demersion

/diˈmɜː(ɹ)ʒən/

Etymology

Latin demersio.

noun

  1. The act of plunging into a fluid; a drowning.
  2. The state of being overwhelmed in, or as if in, water.“[T]his Sinking and Demerſion of Buildings into the Earth is a manifeſt Sign of their Antiquity, vvhich is ſo much the greater, by hovv much the deeper they are ſunk.”