Prop

A shell, used as a die. See Props.

To support, or prevent from falling, by placing something under or against; as, to prop up a fence or an old building; (Fig.) to sustain; to maintain; as, to prop a declining state.

That which sustains an incumbent weight; that on which anything rests or leans for support; a support; a stay; as, a prop for a building.

support by placing against something solid or rigid; "shore and buttress an old building"

a support placed beneath or against something to keep it from shaking or falling