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Underpinning is a 12 letter word which starts with the letter U and ends with the letter G for which we found 4 definitions.

(p. pr. & vb. n.) of Underpin
(n.) The act of one who underpins; the act of supporting by stones masonry or the like.
(n.) That by which a building is underpinned; the material and construction used for support introduced beneath a wall already constructed.
(n.) The foundation esp. of a frame house.
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