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English definition of “underpinning”

underpinning

noun [C or U]
 
 
/ˈʌndəˌpɪnɪŋ/
something that provides support for something, or that is the starting point from which something can develop: A strong opening on Wall Street provided a firm underpinning for the FTSE 100.
(Definition of underpinning from the Cambridge Business English Dictionary © Cambridge University Press)
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