noun /ˈlɪntʃ.pɪn/
Linchpin

The smallest part — and the most important.

1.
Origin
A small iron pin slid into the axle to keep the cart's wheel from coming off.

From Old English lynis (axle). A cart needs wheels to roll, but without the tiny pin holding the wheel in place, it can't move an inch.

2.
Meaning
The irreplaceable core that keeps something running.

Not flashy. Never the part that takes the stage. But take it out and everything stops. That's why dictionaries define a linchpin as "the most essential element holding a complex thing together."

We'll be the tool that holds your work in place,
so it never stops moving.

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