dAppui

D'appui is a French noun meaning "support" or "bearing." It designates a point, element, or device that bears or reinforces another element. The term is used in both literal and figurative senses, from structural components to political backing.

Etymology: It comes from the noun appui (support) with the preposition de fused by elision, yielding d'appui. It is typically written with an apostrophe. In some contexts, especially in branding or stylized writing, the form dappui may appear, but standard French generally preserves the apostrophe after d.

In architecture and engineering: appuis refer to supports that bear loads or stabilize structures. Examples include appui de fenêtre (windowsill), appui de porte (door frame support), and appui de pont (abutment or bridge support). In mechanics, point d'appui indicates a contact point or fulcrum for a lever.

Figurative use: avoir l'appui de quelqu'un means to have someone's backing or support; bénéficier d'un appui politique refers to political backing. The term can describe any form of support, assistance, or endorsement.

See also: appui, disambiguation. Note: d'appui is distinct from appui when used as a separate word; dappui as a single word is uncommon and typically encountered only in specific names or stylized branding.