骨干

骨幹
gǔgàn
  1. diaphysis (long segment of a bone)
  2. fig. backbone

CEDICT

Entry Composition

1 骨 gǔ bone
2 干 gàn
  1. tree trunk
  2. main part of sth
  3. to manage
  4. to work
  5. to do
  6. capable
  7. cadre
  8. to kill (slang)
  9. to fuck (vulgar)
  10. (coll.) pissed off
  11. annoyed