New Vocab: underpin

verb: underpin; 3rd person present: underpins; past tense: underpinned; past participle: underpinned; gerund or present participle: underpinning

support (a building or other structure) from below by laying a solid foundation below ground level or by substituting stronger for weaker materials.
support, justify, or form the basis for.
“the theme of honor underpinning the two books”



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