啃骨頭
kěn​gǔ​tou

to gnaw a bone

kěn​gǔ​tou to gnaw a bone
  1. 啃 kěn verb
    to gnaw
    To gnaw, nibble, or bite off something hard bit by bit using the front teeth
  2. 骨头 骨頭 gū​tou noun
    bone
    the hard tissue forming the skeleton of humans and vertebrate animals; bone

kěn​gǔ​tou to tackle a tough problem
  1. 啃 kěn
    to study hard
    (figurative) To pore over or delve into a difficult book or subject
  2. 骨头 骨頭 gǔ​tou
    moral integrity
    strength of character or moral fiber; integrity