Support from below is a term used to describe the process of providing stability and reinforcement to a structure from beneath. This is often done by using materials such as concrete, steel, or timber to strengthen the foundation of a building or other structure. The term 'UNDERPIN' is an 8-letter word that is used to describe this process. Underpinning is a common practice in construction and engineering, and is used to ensure the safety and stability of a structure.