underpinning
verb
Definitions
To support from below with props or masonry.
Example: You should underpin the mine roof to prevent further collapse.
To give support to; to corroborate.
Example: Public confidence in politicians must underpin our democracy.
noun
Definitions
A support or foundation, especially as a structure of masonry that supports a wall.
Example: This house's underpinning is not up to standard.
A basis for something.
Example: I would like to know more about the underpinning of this political theory.
The lower body or legs.