兄弟 | xiōng dì | brothers / younger brother / CL:個|个[ge4] / I, me (humble term used by men in public speech) / brotherly / fraternal | |
弟弟 | dì di | younger brother / CL:個|个[ge4],位[wei4] | |
弟 | dì | younger brother / junior male / I (modest word in letter) | |
阿弟 | ā dì | younger brother | |
幼弟 | yòu dì | younger brother |