Hypertext Webster Gateway: "lynchpin"
From WordNet (r) 1.7 (wn)
lynchpin
n 1: a central cohesive source of support and stability: "faith
is his anchor"; "he is the linchpin of this firm" [syn:
{anchor}, {mainstay}, {backbone}, {linchpin}]
2: pin inserted through an axletree to hold a wheel on [syn: {linchpin}]
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