lynchpin

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. a central cohesive source of support and stability
- faith is his anchor
- the keystone of campaign reform was the ban on soft money
- he is the linchpin of this firm
• Syn:
anchor, mainstay, keystone, backbone, linchpin
• Derivationally related forms:
anchor (for: anchor)
• Hypernyms:
support
2. pin inserted through an axletree to hold a wheel on
• Syn:
linchpin
• Hypernyms:
pin