linchpin

And it was the altered visual environment that proved to be the linchpin for learning.

It’s why, as the club tries to map out its winter plans, Hernández looms as one of the offseason’s most important linchpins.

Helene dismantled farming operations that serve as linchpins for the nation's food supply chain.

This focus on the national debt and the federal deficit as a linchpin of economic policy dates back to the 1940s among Republicans and the 1970s among Democrats.

Ultimately, we believe that polls are the linchpins of democracy because they allow for immediate feedback to those in power; elections are feedback mechanisms as well but slower in their effect.