You searched for: “subsidence
subsidence (s) (noun), subsidences (pl)
1. The sinking down of land resulting from natural shifts or human activity, frequently causing structural damage to buildings.
2. The waning or lessening of something.
3. An abatement in intensity or degree; such as, in the manifestations of a disease.
4. Etymology: "to sink to the bottom," from Latin subsidere, "to settle, to sink, to sit down, or to remain"; from sub, "down" + sidere, "to settle" which is related to sedere, "to sit'.