demersion /diˈmɜː(ɹ)ʒən/ noun2 •The act of plunging into a fluid; a drowning. •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. — 1692 formsdemersions