linchpin
noun /ˈlɪntʃpɪn/
/ˈlɪntʃpɪn/
(also lynchpin)
- a person or thing that is the most important part of an organization, a plan, etc., because everything else depends on them or it
(组织、计划等的)关键人物,关键事物 - Nurses are the linchpin of the health service.
护士是卫生服务的关键。
词源late Middle English: from Old English lynis (in the sense ‘linchpin’) + pin. - Nurses are the linchpin of the health service.