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Shoring
Shoring is the process of temporarily supporting a building, vessel, structure, or trench with shores (props) when in danger of collapse or during repairs or alterations. Shoring comes from shore, a timber or metal prop. Shoring may be vertical, angled, or horizontal.
Wikipedia
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Bracing (adjective)
Invigorating or stimulating.
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Bracing (noun)
That which braces.
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Bracing (noun)
A brace.
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Bracing (noun)
A form of the military attention stance.
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Shoring (noun)
Temporary bracing used to prevent something, such as a tunnel, trench, or wall, from collapse.
Wiktionary