伯仲叔季

bózhòngshūjì
(idiom) eldest, second, third and youngest of brothers; order of seniority among brothers

CEDICT

eldest, second, third and youngest of brothers; order of seniority among brothers

Wiktionary

兄弟长幼的次序

維基詞典

Entry Composition

1 伯仲 bózhòng
  1. (literary, figurative) equally capable individuals
  2. (literary, figurative) seniority; rank; superiority and inferiority
  3. (literary, literal) eldest brother and second eldest brother
  4. eldest brother and second eldest brother
  5. equally capable individuals
  6. seniority; rank; superiority and inferiority
2 叔季 shūjì
  1. (archaic) the House of the Descendants of Shu Ya (died 662 BCE) and the House of the Descendants of Ji You (died 644 BCE)
  2. (archaic) those who monopolize power
  3. the House of the Descendants of Shu Ya (died 662 BCE) and the House of the Descendants of Ji You (died 644 BCE)
  4. those who monopolize power