sinkage

/ˈsɪŋkɪdʒ/
noun
  1. The amount or process of sinking, especially of a ship, structure, or ground.
    • The ship's sinkage was gradual after the hull was breached.
    • After the flood, the sinkage of the road caused dangerous potholes.
    • The sinkage of the old pier was measured at two inches per year.
Antonyms