |
| 弟妇 | younger brother's wife sister-in-law |
| 弟妹 | younger sibling younger brother's wife |
| 弟媳 | younger brother's wife sister-in-law |
| 弟子 | disciple follower |
| 弟弟 | younger brother CL:個|个 |