pino de segurança; elemento essencial; peça-chave
1. A pin passed through the end of an axle to keep a wheel in place
The linchpin held the wheel firmly on the axle.
O pino de segurança mantinha a roda firmemente no eixo.
2. A person or thing that is the most important element holding something together; a crucial factor
She was the linchpin of the entire operation.
Ela era a peça-chave de toda a operação.
3. Something that serves as the central element on which everything else depends
Education is the linchpin of economic development.
A educação é o elemento essencial do desenvolvimento econômico.
In both American and Brazilian English, 'linchpin' has evolved from a purely mechanical term to a widely used metaphor in business, politics, and academic contexts. In Brazil, 'peça-chave' is the most commonly used idiomatic equivalent, while Portuguese speakers tend to preserve more mechanical terminology. The word carries weight in corporate presentations and strategic discussions in both cultures, often used to identify critical success factors or key personnel.
NYC Slang
the real MVP; the glue that holds things together
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