Immersion (noun)

1. The act or process of immersing or being immersed in a substance.
2. The state of being completely absorbed or involved in an activity or experience.
3. The complete submersion of an object in a liquid.

Origin:

Derived from the latin word 'immersionem' meaning 'a plunging in'.

Examples:

1. The immersion of the pot in the boiling water was done to sterilize it.
2. The immersion of the students in the study of the language was intense.
3. The immersion of the country in the global economy was facilitated by the agreement.
4. The immersion of the audience in the movie was aided by the special effects.
5. The immersion of the diver in the ocean was made possible by the underwater gear.