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Verb: shore up
  1. Support by placing against something solid or rigid
    - prop up, prop, shore
  2. Support, help or boost something that would otherwise be weak or fail
    "try to shore up the nuclear deal"; "shore up the value of the dollar";
    - prop up, shore

Derived forms: shoring up, shored up, shores up

Type of: hold, hold up, support, sustain