underpinning
noun(un-der-pin-ning)
the material and construction (such as a foundation) used for support of a structure
underpinning
noun(un-der-pin-ning)
something that serves as a foundation : basis, support —often used in plural
underpinning
noun(un-der-pin-ning)
underwear —usually used in plural
underpinning
verb(un-der-pin-ning)
support, substantiate
underpinning
verb(un-der-pin-ning)
to form part of, strengthen, or replace the foundation of