This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. To support from below, as with props, girders, or masonry.

v. To give support or substance to: "the public awareness that must underpin a sustained and concerted development effort for Africa and its youth” ( Barber B. Conable).

v. To support from below with props or masonry.

v. To give support to; to corroborate.

v. To lay stones, masonry, etc., under, as the sills of a building, on which it is to rest.

v. To support by some solid foundation; to place something underneath for support.

To pin or support underneath; place something under for support or foundation when a previous support is removed; underset; hence, figuratively, to support; prop.

v. support with evidence or authority or make more certain or confirm

v. support from beneath

"We've picked up a lot of product wins over the last several years with our key customers that kind of underpin it, but we haven't seen a market or systemic change across Cardiac Rhythm Management that is different from before."

underpinned    underpinning    underpins   

fit    tally    check    correspond    match    jibe    gibe    agree    support    sustain   

underpinning    underpinned   

underpinned    underpinning   

pro   

underpinnings    struggle    presupposition    quandary    instrumantmarket    shmale    relativist    probings    state-machine    realignment