[with obj.]support (a building or other structure) from below by laying a solid foundation below ground level or by substituting stronger for weaker materials 加固(建筑物或其他)地下基础 ■support, justify, or form the basis for 支持;巩固,构成…的基础 the theme of honour underpinning the two books. 荣誉这一主题是这两本书的基调。