underpinning

باللغة العربية: أَسَاس، دِعَامَة

1. A support or foundation, especially as a structure of masonry that supports a wall. · This house's underpinning is not up to standard.
2. A basis for something. (figuratively) · I would like to know more about the underpinning of this political theory.
3. The lower body or legs. (figuratively)

الجمع underpinnings