族弟

zúdì
  1. (archaic) a kinsmen (of the same clan) who is slightly junior to oneself
  2. a kinsmen (of the same clan) who is slightly junior to oneself
  3. third cousin (great-grandfather's brother's great-grandson younger than oneself)

Wiktionary

Entry Composition

=1 族 zú
  1. race
  2. nationality
  3. ethnicity
  4. clan
  5. by extension, social group (e.g. office workers 上班族)
=1 族 zòu
  1. (obsolete on its own in Standard Chinese) alternative form of 奏 (zòu)
  2. alternative form of 奏 (zòu)
=2 弟 dì
  1. younger brother
  2. junior male
  3. I (modest word in letter)
=2 弟 tì variant of 悌 tì