脊樑骨 [－梁－]

Jyutping zek3 loeng2 gwat1
Pinyin jǐ liáng gǔ

Definitions (Wiktionary)
  1. noun, figuratively
    backbone; courage; ambition
  2. noun, figuratively
    backbone; mainstay; core
  3. noun
    spine; vertebra; backbone