An example of a linchpin is an argument that connects evidence and effectively proofs a point.
- a pin that goes through the end of an axle outside the wheel to keep the wheel from coming off
- anything or anyone regarded as crucial or essential
Origin of linchpinMiddle English lynspin ; from lyns (; from Old English lynis, linchpin, akin to German lünse ; from Indo-European base an unverified form (e)lei- to bend from source ell, Sanskrit ??íh, linchpin) + pin, pin
- A locking pin inserted in the end of a shaft, as in an axle, to prevent a wheel from slipping off.
- A central cohesive element: Reduced spending is the linchpin of their economic program.
Origin of linchpinMiddle English linspin : lins, linchpin (from Old English lynis) + pin, pin (from Old English pinn; see pin).
Middle English lynspin, compound of lins 'axletree' and pin, from Old English lynis 'linchpin', from Proto-Germanic *luniso (compare German LÃ¼nse), from Proto-Indo-European (compare Welsh olwyn (“wheel"), Old Armenian Õ¸Õ²Õ¶ (oÅ‚n, “back; spine, backbone"), Sanskrit [script?] (Äá¹‡Ãs)). Figurative use attested from the mid-20th century.