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undernourished
underpainting
underpants
underpart
underparts
underpass
underperform
underpin
underpinning
underplay
underplot
underprice
underprivileged
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underpinning

un·der·pin·ning [ úndər pìnning ] (plural un·der·pin·nings)


noun 
Definition:
 
1. supporting structure: a structure built to support a weakened wall or building

2. foundation for something: something that supports or acts as a foundation for something ( often used in the plural )

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