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   Sill

   /sil/

   

   noun

   • 1. a shelf or slab of stone, wood, or metal at the foot of a window or doorway.
   • ▪ a strong horizontal member at the base of any structure, e.g., in the frame of a motor or rail vehicle.
   • ▪ a tabular sheet of igneous rock intruded between and parallel with the existing strata.
   • ▪ an underwater ridge or rock ledge extending across the bed of a body of water.

   Word Origin Old Englishsyll, sylle ‘horizontal beam forming a foundation’, of Germanic origin; related to German Schwelle ‘threshold’.

   Scrabble Points: 4

   • S

     1

   • I

     1

   • L

     1

   • L

     1

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