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L sill
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noun Carpentry.
a sill for a building frame composed of a plate resting on the basement wall and a header or joist at the outer edge of the plate.
QUIZ
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Question 1 of 7
Fill in the blank: I canāt figure out _____ gave me this gift.
Compare box sill.
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, Ā© Random House, Inc. 2023