Submergence (noun)

1. The act of submerging or sinking beneath a surface, especially a liquid surface.
2. The state of being covered or inundated with water.
3. The sinking or plunging of something into a liquid or other substance.

Origin:

Derived from the latin 'sub-' meaning under and 'mergere' meaning to dip, sink or immerse.

Examples:

1. The submarine's mission was to explore the ocean depths and study the various forms of marine life and their habitat.
2. The village was completely submerged by the flash flood and its inhabitants had to be rescued by the rescue teams.
3. The submergence of the ship in the ocean depths was a result of the damage it sustained in the storm.
4. The diver's deep-sea dive was an attempt to study the impact of the submergence on the coral reefs and the marine life.
5. The scientist was studying the effect of the submergence on the earth's crust and its plates.