#undermining

• Scour — The act of scouring and its result; a hydrodynamic phenomenon of local erosion, washing away, and excavation of a riverbed or soil at the base of a hydraulic structure, such as bridge piers or dikes, under the direct action of strong currents. This structural process can jeopardize the stability of the entire foundation if consolidation measures are not applied.
• Encroachment — The act of attempting or violating, and its result; the deed through which one tries to commit a violent, destructive, or illegal action against a person, social order, an institution, or constitutional rule. In historical legal terminology, it represents the material deed or conspiracy meant to destabilize a governing structure or harm fundamental rights.