觿

ivory bodkin for undoing knots

CEDICT

  1. (historical) fid; bodkin; awl (initially made of bone or ivory and used to untie knots, later made of jade and used as an ornament)
  2. fid; bodkin; awl (initially made of bone or ivory and used to untie knots, later made of jade and used as an ornament)

Wiktionary

製成锥子可解绳结可作佩饰

重編國語辭典