backbone

Từ điển Oxford Advanced Learner 8th

back·bone [backbone backbones] BrE [ˈbækbəʊn] NAmE [ˈbækboʊn] noun
1. countable the row of small bones that are connected together down the middle of the back
Syn: ↑spine
2. singular the most important part of a system, an organization, etc. that gives it support and strength
•Agriculture forms the backbone of the rural economy.
3. uncountable the strength of character that you need to do sth difficult
•He doesn't have the backbone to face the truth.

• Từ đồng nghĩa / Synonyms:
  spine, spinal column, vertebral column, back, rachis, grit, guts, moxie, sand, gumption, anchor, mainstay, keystone, linchpin, lynchpin