n. 1 pin inserted through an axletree to hold a wheel on; 2 a central cohesive source of support and stability
The mechanic replaced the linchpin. Spelled as one word.
The mechanic replaced the linchpin. Spelled as one word.
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pin to hold a wheel on; pin on an axletree; anchor; mainstay; keystone
wheel
2 syllables
linch-pin
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