underpin

/ˌʌndərˈpɪn/
verb
  1. To support or strengthen something from below, especially a structure.
    • The bridge was underpinned with steel beams after the earthquake.
    • They will underpin the wall before adding another floor to the house.
    • Engineers had to underpin the old building's foundation to prevent it from sinking.
  2. To form the basis or foundation for an idea, argument, or system.
    • Scientific evidence underpins the theory of climate change.
    • Trust and honesty underpin a healthy relationship.
    • The principles of democracy underpin the country's legal system.
Antonyms
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