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lynchpin

DEFINITIONS OF: lynchpin

1

n a central cohesive source of support and stability

Synonyms:
anchor, backbone, keystone, linchpin, mainstay
Type of:
support
something providing immaterial assistance to a person or cause or interest

n pin inserted through an axletree to hold a wheel on

Synonyms:
linchpin
Type of:
pin
a small slender (often pointed) piece of wood or metal used to support or fasten or attach things
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