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underpinning JUST WRITTEN FOR YOU

/ˈʌndərˌpɪnɪŋ/ · un·der·pin·ning
verb
  1. To support from below with props, masonry, or other means. The crew spent the morning underpinning the old tunnel to prevent collapse.
  2. To give support to; to corroborate or substantiate. Strong empirical data are underpinning the new climate model.
noun
  1. A support or foundation, especially a masonry structure that supports a wall. The house's underpinning was inspected for cracks before the renovation.
  2. A basis or underlying principle for something. The underpinning of the argument lies in decades of research.
  3. The lower body or legs, especially when considered as a supporting part of the body. He strained his underpinning during the marathon and had to rest.
Did you know? The technique of structural underpinning became widespread in Victorian London to stabilize buildings after the introduction of deep excavations for the underground railway.
Written by Lexi Wordsworth, Dictionary Editor 0 lookups Added Jul 16, 2026