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   linchpin

   /ˈlɪn(t)ʃpɪn/

   noun

   • 1. a person or thing vital to an enterprise or organization: "nurses are the linchpin of the National Health Service"
   • 2. a pin passed through the end of an axle to keep a wheel in position.

   Word Origin late Middle English: from Old Englishlynis (in the sense ‘linchpin’) + pin.

   Scrabble Points: 15

   • L

     1

   • I

     1

   • N

     1

   • C

     3

   • H

     4

   • P

     3

   • I

     1

   • N

     1

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