linchpin
English Thesaurus
1. pin inserted through an axletree to hold a wheel on (noun.artifact)
| hypernym | : | pin, |
| definition | : | a small slender (often pointed) piece of wood or metal used to support or fasten or attach things (noun.artifact) |
2. a central cohesive source of support and stability (noun.cognition)
| hypernym | : | support, |
| definition | : | something providing immaterial assistance to a person or cause or interest (noun.cognition) |
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