undergird
verb
un·der·gird
ˌən-dər-ˈgərd
undergirded; undergirding; undergirds
1
archaic
: to make secure underneath
took measures to undergird the ship—Acts 27:17 (Revised Standard Version)
2
: to form the basis or foundation of : strengthen, support
facts and statistics subtly undergird his commentary—Susan Q. Stranahan
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Merriam-Webster unabridged
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