The term 'over (collapse)' can be solved by the four letter word 'KEEL'. A KEEL is a structural element of a boat or ship that runs along the bottom of the hull and provides stability and strength. It is usually the first part of a vessel to be constructed, and is often made of wood, steel, or fiberglass. The KEEL helps to keep the vessel upright in the water and prevents it from capsizing or collapsing.